path: root/contrib/crossrpms/patches/gcc-core-4.4.2-rtems4.10-20091015.diff

diff -Naur gcc-4.4.2.orig/configure gcc-4.4.2-rtems4.10-20091015/configure
--- gcc-4.4.2.orig/configure	2009-04-25 06:10:29.000000000 +0200
+++ gcc-4.4.2-rtems4.10-20091015/configure	2009-10-15 18:36:00.000000000 +0200
@@ -2267,6 +2267,7 @@
     noconfigdirs="$noconfigdirs target-newlib target-libiberty target-libgloss ${libgcj} target-libmudflap"
     ;;
   *-*-rtems*)
+    skipdirs="$skipdirs target-libiberty"
     noconfigdirs="$noconfigdirs target-libgloss ${libgcj}"
     ;;
     # The tpf target doesn't support gdb yet.
@@ -6259,7 +6260,7 @@
        # to it.  This is right: we don't want to search that directory
        # for binaries, but we want the header files in there, so add
        # them explicitly.
-       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include'
+       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
 
        # Someone might think of using the pre-installed headers on
        # Canadian crosses, in case the installed compiler is not fully
diff -Naur gcc-4.4.2.orig/configure.ac gcc-4.4.2-rtems4.10-20091015/configure.ac
--- gcc-4.4.2.orig/configure.ac	2009-04-25 06:10:29.000000000 +0200
+++ gcc-4.4.2-rtems4.10-20091015/configure.ac	2009-10-15 18:36:00.000000000 +0200
@@ -502,6 +502,7 @@
     noconfigdirs="$noconfigdirs target-newlib target-libiberty target-libgloss ${libgcj} target-libmudflap"
     ;;
   *-*-rtems*)
+    skipdirs="$skipdirs target-libiberty"
     noconfigdirs="$noconfigdirs target-libgloss ${libgcj}"
     ;;
     # The tpf target doesn't support gdb yet.
@@ -2560,7 +2561,7 @@
        # to it.  This is right: we don't want to search that directory
        # for binaries, but we want the header files in there, so add
        # them explicitly.
-       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include'
+       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
 
        # Someone might think of using the pre-installed headers on
        # Canadian crosses, in case the installed compiler is not fully
diff -Naur gcc-4.4.2.orig/gcc/config/avr/t-rtems gcc-4.4.2-rtems4.10-20091015/gcc/config/avr/t-rtems
--- gcc-4.4.2.orig/gcc/config/avr/t-rtems	2004-11-23 04:44:03.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/gcc/config/avr/t-rtems	2009-10-15 18:36:00.000000000 +0200
@@ -1,3 +1,4 @@
 # Multilibs for avr RTEMS targets.
 
-# ATM, this is just a stub
+# RTEMS uses _exit from newlib
+LIB1ASMFUNCS := $(filter-out _exit,$(LIB1ASMFUNCS))
diff -Naur gcc-4.4.2.orig/gcc/config/lm32/arithmetic.c gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/arithmetic.c
--- gcc-4.4.2.orig/gcc/config/lm32/arithmetic.c	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/arithmetic.c	2009-10-15 18:36:00.000000000 +0200
@@ -0,0 +1,305 @@
+/* Fixed-point arithmetic for Lattice Mico32.
+   Contributed by Jon Beniston <jon@beniston.com> 
+   
+   Copyright (C) 2008 Free Software Foundation, Inc.
+
+   This file is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by the
+   Free Software Foundation; either version 2, or (at your option) any
+   later version.
+
+   In addition to the permissions in the GNU General Public License, the
+   Free Software Foundation gives you unlimited permission to link the
+   compiled version of this file into combinations with other programs,
+   and to distribute those combinations without any restriction coming
+   from the use of this file.  (The General Public License restrictions
+   do apply in other respects; for example, they cover modification of
+   the file, and distribution when not linked into a combine
+   executable.)
+
+   This file is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; see the file COPYING.  If not, write to
+   the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.  */
+
+typedef unsigned long UQItype __attribute__ ((mode (QI)));
+typedef	long SItype __attribute__ ((mode (SI)));
+typedef unsigned long USItype __attribute__ ((mode (SI)));
+
+/* Prototypes */
+
+USItype __mulsi3 (USItype a, USItype b);
+
+USItype __udivmodsi4 (USItype num, USItype den, int modwanted);
+SItype __divsi3 (SItype a, SItype b);
+SItype __modsi3 (SItype a, SItype b);
+USItype __udivsi3 (USItype a, USItype b);
+USItype __umodsi3 (USItype a, USItype b);
+
+SItype __ashlsi3 (SItype a, SItype b);
+SItype __ashrsi3 (SItype a, SItype b);
+USItype __lshrsi3 (USItype a, USItype b);
+
+/* Multiplication */
+
+#ifdef L_mulsi3
+USItype 
+__mulsi3 (USItype a, USItype b)
+{
+  USItype result;
+    
+  result = 0;
+
+  if (a==0)
+    return 0;
+
+  while (b!=0)
+    {
+      if (b & 1)
+        result += a;
+      a <<= 1;
+      b >>= 1;
+    }
+       
+  return result;    
+}
+#endif
+
+/* Division */
+
+#ifdef L_udivmodsi4
+USItype
+__udivmodsi4 (USItype num, USItype den, int modwanted)
+{
+  USItype bit = 1;
+  USItype res = 0;
+
+  while (den < num && bit && !(den & (1L<<31)))
+    {
+      den <<=1;
+      bit <<=1;
+    }
+  while (bit)
+    {
+      if (num >= den)
+	{
+	  num -= den;
+	  res |= bit;
+	}
+      bit >>=1;
+      den >>=1;
+    }
+  if (modwanted) 
+    return num;
+  return res;
+}
+#endif
+
+#ifdef L_divsi3
+
+static const UQItype __divsi3_table[] = {
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 3, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 4, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 5, 2, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 6, 3, 2, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 7, 3, 2, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 8, 4, 2, 2, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0,
+  0, 9, 4, 3, 2, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
+  0, 10, 5, 3, 2, 2, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0,
+  0, 11, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0,
+  0, 12, 6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 0, 0, 0,
+  0, 13, 6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 0, 0,
+  0, 14, 7, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 0,
+  0, 15, 7, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1,
+};
+
+SItype
+__divsi3 (SItype a, SItype b)
+{
+  int neg = 0;
+  SItype res;
+  int cfg;
+
+  if (b == 0) 
+    {
+      /* Raise divide by zero exception */
+      int eba;
+      __asm__ __volatile__ ("rcsr %0, EBA" : "=r" (eba));
+      eba += 32 * 5;
+      __asm__ __volatile__ ("mv ea, ra");
+      __asm__ __volatile__ ("b %0" : : "r" (eba)); 
+    }
+
+  if (((USItype)(a | b)) < 16)
+    {
+      res = __divsi3_table[(a << 4) + b];
+    } 
+  else
+    {
+
+      if (a < 0)
+        {
+          a = -a;
+          neg = !neg;
+        }
+    
+      if (b < 0)
+        {
+          b = -b;
+          neg = !neg;
+        }
+    
+      __asm__ ("rcsr %0, CFG" : "=r" (cfg));
+      if (cfg & 2)
+        __asm__ ("divu %0, %1, %2" : "=r" (res) : "r" (a), "r" (b));
+      else 
+        res = __udivmodsi4 (a, b, 0);
+    
+      if (neg)
+        res = -res;
+    }
+
+  return res;
+}
+#endif
+
+#ifdef L_modsi3
+SItype
+__modsi3 (SItype a, SItype b)
+{
+  int neg = 0;
+  SItype res;
+  int cfg;
+  
+  if (b == 0) 
+    {
+      /* Raise divide by zero exception */
+      int eba, sr;
+      /* Save interrupt enable */
+      __asm__ __volatile__ ("rcsr %0, IE" : "=r" (sr));
+      sr = (sr & 1) << 1;
+      __asm__ __volatile__ ("wcsr IE, %0" : : "r" (sr));
+      /* Branch to exception handler */
+      __asm__ __volatile__ ("rcsr %0, EBA" : "=r" (eba));
+      eba += 32 * 5;
+      __asm__ __volatile__ ("mv ea, ra");
+      __asm__ __volatile__ ("b %0" : : "r" (eba)); 
+    }
+  
+  if (a < 0)
+    {
+      a = -a;
+      neg = 1;
+    }
+
+  if (b < 0)
+    b = -b;
+
+  __asm__ ("rcsr %0, CFG" : "=r" (cfg));
+  if (cfg & 2)
+    __asm__ ("modu %0, %1, %2" : "=r" (res) : "r" (a), "r" (b));
+  else 
+    res = __udivmodsi4 (a, b, 1);
+
+  if (neg)
+    res = -res;
+
+  return res;
+}
+#endif
+
+#ifdef L_udivsi3
+USItype
+__udivsi3 (USItype a, USItype b)
+{
+  if (b == 0) 
+    {
+      /* Raise divide by zero exception */
+      int eba, sr;
+      /* Save interrupt enable */
+      __asm__ __volatile__ ("rcsr %0, IE" : "=r" (sr));
+      sr = (sr & 1) << 1;
+      __asm__ __volatile__ ("wcsr IE, %0" : : "r" (sr));
+      /* Branch to exception handler */
+      __asm__ __volatile__ ("rcsr %0, EBA" : "=r" (eba));
+      eba += 32 * 5;
+      __asm__ __volatile__ ("mv ea, ra");
+      __asm__ __volatile__ ("b %0" : : "r" (eba)); 
+    }
+  
+  return __udivmodsi4 (a, b, 0);
+}
+#endif
+
+#ifdef L_umodsi3
+USItype
+__umodsi3 (USItype a, USItype b)
+{
+  if (b == 0) 
+    {
+      /* Raise divide by zero exception */
+      int eba, sr;
+      /* Save interrupt enable */
+      __asm__ __volatile__ ("rcsr %0, IE" : "=r" (sr));
+      sr = (sr & 1) << 1;
+      __asm__ __volatile__ ("wcsr IE, %0" : : "r" (sr));
+      /* Branch to exception handler */
+      __asm__ __volatile__ ("rcsr %0, EBA" : "=r" (eba));
+      eba += 32 * 5;
+      __asm__ __volatile__ ("mv ea, ra");
+      __asm__ __volatile__ ("b %0" : : "r" (eba)); 
+    }
+  
+  return __udivmodsi4 (a, b, 1);
+}
+#endif
+
+#if 0
+
+/* Shifts - Optimized versions implemented in assembly. Use these if code space is preferred to performance.  */
+
+#ifdef L_ashlsi3
+SItype 
+__ashlsi3 (SItype a, SItype b)
+{
+  int i;
+  
+  for (i = (b & 0x1f); i > 0; --i)
+    a += a;
+  return a;
+}
+#endif
+
+#ifdef L_ashrsi3
+SItype
+__ashrsi3 (SItype a, SItype b)
+{
+  int i;
+  
+  for (i = (b & 0x1f); i > 0; --i)
+    __asm__ ("sri      %0, %0, 1" : "=r" (a) : "0" (a));
+  return a;
+}
+#endif
+
+#ifdef L_lshrsi3
+USItype
+__lshrsi3 (USItype a, USItype b)
+{
+  int i;
+  
+  for (i = (b & 0x1f); i > 0; --i)
+    __asm__ ("srui     %0, %0, 1" : "=r" (a) : "0" (a));
+  return a;
+}
+#endif
+
+#endif 
diff -Naur gcc-4.4.2.orig/gcc/config/lm32/crti.S gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/crti.S
--- gcc-4.4.2.orig/gcc/config/lm32/crti.S	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/crti.S	2009-10-15 18:36:00.000000000 +0200
@@ -0,0 +1,45 @@
+# crti.S for Lattice Mico32 
+# Contributed by Jon Beniston <jon@beniston.com>
+#
+# Copyright (C) 2008 Free Software Foundation, Inc. 
+#
+# This file is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation; either version 2, or (at your option) any
+# later version.
+#
+# In addition to the permissions in the GNU General Public License, the
+# Free Software Foundation gives you unlimited permission to link the
+# compiled version of this file into combinations with other programs,
+# and to distribute those combinations without any restriction coming
+# from the use of this file.  (The General Public License restrictions
+# do apply in other respects; for example, they cover modification of
+# the file, and distribution when not linked into a combine
+# executable.)
+#
+# This file is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; see the file COPYING.  If not, write to
+# the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+# Boston, MA 02110-1301, USA.  
+# 
+
+        .section .init
+        .global _init
+        .type _init,@function
+        .align 4
+_init:
+        addi    sp, sp, -4        
+        sw      (sp+4), ra
+
+        .section .fini
+        .global _fini
+        .type _fini,@function
+        .align 4
+_fini:        
+        addi    sp, sp, -4        
+        sw      (sp+4), ra
diff -Naur gcc-4.4.2.orig/gcc/config/lm32/crtn.S gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/crtn.S
--- gcc-4.4.2.orig/gcc/config/lm32/crtn.S	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/crtn.S	2009-10-15 18:36:00.000000000 +0200
@@ -0,0 +1,42 @@
+# crtn.S for Lattice Mico32
+# Contributed by Jon Beniston <jon@beniston.com>
+#
+# Copyright (C) 2008 Free Software Foundation, Inc. 
+#
+# This file is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation; either version 2, or (at your option) any
+# later version.
+#
+# In addition to the permissions in the GNU General Public License, the
+# Free Software Foundation gives you unlimited permission to link the
+# compiled version of this file into combinations with other programs,
+# and to distribute those combinations without any restriction coming
+# from the use of this file.  (The General Public License restrictions
+# do apply in other respects; for example, they cover modification of
+# the file, and distribution when not linked into a combine
+# executable.)
+#
+# This file is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; see the file COPYING.  If not, write to
+# the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+# Boston, MA 02110-1301, USA.  
+# 
+
+        .section .init
+        
+        lw      ra, (sp+4)
+        addi    sp, sp, 4
+        ret
+                
+        .section .fini
+        
+        lw      ra, (sp+4)
+        addi    sp, sp, 4
+        ret
+        
diff -Naur gcc-4.4.2.orig/gcc/config/lm32/lib1funcs.S gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/lib1funcs.S
--- gcc-4.4.2.orig/gcc/config/lm32/lib1funcs.S	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/lib1funcs.S	2009-10-15 18:36:00.000000000 +0200
@@ -0,0 +1,429 @@
+# lib1funcs.S for Lattice Mico32 
+# Contributed by Jon Beniston <jon@beniston.com>
+#
+# Copyright (C) 2008 Free Software Foundation, Inc. 
+#
+# This file is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation; either version 2, or (at your option) any
+# later version.
+#
+# In addition to the permissions in the GNU General Public License, the
+# Free Software Foundation gives you unlimited permission to link the
+# compiled version of this file into combinations with other programs,
+# and to distribute those combinations without any restriction coming
+# from the use of this file.  (The General Public License restrictions
+# do apply in other respects; for example, they cover modification of
+# the file, and distribution when not linked into a combine
+# executable.)
+#
+# This file is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; see the file COPYING.  If not, write to
+# the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+# Boston, MA 02110-1301, USA.  
+# 
+
+/* Arithmetic left shift */
+        
+        .text
+
+        .global __ashlsi3
+        .type __ashlsi3,@function
+        .align 4
+        
+__ashlsi3:
+        /* Only use 5 LSBs, as that's all the h/w shifter uses */
+        andi    r2, r2, 0x1f
+        /* Get address of offset into unrolled shift loop to jump to */
+#ifdef __PIC__
+        orhi    r3, r0, gotoffhi16(__ashlsi3_table)
+        addi    r3, r3, gotofflo16(__ashlsi3_table)
+        add     r3, r3, gp
+#else
+        mvhi    r3, hi(__ashlsi3_table)
+        ori     r3, r3, lo(__ashlsi3_table)
+#endif
+        add     r2, r2, r2
+        add     r2, r2, r2
+        add     r3, r3, r2
+        lw      r3, (r3+0)
+        b       r3        
+        
+__ashlsi3_31:
+        add     r1, r1, r1
+__ashlsi3_30:
+        add     r1, r1, r1
+__ashlsi3_29:
+        add     r1, r1, r1
+__ashlsi3_28:
+        add     r1, r1, r1
+__ashlsi3_27:
+        add     r1, r1, r1
+__ashlsi3_26:
+        add     r1, r1, r1
+__ashlsi3_25:
+        add     r1, r1, r1
+__ashlsi3_24:
+        add     r1, r1, r1
+__ashlsi3_23:
+        add     r1, r1, r1
+__ashlsi3_22:
+        add     r1, r1, r1
+__ashlsi3_21:
+        add     r1, r1, r1
+__ashlsi3_20:
+        add     r1, r1, r1
+__ashlsi3_19:
+        add     r1, r1, r1
+__ashlsi3_18:
+        add     r1, r1, r1
+__ashlsi3_17:
+        add     r1, r1, r1
+__ashlsi3_16:
+        add     r1, r1, r1
+__ashlsi3_15:
+        add     r1, r1, r1
+__ashlsi3_14:
+        add     r1, r1, r1
+__ashlsi3_13:
+        add     r1, r1, r1
+__ashlsi3_12:
+        add     r1, r1, r1
+__ashlsi3_11:
+        add     r1, r1, r1
+__ashlsi3_10:
+        add     r1, r1, r1
+__ashlsi3_9:
+        add     r1, r1, r1
+__ashlsi3_8:
+        add     r1, r1, r1
+__ashlsi3_7:
+        add     r1, r1, r1
+__ashlsi3_6:
+        add     r1, r1, r1
+__ashlsi3_5:
+        add     r1, r1, r1
+__ashlsi3_4:
+        add     r1, r1, r1
+__ashlsi3_3:
+        add     r1, r1, r1
+__ashlsi3_2:
+        add     r1, r1, r1
+__ashlsi3_1:
+        add     r1, r1, r1
+__ashlsi3_0:
+        ret
+        
+#ifdef __PIC__
+        .section .data
+#else
+        .section .rodata
+#endif        
+
+        .align 4
+
+__ashlsi3_table:
+        .word   __ashlsi3_0
+        .word   __ashlsi3_1
+        .word   __ashlsi3_2
+        .word   __ashlsi3_3
+        .word   __ashlsi3_4
+        .word   __ashlsi3_5
+        .word   __ashlsi3_6
+        .word   __ashlsi3_7
+        .word   __ashlsi3_8
+        .word   __ashlsi3_9
+        .word   __ashlsi3_10
+        .word   __ashlsi3_11
+        .word   __ashlsi3_12
+        .word   __ashlsi3_13
+        .word   __ashlsi3_14
+        .word   __ashlsi3_15
+        .word   __ashlsi3_16
+        .word   __ashlsi3_17
+        .word   __ashlsi3_18
+        .word   __ashlsi3_19
+        .word   __ashlsi3_20
+        .word   __ashlsi3_21
+        .word   __ashlsi3_22
+        .word   __ashlsi3_23
+        .word   __ashlsi3_24
+        .word   __ashlsi3_25
+        .word   __ashlsi3_26
+        .word   __ashlsi3_27
+        .word   __ashlsi3_28
+        .word   __ashlsi3_29
+        .word   __ashlsi3_30
+        .word   __ashlsi3_31
+        
+/* Logical right shift */
+        
+        .text
+        
+        .global __lshrsi3
+        .type __lshrsi3,@function
+        .align 4
+        
+__lshrsi3:
+        /* Only use 5 LSBs, as that's all the h/w shifter uses */
+        andi    r2, r2, 0x1f
+        /* Get address of offset into unrolled shift loop to jump to */
+#ifdef __PIC__
+        orhi    r3, r0, gotoffhi16(__lshrsi3_table)        
+        addi    r3, r3, gotofflo16(__lshrsi3_table)
+        add     r3, r3, gp
+#else
+        mvhi    r3, hi(__lshrsi3_table)
+        ori     r3, r3, lo(__lshrsi3_table)
+#endif
+        add     r2, r2, r2
+        add     r2, r2, r2
+        add     r3, r3, r2
+        lw      r3, (r3+0)
+        b       r3        
+        
+__lshrsi3_31:        
+        srui    r1, r1, 1
+__lshrsi3_30:        
+        srui    r1, r1, 1
+__lshrsi3_29:        
+        srui    r1, r1, 1
+__lshrsi3_28:        
+        srui    r1, r1, 1
+__lshrsi3_27:        
+        srui    r1, r1, 1
+__lshrsi3_26:        
+        srui    r1, r1, 1
+__lshrsi3_25:        
+        srui    r1, r1, 1
+__lshrsi3_24:        
+        srui    r1, r1, 1
+__lshrsi3_23:        
+        srui    r1, r1, 1
+__lshrsi3_22:        
+        srui    r1, r1, 1
+__lshrsi3_21:        
+        srui    r1, r1, 1
+__lshrsi3_20:        
+        srui    r1, r1, 1
+__lshrsi3_19:        
+        srui    r1, r1, 1
+__lshrsi3_18:        
+        srui    r1, r1, 1
+__lshrsi3_17:        
+        srui    r1, r1, 1
+__lshrsi3_16:        
+        srui    r1, r1, 1
+__lshrsi3_15:        
+        srui    r1, r1, 1
+__lshrsi3_14:        
+        srui    r1, r1, 1
+__lshrsi3_13:        
+        srui    r1, r1, 1
+__lshrsi3_12:        
+        srui    r1, r1, 1
+__lshrsi3_11:        
+        srui    r1, r1, 1
+__lshrsi3_10:        
+        srui    r1, r1, 1
+__lshrsi3_9:        
+        srui    r1, r1, 1
+__lshrsi3_8:        
+        srui    r1, r1, 1
+__lshrsi3_7:        
+        srui    r1, r1, 1
+__lshrsi3_6:        
+        srui    r1, r1, 1
+__lshrsi3_5:        
+        srui    r1, r1, 1
+__lshrsi3_4:        
+        srui    r1, r1, 1
+__lshrsi3_3:        
+        srui    r1, r1, 1
+__lshrsi3_2:        
+        srui    r1, r1, 1
+__lshrsi3_1:        
+        srui    r1, r1, 1
+__lshrsi3_0:        
+        ret
+        
+#ifdef __PIC__
+        .section .data
+#else
+        .section .rodata
+#endif        
+
+        .align 4
+
+__lshrsi3_table:        
+        .word   __lshrsi3_0        
+        .word   __lshrsi3_1        
+        .word   __lshrsi3_2        
+        .word   __lshrsi3_3        
+        .word   __lshrsi3_4        
+        .word   __lshrsi3_5        
+        .word   __lshrsi3_6        
+        .word   __lshrsi3_7        
+        .word   __lshrsi3_8        
+        .word   __lshrsi3_9        
+        .word   __lshrsi3_10        
+        .word   __lshrsi3_11        
+        .word   __lshrsi3_12        
+        .word   __lshrsi3_13        
+        .word   __lshrsi3_14        
+        .word   __lshrsi3_15        
+        .word   __lshrsi3_16        
+        .word   __lshrsi3_17        
+        .word   __lshrsi3_18        
+        .word   __lshrsi3_19        
+        .word   __lshrsi3_20        
+        .word   __lshrsi3_21        
+        .word   __lshrsi3_22        
+        .word   __lshrsi3_23        
+        .word   __lshrsi3_24        
+        .word   __lshrsi3_25        
+        .word   __lshrsi3_26        
+        .word   __lshrsi3_27        
+        .word   __lshrsi3_28
+        .word   __lshrsi3_29        
+        .word   __lshrsi3_30        
+        .word   __lshrsi3_31        
+        
+/* Arithmetic right shift */
+
+        .text
+        
+        .global __ashrsi3
+        .type __ashrsi3,@function
+        .align 4
+        
+__ashrsi3:
+        /* Only use 5 LSBs, as that's all the h/w shifter uses */
+        andi    r2, r2, 0x1f
+        /* Get address of offset into unrolled shift loop to jump to */
+#ifdef __PIC__
+        orhi    r3, r0, gotoffhi16(__ashrsi3_table)
+        addi    r3, r3, gotofflo16(__ashrsi3_table)
+        add     r3, r3, gp
+#else
+        mvhi    r3, hi(__ashrsi3_table)
+        ori     r3, r3, lo(__ashrsi3_table)
+#endif
+        add     r2, r2, r2
+        add     r2, r2, r2
+        add     r3, r3, r2
+        lw      r3, (r3+0)
+        b       r3        
+        
+__ashrsi3_31:
+        sri     r1, r1, 1
+__ashrsi3_30:
+        sri     r1, r1, 1
+__ashrsi3_29:
+        sri     r1, r1, 1
+__ashrsi3_28:
+        sri     r1, r1, 1
+__ashrsi3_27:
+        sri     r1, r1, 1
+__ashrsi3_26:
+        sri     r1, r1, 1
+__ashrsi3_25:
+        sri     r1, r1, 1
+__ashrsi3_24:
+        sri     r1, r1, 1
+__ashrsi3_23:
+        sri     r1, r1, 1
+__ashrsi3_22:
+        sri     r1, r1, 1
+__ashrsi3_21:
+        sri     r1, r1, 1
+__ashrsi3_20:
+        sri     r1, r1, 1
+__ashrsi3_19:
+        sri     r1, r1, 1
+__ashrsi3_18:
+        sri     r1, r1, 1
+__ashrsi3_17:
+        sri     r1, r1, 1
+__ashrsi3_16:
+        sri     r1, r1, 1
+__ashrsi3_15:
+        sri     r1, r1, 1
+__ashrsi3_14:
+        sri     r1, r1, 1
+__ashrsi3_13:
+        sri     r1, r1, 1
+__ashrsi3_12:
+        sri     r1, r1, 1
+__ashrsi3_11:
+        sri     r1, r1, 1
+__ashrsi3_10:
+        sri     r1, r1, 1
+__ashrsi3_9:
+        sri     r1, r1, 1
+__ashrsi3_8:
+        sri     r1, r1, 1
+__ashrsi3_7:
+        sri     r1, r1, 1
+__ashrsi3_6:
+        sri     r1, r1, 1
+__ashrsi3_5:
+        sri     r1, r1, 1
+__ashrsi3_4:
+        sri     r1, r1, 1
+__ashrsi3_3:
+        sri     r1, r1, 1
+__ashrsi3_2:
+        sri     r1, r1, 1
+__ashrsi3_1:
+        sri     r1, r1, 1
+__ashrsi3_0:
+        ret
+        
+#ifdef __PIC__
+        .section .data
+#else
+        .section .rodata
+#endif        
+
+        .align 4
+
+__ashrsi3_table:
+        .word   __ashrsi3_0
+        .word   __ashrsi3_1
+        .word   __ashrsi3_2
+        .word   __ashrsi3_3
+        .word   __ashrsi3_4
+        .word   __ashrsi3_5
+        .word   __ashrsi3_6
+        .word   __ashrsi3_7
+        .word   __ashrsi3_8
+        .word   __ashrsi3_9
+        .word   __ashrsi3_10
+        .word   __ashrsi3_11
+        .word   __ashrsi3_12
+        .word   __ashrsi3_13
+        .word   __ashrsi3_14
+        .word   __ashrsi3_15
+        .word   __ashrsi3_16
+        .word   __ashrsi3_17
+        .word   __ashrsi3_18
+        .word   __ashrsi3_19
+        .word   __ashrsi3_20
+        .word   __ashrsi3_21
+        .word   __ashrsi3_22
+        .word   __ashrsi3_23
+        .word   __ashrsi3_24
+        .word   __ashrsi3_25
+        .word   __ashrsi3_26
+        .word   __ashrsi3_27
+        .word   __ashrsi3_28
+        .word   __ashrsi3_29
+        .word   __ashrsi3_30
+        .word   __ashrsi3_31
+        
diff -Naur gcc-4.4.2.orig/gcc/config/lm32/lm32.c gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/lm32.c
--- gcc-4.4.2.orig/gcc/config/lm32/lm32.c	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/lm32.c	2009-10-15 18:36:00.000000000 +0200
@@ -0,0 +1,869 @@
+/* Subroutines used for code generation on the Lattice Mico32 architecture.
+   Contributed by Jon Beniston <jon@beniston.com>
+
+   Copyright (C) 2008 Free Software Foundation, Inc.
+
+   This file is part of GCC.
+
+   GCC is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published
+   by the Free Software Foundation; either version 3, or (at your
+   option) any later version.
+
+   GCC is distributed in the hope that it will be useful, but WITHOUT
+   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+   License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GCC; see the file COPYING3.  If not see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "rtl.h"
+#include "regs.h"
+#include "hard-reg-set.h"
+#include "basic-block.h"
+#include "real.h"
+#include "insn-config.h"
+#include "conditions.h"
+#include "insn-flags.h"
+#include "insn-attr.h"
+#include "insn-codes.h"
+#include "recog.h"
+#include "output.h"
+#include "tree.h"
+#include "expr.h"
+#include "flags.h"
+#include "reload.h"
+#include "tm_p.h"
+#include "function.h"
+#include "toplev.h"
+#include "optabs.h"
+#include "libfuncs.h"
+#include "ggc.h"
+#include "target.h"
+#include "target-def.h"
+#include "langhooks.h"
+#include "tm-constrs.h"
+#include "df.h"
+
+struct lm32_frame_info
+{
+  HOST_WIDE_INT total_size;      /* number of bytes that the entire frame takes up.  */
+  HOST_WIDE_INT callee_size;     /* number of bytes to save callee save registers  */
+  HOST_WIDE_INT pretend_size;    /* number of bytes we push and pretend caller did.  */
+  HOST_WIDE_INT args_size;       /* number of bytes that outgoing arguments take up.  */
+  HOST_WIDE_INT locals_size;     /* number of bytes that local variables take up.  */
+  unsigned int reg_save_mask;   /* mask of saved registers.  */
+};
+
+/* Prototypes for static functions */
+static rtx emit_add (rtx dest, rtx src0, rtx src1);
+static void expand_save_restore (struct lm32_frame_info *info, int op);
+static void abort_with_insn (rtx insn, const char *reason);
+static void stack_adjust (HOST_WIDE_INT amount);
+static bool lm32_in_small_data_p (const_tree);
+static void lm32_setup_incoming_varargs (CUMULATIVE_ARGS *cum, enum machine_mode mode, 
+                             tree type, int *pretend_size, int no_rtl);
+
+/* Detemines if given constant can be used as a displacement */
+#define OFFSET_INT(X)  (((X) > -32768) && ((X) < 32768))
+
+#undef TARGET_ADDRESS_COST
+#define TARGET_ADDRESS_COST hook_int_rtx_bool_0
+#undef TARGET_IN_SMALL_DATA_P
+#define TARGET_IN_SMALL_DATA_P lm32_in_small_data_p
+#undef TARGET_PROMOTE_FUNCTION_ARGS
+#define TARGET_PROMOTE_FUNCTION_ARGS hook_bool_const_tree_true
+#undef TARGET_PROMOTE_FUNCTION_RETURN
+#define TARGET_PROMOTE_FUNCTION_RETURN hook_bool_const_tree_true
+#undef TARGET_SETUP_INCOMING_VARARGS
+#define TARGET_SETUP_INCOMING_VARARGS lm32_setup_incoming_varargs
+#undef TARGET_PROMOTE_PROTOTYPES
+#define TARGET_PROMOTE_PROTOTYPES hook_bool_const_tree_true
+
+struct gcc_target targetm = TARGET_INITIALIZER;
+
+/* Current frame information calculated by lm32_compute_frame_size.  */
+static struct lm32_frame_info current_frame_info;
+
+rtx lm32_compare_op0;
+rtx lm32_compare_op1;
+
+/* Return non-zero if the specified return type should be returned in memory */
+int
+lm32_return_in_memory (tree type)
+{
+  HOST_WIDE_INT size;
+
+  if (!AGGREGATE_TYPE_P (type))
+    {
+      /* All simple types are returned in registers.  */
+      return 0;
+    }
+
+  size = int_size_in_bytes (type);
+  if (size >=0 && size <= UNITS_PER_WORD)
+    {
+      /* If it can fit in one register */
+      return 0;
+    }
+  
+  return 1;
+}
+ 
+/* Determine if given constant can be used as a register displacement */
+int
+const_ok_for_base_offset (rtx op, enum machine_mode mode ATTRIBUTE_UNUSED)
+{
+  int val;
+
+  val = INTVAL (op);
+  return OFFSET_INT (val);
+}
+
+/* Generate an emit a word sized add instruction */
+static rtx
+emit_add (rtx dest, rtx src0, rtx src1)
+{
+  rtx insn;
+  insn = emit_insn (gen_addsi3 (dest, src0, src1));
+  return insn;
+}
+
+/* Generate the code to compare (and possibly branch) two integer values
+   TEST_CODE is the comparison code we are trying to emulate 
+     (or implement directly)
+   RESULT is where to store the result of the comparison, 
+     or null to emit a branch
+   CMP0 CMP1 are the two comparison operands
+   DESTINATION is the destination of the branch, or null to only compare
+   */
+
+void
+gen_int_relational (enum rtx_code code, /* relational test (EQ, etc) */
+		    rtx result,		/* result to store comp. or 0 if branch */
+		    rtx cmp0,		/* first operand to compare */
+		    rtx cmp1,		/* second operand to compare */
+		    rtx destination)	/* destination of the branch, or 0 if compare */
+{
+  enum machine_mode mode;
+  int branch_p;
+
+  mode = GET_MODE (cmp0);
+  if (mode == VOIDmode)
+    mode = GET_MODE (cmp1);
+
+  /* Is this a branch or compare */
+  branch_p = (destination != 0);
+
+  /* Instruction set doesn't support LE or LT, so swap operands and use GE, GT */
+  switch (code)
+    {
+      case LE: 
+      case LT: 
+      case LEU: 
+      case LTU:
+        code = swap_condition (code);
+        rtx temp = cmp0;
+        cmp0 = cmp1;
+        cmp1 = temp;       
+        break;
+      default:
+        break;  
+    }
+    
+  if (branch_p)
+    {
+      rtx insn;
+      
+      /* Operands must be in registers */
+      if (!register_operand (cmp0, mode)) 
+        cmp0 = force_reg (mode, cmp0);
+      if (!register_operand (cmp1, mode)) 
+        cmp1 = force_reg (mode, cmp1);
+
+      /* Generate conditional branch instruction */           
+      rtx cond = gen_rtx_fmt_ee (code, mode, cmp0, cmp1);
+      rtx label = gen_rtx_LABEL_REF (VOIDmode, destination);
+      insn = gen_rtx_SET (VOIDmode, pc_rtx,
+            gen_rtx_IF_THEN_ELSE (VOIDmode,
+      			    cond, label, pc_rtx));
+      emit_jump_insn (insn);
+    }
+  else
+    {    
+      /* We can't have const_ints in cmp0, other than 0 */
+      if ((GET_CODE (cmp0) == CONST_INT) && (INTVAL (cmp0) != 0)) 
+        cmp0 = force_reg (mode, cmp0);
+    
+      /* If the comparison is against an int not in legal range
+         move it into a register */
+      if (GET_CODE (cmp1) == CONST_INT)
+        {
+          HOST_WIDE_INT value = INTVAL (cmp1);
+          switch (code) 
+            {
+              case EQ: case NE: case LE: case LT: case GE: case GT: 
+                if (!MEDIUM_INT(value))
+                  cmp1 = force_reg (mode, cmp1);
+                break;
+              case LEU: case LTU: case GEU: case GTU:
+                if (!MEDIUM_UINT(value))
+                  cmp1 = force_reg (mode, cmp1);
+                break;
+              default:
+                abort ();
+            }    
+        }
+    
+      /* Generate compare instruction */
+      emit_move_insn (result, gen_rtx_fmt_ee (code, mode, cmp0, cmp1));
+    }
+}
+
+/* Generate and emit RTL to save or restore callee save registers */
+static void
+expand_save_restore (struct lm32_frame_info *info, int op)
+{
+  unsigned int reg_save_mask = info->reg_save_mask;
+  int regno;
+  HOST_WIDE_INT offset;
+  rtx insn;
+
+  /* Callee saves are below locals and above outgoing arguments */
+  offset = info->args_size + info->callee_size;
+  for (regno = 0; regno <= 31; regno++)
+    {
+      if ((reg_save_mask & (1 << regno)) != 0)
+        {
+          if (op == 0)
+            {
+              insn = emit_move_insn (gen_rtx_MEM (word_mode, 
+                                                  gen_rtx_PLUS (Pmode,
+                                                                stack_pointer_rtx,
+                                                                GEN_INT (offset))), 
+                                     gen_rtx_REG (word_mode, regno));
+            }
+          else
+            {
+              insn = emit_move_insn (gen_rtx_REG (word_mode, regno),
+                                     gen_rtx_MEM (word_mode, 
+                                                  gen_rtx_PLUS (Pmode,
+                                                                stack_pointer_rtx,
+                                                                GEN_INT (offset))));
+            }
+
+	  /* only prologue instructions which set the sp fp or save a
+	     register should be marked as frame related */
+          if (op==0)
+	    RTX_FRAME_RELATED_P (insn) = 1;
+          offset -= UNITS_PER_WORD;
+        }
+    }
+}
+
+static void 
+stack_adjust (HOST_WIDE_INT amount)
+{
+  rtx insn;
+  
+  if (!MEDIUM_INT (amount))
+    {
+      /* r10 is caller saved so it can be used as a temp reg */
+      rtx r10;
+      r10 = gen_rtx_REG (word_mode, 10);  
+      insn = emit_move_insn (r10, GEN_INT (amount));
+      if (amount < 0)
+	RTX_FRAME_RELATED_P (insn) = 1;
+      insn = emit_add (stack_pointer_rtx, stack_pointer_rtx, r10);
+      if (amount < 0)
+	RTX_FRAME_RELATED_P (insn) = 1;
+    }
+  else
+    {
+      insn = emit_add (stack_pointer_rtx,
+                       stack_pointer_rtx,
+                       GEN_INT (amount));
+      if (amount < 0)
+	RTX_FRAME_RELATED_P (insn) = 1;
+    }
+}
+
+
+/* Create and emit instructions for a functions prologue */
+void
+lm32_expand_prologue (void)
+{
+  rtx insn;
+    
+  lm32_compute_frame_size (get_frame_size ());
+        
+  if (current_frame_info.total_size > 0)
+    {
+      /* Add space on stack new frame  */
+      stack_adjust (-current_frame_info.total_size);
+                                
+      /* Save callee save registers */
+      if (current_frame_info.reg_save_mask != 0)
+        expand_save_restore (&current_frame_info, 0);
+        
+      /* Setup frame pointer if it's needed */                
+      if (frame_pointer_needed == 1)
+        {
+          /* Load offset - Don't use total_size, as that includes pretend_size, which isn't part of this frame? */
+          insn = emit_move_insn (frame_pointer_rtx, GEN_INT (  current_frame_info.args_size 
+                                                             + current_frame_info.callee_size 
+                                                             + current_frame_info.locals_size));
+          RTX_FRAME_RELATED_P (insn) = 1;
+          
+          /* Add in sp */
+          insn = emit_add (frame_pointer_rtx, 
+                           frame_pointer_rtx,
+                           stack_pointer_rtx);
+          RTX_FRAME_RELATED_P (insn) = 1;
+        }  
+                
+      /* Prevent prologue from being scheduled into function body */
+      emit_insn (gen_blockage ());        
+    }
+}
+
+/* Create an emit instructions for a functions epilogue */
+void
+lm32_expand_epilogue (void)
+{
+  rtx ra_rtx = gen_rtx_REG (Pmode, RA_REGNUM);
+    
+  lm32_compute_frame_size (get_frame_size ());
+
+  if (current_frame_info.total_size > 0)
+    {       
+      /* Prevent stack code from being reordered */
+      emit_insn (gen_blockage ());             
+           
+      /* Restore callee save registers */
+      if (current_frame_info.reg_save_mask != 0)
+        expand_save_restore (&current_frame_info, 1);         
+      
+      /* Deallocate stack */
+      stack_adjust (current_frame_info.total_size);
+
+      /* Return to calling function */
+      emit_jump_insn (gen_return_internalsi (ra_rtx));                    
+    }
+  else
+    {
+      /* Return to calling function */
+      emit_jump_insn (gen_return_internalsi (ra_rtx));
+    }    
+}
+
+/* Return the bytes needed to compute the frame pointer from the current
+   stack pointer. */
+HOST_WIDE_INT
+lm32_compute_frame_size (int size)
+{
+  int regno;
+  HOST_WIDE_INT total_size, locals_size, args_size, pretend_size, callee_size;
+  unsigned int reg_save_mask;
+
+  locals_size = size;
+  args_size = crtl->outgoing_args_size;
+  pretend_size = crtl->args.pretend_args_size;
+  callee_size = 0;
+  reg_save_mask = 0;
+    
+  /* Build mask that actually determines which regsiters we save
+     and calculate size required to store them in the stack. */
+  for (regno = 1; regno < SP_REGNUM; regno++)
+    {
+      if (df_regs_ever_live_p(regno) && !call_used_regs[regno])
+        {
+          reg_save_mask |= 1 << regno;
+          callee_size += UNITS_PER_WORD;
+        }
+    }
+  if (df_regs_ever_live_p(RA_REGNUM) || !current_function_is_leaf || !optimize)
+    {
+      reg_save_mask |= 1 << RA_REGNUM;       
+      callee_size += UNITS_PER_WORD;
+    }
+  if (!(reg_save_mask & (1 << FP_REGNUM)) && frame_pointer_needed)
+    {
+      reg_save_mask |= 1 << FP_REGNUM;       
+      callee_size += UNITS_PER_WORD;
+    }
+
+  /* Compute total frame size */
+  total_size = pretend_size + args_size + locals_size + callee_size;
+     
+  /* Align frame to appropriate boundary */
+  total_size = (total_size+3) & ~3;
+  
+  /* Save computed information.  */
+  current_frame_info.total_size = total_size;
+  current_frame_info.callee_size = callee_size;
+  current_frame_info.pretend_size = pretend_size;
+  current_frame_info.locals_size = locals_size;
+  current_frame_info.args_size = args_size;
+  current_frame_info.reg_save_mask = reg_save_mask;
+
+  return total_size;
+}
+
+void
+lm32_print_operand (FILE *file, rtx op, int letter)
+{
+  register enum rtx_code code;
+
+  if (! op)
+    {
+      error ("PRINT_OPERAND null pointer");
+      abort ();
+    }
+
+  code = GET_CODE (op);
+
+  if (code == SIGN_EXTEND)
+    op = XEXP (op, 0), code = GET_CODE (op);
+  else if (code == REG || code == SUBREG)
+    {
+      int regnum;
+
+      if (code == REG)
+        regnum = REGNO (op);
+      else
+        regnum = true_regnum (op);
+
+     if (   (letter == 'H' && !WORDS_BIG_ENDIAN) 
+         || (letter == 'L' && WORDS_BIG_ENDIAN))
+         {
+         abort();
+            regnum++;
+            }
+
+      fprintf (file, "%s", reg_names[regnum]);
+    }
+  else if (code == MEM) 
+      output_address (XEXP (op, 0));
+  else if (letter == 'z' && GET_CODE (op) == CONST_INT && INTVAL (op) == 0)
+    fprintf (file, "%s", reg_names[0]);
+  else if (GET_CODE (op) == CONST_DOUBLE) 
+    {
+      if ((CONST_DOUBLE_LOW (op) != 0) || (CONST_DOUBLE_HIGH (op) != 0))
+        output_operand_lossage ("Only 0.0 can be loaded as an immediate");
+      else
+        fprintf (file, "0");
+    }        
+  else if (code == EQ)
+    fprintf (file, "e  ");  
+  else if (code == NE)
+    fprintf (file, "ne ");        
+  else if (code == GT)
+    fprintf (file, "g  ");    
+  else if (code == GTU)
+    fprintf (file, "gu ");    
+  else if (code == LT)
+    fprintf (file, "l  ");        
+  else if (code == LTU)
+    fprintf (file, "lu ");        
+  else if (code == GE)
+    fprintf (file, "ge ");        
+  else if (code == GEU)
+    fprintf (file, "geu");        
+  else if (code == LE)
+    fprintf (file, "le ");        
+  else if (code == LEU)
+    fprintf (file, "leu");                  
+  else
+    output_addr_const (file, op);
+}
+
+/* A C compound statement to output to stdio stream STREAM the
+   assembler syntax for an instruction operand that is a memory
+   reference whose address is ADDR.  ADDR is an RTL expression.
+
+   On some machines, the syntax for a symbolic address depends on
+   the section that the address refers to.  On these machines,
+   define the macro `ENCODE_SECTION_INFO' to store the information
+   into the `symbol_ref', and then check for it here.  */
+
+void
+lm32_print_operand_address (FILE *file, rtx addr)
+{
+  switch (GET_CODE (addr))
+    {
+    case REG:
+      fprintf (file, "(%s+0)", reg_names [REGNO (addr)]);
+      break;
+
+    case MEM:
+      output_address (XEXP (addr, 0));
+      break;
+
+    case PLUS:
+      {
+        rtx arg0 = XEXP (addr, 0);
+        rtx arg1 = XEXP (addr, 1);
+              
+        if (GET_CODE (arg0) == REG && CONSTANT_P (arg1))
+          {
+            if (GET_CODE(arg1) == CONST_INT)
+              fprintf (file, "(%s+%ld)", reg_names [REGNO (arg0)], INTVAL (arg1));
+            else
+              {
+                fprintf (file, "(%s+", reg_names [REGNO (arg0)]);
+                output_addr_const (file, arg1);
+                fprintf (file, ")");
+              }
+          }
+        else if (CONSTANT_P (arg0) && CONSTANT_P (arg1))
+          output_addr_const (file, addr);
+        else
+          abort_with_insn (addr, "bad operand");
+      }
+      break;
+    
+    case SYMBOL_REF:
+      if (SYMBOL_REF_SMALL_P (addr)) 
+        {        
+          fprintf (file, "gp(");
+          output_addr_const (file, addr);
+          fprintf (file, ")");
+        } 
+      else
+        abort_with_insn (addr, "can't use non gp relative absolute address");
+      break;      
+        
+    default:
+      abort_with_insn (addr, "invalid addressing mode");
+      break;
+    }
+}
+
+/* Determine where to put an argument to a function.
+   Value is zero to push the argument on the stack,
+   or a hard register in which to store the argument.
+
+   MODE is the argument's machine mode.
+   TYPE is the data type of the argument (as a tree).
+    This is null for libcalls where that information may
+    not be available.
+   CUM is a variable of type CUMULATIVE_ARGS which gives info about
+    the preceding args and about the function being called.
+   NAMED is nonzero if this argument is a named parameter
+    (otherwise it is an extra parameter matching an ellipsis).  */
+
+rtx
+lm32_function_arg (CUMULATIVE_ARGS cum, enum machine_mode mode, 
+                   tree type, int named)
+{        
+  if (mode == VOIDmode)
+    /* Compute operand 2 of the call insn.  */
+    return GEN_INT (0);
+
+  if (targetm.calls.must_pass_in_stack (mode, type))
+    return NULL_RTX;
+    
+  if (!named  || (cum + LM32_NUM_REGS2(mode, type) > LM32_NUM_ARG_REGS))
+    return NULL_RTX;
+
+  return gen_rtx_REG (mode, cum + LM32_FIRST_ARG_REG);
+}
+
+HOST_WIDE_INT
+lm32_compute_initial_elimination_offset (int from, int to)
+{
+  HOST_WIDE_INT offset = 0;
+  
+  switch (from)
+    {
+    /*case FRAME_POINTER_REGNUM: - Same as ARG_POINTER_REGNUM */
+    case ARG_POINTER_REGNUM:
+      switch (to)
+        {
+        case FRAME_POINTER_REGNUM:
+          offset = 0;
+          break;
+        case STACK_POINTER_REGNUM:
+          offset = lm32_compute_frame_size (get_frame_size ()) - current_frame_info.pretend_size;
+          break;
+        default:
+          abort ();
+        }
+      break;
+    default:
+      abort ();
+    }
+    
+  return offset;    
+}
+
+static void
+lm32_setup_incoming_varargs (CUMULATIVE_ARGS *cum, enum machine_mode mode, 
+                             tree type, int *pretend_size, int no_rtl)
+{
+  int first_anon_arg;
+  tree fntype;
+  int stdarg_p;
+  
+  fntype = TREE_TYPE (current_function_decl);
+  stdarg_p = (TYPE_ARG_TYPES (fntype) != 0
+	      && (TREE_VALUE (tree_last (TYPE_ARG_TYPES (fntype)))
+		  != void_type_node));
+   
+  if (stdarg_p)
+    first_anon_arg = *cum + LM32_FIRST_ARG_REG;
+  else
+    {
+      /* this is the common case, we have been passed details setup
+         for the last named argument, we want to skip over the
+         registers, if any used in passing this named paramter in
+         order to determine which is the first registers used to pass
+         anonymous arguments */
+      int size;
+
+      if (mode==BLKmode)
+        size = int_size_in_bytes (type);
+      else
+        size = GET_MODE_SIZE (mode);
+      
+      first_anon_arg = *cum + LM32_FIRST_ARG_REG + ((size + UNITS_PER_WORD - 1) / UNITS_PER_WORD);
+    }
+
+  if ((first_anon_arg < (LM32_FIRST_ARG_REG + LM32_NUM_ARG_REGS)) && !no_rtl)
+    {
+      int first_reg_offset = first_anon_arg;
+      int size = LM32_FIRST_ARG_REG + LM32_NUM_ARG_REGS - first_anon_arg;
+      rtx regblock;
+
+      regblock = gen_rtx_MEM (BLKmode,
+                              plus_constant (arg_pointer_rtx, 
+                                             FIRST_PARM_OFFSET (0)));
+      move_block_from_reg (first_reg_offset, regblock, size);
+
+      *pretend_size = size * UNITS_PER_WORD;
+    }
+}
+
+/* Abort after printing out a specific insn.  */
+static void
+abort_with_insn (rtx insn, const char *reason)
+{
+  error (reason);
+  debug_rtx (insn);
+  abort ();
+}
+
+/* Override command line options */
+void 
+lm32_override_options (void)
+{          
+  /* We must have sign-extend enabled if barrel-shift isn't */
+  if (!MASK_BARREL_SHIFT_ENABLED)
+    {
+      warning (0, "neither -mbarrel-shift-enabled nor -msign-extend-enabled specified. Assuming -msign-extend-enabled");
+      target_flags |= MASK_SIGN_EXTEND_ENABLED;
+    }
+}
+
+/* Return nonzero if this function is known to have a null epilogue.
+   This allows the optimizer to omit jumps to jumps if no stack
+   was created.  */
+int 
+lm32_can_use_return (void)
+{
+  if (!reload_completed) 
+    return 0;
+  
+  if (df_regs_ever_live_p(RA_REGNUM) || crtl->profile)
+    return 0;
+    
+  if (lm32_compute_frame_size (get_frame_size ()) != 0)
+    return 0;
+    
+  return 1;
+}
+
+/* Support function to determine the return address of the function
+   'count' frames back up the stack. */
+rtx 
+lm32_return_addr_rtx (int count, rtx frame)
+{
+  rtx r;
+  if (count == 0)
+    {
+      /* *mjs* This test originally used leaf_function_p (), we now use
+	 the regs_ever_live test which I *think* is more accurate. */
+      if (!df_regs_ever_live_p(RA_REGNUM))
+	{
+	  r = gen_rtx_REG (Pmode, RA_REGNUM);
+	}
+      else
+	{
+	  r = gen_rtx_MEM (Pmode, 
+			   gen_rtx_PLUS (Pmode, frame,
+					 GEN_INT(- 2 * UNITS_PER_WORD)));
+	  set_mem_alias_set (r, get_frame_alias_set ());
+	}
+    }
+  else if (flag_omit_frame_pointer)
+    r = NULL_RTX;
+  else
+    {
+      r = gen_rtx_MEM (Pmode, 
+		       gen_rtx_PLUS (Pmode, frame,
+				     GEN_INT(- 2 * UNITS_PER_WORD)));
+      set_mem_alias_set (r, get_frame_alias_set ());
+    }
+  return r;
+}
+
+/* Return true if EXP should be placed in the small data section.  */
+
+static bool
+lm32_in_small_data_p (const_tree exp)
+{
+  /* We want to merge strings, so we never consider them small data.  */
+  if (TREE_CODE (exp) == STRING_CST)
+    return false;
+
+  /* Functions are never in the small data area.  Duh.  */
+  if (TREE_CODE (exp) == FUNCTION_DECL)
+    return false;
+
+  if (TREE_CODE (exp) == VAR_DECL && DECL_SECTION_NAME (exp))
+    {
+      const char *section = TREE_STRING_POINTER (DECL_SECTION_NAME (exp));
+      if (strcmp (section, ".sdata") == 0
+	  || strcmp (section, ".sbss") == 0)
+	return true;
+    }
+  else
+    {
+      HOST_WIDE_INT size = int_size_in_bytes (TREE_TYPE (exp));
+
+      /* If this is an incomplete type with size 0, then we can't put it
+	 in sdata because it might be too big when completed.  */
+      if (size > 0 && (unsigned HOST_WIDE_INT) size <= g_switch_value)
+	return true;
+    }
+
+  return false;
+}
+
+/* Emit straight-line code to move LENGTH bytes from SRC to DEST.
+   Assume that the areas do not overlap.  */
+
+static void
+lm32_block_move_inline (rtx dest, rtx src, HOST_WIDE_INT length, HOST_WIDE_INT alignment)
+{
+  HOST_WIDE_INT offset, delta;
+  unsigned HOST_WIDE_INT bits;
+  int i;
+  enum machine_mode mode;
+  rtx *regs;
+
+  /* Work out how many bits to move at a time.  */
+  switch (alignment)
+    {
+      case 1:
+        bits = 8;
+        break;
+      case 2:
+        bits = 16;
+        break;
+      case 4:
+        bits = 32;
+        break;
+      default: 
+        abort ();
+    }
+
+  mode = mode_for_size (bits, MODE_INT, 0);
+  delta = bits / BITS_PER_UNIT;
+
+  /* Allocate a buffer for the temporary registers.  */
+  regs = alloca (sizeof (rtx) * length / delta);
+
+  /* Load as many BITS-sized chunks as possible.  */
+  for (offset = 0, i = 0; offset + delta <= length; offset += delta, i++)
+    {
+      regs[i] = gen_reg_rtx (mode);
+      emit_move_insn (regs[i], adjust_address (src, mode, offset));
+    }
+
+  /* Copy the chunks to the destination.  */
+  for (offset = 0, i = 0; offset + delta <= length; offset += delta, i++)
+    emit_move_insn (adjust_address (dest, mode, offset), regs[i]);
+
+  /* Mop up any left-over bytes.  */
+  if (offset < length)
+    {
+      src = adjust_address (src, BLKmode, offset);
+      dest = adjust_address (dest, BLKmode, offset);
+      move_by_pieces (dest, src, length - offset,
+		      MIN (MEM_ALIGN (src), MEM_ALIGN (dest)), 0);
+    }
+}
+
+/* Expand string/block move operations.
+
+   operands[0] is the pointer to the destination.
+   operands[1] is the pointer to the source.
+   operands[2] is the number of bytes to move.
+   operands[3] is the alignment.  */
+
+int
+lm32_expand_block_move (rtx *operands)
+{
+  if ((GET_CODE (operands[2]) == CONST_INT) && (INTVAL (operands[2]) <= 32))
+    {
+      lm32_block_move_inline (operands[0], operands[1], INTVAL (operands[2]), INTVAL (operands[3]));
+      return 1;
+    }
+  return 0;
+}
+
+/* Return TRUE if X references a SYMBOL_REF or LABEL_REF whose symbol
+   isn't protected by a PIC unspec.  */
+int
+nonpic_symbol_mentioned_p (rtx x)
+{
+  register const char *fmt;
+  register int i;
+
+  if (GET_CODE (x) == SYMBOL_REF || GET_CODE (x) == LABEL_REF
+      || GET_CODE (x) == PC)
+    return 1;
+
+  /* We don't want to look into the possible MEM location of a
+     CONST_DOUBLE, since we're not going to use it, in general.  */
+  if (GET_CODE (x) == CONST_DOUBLE)
+    return 0;
+
+  if (GET_CODE (x) == UNSPEC)
+    return 0;
+
+  fmt = GET_RTX_FORMAT (GET_CODE (x));
+  for (i = GET_RTX_LENGTH (GET_CODE (x)) - 1; i >= 0; i--)
+    {
+      if (fmt[i] == 'E')
+	{
+	  register int j;
+
+	  for (j = XVECLEN (x, i) - 1; j >= 0; j--)
+	    if (nonpic_symbol_mentioned_p (XVECEXP (x, i, j)))
+	      return 1;
+	}
+      else if (fmt[i] == 'e' && nonpic_symbol_mentioned_p (XEXP (x, i)))
+	return 1;
+    }
+
+  return 0;
+}
diff -Naur gcc-4.4.2.orig/gcc/config/lm32/lm32.h gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/lm32.h
--- gcc-4.4.2.orig/gcc/config/lm32/lm32.h	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/lm32.h	2009-10-15 18:36:00.000000000 +0200
@@ -0,0 +1,657 @@
+/* Definitions of target machine for GNU compiler, Lattice Mico32 architecture.
+   Contributed by Jon Beniston <jon@beniston.com>
+
+   Copyright (C) 2008 Free Software Foundation, Inc.
+
+   This file is part of GCC.
+
+   GCC is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published
+   by the Free Software Foundation; either version 3, or (at your
+   option) any later version.
+
+   GCC is distributed in the hope that it will be useful, but WITHOUT
+   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+   License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GCC; see the file COPYING3.  If not see
+   <http://www.gnu.org/licenses/>.  */
+
+/*-------------------------------*/
+/* Run-time Target Specification */
+/*-------------------------------*/
+
+/* Print subsidiary information on the compiler version in use.  */
+#ifndef TARGET_VERSION
+#define TARGET_VERSION fprintf (stderr, " (LatticeMico32)")
+#endif
+
+/* Target CPU builtins.  */
+#define TARGET_CPU_CPP_BUILTINS()               \
+  do                                            \
+    {                                           \
+      builtin_define ("__lm32__");              \
+      builtin_define_std ("lm32");              \
+      builtin_assert ("cpu=lm32");              \
+      builtin_assert ("machine=lm32");          \
+    }                                           \
+  while (0)
+
+#define CPP_SPEC "\
+%{mmultiply-enabled:-D__multiply_enabled__} \
+%{mdivide-enabled:-D__divide_enabled__} \
+%{mbarrel-shift-enabled:-D__barrel_shift_enabled__} \
+%{msign-extend-enabled:-D__sign_extend_enabled__} \
+%{muser-enabled:-D__user_enabled__} \
+"
+
+#undef  ASM_SPEC
+#define ASM_SPEC "\
+%{mmultiply-enabled} \
+%{mdivide-enabled} \
+%{mbarrel-shift-enabled} \
+%{msign-extend-enabled} \
+%{muser-extend-enabled} \
+%{v} \
+"
+
+/* Let link script define all link options. 
+   Default to using simulator link script.  */
+
+#undef  STARTFILE_SPEC
+#define STARTFILE_SPEC ""
+#undef  ENDFILE_SPEC
+#define ENDFILE_SPEC ""
+#undef  LIB_SPEC
+#define LIB_SPEC "%{!T*:-T sim.ld}"
+
+#define OVERRIDE_OPTIONS lm32_override_options()
+
+extern int target_flags;
+
+/* Add -G xx support.  */
+
+#undef  SWITCH_TAKES_ARG
+#define SWITCH_TAKES_ARG(CHAR) \
+(DEFAULT_SWITCH_TAKES_ARG (CHAR) || (CHAR) == 'G')
+
+#undef  CC1_SPEC
+#define CC1_SPEC "%{G*}"
+
+extern struct rtx_def *lm32_compare_op0;
+extern struct rtx_def *lm32_compare_op1;
+
+/*---------------------------------*/
+/* Target machine storage layout.  */
+/*---------------------------------*/
+
+#define BITS_BIG_ENDIAN 0
+#define BYTES_BIG_ENDIAN 1
+#define WORDS_BIG_ENDIAN 1
+#define LIBGCC2_WORDS_BIG_ENDIAN 1
+
+#define BITS_PER_UNIT 8
+#define BITS_PER_WORD 32
+#define UNITS_PER_WORD 4
+
+#define POINTER_SIZE 32
+
+#define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE)               \
+do {                                                    \
+  if (GET_MODE_CLASS (MODE) == MODE_INT                 \
+      && GET_MODE_SIZE (MODE) < UNITS_PER_WORD)         \
+    (MODE) = word_mode;                                 \
+} while (0)
+
+#define PARM_BOUNDARY 32
+
+#define STACK_BOUNDARY 32
+
+#define BIGGEST_ALIGNMENT 64
+
+#define FUNCTION_BOUNDARY  32
+
+#define EMPTY_FIELD_BOUNDARY 32
+
+#define STRICT_ALIGNMENT 1
+
+#define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
+
+/* Make strings word-aligned so strcpy from constants will be faster.  */
+#define CONSTANT_ALIGNMENT(EXP, ALIGN)  \
+  (TREE_CODE (EXP) == STRING_CST	\
+   && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
+
+/* Make arrays and structures word-aligned to allow faster copying etc.  */
+#define DATA_ALIGNMENT(TYPE, ALIGN)					\
+  ((((ALIGN) < BITS_PER_WORD)						\
+    && (TREE_CODE (TYPE) == ARRAY_TYPE					\
+	|| TREE_CODE (TYPE) == UNION_TYPE				\
+	|| TREE_CODE (TYPE) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN))
+
+/* We need this for the same reason as DATA_ALIGNMENT, namely to cause
+   character arrays to be word-aligned so that `strcpy' calls that copy
+   constants to character arrays can be done inline, and 'strcmp' can be
+   optimised to use word loads. */
+#define LOCAL_ALIGNMENT(TYPE, ALIGN) \
+  DATA_ALIGNMENT (TYPE, ALIGN)
+   
+/*----------------------------------------*/
+/* Layout of source language data types.  */
+/*----------------------------------------*/
+
+#define INT_TYPE_SIZE		    32
+#define SHORT_TYPE_SIZE		    16
+#define LONG_TYPE_SIZE		    32
+#define LONG_LONG_TYPE_SIZE	    64
+
+#define FLOAT_TYPE_SIZE		    32
+#define DOUBLE_TYPE_SIZE	    64
+#define LONG_DOUBLE_TYPE_SIZE       64
+
+#define DEFAULT_SIGNED_CHAR         0
+
+#define SIZE_TYPE "unsigned int"
+
+#define PTRDIFF_TYPE "int"
+
+/*---------------------------*/
+/* Standard register usage.  */
+/*---------------------------*/
+
+#define FIRST_PSEUDO_REGISTER  32
+
+#define RV_REGNUM   1
+#define GP_REGNUM   26
+#define FP_REGNUM   27
+#define SP_REGNUM   28
+#define RA_REGNUM   29
+
+#define G_REG_P(X)      ((X)<32)
+#define PSEUDO_REG_P(X) ((X)>=FIRST_PSEUDO_REGISTER)
+
+#define FIXED_REGISTERS   \
+{ 1, 0, 0, 0, 0, 0, 0, 0, \
+  0, 0, 0, 0, 0, 0, 0, 0, \
+  0, 0, 0, 0, 0, 0, 0, 0, \
+  0, 0, 1, 0, 1, 0, 1, 1}
+
+#define CALL_USED_REGISTERS \
+{ 1, 1, 1, 1, 1, 1, 1, 1,   \
+  1, 1, 1, 0, 0, 0, 0, 0,   \
+  0, 0, 0, 0, 0, 0, 0, 0,   \
+  0, 0, 1, 0, 1, 0, 1, 1}
+  
+#define HARD_REGNO_NREGS(REGNO, MODE)                                   \
+    ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)      
+
+#define HARD_REGNO_MODE_OK(REGNO, MODE) G_REG_P(REGNO)
+
+#define MODES_TIEABLE_P(MODE1, MODE2)           \
+(      GET_MODE_CLASS (MODE1) == MODE_INT		\
+    && GET_MODE_CLASS (MODE2) == MODE_INT		\
+    && GET_MODE_SIZE (MODE1) <= UNITS_PER_WORD	\
+    && GET_MODE_SIZE (MODE2) <= UNITS_PER_WORD)
+
+#define AVOID_CCMODE_COPIES
+
+/*----------------------------------*/
+/* Register classes and constants.  */
+/*----------------------------------*/
+
+enum reg_class {
+  NO_REGS, 
+  GENERAL_REGS,
+  ALL_REGS,
+  LIM_REG_CLASSES
+};
+
+#define N_REG_CLASSES (int) LIM_REG_CLASSES
+
+#define REG_CLASS_NAMES { "NO_REGS", "GENERAL_REGS", "ALL_REGS" }
+
+#define REG_CLASS_CONTENTS      \
+{ {0x00000000},                 \
+  {0xffffffff},                 \
+  {0xffffffff}                  \
+}
+
+#define REGNO_REG_CLASS(REGNO) \
+    (G_REG_P(REGNO) ? GENERAL_REGS : NO_REGS)
+    
+#define CLASS_MAX_NREGS(CLASS, MODE) \
+    ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)      
+    
+#define INDEX_REG_CLASS NO_REGS
+
+#define BASE_REG_CLASS GENERAL_REGS
+
+#define REG_CLASS_FROM_LETTER(C) NO_REGS
+
+#ifdef REG_OK_STRICT
+#define REGNO_OK_FOR_BASE_P(REGNO) 					\
+(G_REG_P (REGNO) || G_REG_P (reg_renumber[REGNO]))
+#else
+#define REGNO_OK_FOR_BASE_P(REGNO) 					\
+(G_REG_P (REGNO) || PSEUDO_REG_P (REGNO))
+#endif
+
+#define REGNO_OK_FOR_INDEX_P(REGNO) 0
+
+#define PREFERRED_RELOAD_CLASS(X,CLASS) (CLASS)
+
+/* The letters I, J, K, L, M, N, O, P in a register constraint string
+   can be used to stand for particular ranges of immediate operands.
+   This macro defines what the ranges are.
+   C is the letter, and VALUE is a constant value.
+   Return 1 if VALUE is in the range specified by C.  
+   
+   Lattice usage:
+   
+   J - 0
+   K - 16-bit signed
+   L - 16-bit unsigned
+   M - 32-bit signed 
+   */
+#define MEDIUM_INT(X)  ((((HOST_WIDE_INT)(X)) >= -32768) && (((HOST_WIDE_INT)(X)) < 32768))
+#define MEDIUM_UINT(X) (((unsigned HOST_WIDE_INT)(X)) < 65536)
+#define LARGE_INT(X)                                    \
+((X) >= (-(HOST_WIDE_INT) 0x7fffffff - 1)               \
+ && (X) <= (unsigned HOST_WIDE_INT) 0xffffffff)
+ 
+#define CONST_OK_FOR_LETTER_P(VALUE, C)                 \
+(  (C) == 'J' ? (VALUE) == 0                            \
+ : (C) == 'K' ? MEDIUM_INT (VALUE)                      \
+ : (C) == 'L' ? MEDIUM_UINT (VALUE)                     \
+ : (C) == 'M' ? LARGE_INT (VALUE)                       \
+ : 0                                                    \
+)
+
+#define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C)  0
+
+/*----------------------------------------*/
+/* Stack Layout and Calling Conventions.  */
+/*----------------------------------------*/
+
+#define STACK_GROWS_DOWNWARD 1
+
+#define FRAME_GROWS_DOWNWARD 1
+
+#define STACK_POINTER_OFFSET (UNITS_PER_WORD)
+
+#define STARTING_FRAME_OFFSET (UNITS_PER_WORD)
+
+#define FIRST_PARM_OFFSET(FNDECL) (UNITS_PER_WORD)
+
+#define STACK_POINTER_REGNUM SP_REGNUM
+
+#define FRAME_POINTER_REGNUM FP_REGNUM
+
+#define ARG_POINTER_REGNUM FRAME_POINTER_REGNUM
+
+#define FRAME_POINTER_REQUIRED (cfun->calls_alloca) 
+
+#define RETURN_ADDR_RTX(count, frame)                               \
+  lm32_return_addr_rtx (count, frame)
+
+/* FIXME! */
+#define STATIC_CHAIN_REGNUM 3
+
+#define ELIMINABLE_REGS \
+{{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM },        \
+ { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM },          \
+}
+
+#define CAN_ELIMINATE(FROM, TO)						    \
+   (((TO) == STACK_POINTER_REGNUM && frame_pointer_needed) ? 0 : 1)
+
+#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)    \
+  (OFFSET) = lm32_compute_initial_elimination_offset (FROM, TO)
+
+/*-----------------------------*/
+/* Function argument passing.  */
+/*-----------------------------*/
+
+#define ACCUMULATE_OUTGOING_ARGS 1
+
+#define RETURN_POPS_ARGS(DECL, FUNTYPE, SIZE) 0
+
+/*--------------------------------*/
+/* Passing Arguments in Registers */
+/*--------------------------------*/
+
+/* The first argument register */
+#define LM32_FIRST_ARG_REG 1
+
+/* The number of (integer) argument register available.  */
+#define LM32_NUM_ARG_REGS 8
+
+#define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
+  lm32_function_arg ((CUM), (MODE), (TYPE), (NAMED))
+
+#define CUMULATIVE_ARGS int
+
+#define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT,N_NAMED_ARGS) \
+  (CUM) = 0
+
+#define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
+  (CUM) += LM32_NUM_REGS2 (MODE, TYPE)
+
+#define FUNCTION_ARG_REGNO_P(r)	(((r) >= 1) && ((r) <= LM32_NUM_ARG_REGS))
+
+/*--------------------*/
+/* Function results.  */
+/*--------------------*/
+
+#define FUNCTION_VALUE(VALTYPE, FUNC)                                   \
+   gen_rtx_REG ((INTEGRAL_TYPE_P (VALTYPE)                              \
+                 && TYPE_PRECISION (VALTYPE) < BITS_PER_WORD)           \
+	            ? word_mode                                         \
+	            : TYPE_MODE (VALTYPE),				                    \
+	            RV_REGNUM)
+
+#define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, RV_REGNUM)
+
+#define FUNCTION_VALUE_REGNO_P(N) ((N) == RV_REGNUM)
+
+#define RETURN_IN_MEMORY(TYPE) lm32_return_in_memory (TYPE)
+
+#define DEFAULT_PCC_STRUCT_RETURN 0
+
+/* Convert from bytes to ints.  */
+#define LM32_NUM_INTS(X) (((X) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
+
+/* The number of (integer) registers required to hold a quantity of
+   type MODE.  */
+#define LM32_NUM_REGS(MODE) LM32_NUM_INTS (GET_MODE_SIZE (MODE))
+
+/* The number of (integer) registers required to hold a quantity of
+   TYPE MODE.  */
+#define LM32_NUM_REGS2(MODE, TYPE)                       \
+  LM32_NUM_INTS ((MODE) == BLKmode ?                     \
+  int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE))
+
+#define STRUCT_VALUE 0
+
+/*---------------------------*/
+/* Function entry and exit.  */
+/*---------------------------*/
+
+/*-------------*/
+/* Profiling.  */
+/*-------------*/
+
+#define FUNCTION_PROFILER(FILE, LABELNO)
+
+/*---------------*/
+/* Trampolines.  */
+/*---------------*/
+
+#define INITIALIZE_TRAMPOLINE	
+#define TRAMPOLINE_SIZE		0
+
+/*---------------------*/ 
+/*  Addressing Modes.  */
+/*---------------------*/ 
+
+#define CONSTANT_ADDRESS_P(X)						\
+  ((GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF		\
+    || GET_CODE (X) == CONST_INT || GET_CODE (X) == HIGH		\
+    || (GET_CODE (X) == CONST)))
+
+#define MAX_REGS_PER_ADDRESS 1
+
+#ifdef REG_OK_STRICT
+#define REG_OK_FOR_FRAME_PTR_P(X) (REGNO (X) == FRAME_POINTER_REGNUM)
+#else
+#define REG_OK_FOR_FRAME_PTR_P(X) (REGNO (X) == FRAME_POINTER_REGNUM)
+#endif
+
+#define RTX_OK_FOR_BASE_P(X)                    (REG_P (X) && REG_OK_FOR_BASE_P (X))
+#define RTX_OK_FOR_STACK_P(X)                   (REG_P (X) && (REGNO (X) == STACK_POINTER_REGNUM))
+#define CONST_OK_FOR_BASE_OFFSET(X, MODE)       const_ok_for_base_offset ((X), (MODE))
+               
+#define LEGITIMATE_BASE_INDEX_P(ADDR, MODE)                     \
+(   GET_CODE (ADDR)==PLUS                                       \
+ && RTX_OK_FOR_BASE_P (XEXP (ADDR, 0))                          \
+ && GET_CODE (XEXP (ADDR, 1)) == CONST_INT                      \
+ && CONST_OK_FOR_BASE_OFFSET (XEXP ((ADDR), 1), (MODE)))        
+
+#define LEGITIMATE_GPREL_P(ADDR)                                \
+(   GET_CODE (ADDR) == SYMBOL_REF                               \
+ && SYMBOL_REF_SMALL_P (ADDR))
+ 
+#ifdef REG_OK_STRICT
+#define REG_OK_FOR_BASE_P(X) (G_REG_P (REGNO (X)))
+#else
+#define REG_OK_FOR_BASE_P(X) (G_REG_P (REGNO (X)) || PSEUDO_REG_P (REGNO (X)))
+#endif
+
+#ifdef REG_OK_STRICT
+#define REG_OK_FOR_INDEX_P(X) (G_REG_P (REGNO (X)))
+#else
+#define REG_OK_FOR_INDEX_P(X) (G_REG_P (REGNO (X)) || PSEUDO_REG_P (REGNO (X)))
+#endif
+
+#define GO_IF_LEGITIMATE_ADDRESS(m,x,l)	                                                                                             \
+{                                                                                                                                    \
+  if (RTX_OK_FOR_BASE_P (x)) goto l;                            /* (rM) */                                                      \
+  else if (LEGITIMATE_BASE_INDEX_P (x, m)) goto l;              /* (rM)+literal) */                                            \
+  else if (LEGITIMATE_GPREL_P (x)) goto l;                                                                                      \
+}
+
+#define ARM_LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)	     \
+do {							     \
+  if (flag_pic)                                              \
+    X = lm32_legitimize_pic_address (OLDX, MODE, NULL_RTX);  \
+} while (0)
+
+#define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) 			\
+  if (GET_CODE (ADDR) == PLUS) goto LABEL;		      		\
+
+#define LEGITIMATE_CONSTANT_P(X) 1
+
+/*-------------------------*/
+/* Condition Code Status.  */
+/*-------------------------*/
+
+#define REVERSIBLE_CC_MODE(MODE) 1
+
+/*---------*/
+/* Costs.  */
+/*---------*/
+
+#define SLOW_BYTE_ACCESS 1
+
+#define NO_FUNCTION_CSE
+
+#define BRANCH_COST(speed_p, predictable_p) 4
+
+#define MOVE_RATIO(speed) (speed ? 24 : 3)
+
+/*------------*/
+/* Sections.  */
+/*------------*/
+
+#define TEXT_SECTION_ASM_OP             "\t.section\t.text"
+#define DATA_SECTION_ASM_OP             "\t.section\t.data"
+#define SDATA_SECTION_ASM_OP            "\t.section\t.sdata,\"aw\""
+#define BSS_SECTION_ASM_OP              "\t.section\t.bss"
+#define SBSS_SECTION_ASM_OP             "\t.section\t.sbss,\"aw\""
+
+/*-------*/
+/* PIC.  */
+/*-------*/
+
+#define PIC_OFFSET_TABLE_REGNUM (flag_pic ? GP_REGNUM : INVALID_REGNUM)
+
+#define JUMP_TABLES_IN_TEXT_SECTION (flag_pic)
+
+#define LEGITIMATE_PIC_OPERAND_P(X)                                    \
+	(!(nonpic_symbol_mentioned_p (X)))
+
+/*-------------*/
+/* Assembler.  */
+/*-------------*/
+
+#define ASM_COMMENT_START "#"
+
+#define ASM_APP_ON "#APP\n"
+
+#define ASM_APP_OFF "#NO_APP\n"
+
+#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)				\
+ do {									\
+	fputc ( '\t', FILE);						\
+	assemble_name (FILE, LABEL1);					\
+	fputs ( " = ", FILE);						\
+	assemble_name (FILE, LABEL2);					\
+	fputc ( '\n', FILE);						\
+ } while (0)
+
+/* Override default implementation in elfos.h to support -G.  */
+#undef  ASM_OUTPUT_ALIGNED_LOCAL
+#define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)		\
+do {									\
+  if ((SIZE) <= g_switch_value)						\
+    switch_to_section (sbss_section);					\
+  else									\
+    switch_to_section (bss_section);					\
+  ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");			\
+  if (!flag_inhibit_size_directive)					\
+    ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE);			\
+  ASM_OUTPUT_ALIGN ((FILE), exact_log2((ALIGN) / BITS_PER_UNIT));	\
+  ASM_OUTPUT_LABEL(FILE, NAME);						\
+  ASM_OUTPUT_SKIP((FILE), (SIZE) ? (SIZE) : 1);				\
+} while (0)
+
+/* Override default implementation in elfos.h to support -G.  */
+#undef  ASM_OUTPUT_ALIGNED_COMMON
+#define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)		\
+do 									\
+{									\
+  if ((SIZE) <= g_switch_value)						\
+    {									\
+      switch_to_section (sbss_section);					\
+      (*targetm.asm_out.globalize_label) (FILE, NAME);			\
+      ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");			\
+      if (!flag_inhibit_size_directive)					\
+	ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE);			\
+      ASM_OUTPUT_ALIGN ((FILE), exact_log2((ALIGN) / BITS_PER_UNIT));	\
+      ASM_OUTPUT_LABEL(FILE, NAME);					\
+      ASM_OUTPUT_SKIP((FILE), (SIZE) ? (SIZE) : 1);			\
+    }									\
+  else									\
+    {									\
+      switch_to_section (bss_section);					\
+      fprintf ((FILE), "%s", COMMON_ASM_OP);				\
+      assemble_name ((FILE), (NAME));					\
+      fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT);	\
+    }									\
+}									\
+while (0)
+
+#define ASM_OUTPUT_LABEL(FILE, NAME) \
+  do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
+
+#define ASM_OUTPUT_LABELREF(FILE,NAME)	\
+  do {					\
+    const char *xname = (NAME);		\
+    if (xname[0] == '@')		\
+      xname += 1;			\
+    if (xname[0] == '*')		\
+      xname += 1;			\
+    fputs (xname, FILE);		\
+  } while (0)
+
+#define ASM_OUTPUT_SYMBOL_REF(STREAM, SYMBOL)				\
+  do {									                    \
+    assemble_name (STREAM, XSTR (SYMBOL, 0));				\
+  } while (0)
+
+#define GLOBAL_ASM_OP "\t.global\t"
+
+#define REGISTER_NAMES 					 \
+{                                                        \
+ "r0",  "r1",  "r2",  "r3",  "r4",  "r5",  "r6",  "r7",	 \
+ "r8",  "r9",  "r10", "r11", "r12", "r13", "r14", "r15", \
+ "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
+ "r24", "r25",  "gp",  "fp",  "sp",  "ra",  "ea",  "ba"}
+
+#define PRINT_OPERAND_PUNCT_VALID_P(CHAR) \
+  (((CHAR) == '&') || ((CHAR) == '@') || ((CHAR) == '*'))
+
+#define PRINT_OPERAND(FILE, X, CODE)                    \
+  lm32_print_operand (FILE, X, CODE)
+
+#define PRINT_OPERAND_ADDRESS(FILE, ADDR) 				\
+  lm32_print_operand_address (FILE, ADDR)
+
+#ifndef LOCAL_LABEL_PREFIX
+#define LOCAL_LABEL_PREFIX	"."
+#endif
+
+#define ASM_OUTPUT_ALIGN(FILE,LOG) 					\
+  do { if ((LOG) != 0) fprintf (FILE, "\t.align %d\n", (1 << (LOG))); } while (0)
+
+#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)                    \
+do {                                                            \
+  char label[64];                                               \
+  ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE);              \
+  fprintf (FILE, "\n\t.word\t");                                \
+  assemble_name (FILE, label);                                  \
+  fprintf (FILE, "\n");                                         \
+} while (0)
+
+#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL)        \
+do {                                                            \
+  char label[64];                                               \
+  fprintf (FILE, "\t.word\t(");                                 \
+  ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE);		\
+  assemble_name (FILE, label);                                  \
+  fprintf (FILE, "-");                                          \
+  ASM_GENERATE_INTERNAL_LABEL (label, "L", REL);                \
+  assemble_name (FILE, label);                                  \
+  fprintf (FILE, ")\n");                                        \
+} while (0)
+
+/*-------------*/
+/* Debugging.  */
+/*-------------*/
+
+#define DBX_REGISTER_NUMBER(REGNO) (REGNO) 
+
+#define CAN_DEBUG_WITHOUT_FP
+     
+#define DEFAULT_GDB_EXTENSIONS 1
+
+/*--------*/
+/* Misc.  */
+/*--------*/
+
+#define CASE_VECTOR_MODE Pmode
+
+#define WORD_REGISTER_OPERATIONS
+
+#define LOAD_EXTEND_OP(MODE) ZERO_EXTEND
+
+#define SHORT_IMMEDIATES_SIGN_EXTEND
+
+#define MOVE_MAX        UNITS_PER_WORD
+#define MAX_MOVE_MAX    4
+
+#define SHIFT_COUNT_TRUNCATED 1
+
+#define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
+
+#define Pmode SImode
+
+#define FUNCTION_MODE SImode
+
+#ifndef NO_IMPLICIT_EXTERN_C
+#define NO_IMPLICIT_EXTERN_C
+#endif
+
+#define STORE_FLAG_VALUE 1
diff -Naur gcc-4.4.2.orig/gcc/config/lm32/lm32.md gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/lm32.md
--- gcc-4.4.2.orig/gcc/config/lm32/lm32.md	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/lm32.md	2009-10-15 18:36:00.000000000 +0200
@@ -0,0 +1,1233 @@
+;; Machine description of the Lattice Mico32 architecture for GNU C compiler.
+;; Contributed by Jon Beniston <jon@beniston.com>
+
+;; This file is part of GCC.
+
+;; GCC is free software; you can redistribute it and/or modify it
+;; under the terms of the GNU General Public License as published
+;; by the Free Software Foundation; either version 3, or (at your
+;; option) any later version.
+
+;; GCC is distributed in the hope that it will be useful, but WITHOUT
+;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+;; or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+;; License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GCC; see the file COPYING3.  If not see
+;; <http://www.gnu.org/licenses/>.  
+
+;; Include predicate definitions
+(include "predicates.md")
+
+;; Register numbers
+(define_constants
+  [(RA_REGNUM           29)		; return address register.
+  ]
+)
+
+;; LM32 specific volatile operations
+(define_constants
+  [(UNSPECV_BLOCKAGE    1)]     ; use to prevent scheduler from optimising accross bounaries
+)
+
+;; LM32 specific operations
+(define_constants
+  [(UNSPEC_GOT          2)
+   (UNSPEC_GOTOFF_HI16  3)
+   (UNSPEC_GOTOFF_LO16  4)]     
+)
+
+;; --------------------------------- 
+;;      instruction types
+;; ---------------------------------
+
+(define_attr "type"
+  "unknown,load,store,arith,compare,shift,multiply,divide,call,icall,ubranch,uibranch,cbranch"
+  (const_string "unknown"))
+  
+;; ---------------------------------
+;;      instruction lengths
+;; ---------------------------------
+  
+; All instructions are 4 bytes
+; Except for branches that are out of range, and have to be implemented
+; as two instructions
+(define_attr "length" "" 
+        (cond [
+                (eq_attr "type" "cbranch")
+                (if_then_else
+                        (lt (abs (minus (match_dup 2) (pc)))
+                                (const_int 32768)
+                        )
+                        (const_int 4)
+                        (const_int 8)               
+                )
+              ] 
+        (const_int 4))
+)
+                    
+;; ---------------------------------
+;;           scheduling 
+;; ---------------------------------
+
+(define_automaton "lm32")
+
+(define_cpu_unit "x" "lm32")
+(define_cpu_unit "m" "lm32")
+(define_cpu_unit "w" "lm32")
+
+(define_insn_reservation "singlecycle" 1
+  (eq_attr "type" "store,arith,call,icall,ubranch,uibranch,cbranch")
+ "x")
+
+(define_insn_reservation "twocycle" 2
+  (eq_attr "type" "compare,shift,divide")
+ "x,m") 
+
+(define_insn_reservation "threecycle" 3
+  (eq_attr "type" "load,multiply")
+ "x,m,w")
+
+;; ---------------------------------
+;;               mov 
+;; ---------------------------------
+
+(define_expand "movqi"
+  [(set (match_operand:QI 0 "general_operand" "")
+        (match_operand:QI 1 "general_operand" ""))]
+  ""
+  "
+{
+  if (can_create_pseudo_p ())
+    {
+      if (GET_CODE (operand0) == MEM)
+        {
+          /* Source operand for store must be in a register */
+          operands[1] = force_reg (QImode, operands[1]);
+        }
+    }
+  if (   GET_CODE (operands[1]) == CONST_INT 
+      && GET_CODE (operands[0]) == REG)
+    {
+      operands[0] = gen_rtx_SUBREG (SImode, operands[0], 0);
+      emit_insn (gen_movsi (operands[0], operands[1]));
+      DONE;
+    }
+}")
+
+(define_expand "movhi"
+  [(set (match_operand:HI 0 "general_operand" "")
+        (match_operand:HI 1 "general_operand" ""))]
+  ""
+  "
+{
+  if (can_create_pseudo_p ())
+    {
+      if (GET_CODE (operands[0]) == MEM)
+        {
+          /* Source operand for store must be in a register */
+          operands[1] = force_reg (HImode, operands[1]);
+        }
+    }
+  if (GET_CODE (operands[1]) == CONST_INT)
+    {
+      operands[0] = gen_rtx_SUBREG (SImode, operands[0], 0);          
+      if (MEDIUM_INT (INTVAL (operands[1])))      
+        emit_insn (gen_movsi_kimm (operands[0], operands[1]));
+      else if (MEDIUM_UINT (INTVAL (operands[1])))   
+        emit_insn (gen_movsi_limm (operands[0], operands[1]));
+      else
+        {
+          emit_insn (gen_movsi_imm_hi (operands[0], GEN_INT (INTVAL (operands[1]))));
+          emit_insn (gen_movsi_imm_lo (operands[0], operands[0], GEN_INT (INTVAL (operands[1]))));
+        }
+      DONE;
+    }
+}")
+
+(define_expand "movsi"
+  [(set (match_operand:SI 0 "general_operand" "")
+        (match_operand:SI 1 "general_operand" ""))]
+  ""
+  "
+{
+  if (can_create_pseudo_p ())
+    {
+      if (GET_CODE (operands[0]) == MEM 
+	  || (GET_CODE (operands[0]) == SUBREG 
+	      && GET_CODE (SUBREG_REG (operands[0])) == MEM))
+        {
+          /* Source operand for store must be in a register */
+          operands[1] = force_reg (SImode, operands[1]);
+        }
+    }
+
+  if (flag_pic && symbolic_operand (operands[1], SImode)) 
+    {
+      if (GET_CODE (operands[1]) == LABEL_REF
+          || (GET_CODE (operands[1]) == SYMBOL_REF 
+              && SYMBOL_REF_LOCAL_P (operands[1])
+              && !SYMBOL_REF_WEAK (operands[1])))
+        {
+          emit_insn (gen_movsi_gotoff_hi16 (operands[0], operands[1]));
+          emit_insn (gen_addsi3 (operands[0], operands[0], pic_offset_table_rtx));
+          emit_insn (gen_movsi_gotoff_lo16 (operands[0], operands[0], operands[1]));
+        } 
+      else 
+        {
+          emit_insn (gen_movsi_got (operands[0], operands[1]));
+        }
+      crtl->uses_pic_offset_table = 1;
+      DONE;
+    }
+  else if (flag_pic && GET_CODE (operands[1]) == CONST) 
+    {
+      rtx op = XEXP (operands[1], 0);
+      if (GET_CODE (op) == PLUS)
+        {
+          rtx arg0 = XEXP (op, 0);
+          rtx arg1 = XEXP (op, 1);
+          if (GET_CODE (arg0) == LABEL_REF
+              || (GET_CODE (arg0) == SYMBOL_REF 
+                  && SYMBOL_REF_LOCAL_P (arg0)
+                  && !SYMBOL_REF_WEAK (arg0)))
+            {
+              emit_insn (gen_movsi_gotoff_hi16 (operands[0], arg0));
+              emit_insn (gen_addsi3 (operands[0], operands[0], pic_offset_table_rtx));
+              emit_insn (gen_movsi_gotoff_lo16 (operands[0], operands[0], arg0));
+            } 
+          else 
+            {
+              emit_insn (gen_movsi_got (operands[0], arg0));
+            }
+          emit_insn (gen_addsi3 (operands[0], operands[0], arg1));
+          crtl->uses_pic_offset_table = 1;
+          DONE;
+        }     
+    }
+  else if (!flag_pic && (   GET_CODE (operands[1]) == SYMBOL_REF
+                         && SYMBOL_REF_SMALL_P (operands[1])
+                        ) 
+          ) 
+    {
+      emit_insn (gen_movsi_reloc_gprel (operands[0], operands[1]));
+      DONE;
+    }
+  else if (!flag_pic && (   GET_CODE (operands[1]) == LABEL_REF
+                         || GET_CODE (operands[1]) == SYMBOL_REF
+                         || GET_CODE (operands[1]) == CONST                         
+                        )
+          )
+    {
+      emit_insn (gen_movsi_reloc_hi (operands[0], operands[1]));
+      emit_insn (gen_movsi_reloc_lo (operands[0], operands[0], operands[1]));
+      DONE;
+    }
+  else if (GET_CODE (operands[1]) == CONST_INT)
+    {
+      if (MEDIUM_INT (INTVAL (operands[1])))      
+        emit_insn (gen_movsi_kimm (operands[0], operands[1]));
+      else if (MEDIUM_UINT (INTVAL (operands[1])))   
+        emit_insn (gen_movsi_limm (operands[0], operands[1]));
+      else
+        {
+          emit_insn (gen_movsi_imm_hi (operands[0], GEN_INT (INTVAL (operands[1]))));
+          emit_insn (gen_movsi_imm_lo (operands[0], operands[0], GEN_INT (INTVAL (operands[1]))));
+        }
+      DONE;
+    }    
+}")
+
+;;(define_expand "movmemsi"
+;;  [(parallel [(set (match_operand:BLK 0 "general_operand" "")
+;;		   (match_operand:BLK 1 "general_operand" ""))
+;;	      (use (match_operand:SI 2 "" ""))
+;;	      (use (match_operand:SI 3 "const_int_operand" ""))])]
+;;  ""
+;;{
+;;  if (!lm32_expand_block_move (operands))
+;;    FAIL;
+;;  DONE;
+;;})
+
+;; ---------------------------------
+;;        load/stores/moves 
+;; ---------------------------------
+
+(define_insn "movsi_kimm"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+        (match_operand:SI 1 "constant_K_operand" "K"))]
+  ""
+  "addi     %0, r0, %1"
+  [(set_attr "type" "arith")]
+)
+
+(define_insn "movsi_limm"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+        (match_operand:SI 1 "constant_L_operand" "L"))]
+  ""
+  "ori      %0, r0, %1"
+  [(set_attr "type" "arith")]
+)
+
+(define_insn "movsi_imm_hi"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+        (high:SI (match_operand:SI 1 "immediate_operand" "i")))]
+  ""
+  "orhi     %0, r0, hi(%1)"
+  [(set_attr "type" "arith")]
+)
+
+(define_insn "movsi_imm_lo"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+        (lo_sum:SI (match_operand:SI 1 "register_operand" "0")
+                   (match_operand:SI 2 "immediate_operand" "i")))]
+  ""
+  "ori      %0, %0, lo(%2)"
+  [(set_attr "type" "arith")]
+)
+
+(define_insn "movsi_reloc_gprel"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+        (match_operand:SI 1 "reloc_operand" "i"))]
+  "GET_CODE (operands[1]) == SYMBOL_REF && SYMBOL_REF_SMALL_P (operands[1])"
+  "mva      %0, gp(%1)"
+  [(set_attr "type" "arith")]
+)
+
+(define_insn "movsi_got"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+        (unspec:SI [(match_operand 1 "" "")] UNSPEC_GOT))]
+  "flag_pic"
+  "lw       %0, (gp+got(%1))"
+  [(set_attr "type" "load")]
+)
+
+(define_insn "movsi_gotoff_hi16"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+        (unspec:SI [(match_operand 1 "" "")] UNSPEC_GOTOFF_HI16))]
+  "flag_pic"
+  "orhi     %0, r0, gotoffhi16(%1)"
+  [(set_attr "type" "load")]
+)
+
+(define_insn "movsi_gotoff_lo16"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+        (unspec:SI [(plus:SI (match_operand:SI 1 "register_operand" "0")
+                             (match_operand 2 "" ""))] UNSPEC_GOTOFF_LO16))]        
+  "flag_pic"
+  "addi     %0, %1, gotofflo16(%2)"
+  [(set_attr "type" "arith")]
+)
+  
+(define_insn "movsi_reloc_hi"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+        (high:SI (match_operand:SI 1 "reloc_operand" "i")))]
+  "!flag_pic"
+  "orhi     %0, r0, hi(%1)"
+  [(set_attr "type" "arith")]
+)
+
+(define_insn "movsi_reloc_lo"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+        (lo_sum:SI (match_operand:SI 1 "register_operand" "0")
+                   (match_operand:SI 2 "reloc_operand" "i")))]
+  "!flag_pic"
+  "ori      %0, %0, lo(%2)"
+  [(set_attr "type" "arith")]
+)
+
+(define_insn "*movqi_insn"
+  [(set (match_operand:QI 0 "register_or_memory_operand" "=r,r,m")
+        (match_operand:QI 1 "register_or_memory_operand" "m,r,r"))]
+  ""
+  "@
+   lbu      %0, %1
+   or       %0, %1, r0
+   sb       %0, %1"
+  [(set_attr "type" "load,arith,store")]   
+)
+   
+(define_insn "*movhi_insn"
+  [(set (match_operand:HI 0 "register_or_memory_operand" "=r,r,m")
+        (match_operand:HI 1 "register_or_memory_operand" "m,r,r"))]
+  ""
+  "@
+   lhu      %0, %1
+   or       %0, %1, r0
+   sh       %0, %1"
+  [(set_attr "type" "load,arith,store")]   
+)
+
+(define_insn "*movsi_insn"
+  [(set (match_operand:SI 0 "register_or_memory_operand" "=r,r,m")
+        (match_operand:SI 1 "register_or_memory_operand" "m,r,r"))]
+  ""
+  "@
+   lw       %0, %1
+   or       %0, %1, r0
+   sw       %0, %1"
+  [(set_attr "type" "load,arith,store")]   
+)
+
+;; ---------------------------------
+;;      sign and zero extension 
+;; ---------------------------------
+
+(define_insn "*extendqihi2"
+  [(set (match_operand:HI 0 "register_operand" "=r,r")
+        (sign_extend:HI (match_operand:QI 1 "register_or_memory_operand" "m,r")))]
+  "TARGET_SIGN_EXTEND_ENABLED || (GET_CODE (operands[1]) != REG)"
+  "@
+   lb       %0, %1
+   sextb    %0, %1"
+  [(set_attr "type" "load,arith")]
+)
+
+(define_insn "zero_extendqihi2"
+  [(set (match_operand:HI 0 "register_operand" "=r,r")
+        (zero_extend:HI (match_operand:QI 1 "register_or_memory_operand" "m,r")))]
+  ""
+  "@
+   lbu      %0, %1
+   andi     %0, %1, 0xff"
+  [(set_attr "type" "load,arith")]  
+)
+
+(define_insn "*extendqisi2"
+  [(set (match_operand:SI 0 "register_operand" "=r,r")
+        (sign_extend:SI (match_operand:QI 1 "register_or_memory_operand" "m,r")))]
+  "TARGET_SIGN_EXTEND_ENABLED || (GET_CODE (operands[1]) != REG)"
+  "@
+   lb       %0, %1
+   sextb    %0, %1"
+  [(set_attr "type" "load,arith")]
+)
+
+(define_insn "zero_extendqisi2"
+  [(set (match_operand:SI 0 "register_operand" "=r,r")
+	    (zero_extend:SI (match_operand:QI 1 "register_or_memory_operand" "m,r")))]
+  ""
+  "@
+   lbu      %0, %1
+   andi     %0, %1, 0xff"
+  [(set_attr "type" "load,arith")]  
+)
+
+(define_insn "*extendhisi2"
+  [(set (match_operand:SI 0 "register_operand" "=r,r")
+        (sign_extend:SI (match_operand:HI 1 "register_or_memory_operand" "m,r")))]
+  "TARGET_SIGN_EXTEND_ENABLED || (GET_CODE (operands[1]) != REG)"
+  "@
+   lh       %0, %1
+   sexth    %0, %1"
+  [(set_attr "type" "load,arith")]
+)
+
+(define_insn "zero_extendhisi2"
+  [(set (match_operand:SI 0 "register_operand" "=r,r")
+        (zero_extend:SI (match_operand:HI 1 "register_or_memory_operand" "m,r")))]
+  ""
+  "@
+   lhu      %0, %1
+   andi     %0, %1, 0xffff"
+  [(set_attr "type" "load,arith")]  
+)
+
+;; ---------------------------------
+;;             compare 
+;; ---------------------------------
+
+(define_expand "cmpsi"
+  [(set (cc0)
+   (compare:CC (match_operand:SI 0 "register_operand" "")
+               (match_operand:SI 1 "register_or_K_operand" "")))]
+  ""
+  "
+{
+  lm32_compare_op0 = operands[0];
+  lm32_compare_op1 = operands[1];
+  DONE;
+}")
+
+
+(define_expand "tstsi"
+  [(set (cc0)
+   (match_operand:SI 0 "register_operand" ""))]
+  ""
+  "
+{
+  lm32_compare_op0 = operands[0];
+  lm32_compare_op1 = const0_rtx;
+  DONE;
+}")
+
+(define_expand "seq"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+	(eq:SI (match_dup 1)
+	       (match_dup 2)))]
+  ""
+{
+  operands[1] = lm32_compare_op0;
+  operands[2] = lm32_compare_op1;
+  gen_int_relational (EQ, operands[0], operands[1], operands[2], NULL_RTX);
+  DONE;
+})
+
+(define_insn "*seq"
+  [(set (match_operand:SI 0 "register_operand" "=r,r")
+        (eq:SI (match_operand:SI 1 "register_or_zero_operand" "rJ,rJ")
+               (match_operand:SI 2 "register_or_K_operand" "r,K")))]
+  ""
+  "@
+   cmpe     %0, %z1, %2
+   cmpei    %0, %z1, %2"
+  [(set_attr "type" "compare")]
+)
+
+(define_expand "sne"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+	(ne:SI (match_dup 1)
+	       (match_dup 2)))]
+  ""
+{
+  operands[1] = lm32_compare_op0;
+  operands[2] = lm32_compare_op1;
+  gen_int_relational (NE, operands[0], operands[1], operands[2], NULL_RTX);
+  DONE;
+})
+
+(define_insn "*sne"
+  [(set (match_operand:SI 0 "register_operand" "=r,r")
+        (ne:SI (match_operand:SI 1 "register_or_zero_operand" "rJ,rJ")
+               (match_operand:SI 2 "register_or_K_operand" "r,K")))]
+  ""
+  "@
+   cmpne    %0, %z1, %2
+   cmpnei   %0, %z1, %2"
+  [(set_attr "type" "compare")]
+)
+
+(define_expand "sgt"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+	(gt:SI (match_dup 1)
+	       (match_dup 2)))]
+  ""
+{
+  operands[1] = lm32_compare_op0;
+  operands[2] = lm32_compare_op1;
+  gen_int_relational (GT, operands[0], operands[1], operands[2], NULL_RTX);
+  DONE;
+})
+
+(define_insn "*sgt"
+  [(set (match_operand:SI 0 "register_operand" "=r,r")
+        (gt:SI (match_operand:SI 1 "register_or_zero_operand" "rJ,rJ")
+               (match_operand:SI 2 "register_or_K_operand" "r,K")))]
+  ""
+  "@
+   cmpg     %0, %z1, %2
+   cmpgi    %0, %z1, %2"
+  [(set_attr "type" "compare")]
+)
+
+(define_expand "slt"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+	(lt:SI (match_dup 1)
+	       (match_dup 2)))]
+  ""
+{
+  operands[1] = lm32_compare_op0;
+  operands[2] = lm32_compare_op1;
+  gen_int_relational (LT, operands[0], operands[1], operands[2], NULL_RTX);
+  DONE;
+})
+
+(define_expand "sge"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+	(ge:SI (match_dup 1)
+	       (match_dup 2)))]
+  ""
+{
+  operands[1] = lm32_compare_op0;
+  operands[2] = lm32_compare_op1;
+  gen_int_relational (GE, operands[0], operands[1], operands[2], NULL_RTX);
+  DONE;
+})
+
+(define_insn "*sge"
+  [(set (match_operand:SI 0 "register_operand" "=r,r")
+        (ge:SI (match_operand:SI 1 "register_or_zero_operand" "rJ,rJ")
+               (match_operand:SI 2 "register_or_K_operand" "r,K")))]
+  ""
+  "@
+   cmpge    %0, %z1, %2
+   cmpgei   %0, %z1, %2"
+  [(set_attr "type" "compare")]
+)
+
+(define_expand "sle"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+	(le:SI (match_dup 1)
+	       (match_dup 2)))]
+  ""
+{
+  operands[1] = lm32_compare_op0;
+  operands[2] = lm32_compare_op1;
+  gen_int_relational (LE, operands[0], operands[1], operands[2], NULL_RTX);
+  DONE;
+})
+
+(define_expand "sgtu"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+	(gtu:SI (match_dup 1)
+	        (match_dup 2)))]
+  ""
+{
+  operands[1] = lm32_compare_op0;
+  operands[2] = lm32_compare_op1;
+  gen_int_relational (GTU, operands[0], operands[1], operands[2], NULL_RTX);
+  DONE;
+})
+
+(define_insn "*sgtu"
+  [(set (match_operand:SI 0 "register_operand" "=r,r")
+        (gtu:SI (match_operand:SI 1 "register_or_zero_operand" "rJ,rJ")
+                (match_operand:SI 2 "register_or_K_operand" "r,L")))]
+  ""
+  "@
+   cmpgu    %0, %z1, %2
+   cmpgui   %0, %z1, %2"
+  [(set_attr "type" "compare")]
+)
+
+(define_expand "sltu"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+	(ltu:SI (match_dup 1)
+	        (match_dup 2)))]
+  ""
+{
+  operands[1] = lm32_compare_op0;
+  operands[2] = lm32_compare_op1;
+  gen_int_relational (LTU, operands[0], operands[1], operands[2], NULL_RTX);
+  DONE;
+})
+
+(define_expand "sgeu"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+	(geu:SI (match_dup 1)
+	        (match_dup 2)))]
+  ""
+{
+  operands[1] = lm32_compare_op0;
+  operands[2] = lm32_compare_op1;
+  gen_int_relational (GEU, operands[0], operands[1], operands[2], NULL_RTX);
+  DONE;
+})
+
+(define_insn "*sgeu"
+  [(set (match_operand:SI 0 "register_operand" "=r,r")
+        (geu:SI (match_operand:SI 1 "register_or_zero_operand" "rJ,rJ")
+                (match_operand:SI 2 "register_or_K_operand" "r,L")))]
+  ""
+  "@
+   cmpgeu   %0, %z1, %2
+   cmpgeui  %0, %z1, %2"
+  [(set_attr "type" "compare")]
+)
+
+(define_expand "sleu"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+	(leu:SI (match_dup 1)
+	        (match_dup 2)))]
+  ""
+{
+  operands[1] = lm32_compare_op0;
+  operands[2] = lm32_compare_op1;
+  gen_int_relational (LEU, operands[0], operands[1], operands[2], NULL_RTX);
+  DONE;
+})
+
+;; ---------------------------------
+;;       unconditional branch
+;; ---------------------------------
+
+(define_insn "jump"
+  [(set (pc) (label_ref (match_operand 0 "" "")))]
+  ""
+  "bi       %0"
+  [(set_attr "type" "ubranch")]
+)
+
+(define_expand "indirect_jump"
+  [(set (pc) (match_operand 0 "register_operand" ""))]
+  ""
+  "
+{
+  emit_jump_insn (gen_indirect_jumpsi (operands[0]));
+  DONE;
+}")
+
+(define_insn "indirect_jumpsi"
+  [(set (pc) (match_operand:SI 0 "register_operand" "r"))]
+  ""
+  "b        %0"
+  [(set_attr "type" "uibranch")]
+)
+
+;; ---------------------------------
+;;        conditional branch
+;; ---------------------------------
+
+(define_expand "beq"
+  [(set (pc)
+   (if_then_else (eq:CC (cc0)
+                        (const_int 0))
+                 (label_ref (match_operand 0 "" ""))
+                 (pc)))]
+  ""
+  "
+{   
+  gen_int_relational (EQ, NULL_RTX, lm32_compare_op0, lm32_compare_op1, operands[0]);
+  DONE;
+}")
+
+(define_expand "bne"
+  [(set (pc)
+   (if_then_else (ne:CC (cc0)
+                        (const_int 0))
+                 (label_ref (match_operand 0 "" ""))
+                 (pc)))]
+  ""
+  "
+{ 
+  gen_int_relational (NE, NULL_RTX, lm32_compare_op0, lm32_compare_op1, operands[0]);
+  DONE;
+}")
+
+(define_expand "bgt"
+  [(set (pc)
+   (if_then_else (gt:CC (cc0)
+                        (const_int 0))
+                 (label_ref (match_operand 0 "" ""))
+                 (pc)))]
+  ""
+  "
+{ 
+  gen_int_relational (GT, NULL_RTX, lm32_compare_op0, lm32_compare_op1, operands[0]);
+  DONE;
+}")
+
+(define_expand "bge"
+  [(set (pc)
+   (if_then_else (ge:CC (cc0)
+                        (const_int 0))
+                 (label_ref (match_operand 0 "" ""))
+                 (pc)))]
+  ""
+  "
+{ 
+  gen_int_relational (GE, NULL_RTX, lm32_compare_op0, lm32_compare_op1, operands[0]);
+  DONE;
+}")
+
+(define_expand "ble"
+  [(set (pc)
+   (if_then_else (le:CC (cc0)
+                        (const_int 0))
+                 (label_ref (match_operand 0 "" ""))
+                 (pc)))]
+  ""
+  "
+{ 
+  gen_int_relational (LE, NULL_RTX, lm32_compare_op0, lm32_compare_op1, operands[0]);
+  DONE;
+}")
+
+(define_expand "blt"
+  [(set (pc)
+   (if_then_else (lt:CC (cc0)
+                        (const_int 0))
+                 (label_ref (match_operand 0 "" ""))
+                 (pc)))]
+  ""
+  "
+{ 
+  gen_int_relational (LT, NULL_RTX, lm32_compare_op0, lm32_compare_op1, operands[0]);
+  DONE;
+}")
+
+(define_expand "bgtu"
+  [(set (pc)
+   (if_then_else (gtu:CC (cc0)
+                         (const_int 0))
+                 (label_ref (match_operand 0 "" ""))
+                 (pc)))]
+  ""
+  "
+{ 
+  gen_int_relational (GTU, NULL_RTX, lm32_compare_op0, lm32_compare_op1, operands[0]);
+  DONE;
+}")
+
+(define_expand "bgeu"
+  [(set (pc)
+   (if_then_else (geu:CC (cc0)
+                         (const_int 0))
+                 (label_ref (match_operand 0 "" ""))
+                 (pc)))]
+  ""
+  "
+{ 
+  gen_int_relational (GEU, NULL_RTX, lm32_compare_op0, lm32_compare_op1, operands[0]);
+  DONE;
+}")
+
+(define_expand "bleu"
+  [(set (pc)
+   (if_then_else (leu:CC (cc0)
+                         (const_int 0))
+                 (label_ref (match_operand 0 "" ""))
+                 (pc)))]
+  ""
+  "
+{ 
+  gen_int_relational (LEU, NULL_RTX, lm32_compare_op0, lm32_compare_op1, operands[0]);
+  DONE;
+}")
+
+(define_expand "bltu"
+  [(set (pc)
+   (if_then_else (ltu:CC (cc0)
+                         (const_int 0))
+                 (label_ref (match_operand 0 "" ""))
+                 (pc)))]
+  ""
+  "
+{ 
+  gen_int_relational (LTU, NULL_RTX, lm32_compare_op0, lm32_compare_op1, operands[0]);
+  DONE;
+}")
+
+(define_insn "*beq"
+  [(set (pc)
+        (if_then_else (eq:SI (match_operand:SI 0 "register_or_zero_operand" "rJ")
+                             (match_operand:SI 1 "register_or_zero_operand" "rJ"))
+                      (label_ref (match_operand 2 "" ""))
+                      (pc)))]
+  ""
+{
+  return get_attr_length (insn) == 4
+        ? "be     %z0,%z1,%2"
+        : "bne    %z0,%z1,8\n\tbi     %2";
+}  
+  [(set_attr "type" "cbranch")])
+
+(define_insn "*bne"
+  [(set (pc)
+        (if_then_else (ne:SI (match_operand:SI 0 "register_or_zero_operand" "rJ")
+                             (match_operand:SI 1 "register_or_zero_operand" "rJ"))
+                      (label_ref (match_operand 2 "" ""))
+                      (pc)))]
+  ""
+{
+  return get_attr_length (insn) == 4
+        ? "bne    %z0,%z1,%2"
+        : "be     %z0,%z1,8\n\tbi     %2";
+}  
+  [(set_attr "type" "cbranch")])
+
+(define_insn "*bgt"
+  [(set (pc)
+        (if_then_else (gt:SI (match_operand:SI 0 "register_or_zero_operand" "rJ")
+                             (match_operand:SI 1 "register_or_zero_operand" "rJ"))
+                      (label_ref (match_operand 2 "" ""))
+                      (pc)))]
+  ""
+{
+  return get_attr_length (insn) == 4
+        ? "bg     %z0,%z1,%2"
+        : "bge    %z1,%z0,8\n\tbi     %2";
+}  
+  [(set_attr "type" "cbranch")])
+
+(define_insn "*bge"
+  [(set (pc)
+        (if_then_else (ge:SI (match_operand:SI 0 "register_or_zero_operand" "rJ")
+                             (match_operand:SI 1 "register_or_zero_operand" "rJ"))
+                      (label_ref (match_operand 2 "" ""))
+                      (pc)))]
+  ""
+{
+  return get_attr_length (insn) == 4
+        ? "bge    %z0,%z1,%2"
+        : "bg     %z1,%z0,8\n\tbi     %2";
+}  
+  [(set_attr "type" "cbranch")])
+
+(define_insn "*bgtu"
+  [(set (pc)
+        (if_then_else (gtu:SI (match_operand:SI 0 "register_or_zero_operand" "rJ")
+                              (match_operand:SI 1 "register_or_zero_operand" "rJ"))
+                      (label_ref (match_operand 2 "" ""))
+                      (pc)))]
+  ""
+{
+  return get_attr_length (insn) == 4
+        ? "bgu    %z0,%z1,%2"
+        : "bgeu   %z1,%z0,8\n\tbi     %2";
+}  
+  [(set_attr "type" "cbranch")])
+
+(define_insn "*bgeu"
+  [(set (pc)
+        (if_then_else (geu:SI (match_operand:SI 0 "register_or_zero_operand" "rJ")
+                              (match_operand:SI 1 "register_or_zero_operand" "rJ"))
+                      (label_ref (match_operand 2 "" ""))
+                      (pc)))]
+  ""
+{
+  return get_attr_length (insn) == 4
+        ? "bgeu   %z0,%z1,%2"
+        : "bgu    %z1,%z0,8\n\tbi     %2";
+}  
+  [(set_attr "type" "cbranch")])
+
+;; ---------------------------------
+;;               call 
+;; ---------------------------------
+
+(define_expand "call"
+  [(parallel [(call (match_operand 0 "memory_operand" "m")
+                    (match_operand 1 "" ""))
+              (clobber (reg:SI RA_REGNUM))
+             ])]
+  ""
+  "
+{
+  rtx addr = XEXP (operands[0], 0);
+  if (!CONSTANT_ADDRESS_P (addr))
+    {
+      emit_call_insn (gen_call_via_regsi (addr, operands[1]));
+      DONE;
+    }
+}")
+
+(define_insn "call_via_regsi"
+  [(call (mem:SI (match_operand:SI 0 "register_operand" "r"))
+         (match_operand 1 "" ""))
+   (clobber (reg:SI RA_REGNUM))]
+  ""
+  "call     %0"
+  [(set_attr "type" "icall")]  
+)
+
+(define_insn "*call_via_labelsi"
+  [(call (mem:SI (match_operand:SI 0 "symbolic_operand" "X"))
+         (match_operand 1 "" ""))
+   (clobber (reg:SI RA_REGNUM))]
+  ""
+  "calli    %0"
+  [(set_attr "type" "call")]  
+)
+
+(define_expand "call_value"
+  [(parallel [(set (match_operand 0 "register_operand" "=r")
+                   (call (match_operand 1 "memory_operand" "m")
+                         (match_operand 2 "" "")))
+              (clobber (reg:SI RA_REGNUM))
+             ])]
+  ""
+  "
+{
+  rtx addr = XEXP (operands[1], 0);
+  if (!CONSTANT_ADDRESS_P (addr))
+    {
+      emit_call_insn (gen_call_value_via_regsi (operands[0], addr, operands[2]));
+      DONE;
+    }
+}")
+
+(define_insn "call_value_via_regsi"
+  [(set (match_operand 0 "register_operand" "=r")
+        (call (mem:SI (match_operand:SI 1 "register_operand" "r"))
+              (match_operand 2 "" "")))
+   (clobber (reg:SI RA_REGNUM))]
+  ""
+  "call      %1"
+  [(set_attr "type" "icall")]  
+)
+
+(define_insn "*call_value_via_labelsi"
+  [(set (match_operand 0 "register_operand" "=r")
+        (call (mem:SI (match_operand:SI 1 "symbolic_operand" "X"))
+              (match_operand 2 "" "")))
+   (clobber (reg:SI RA_REGNUM))]
+  ""
+  "calli    %1"
+  [(set_attr "type" "call")]  
+)
+
+(define_insn "return_internalsi"
+  [(use (match_operand:SI 0 "register_operand" "r"))
+   (return)]
+  ""
+  "b        %0"
+  [(set_attr "type" "uibranch")]  
+)
+
+(define_insn "return"
+  [(return)]
+  "lm32_can_use_return ()"
+  "ret"
+  [(set_attr "type" "uibranch")]  
+) 
+
+;; ---------------------------------
+;;       switch/case statements 
+;; ---------------------------------
+  
+(define_expand "tablejump"
+  [(set (pc) (match_operand 0 "register_operand" ""))
+   (use (label_ref (match_operand 1 "" "")))]
+  ""
+  "
+{
+  rtx target = operands[0];
+  if (flag_pic)
+    {
+      /* For PIC, the table entry is relative to the start of the table.  */
+      rtx label = gen_reg_rtx (SImode);
+      target = gen_reg_rtx (SImode);
+      emit_move_insn (label, gen_rtx_LABEL_REF (SImode, operands[1]));
+      emit_insn (gen_addsi3 (target, operands[0], label));
+    }
+  emit_jump_insn (gen_tablejumpsi (target, operands[1]));
+  DONE;
+}")
+
+(define_insn "tablejumpsi"
+  [(set (pc) (match_operand:SI 0 "register_operand" "r"))
+   (use (label_ref (match_operand 1 "" "")))]
+  ""
+  "b        %0"
+  [(set_attr "type" "ubranch")]  
+)
+
+;; ---------------------------------
+;;            arithmetic 
+;; ---------------------------------
+
+(define_insn "addsi3"
+  [(set (match_operand:SI 0 "register_operand" "=r,r")
+        (plus:SI (match_operand:SI 1 "register_or_zero_operand" "rJ,rJ")
+                 (match_operand:SI 2 "register_or_K_operand" "r,K")))]
+  ""
+  "@
+   add      %0, %z1, %2
+   addi     %0, %z1, %2"
+  [(set_attr "type" "arith")]  
+)
+
+(define_insn "subsi3"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+        (minus:SI (match_operand:SI 1 "register_or_zero_operand" "rJ")
+                  (match_operand:SI 2 "register_or_zero_operand" "rJ")))]
+  ""
+  "sub      %0, %z1, %z2"
+  [(set_attr "type" "arith")]  
+)
+
+(define_insn "mulsi3"
+  [(set (match_operand:SI 0 "register_operand" "=r,r")
+        (mult:SI (match_operand:SI 1 "register_or_zero_operand" "rJ,rJ")
+                 (match_operand:SI 2 "register_or_K_operand" "r,K")))]
+  "TARGET_MULTIPLY_ENABLED"
+  "@
+   mul      %0, %z1, %2
+   muli     %0, %z1, %2"
+  [(set_attr "type" "multiply")]
+)
+
+(define_insn "udivsi3"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+        (udiv:SI (match_operand:SI 1 "register_or_zero_operand" "rJ")
+                 (match_operand:SI 2 "register_operand" "r")))]
+  "TARGET_DIVIDE_ENABLED"
+  "divu     %0, %z1, %2"
+  [(set_attr "type" "divide")]
+)
+
+(define_insn "umodsi3"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+        (umod:SI (match_operand:SI 1 "register_or_zero_operand" "rJ")
+                 (match_operand:SI 2 "register_operand" "r")))]
+  "TARGET_DIVIDE_ENABLED"
+  "modu     %0, %z1, %2"
+  [(set_attr "type" "divide")]
+)
+
+;; ---------------------------------
+;;      negation and inversion 
+;; ---------------------------------
+               
+(define_insn "negsi2"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+        (neg:SI (match_operand:SI 1 "register_or_zero_operand" "rJ")))]
+  ""
+  "sub      %0, r0, %z1"
+  [(set_attr "type" "arith")]
+)      
+
+(define_insn "one_cmplsi2"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+        (not:SI (match_operand:SI 1 "register_or_zero_operand" "rJ")))]
+  ""
+  "not      %0, %z1"
+  [(set_attr "type" "arith")]
+)
+
+;; ---------------------------------
+;;             logical 
+;; ---------------------------------
+
+(define_insn "andsi3"
+  [(set (match_operand:SI 0 "register_operand" "=r,r")
+        (and:SI (match_operand:SI 1 "register_or_zero_operand" "rJ,rJ")
+                (match_operand:SI 2 "register_or_L_operand" "r,L")))]
+  ""
+  "@
+   and      %0, %z1, %2
+   andi     %0, %z1, %2"
+  [(set_attr "type" "arith")]
+)
+
+(define_insn "iorsi3"
+  [(set (match_operand:SI 0 "register_operand" "=r,r")
+        (ior:SI (match_operand:SI 1 "register_or_zero_operand" "rJ,rJ")
+                (match_operand:SI 2 "register_or_L_operand" "r,L")))]
+  ""
+  "@
+   or       %0, %z1, %2
+   ori      %0, %z1, %2"
+  [(set_attr "type" "arith")]
+)
+
+(define_insn "xorsi3"
+  [(set (match_operand:SI 0 "register_operand" "=r,r")
+        (xor:SI (match_operand:SI 1 "register_or_zero_operand" "rJ,rJ")
+                (match_operand:SI 2 "register_or_L_operand" "r,L")))]
+  ""
+  "@
+   xor      %0, %z1, %2
+   xori     %0, %z1, %2"
+  [(set_attr "type" "arith")]
+)
+
+(define_insn "*norsi3"
+  [(set (match_operand:SI 0 "register_operand" "=r,r")
+	(not:SI (ior:SI (match_operand:SI 1 "register_or_zero_operand" "rJ,rJ")
+			(match_operand:SI 2 "register_or_L_operand" "r,L"))))]
+  ""
+  "@ 
+   nor      %0, %z1, %2
+   nori     %0, %z1, %2"     		
+  [(set_attr "type" "arith")]
+)                
+
+(define_insn "*xnorsi3"
+  [(set (match_operand:SI 0 "register_operand" "=r,r")
+	(not:SI (xor:SI (match_operand:SI 1 "register_or_zero_operand" "rJ,rJ")
+			(match_operand:SI 2 "register_or_L_operand" "r,L"))))]
+  ""
+  "@
+   xnor     %0, %z1, %2
+   xnori    %0, %z1, %2"     		
+  [(set_attr "type" "arith")]
+)                
+
+;; ---------------------------------
+;;              shifts 
+;; ---------------------------------
+
+(define_insn "ashlsi3"
+  [(set (match_operand:SI 0 "register_operand" "=r,r")
+        (ashift:SI (match_operand:SI 1 "register_or_zero_operand" "rJ,rJ")
+                   (match_operand:SI 2 "register_or_L_operand" "r,L")))]
+  "TARGET_BARREL_SHIFT_ENABLED"
+  "@ 
+   sl       %0, %z1, %2
+   sli      %0, %z1, %2"
+  [(set_attr "type" "shift")]
+)
+
+(define_insn "ashrsi3"
+  [(set (match_operand:SI 0 "register_operand" "=r,r")
+        (ashiftrt:SI (match_operand:SI 1 "register_or_zero_operand" "rJ,rJ")
+                     (match_operand:SI 2 "register_or_L_operand" "r,L")))]
+  "TARGET_BARREL_SHIFT_ENABLED"
+  "@
+   sr       %0, %z1, %2
+   sri      %0, %z1, %2"
+  [(set_attr "type" "shift")]
+)
+
+(define_insn "lshrsi3"
+  [(set (match_operand:SI 0 "register_operand" "=r,r")
+        (lshiftrt:SI (match_operand:SI 1 "register_or_zero_operand" "rJ,rJ")
+                     (match_operand:SI 2 "register_or_L_operand" "r,L")))]
+  "TARGET_BARREL_SHIFT_ENABLED"
+  "@ 
+   sru      %0, %z1, %2
+   srui     %0, %z1, %2"
+  [(set_attr "type" "shift")]   
+)
+
+;; ---------------------------------
+;;     function entry / exit 
+;; ---------------------------------
+
+(define_expand "prologue"
+  [(const_int 1)]
+  ""
+  "
+{
+  lm32_expand_prologue ();
+  DONE;
+}")
+
+(define_expand "epilogue"
+  [(return)]
+  ""
+  "
+{
+  lm32_expand_epilogue ();
+  DONE;
+}")
+
+;; ---------------------------------
+;;              nop 
+;; ---------------------------------
+
+(define_insn "nop"  
+  [(const_int 0)]
+  ""
+  "nop"
+  [(set_attr "type" "arith")]
+)
+
+;; ---------------------------------
+;;             blockage 
+;; ---------------------------------
+
+;; used to stop the scheduler from 
+;; scheduling code across certain boundaries
+
+(define_insn "blockage"
+  [(unspec_volatile [(const_int 0)] UNSPECV_BLOCKAGE)]
+  ""
+  ""
+  [(set_attr "length" "0")]
+)
+
diff -Naur gcc-4.4.2.orig/gcc/config/lm32/lm32.opt gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/lm32.opt
--- gcc-4.4.2.orig/gcc/config/lm32/lm32.opt	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/lm32.opt	2009-10-15 18:36:00.000000000 +0200
@@ -0,0 +1,40 @@
+; Options for the Lattice Mico32 port of the compiler.
+; Contributed by Jon Beniston <jon@beniston.com>
+;
+; Copyright (C) 2008 Free Software Foundation, Inc.
+;
+; This file is part of GCC.
+;
+; GCC is free software; you can redistribute it and/or modify it
+; under the terms of the GNU General Public License as published
+; by the Free Software Foundation; either version 3, or (at your
+; option) any later version.
+;
+; GCC is distributed in the hope that it will be useful, but WITHOUT
+; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+; or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+; License for more details.
+; 
+; You should have received a copy of the GNU General Public License
+; along with GCC; see the file COPYING3.  If not see
+;  <http://www.gnu.org/licenses/>.  
+   
+mmultiply-enabled
+Target Report Mask(MULTIPLY_ENABLED)
+Enable multiply instructions
+
+mdivide-enabled
+Target Report Mask(DIVIDE_ENABLED)
+Enable divide and modulus instructions
+
+mbarrel-shift-enabled
+Target Report Mask(BARREL_SHIFT_ENABLED)
+Enable barrel shift instructions
+
+msign-extend-enabled
+Target Report Mask(SIGN_EXTEND_ENABLED)
+Enable sign extend instructions
+
+muser-enabled
+Target Report Mask(USER_ENABLED)
+Enable user-defined instructions
diff -Naur gcc-4.4.2.orig/gcc/config/lm32/lm32-protos.h gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/lm32-protos.h
--- gcc-4.4.2.orig/gcc/config/lm32/lm32-protos.h	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/lm32-protos.h	2009-10-15 18:36:00.000000000 +0200
@@ -0,0 +1,52 @@
+/* Prototypes of target machine functions, Lattice Mico32 architecture.
+   Contributed by Jon Beniston <jon@beniston.com>
+
+   Copyright (C) 2008 Free Software Foundation, Inc.
+
+   This file is part of GCC.
+
+   GCC is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published
+   by the Free Software Foundation; either version 3, or (at your
+   option) any later version.
+
+   GCC is distributed in the hope that it will be useful, but WITHOUT
+   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+   License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GCC; see the file COPYING3.  If not see
+   <http://www.gnu.org/licenses/>.  */
+
+extern int lm32_return_in_memory (tree type);
+extern void lm32_declare_object (FILE *stream, char *name, char *init_string, 
+                                 char *final_string, int size);
+extern int symbolic_operand (rtx op, enum machine_mode mode ATTRIBUTE_UNUSED);
+extern int register_or_zero_operand (rtx op, enum machine_mode mode);
+extern int register_or_K_operand (rtx op, enum machine_mode mode);
+extern int constant_K_operand (rtx op, enum machine_mode mode ATTRIBUTE_UNUSED);
+extern int register_or_L_operand (rtx op, enum machine_mode mode);
+extern int constant_L_operand (rtx op, enum machine_mode mode ATTRIBUTE_UNUSED);
+extern int register_or_memory_operand (rtx op, enum machine_mode mode);
+extern int register_operand (rtx op, enum machine_mode mode);
+extern int const_ok_for_base_offset (rtx op, enum machine_mode mode);
+extern void lm32_expand_prologue (void);
+extern void lm32_expand_epilogue (void);
+extern HOST_WIDE_INT lm32_compute_frame_size (int size);
+extern void lm32_print_operand (FILE *file, rtx op, int letter);
+extern void lm32_print_operand_address (FILE *file, rtx addr);
+extern rtx lm32_function_arg (CUMULATIVE_ARGS cum, enum machine_mode mode,
+                              tree type, int named);
+extern void lm32_override_options (void);
+extern HOST_WIDE_INT lm32_compute_initial_elimination_offset (int from, 
+                                                             int to);
+extern int lm32_can_use_return (void);
+extern rtx lm32_return_addr_rtx (int count, rtx frame);
+#ifdef RTX_CODE
+extern void gen_int_relational (enum rtx_code code, rtx result, rtx cmp0, 
+                                rtx cmp1, rtx destination);
+#endif
+extern int lm32_expand_block_move (rtx *);
+extern int nonpic_symbol_mentioned_p (rtx);
+extern rtx lm32_legitimize_pic_address (rtx, enum machine_mode, rtx);
diff -Naur gcc-4.4.2.orig/gcc/config/lm32/predicates.md gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/predicates.md
--- gcc-4.4.2.orig/gcc/config/lm32/predicates.md	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/predicates.md	2009-10-15 18:36:00.000000000 +0200
@@ -0,0 +1,58 @@
+;; Predicate definitions for Lattice Mico32.
+;; Contributed by Jon Beniston <jon@beniston.com>
+;;
+;; Copyright (C) 2008 Free Software Foundation, Inc.
+;;
+;; This file is part of GCC.
+;;
+;; GCC is free software; you can redistribute it and/or modify it
+;; under the terms of the GNU General Public License as published
+;; by the Free Software Foundation; either version 3, or (at your
+;; option) any later version.
+;;
+;; GCC is distributed in the hope that it will be useful, but WITHOUT
+;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+;; or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+;; License for more details.
+;; 
+;; You should have received a copy of the GNU General Public License
+;; along with GCC; see the file COPYING3.  If not see
+;;  <http://www.gnu.org/licenses/>.  
+
+(define_predicate "const0_operand"
+  (and (match_code "const_int,const_double,const_vector")
+       (match_test "op == CONST0_RTX (GET_MODE (op))")))
+
+(define_predicate "constant_K_operand"
+  (and (match_code "const_int")
+       (match_test "MEDIUM_INT (INTVAL (op))")))
+       
+(define_predicate "constant_L_operand"
+  (and (match_code "const_int")
+       (match_test "MEDIUM_UINT (INTVAL (op))")))
+
+(define_predicate "register_or_zero_operand"
+  (ior (match_operand 0 "register_operand")
+       (match_operand 0 "const0_operand")))
+
+(define_predicate "register_or_memory_operand"
+  (ior (match_operand 0 "register_operand")
+       (match_operand 0 "memory_operand")))
+       
+(define_predicate "register_or_K_operand"
+  (ior (match_operand 0 "register_operand")
+       (match_operand 0 "constant_K_operand")))
+         
+(define_predicate "register_or_L_operand"
+  (ior (match_operand 0 "register_operand")
+       (match_operand 0 "constant_L_operand")))
+
+(define_predicate "reloc_operand"
+  (ior (ior (match_code "label_ref")
+            (match_code "symbol_ref"))
+       (match_code "const")))
+
+(define_predicate "symbolic_operand"
+  (ior (match_code "label_ref")
+       (match_code "symbol_ref")))
+       
diff -Naur gcc-4.4.2.orig/gcc/config/lm32/rtems.h gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/rtems.h
--- gcc-4.4.2.orig/gcc/config/lm32/rtems.h	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/rtems.h	2009-10-15 18:36:00.000000000 +0200
@@ -0,0 +1,32 @@
+/* Definitions for rtems targeting a lm32 using ELF.
+   Copyright (C) 2009, Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+/* Target OS builtins.  */
+#undef TARGET_OS_CPP_BUILTINS
+#define TARGET_OS_CPP_BUILTINS()		\
+  do						\
+    {						\
+	builtin_define ("__rtems__");		\
+	builtin_define ("__USE_INIT_FINI__");	\
+	builtin_assert ("system=rtems");	\
+    }						\
+  while (0)
+
+/* Use the default */
+#undef LINK_GCC_C_SEQUENCE_SPEC
diff -Naur gcc-4.4.2.orig/gcc/config/lm32/sfp-machine.h gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/sfp-machine.h
--- gcc-4.4.2.orig/gcc/config/lm32/sfp-machine.h	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/sfp-machine.h	2009-10-15 18:36:00.000000000 +0200
@@ -0,0 +1,51 @@
+#define _FP_W_TYPE_SIZE		32
+#define _FP_W_TYPE		unsigned long
+#define _FP_WS_TYPE		signed long
+#define _FP_I_TYPE		long
+
+#define _FP_MUL_MEAT_S(R,X,Y)				\
+  _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
+#define _FP_MUL_MEAT_D(R,X,Y)				\
+  _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
+#define _FP_MUL_MEAT_Q(R,X,Y)				\
+  _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
+
+#define _FP_DIV_MEAT_S(R,X,Y)	_FP_DIV_MEAT_1_loop(S,R,X,Y)
+#define _FP_DIV_MEAT_D(R,X,Y)	_FP_DIV_MEAT_2_udiv(D,R,X,Y)
+#define _FP_DIV_MEAT_Q(R,X,Y)	_FP_DIV_MEAT_4_udiv(Q,R,X,Y)
+
+#define _FP_NANFRAC_S		((_FP_QNANBIT_S << 1) - 1)
+#define _FP_NANFRAC_D		((_FP_QNANBIT_D << 1) - 1), -1
+#define _FP_NANFRAC_Q		((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1
+#define _FP_NANSIGN_S		0
+#define _FP_NANSIGN_D		0
+#define _FP_NANSIGN_Q		0
+
+#define _FP_KEEPNANFRACP 1
+
+/* Someone please check this.  */
+#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)			\
+  do {								\
+    if ((_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)		\
+	&& !(_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs))	\
+      {								\
+	R##_s = Y##_s;						\
+	_FP_FRAC_COPY_##wc(R,Y);				\
+      }								\
+    else							\
+      {								\
+	R##_s = X##_s;						\
+	_FP_FRAC_COPY_##wc(R,X);				\
+      }								\
+    R##_c = FP_CLS_NAN;						\
+  } while (0)
+
+#define	__LITTLE_ENDIAN	1234
+#define	__BIG_ENDIAN	4321
+
+#define __BYTE_ORDER __BIG_ENDIAN
+
+/* Define ALIASNAME as a strong alias for NAME.  */
+# define strong_alias(name, aliasname) _strong_alias(name, aliasname)
+# define _strong_alias(name, aliasname) \
+  extern __typeof (name) aliasname __attribute__ ((alias (#name)));
diff -Naur gcc-4.4.2.orig/gcc/config/lm32/t-fprules-softfp gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/t-fprules-softfp
--- gcc-4.4.2.orig/gcc/config/lm32/t-fprules-softfp	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/t-fprules-softfp	2009-10-15 18:36:00.000000000 +0200
@@ -0,0 +1,5 @@
+softfp_float_modes := sf df
+softfp_int_modes := si di
+softfp_extensions := sfdf
+softfp_truncations := dfsf
+softfp_machine_header := lm32/sfp-machine.h
diff -Naur gcc-4.4.2.orig/gcc/config/lm32/t-lm32 gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/t-lm32
--- gcc-4.4.2.orig/gcc/config/lm32/t-lm32	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/t-lm32	2009-10-15 18:36:00.000000000 +0200
@@ -0,0 +1,19 @@
+LIB1ASMSRC = lm32/lib1funcs.S
+LIB1ASMFUNCS = _ashlsi3 _ashrsi3 _lshrsi3
+
+LM32_LIB1CSRC = $(srcdir)/config/lm32/arithmetic.c
+LIB2FUNCS_EXTRA = _mulsi3.c \
+                  _udivmodsi4.c _divsi3.c _modsi3.c _udivsi3.c _umodsi3.c 
+# Size optimised versions: _ashlsi3.c _ashrsi3.c _lshrsi3.c 
+	          	          
+# The fixed-point arithmetic code is in one file
+# similar to libgcc2.c (or the old libgcc1.c).  We need to
+# "split it up" with one file per define.
+$(LIB2FUNCS_EXTRA): $(LM32_LIB1CSRC)
+	name=`echo $@ | sed -e 's,.*/,,' | sed -e 's,.c$$,,'`; \
+	echo "#define L$$name" > tmp-$@ \
+	&& echo '#include "$<"' >> tmp-$@ \
+	&& mv -f tmp-$@ $@
+
+MULTILIB_OPTIONS = mmultiply-enabled mbarrel-shift-enabled 
+# Don't bother building multilib with mdivide-enabled, not much of a gain
diff -Naur gcc-4.4.2.orig/gcc/config/lm32/uclinux-elf.h gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/uclinux-elf.h
--- gcc-4.4.2.orig/gcc/config/lm32/uclinux-elf.h	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/gcc/config/lm32/uclinux-elf.h	2009-10-15 18:36:00.000000000 +0200
@@ -0,0 +1,85 @@
+/* Definitions for LM32 running Linux-based GNU systems using ELF
+   Copyright (C) 1993, 1994, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
+   2008 Free Software Foundation, Inc.
+   Contributed by Philip Blundell <philb@gnu.org>
+
+   This file is part of GCC.
+
+   GCC is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published
+   by the Free Software Foundation; either version 3, or (at your
+   option) any later version.
+
+   GCC is distributed in the hope that it will be useful, but WITHOUT
+   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+   License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GCC; see the file COPYING3.  If not see
+   <http://www.gnu.org/licenses/>.  */
+
+/* elfos.h should have already been included.  Now just override
+   any conflicting definitions and add any extras.  */
+
+/* Run-time Target Specification.  */
+#undef  TARGET_VERSION
+#define TARGET_VERSION  fputs (" (LM32 GNU/Linux with ELF)", stderr);
+
+/* Do not assume anything about header files.  */
+#undef NO_IMPLICIT_EXTERN_C
+#define NO_IMPLICIT_EXTERN_C
+
+/* The GNU C++ standard library requires that these macros be defined.  */
+#undef CPLUSPLUS_CPP_SPEC
+#define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
+
+/* Now we define the strings used to build the spec file.  */
+#undef  LIB_SPEC
+#define LIB_SPEC \
+  "%{pthread:-lpthread} \
+   %{shared:-lc} \
+   %{!shared:-lc} "
+
+#define LIBGCC_SPEC "-lgcc"
+
+/* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
+   the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
+   provides part of the support for getting C++ file-scope static
+   object constructed before entering `main'.  */
+
+#undef  STARTFILE_SPEC
+#define STARTFILE_SPEC \
+  "%{!shared: \
+     %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
+                       %{!p:%{profile:gcrt1.o%s} \
+                         %{!profile:crt1.o%s}}}} \
+   crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
+
+/* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
+   the GNU/Linux magical crtend.o file (see crtstuff.c) which
+   provides part of the support for getting C++ file-scope static
+   object constructed before entering `main', followed by a normal
+   GNU/Linux "finalizer" file, `crtn.o'.  */
+
+#undef  ENDFILE_SPEC
+#define ENDFILE_SPEC \
+  "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
+
+#undef  LINK_SPEC
+#define LINK_SPEC "%{h*} %{version:-v} \
+   %{b} %{Wl,*:%*} \
+   %{static:-Bstatic} \
+   %{shared:-shared} \
+   %{symbolic:-Bsymbolic} \
+   %{rdynamic:-export-dynamic} \
+   %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}"
+
+#define TARGET_OS_CPP_BUILTINS() LINUX_TARGET_OS_CPP_BUILTINS()
+
+#define LINK_GCC_C_SEQUENCE_SPEC \
+  "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
+
+#undef  CC1_SPEC
+#define CC1_SPEC "%{G*} %{!fno-PIC:-fPIC}"
+
diff -Naur gcc-4.4.2.orig/gcc/config/mips/elf.h gcc-4.4.2-rtems4.10-20091015/gcc/config/mips/elf.h
--- gcc-4.4.2.orig/gcc/config/mips/elf.h	2007-08-02 12:49:31.000000000 +0200
+++ gcc-4.4.2-rtems4.10-20091015/gcc/config/mips/elf.h	2009-10-15 18:36:00.000000000 +0200
@@ -48,6 +48,4 @@
 #undef  ENDFILE_SPEC
 #define ENDFILE_SPEC "crtend%O%s crtn%O%s"
 
-#define NO_IMPLICIT_EXTERN_C 1
-
 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
diff -Naur gcc-4.4.2.orig/gcc/config/rs6000/rtems.h gcc-4.4.2-rtems4.10-20091015/gcc/config/rs6000/rtems.h
--- gcc-4.4.2.orig/gcc/config/rs6000/rtems.h	2007-08-02 12:49:31.000000000 +0200
+++ gcc-4.4.2-rtems4.10-20091015/gcc/config/rs6000/rtems.h	2009-10-15 18:36:00.000000000 +0200
@@ -49,8 +49,18 @@
 %{mcpu=604:  %{!Dppc*: %{!Dmpc*: -Dmpc604}  } } \
 %{mcpu=750:  %{!Dppc*: %{!Dmpc*: -Dmpc750}  } } \
 %{mcpu=821:  %{!Dppc*: %{!Dmpc*: -Dmpc821}  } } \
-%{mcpu=860:  %{!Dppc*: %{!Dmpc*: -Dmpc860}  } }" 
+%{mcpu=860:  %{!Dppc*: %{!Dmpc*: -Dmpc860}  } } \
+%{mcpu=8540: %{!Dppc*: %{!Dmpc*: -Dppc8540}  } }" 
 
 #undef  SUBSUBTARGET_EXTRA_SPECS
 #define SUBSUBTARGET_EXTRA_SPECS \
   { "cpp_os_rtems",		CPP_OS_RTEMS_SPEC }
+
+#undef SUBSUBTARGET_OVERRIDE_OPTIONS
+#define SUBSUBTARGET_OVERRIDE_OPTIONS		\
+  do {						\
+    if (TARGET_E500)				\
+      {						\
+	rs6000_float_gprs = 1;			\
+      }						\
+  } while(0)
diff -Naur gcc-4.4.2.orig/gcc/config/rs6000/t-rtems gcc-4.4.2-rtems4.10-20091015/gcc/config/rs6000/t-rtems
--- gcc-4.4.2.orig/gcc/config/rs6000/t-rtems	2009-03-25 13:54:16.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/gcc/config/rs6000/t-rtems	2009-10-15 18:36:00.000000000 +0200
@@ -1,12 +1,12 @@
 # Multilibs for powerpc RTEMS targets.
 
 MULTILIB_OPTIONS	= \
-mcpu=403/mcpu=505/mcpu=601/mcpu=603e/mcpu=604/mcpu=860/mcpu=7400 \
+mcpu=403/mcpu=505/mcpu=601/mcpu=603e/mcpu=604/mcpu=860/mcpu=7400/mcpu=8540 \
 Dmpc8260 \
 msoft-float
 
 MULTILIB_DIRNAMES	= \
-m403 m505 m601 m603e m604 m860 m7400 \
+m403 m505 m601 m603e m604 m860 m7400 m8540 \
 mpc8260 \
 nof
 
@@ -29,6 +29,10 @@
 # Map 750 to .
 MULTILIB_MATCHES	+= mcpu?750=
 
+# Map e500, 8548 to 8540
+MULTILIB_MATCHES	+= mcpu?8540=mcpu?e500
+MULTILIB_MATCHES	+= mcpu?8540=mcpu?8548
+
 # Soft-float only, default implies msoft-float
 # NOTE: Must match with MULTILIB_MATCHES_FLOAT and MULTILIB_MATCHES
 MULTILIB_SOFTFLOAT_ONLY = \
@@ -62,3 +66,4 @@
 MULTILIB_EXCEPTIONS += *mcpu=750/Dmpc*
 MULTILIB_EXCEPTIONS += *mcpu=860/Dmpc*
 MULTILIB_EXCEPTIONS += *mcpu=7400/Dmpc*
+MULTILIB_EXCEPTIONS += *mcpu=8540/Dmpc*
diff -Naur gcc-4.4.2.orig/gcc/config.gcc gcc-4.4.2-rtems4.10-20091015/gcc/config.gcc
--- gcc-4.4.2.orig/gcc/config.gcc	2009-09-13 15:01:13.000000000 +0200
+++ gcc-4.4.2-rtems4.10-20091015/gcc/config.gcc	2009-10-15 18:36:00.000000000 +0200
@@ -1364,6 +1364,23 @@
         out_file=iq2000/iq2000.c
         md_file=iq2000/iq2000.md
         ;;
+lm32-*-elf*)
+	tm_file="dbxelf.h elfos.h ${tm_file}"
+	tmake_file="lm32/t-lm32"
+	tmake_file="${tmake_file} lm32/t-fprules-softfp soft-fp/t-softfp"
+        ;;
+lm32-*-rtems*)
+	tm_file="dbxelf.h elfos.h ${tm_file} lm32/rtems.h rtems.h"
+	tmake_file="lm32/t-lm32"
+	tmake_file="${tmake_file} lm32/t-fprules-softfp soft-fp/t-softfp"
+	tmake_file="${tmake_file} t-rtems"
+	extra_parts="crtbegin.o crtend.o crti.o crtn.o"
+        ;;
+lm32-*-uclinux*)
+	tm_file="dbxelf.h elfos.h ${tm_file} linux.h lm32/uclinux-elf.h"
+	tmake_file="lm32/t-lm32"
+	tmake_file="${tmake_file} lm32/t-fprules-softfp soft-fp/t-softfp"
+        ;;
 m32r-*-elf*)
 	tm_file="dbxelf.h elfos.h svr4.h ${tm_file}"
 	extra_parts="crtinit.o crtfini.o"
diff -Naur gcc-4.4.2.orig/gcc/config.gcc.orig gcc-4.4.2-rtems4.10-20091015/gcc/config.gcc.orig
--- gcc-4.4.2.orig/gcc/config.gcc.orig	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/gcc/config.gcc.orig	2009-10-15 18:36:00.000000000 +0200
@@ -0,0 +1,3183 @@
+# GCC target-specific configuration file.
+# Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
+# 2008, 2009 Free Software Foundation, Inc.
+
+#This file is part of GCC.
+
+#GCC is free software; you can redistribute it and/or modify it under
+#the terms of the GNU General Public License as published by the Free
+#Software Foundation; either version 3, or (at your option) any later
+#version.
+
+#GCC is distributed in the hope that it will be useful, but WITHOUT
+#ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+#FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+#for more details.
+
+#You should have received a copy of the GNU General Public License
+#along with GCC; see the file COPYING3.  If not see
+#<http://www.gnu.org/licenses/>.
+
+# This is the GCC target-specific configuration file
+# where a configuration type is mapped to different system-specific
+# definitions and files.  This is invoked by the autoconf-generated
+# configure script.  Putting it in a separate shell file lets us skip
+# running autoconf when modifying target-specific information.
+
+# When you change the cases in the OS or target switches, consider
+# updating ../libgcc/config.host also.
+
+# This file switches on the shell variable ${target}, and also uses the
+# following shell variables:
+#
+#  with_*		Various variables as set by configure.
+#
+#  enable_threads	Either the name, yes or no depending on whether
+#			threads support was requested.
+#
+#  default_use_cxa_atexit
+#			  The default value for the $enable___cxa_atexit
+#			variable.  enable___cxa_atexit needs to be set to
+#			"yes" for the correct operation of C++ destructors
+#			but it relies upon the presence of a non-standard C
+#			library	function called	__cxa_atexit.
+#			  Since not all C libraries provide __cxa_atexit the
+#			default value of $default_use_cxa_atexit is set to
+#			"no" except for targets which are known to be OK.
+#
+#  gas_flag		Either yes or no depending on whether GNU as was
+#			requested.
+#
+#  gnu_ld_flag		Either yes or no depending on whether GNU ld was
+#			requested.
+
+# This file sets the following shell variables for use by the
+# autoconf-generated configure script:
+#
+#  cpu_type		The name of the cpu, if different from the first
+#			chunk of the canonical target name.
+#
+#  tm_defines		List of target macros to define for all compilations.
+#
+#  tm_file		A list of target macro files, if different from
+#			"$cpu_type/$cpu_type.h". Usually it's constructed
+#			per target in a way like this:
+#			tm_file="${tm_file} dbxelf.h elfos.h svr4.h ${cpu_type.h}/elf.h"
+#			Note that the preferred order is:
+#			- specific target header "${cpu_type}/${cpu_type.h}"
+#			- generic headers like dbxelf.h elfos.h, etc.
+#			- specializing target headers like ${cpu_type.h}/elf.h
+#			This helps to keep OS specific stuff out of the CPU
+#			defining header ${cpu_type}/${cpu_type.h}.
+#
+#			It is possible to include automatically-generated
+#			build-directory files by prefixing them with "./".
+#			All other files should relative to $srcdir/config.
+#
+#  tm_p_file		Location of file with declarations for functions
+#			in $out_file.
+#
+#  out_file		The name of the machine description C support
+#			file, if different from "$cpu_type/$cpu_type.c".
+#
+#  md_file		The name of the machine-description file, if
+#			different from "$cpu_type/$cpu_type.md".
+#
+#  tmake_file		A list of machine-description-specific
+#			makefile-fragments, if different from
+#			"$cpu_type/t-$cpu_type".
+#
+#  extra_modes          The name of the file containing a list of extra
+#                       machine modes, if necessary and different from
+#                       "$cpu_type/$cpu_type-modes.def".
+#
+#  extra_objs		List of extra objects that should be linked into
+#			the compiler proper (cc1, cc1obj, cc1plus)
+#			depending on target.
+#
+#  extra_gcc_objs	List of extra objects that should be linked into
+#			the compiler driver (gcc) depending on target.
+#
+#  extra_headers	List of used header files from the directory
+#			config/${cpu_type}.
+#
+#  use_gcc_tgmath	If set, add tgmath.h to the list of used header
+#			files.
+#
+#  extra_passes		List of extra executables compiled for this target
+#			machine, used for compiling from source to object.
+#
+#  extra_parts		List of extra object files that should be compiled
+#			for this target machine.
+#
+#  extra_programs	Like extra_passes, but these are used when linking.
+#
+#  extra_options	List of target-dependent .opt files.
+#
+#  c_target_objs	List of extra target-dependent objects that be
+#			linked into the C compiler only.
+#
+#  cxx_target_objs	List of extra target-dependent objects that be
+#			linked into the C++ compiler only.
+#
+#  fortran_target_objs	List of extra target-dependent objects that be
+#			linked into the fortran compiler only.
+#
+#  target_gtfiles       List of extra source files with type information.
+#
+#  xm_defines		List of macros to define when compiling for the
+#			target machine.
+#
+#  xm_file		List of files to include when compiling for the
+#			target machine.
+#
+#  use_collect2		Set to yes or no, depending on whether collect2
+#			will be used.
+#
+#  target_cpu_default	Set to override the default target model.
+#
+#  gdb_needs_out_file_path
+#			Set to yes if gdb needs a dir command with
+#			`dirname $out_file`.
+#
+#  thread_file		Set to control which thread package to use.
+#
+#  gas			Set to yes or no depending on whether the target
+#			system normally uses GNU as.
+#
+#  need_64bit_hwint	Set to yes if HOST_WIDE_INT must be 64 bits wide
+#			for this target.  This is true if this target
+#			supports "long" or "wchar_t" wider than 32 bits,
+#			or BITS_PER_WORD is wider than 32 bits.
+#			The setting made here must match the one made in
+#			other locations such as libcpp/configure.ac
+#
+#  configure_default_options
+#			Set to an initializer for configure_default_options
+#			in configargs.h, based on --with-cpu et cetera.
+#
+#  use_fixproto		Set to "yes" if fixproto should be run normally,
+#			"no" if fixproto should never be run.
+
+# The following variables are used in each case-construct to build up the
+# outgoing variables:
+#
+#  gnu_ld		Set to yes or no depending on whether the target
+#			system normally uses GNU ld.
+
+out_file=
+tmake_file=
+extra_headers=
+use_gcc_tgmath=yes
+extra_passes=
+extra_parts=
+extra_programs=
+extra_objs=
+extra_gcc_objs=
+extra_options=
+c_target_objs=
+cxx_target_objs=
+fortran_target_objs=
+tm_defines=
+xm_defines=
+# Set this to force installation and use of collect2.
+use_collect2=
+# Set this to override the default target model.
+target_cpu_default=
+# Set this if gdb needs a dir command with `dirname $out_file`
+gdb_needs_out_file_path=
+# Set this to control which thread package will be used.
+thread_file=
+# Reinitialize these from the flag values every loop pass, since some
+# configure entries modify them.
+gas="$gas_flag"
+gnu_ld="$gnu_ld_flag"
+default_use_cxa_atexit=no
+target_gtfiles=
+need_64bit_hwint=
+
+# Default to not using fixproto.  Targets which need fixproto should
+# specifically set this to 'yes'.
+use_fixproto=no
+
+# Don't carry these over build->host->target.  Please.
+xm_file=
+md_file=
+
+# Obsolete configurations.
+case ${target} in
+# Avoid generic cases below matching.
+   h8300-*-rtems* | h8300-*-elf* \
+ | sh-*-elf* | sh-*-symbianelf* | sh-*-linux* | sh-*-netbsdelf* \
+ | sh-*-rtems* | sh-wrs-vxworks) ;;
+   arm-*-coff*		\
+ | armel-*-coff*	\
+ | h8300-*-*		\
+ | i[34567]86-*-aout*	\
+ | i[34567]86-*-coff*	\
+ | m68k-*-aout*		\
+ | m68k-*-coff*		\
+ | sh-*-*		\
+ | pdp11-*-bsd		\
+ | rs6000-ibm-aix4.[12]* \
+ | powerpc-ibm-aix4.[12]* \
+ )
+    if test "x$enable_obsolete" != xyes; then
+      echo "*** Configuration ${target} is obsolete." >&2
+      echo "*** Specify --enable-obsolete to build it anyway." >&2
+      echo "*** Support will be REMOVED in the next major release of GCC," >&2
+      echo "*** unless a maintainer comes forward." >&2
+      exit 1
+    fi;;
+esac
+
+# Unsupported targets list.  Do not put an entry in this list unless
+# it would otherwise be caught by a more permissive pattern.  The list
+# should be in alphabetical order.
+case ${target} in
+   i[34567]86-go32-*			\
+ | i[34567]86-*-go32*			\
+ | mips64orion*-*-rtems*		\
+ | sparc-hal-solaris2*			\
+ | thumb-*-*				\
+ | *-*-linux*aout*			\
+ | *-*-linux*coff*			\
+ | *-*-linux*libc1*			\
+ | *-*-linux*oldld*			\
+ | *-*-rtemsaout*			\
+ | *-*-rtemscoff*			\
+ | *-*-solaris2.[0-6]			\
+ | *-*-solaris2.[0-6].*			\
+ | *-*-sysv*		\
+ | vax-*-vms*				\
+ )
+	echo "*** Configuration ${target} not supported" 1>&2
+	exit 1
+	;;
+esac
+
+# Set default cpu_type, tm_file, tm_p_file and xm_file so it can be
+# updated in each machine entry.  Also set default extra_headers for some
+# machines.
+tm_p_file=
+cpu_type=`echo ${target} | sed 's/-.*$//'`
+cpu_is_64bit=
+case ${target} in
+m32c*-*-*)
+        cpu_type=m32c
+	tmake_file=m32c/t-m32c
+        ;;
+alpha*-*-*)
+	cpu_type=alpha
+	need_64bit_hwint=yes
+	;;
+am33_2.0-*-linux*)
+	cpu_type=mn10300
+	;;
+arm*-*-*)
+	cpu_type=arm
+	extra_headers="mmintrin.h arm_neon.h"
+	c_target_objs="arm-c.o"
+	cxx_target_objs="arm-c.o"
+	;;
+bfin*-*)
+	cpu_type=bfin
+	;;
+crisv32-*)
+	cpu_type=cris
+	;;
+frv*)	cpu_type=frv
+	;;
+fido-*-*)
+	cpu_type=m68k
+	extra_headers=math-68881.h
+        ;;
+i[34567]86-*-*)
+	cpu_type=i386
+	c_target_objs="i386-c.o"
+	cxx_target_objs="i386-c.o"
+	extra_headers="cpuid.h mmintrin.h mm3dnow.h xmmintrin.h emmintrin.h
+		       pmmintrin.h tmmintrin.h ammintrin.h smmintrin.h
+		       nmmintrin.h bmmintrin.h mmintrin-common.h
+		       wmmintrin.h immintrin.h x86intrin.h avxintrin.h 
+		       cross-stdarg.h"
+	;;
+x86_64-*-*)
+	cpu_type=i386
+	c_target_objs="i386-c.o"
+	cxx_target_objs="i386-c.o"
+	extra_headers="cpuid.h mmintrin.h mm3dnow.h xmmintrin.h emmintrin.h
+		       pmmintrin.h tmmintrin.h ammintrin.h smmintrin.h
+		       nmmintrin.h bmmintrin.h mmintrin-common.h
+		       wmmintrin.h immintrin.h x86intrin.h avxintrin.h 
+		       cross-stdarg.h"
+	need_64bit_hwint=yes
+	;;
+ia64-*-*)
+	extra_headers=ia64intrin.h
+	need_64bit_hwint=yes
+	;;
+hppa*-*-*)
+	cpu_type=pa
+	;;
+m32r*-*-*)
+        cpu_type=m32r
+        ;;
+m68k-*-*)
+	extra_headers=math-68881.h
+	;;
+mips*-*-*)
+	cpu_type=mips
+	need_64bit_hwint=yes
+	extra_headers="loongson.h"
+	;;
+picochip-*-*)
+        cpu_type=picochip
+        ;;
+powerpc*-*-*)
+	cpu_type=rs6000
+	extra_headers="ppc-asm.h altivec.h spe.h ppu_intrinsics.h paired.h spu2vmx.h vec_types.h si2vmx.h"
+	need_64bit_hwint=yes
+	case x$with_cpu in
+	    xpowerpc64|xdefault64|x6[23]0|x970|xG5|xpower[34567]|xpower6x|xrs64a|xcell)
+		cpu_is_64bit=yes
+		;;
+	esac
+	;;
+rs6000*-*-*)
+	need_64bit_hwint=yes
+	;;
+score*-*-*)
+	cpu_type=score
+	;;
+sparc*-*-*)
+	cpu_type=sparc
+	need_64bit_hwint=yes
+	;;
+spu*-*-*)
+	cpu_type=spu
+	need_64bit_hwint=yes
+	;;
+s390*-*-*)
+	cpu_type=s390
+	need_64bit_hwint=yes
+	;;
+# Note the 'l'; we need to be able to match e.g. "shle" or "shl".
+sh[123456789lbe]*-*-* | sh-*-*)
+	cpu_type=sh
+	need_64bit_hwint=yes
+	;;
+esac
+
+tm_file=${cpu_type}/${cpu_type}.h
+if test -f ${srcdir}/config/${cpu_type}/${cpu_type}-protos.h
+then
+	tm_p_file=${cpu_type}/${cpu_type}-protos.h
+fi
+extra_modes=
+if test -f ${srcdir}/config/${cpu_type}/${cpu_type}-modes.def
+then
+	extra_modes=${cpu_type}/${cpu_type}-modes.def
+fi
+if test -f ${srcdir}/config/${cpu_type}/${cpu_type}.opt
+then
+	extra_options="${extra_options} ${cpu_type}/${cpu_type}.opt"
+fi
+
+case ${target} in
+i[34567]86-*-*)
+	if test "x$enable_cld" = xyes; then
+		tm_defines="${tm_defines} USE_IX86_CLD=1"
+	fi
+	;;
+x86_64-*-*)
+	tm_file="i386/biarch64.h ${tm_file}"
+	if test "x$enable_cld" = xyes; then
+		tm_defines="${tm_defines} USE_IX86_CLD=1"
+	fi
+	;;
+esac
+
+# On a.out targets, we need to use collect2.
+case ${target} in
+*-*-*aout*)
+	use_collect2=yes
+	;;
+esac
+
+# Common parts for widely ported systems.
+case ${target} in
+*-*-darwin*)
+  tm_file="${tm_file} darwin.h"
+  case ${target} in
+  *-*-darwin[912]*)
+    tm_file="${tm_file} darwin9.h"
+    ;;
+  esac
+  tm_file="${tm_file} ${cpu_type}/darwin.h"
+  tm_p_file="${tm_p_file} darwin-protos.h"
+  tmake_file="t-darwin ${cpu_type}/t-darwin t-slibgcc-darwin"
+  target_gtfiles="\$(srcdir)/config/darwin.c"
+  extra_options="${extra_options} darwin.opt"
+  c_target_objs="${c_target_objs} darwin-c.o"
+  cxx_target_objs="${cxx_target_objs} darwin-c.o"
+  fortran_target_objs="darwin-f.o"
+  extra_objs="darwin.o"
+  extra_gcc_objs="darwin-driver.o"
+  default_use_cxa_atexit=yes
+  case ${enable_threads} in
+    "" | yes | posix) thread_file='posix' ;;
+  esac
+  ;;
+*-*-freebsd[12] | *-*-freebsd[12].* | *-*-freebsd*aout*)
+  # This is the place-holder for the generic a.out configuration
+  # of FreeBSD.  No actual configuration resides here since
+  # there was only ever a bare-bones ix86 configuration for
+  # a.out and it exists solely in the machine-specific section.
+  # This place-holder must exist to avoid dropping into
+  # the generic ELF configuration of FreeBSD (i.e. it must be
+  # ordered before that section).
+  ;;
+*-*-freebsd*)
+  # This is the generic ELF configuration of FreeBSD.  Later
+  # machine-specific sections may refine and add to this
+  # configuration.
+  #
+  # Due to tm_file entry ordering issues that vary between cpu
+  # architectures, we only define fbsd_tm_file to allow the
+  # machine-specific section to dictate the final order of all
+  # entries of tm_file with the minor exception that components
+  # of the tm_file set here will always be of the form:
+  #
+  # freebsd<version_number>.h [freebsd-<conf_option>.h ...] freebsd-spec.h freebsd.h
+  #
+  # The machine-specific section should not tamper with this
+  # ordering but may order all other entries of tm_file as it
+  # pleases around the provided core setting.
+  gas=yes
+  gnu_ld=yes
+  extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o"
+  fbsd_major=`echo ${target} | sed -e 's/.*freebsd//g' | sed -e 's/\..*//g'`
+  tm_defines="${tm_defines} FBSD_MAJOR=${fbsd_major}"
+  tmake_file="t-slibgcc-elf-ver t-freebsd"
+  case ${enable_threads} in
+    no)
+      fbsd_tm_file="${fbsd_tm_file} freebsd-nthr.h"
+      ;;
+    "" | yes | posix)
+      thread_file='posix'
+      tmake_file="${tmake_file} t-freebsd-thread"
+      # Before 5.0, FreeBSD can't bind shared libraries to -lc
+      # when "optionally" threaded via weak pthread_* checks.
+      case ${target} in
+        *-*-freebsd[34] | *-*-freebsd[34].*)
+          tmake_file="${tmake_file} t-slibgcc-nolc-override"
+          ;;
+      esac
+      ;;
+    *)
+      echo 'Unknown thread configuration for FreeBSD'
+      exit 1
+      ;;
+  esac
+  fbsd_tm_file="${fbsd_tm_file} freebsd-spec.h freebsd.h"
+  ;;
+*-*-linux* | frv-*-*linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu | *-*-gnu* | *-*-kopensolaris*-gnu)
+  extra_parts="crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o"
+  gas=yes
+  gnu_ld=yes
+  case ${enable_threads} in
+    "" | yes | posix) thread_file='posix' ;;
+  esac
+  tmake_file="t-slibgcc-elf-ver t-linux"
+  case $target in
+    *-*-linux* | frv-*-*linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu | *-*-kopensolaris*-gnu)
+      :;;
+    *-*-gnu*)
+      tmake_file="$tmake_file t-gnu";;
+  esac
+  # glibc / uclibc switch.  uclibc isn't usable for GNU/Hurd and neither for
+  # GNU/k*BSD.
+  case $target in
+    *linux*)
+      extra_options="$extra_options linux.opt";;
+    *)
+      tm_defines="$tm_defines OPTION_GLIBC=1";;
+  esac
+  case ${target} in
+    *-*-*uclibc*)
+      tm_defines="${tm_defines} UCLIBC_DEFAULT=1"
+      ;;
+    *)
+      tm_defines="${tm_defines} UCLIBC_DEFAULT=0"
+      ;;
+  esac
+  # Assume that glibc or uClibc are being used and so __cxa_atexit is provided.
+  default_use_cxa_atexit=yes
+  use_gcc_tgmath=no
+  ;;
+*-*-netbsd*)
+  tmake_file="t-slibgcc-elf-ver t-libc-ok t-netbsd t-libgcc-pic"
+  gas=yes
+  gnu_ld=yes
+
+  # NetBSD 2.0 and later get POSIX threads enabled by default.
+  # Allow them to be explicitly enabled on any other version.
+  case ${enable_threads} in
+    "")
+      case ${target} in
+        *-*-netbsd[2-9]* | *-*-netbsdelf[2-9]*)
+          thread_file='posix'
+          tm_defines="${tm_defines} NETBSD_ENABLE_PTHREADS"
+          ;;
+      esac
+      ;;
+    yes | posix)
+      thread_file='posix'
+      tm_defines="${tm_defines} NETBSD_ENABLE_PTHREADS"
+      ;;
+  esac
+
+  # NetBSD 1.7 and later are set up to use GCC's crtstuff for
+  # ELF configurations.  We will clear extra_parts in the
+  # a.out configurations.
+  case ${target} in
+    *-*-netbsd*1.[7-9]* | *-*-netbsd[2-9]* | *-*-netbsdelf[2-9]*)
+      extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtbeginT.o"
+      ;;
+  esac
+
+  # NetBSD 2.0 and later provide __cxa_atexit(), which we use by
+  # default (unless overridden by --disable-__cxa_atexit).
+  case ${target} in
+    *-*-netbsd[2-9]* | *-*-netbsdelf[2-9]*)
+      default_use_cxa_atexit=yes
+      ;;
+  esac
+  ;;
+*-*-openbsd*)
+  tmake_file="t-libc-ok t-openbsd t-libgcc-pic"
+  case ${enable_threads} in
+    yes)
+      thread_file='posix'
+      tmake_file="${tmake_file} t-openbsd-thread"
+      ;;
+  esac
+  case ${target} in
+    *-*-openbsd2.*|*-*-openbsd3.[012])
+      tm_defines="${tm_defines} HAS_LIBC_R=1" ;;
+  esac
+  ;;
+*-*-rtems*)
+  case ${enable_threads} in
+    yes) thread_file='rtems' ;;
+  esac
+  ;;
+*-*-vxworks*)
+  tmake_file=t-vxworks
+  xm_defines=POSIX
+  extra_options="${extra_options} vxworks.opt"
+  extra_objs=vxworks.o
+  case ${enable_threads} in
+    no) ;;
+    "" | yes | vxworks) thread_file='vxworks' ;;
+    *) echo 'Unknown thread configuration for VxWorks'; exit 1 ;;
+  esac
+  ;;
+*-*-elf)
+  # Assume that newlib is being used and so __cxa_atexit is provided.
+  default_use_cxa_atexit=yes
+  ;;
+esac
+
+case ${target} in
+# Support site-specific machine types.
+*local*)
+	rest=`echo ${target} | sed -e "s/$cpu_type-//"`
+	tm_file=${cpu_type}/$rest.h
+	if test -f $srcdir/config/${cpu_type}/xm-$rest.h
+	then xm_file=${cpu_type}/xm-$rest.h
+	fi
+	if test -f $srcdir/config/${cpu_type}/t-$rest
+	then tmake_file=${cpu_type}/t-$rest
+	fi
+	;;
+alpha*-*-linux*)
+	tm_file="${tm_file} alpha/elf.h alpha/linux.h alpha/linux-elf.h"
+	target_cpu_default="MASK_GAS"
+	tmake_file="${tmake_file} alpha/t-crtfm alpha/t-alpha alpha/t-ieee alpha/t-linux"
+	;;
+alpha*-*-gnu*)
+	tm_file="$tm_file alpha/elf.h alpha/linux.h alpha/linux-elf.h gnu.h alpha/gnu.h"
+	target_cpu_default="MASK_GAS"
+	tmake_file="${tmake_file} alpha/t-crtfm alpha/t-alpha alpha/t-ieee"
+	;;
+alpha*-*-freebsd*)
+	tm_file="${tm_file} ${fbsd_tm_file} alpha/elf.h alpha/freebsd.h"
+	target_cpu_default="MASK_GAS"
+	tmake_file="${tmake_file} alpha/t-crtfm alpha/t-alpha alpha/t-ieee"
+	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtbeginT.o"
+	;;
+alpha*-*-netbsd*)
+	tm_file="${tm_file} netbsd.h alpha/elf.h netbsd-elf.h alpha/netbsd.h"
+	target_cpu_default="MASK_GAS"
+	tmake_file="${tmake_file} alpha/t-alpha alpha/t-ieee"
+	;;
+alpha*-*-openbsd*)
+	tm_defines="${tm_defines} OBSD_NO_DYNAMIC_LIBRARIES OBSD_HAS_DECLARE_FUNCTION_NAME OBSD_HAS_DECLARE_FUNCTION_SIZE OBSD_HAS_DECLARE_OBJECT"
+	tm_file="alpha/alpha.h openbsd.h alpha/openbsd.h"
+	# default x-alpha is only appropriate for dec-osf.
+	target_cpu_default="MASK_GAS"
+	tmake_file="alpha/t-alpha alpha/t-ieee"
+	;;
+alpha*-dec-osf[45]*)
+	if test x$stabs = xyes
+	then
+		tm_file="${tm_file} dbx.h"
+	fi
+	if test x$gas != xyes
+	then
+		extra_passes="mips-tfile mips-tdump"
+	fi
+	use_collect2=yes
+	tmake_file="alpha/t-alpha alpha/t-ieee alpha/t-crtfm alpha/t-osf4"
+	tm_file="${tm_file} alpha/osf.h"
+	extra_headers=va_list.h
+	case ${target} in
+	  *-*-osf4*)
+	    # Define TARGET_SUPPORT_ARCH except on 4.0a.
+	    case ${target} in
+		*-*-osf4.0a) ;;
+		*) tm_defines="${tm_defines} TARGET_SUPPORT_ARCH=1"
+	    esac
+	    ;;
+	  *-*-osf5*)
+	    tm_file="${tm_file} alpha/osf5.h"
+	    tm_defines="${tm_defines} TARGET_SUPPORT_ARCH=1"
+	    ;;
+	esac
+	case ${enable_threads} in
+	  "" | yes | posix)
+	    thread_file='posix'
+	    tmake_file="${tmake_file} alpha/t-osf-pthread"
+	    ;;
+	esac
+	;;
+alpha64-dec-*vms*)
+	tm_file="${tm_file} alpha/vms.h alpha/vms64.h"
+	xm_file="alpha/xm-vms.h"
+	tmake_file="alpha/t-alpha alpha/t-vms alpha/t-vms64 alpha/t-ieee"
+	prefix=/gnu
+	local_prefix=/gnu
+	;;
+alpha*-dec-*vms*)
+	tm_file="${tm_file} alpha/vms.h"
+	xm_file=alpha/xm-vms.h
+	tmake_file="alpha/t-alpha alpha/t-vms alpha/t-ieee"
+	prefix=/gnu
+	local_prefix=/gnu
+	;;
+arc-*-elf*)
+	tm_file="dbxelf.h elfos.h svr4.h ${tm_file}"
+	extra_parts="crtinit.o crtfini.o"
+	;;
+arm-*-coff* | armel-*-coff*)
+	tm_file="arm/semi.h arm/aout.h arm/arm.h arm/coff.h dbxcoff.h"
+	tmake_file="arm/t-arm arm/t-arm-coff"
+	;;
+arm-wrs-vxworks)
+	tm_file="elfos.h arm/elf.h arm/aout.h ${tm_file} vx-common.h vxworks.h arm/vxworks.h"
+	tmake_file="${tmake_file} arm/t-arm arm/t-vxworks"
+	;;
+arm*-*-freebsd*)
+	tm_file="dbxelf.h elfos.h ${fbsd_tm_file} arm/elf.h arm/aout.h arm/freebsd.h arm/arm.h"
+	tmake_file="${tmake_file} arm/t-arm arm/t-strongarm-elf"
+	;;
+arm*-*-netbsdelf*)
+	tm_file="dbxelf.h elfos.h netbsd.h netbsd-elf.h arm/elf.h arm/aout.h arm/arm.h arm/netbsd-elf.h"
+	tmake_file="${tmake_file} arm/t-arm arm/t-netbsd"
+	;;
+arm*-*-netbsd*)
+	tm_file="arm/aout.h arm/arm.h netbsd.h netbsd-aout.h arm/netbsd.h"
+	tmake_file="t-netbsd arm/t-arm arm/t-netbsd"
+	extra_parts=""
+	use_collect2=yes
+	;;
+arm*-*-linux*)			# ARM GNU/Linux with ELF
+	tm_file="dbxelf.h elfos.h linux.h arm/elf.h arm/linux-gas.h arm/linux-elf.h"
+	case $target in
+	arm*b-*)
+		tm_defines="${tm_defines} TARGET_BIG_ENDIAN_DEFAULT=1"
+		;;
+	esac
+	tmake_file="${tmake_file} t-linux arm/t-arm"
+	case ${target} in
+	arm*-*-linux-*eabi)
+	    tm_file="$tm_file arm/bpabi.h arm/linux-eabi.h"
+	    tmake_file="$tmake_file arm/t-arm-elf arm/t-bpabi arm/t-linux-eabi"
+  	    # The BPABI long long divmod functions return a 128-bit value in
+	    # registers r0-r3.  Correctly modeling that requires the use of
+	    # TImode.
+	    need_64bit_hwint=yes
+	    # The EABI requires the use of __cxa_atexit.
+	    default_use_cxa_atexit=yes
+	    ;;
+	*)
+	    tmake_file="$tmake_file arm/t-linux"
+	    ;;
+	esac
+	tm_file="$tm_file arm/aout.h arm/arm.h"
+	tmake_file="${tmake_file} arm/t-arm-softfp soft-fp/t-softfp"
+	;;
+arm*-*-uclinux*)		# ARM ucLinux
+	tm_file="dbxelf.h elfos.h arm/unknown-elf.h arm/elf.h arm/linux-gas.h arm/uclinux-elf.h"
+	tmake_file="arm/t-arm arm/t-arm-elf"
+	case ${target} in
+	arm*-*-uclinux*eabi)
+	    tm_file="$tm_file arm/bpabi.h arm/uclinux-eabi.h"
+	    tmake_file="$tmake_file arm/t-bpabi"
+  	    # The BPABI long long divmod functions return a 128-bit value in
+	    # registers r0-r3.  Correctly modeling that requires the use of
+	    # TImode.
+	    need_64bit_hwint=yes
+	    # The EABI requires the use of __cxa_atexit.
+	    default_use_cxa_atexit=yes
+	esac
+	tm_file="$tm_file arm/aout.h arm/arm.h"
+	tmake_file="${tmake_file} arm/t-arm-softfp soft-fp/t-softfp"
+	;;
+arm*-*-ecos-elf)
+	tm_file="dbxelf.h elfos.h arm/unknown-elf.h arm/elf.h arm/aout.h arm/arm.h arm/ecos-elf.h"
+	tmake_file="arm/t-arm arm/t-arm-elf"
+	tmake_file="${tmake_file} arm/t-arm-softfp soft-fp/t-softfp"
+	;;
+arm*-*-eabi* | arm*-*-symbianelf* )
+	# The BPABI long long divmod functions return a 128-bit value in
+	# registers r0-r3.  Correctly modeling that requires the use of
+	# TImode.
+	need_64bit_hwint=yes
+	default_use_cxa_atexit=yes
+	tm_file="dbxelf.h elfos.h arm/unknown-elf.h arm/elf.h arm/bpabi.h"
+	tmake_file="arm/t-arm arm/t-arm-elf"
+	case ${target} in
+	arm*-*-eabi*)
+	  tm_file="$tm_file arm/eabi.h"
+	  tmake_file="${tmake_file} arm/t-bpabi"
+	  extra_options="${extra_options} arm/eabi.opt"
+	  ;;
+	arm*-*-symbianelf*)
+	  tm_file="${tm_file} arm/symbian.h"
+	  # We do not include t-bpabi for Symbian OS because the system
+	  # provides its own implementation of the BPABI functions.
+	  tmake_file="${tmake_file} arm/t-symbian"
+	  ;;
+	esac
+	tm_file="${tm_file} arm/aout.h arm/arm.h"
+	tmake_file="${tmake_file} arm/t-arm-softfp soft-fp/t-softfp"
+	;;
+arm*-*-rtems*)
+	tm_file="dbxelf.h elfos.h arm/unknown-elf.h arm/elf.h arm/aout.h arm/arm.h arm/rtems-elf.h rtems.h"
+	tmake_file="arm/t-arm arm/t-arm-elf t-rtems arm/t-rtems"
+	tmake_file="${tmake_file} arm/t-arm-softfp soft-fp/t-softfp"
+	;;
+arm*-*-elf)
+	tm_file="dbxelf.h elfos.h arm/unknown-elf.h arm/elf.h arm/aout.h arm/arm.h"
+	tmake_file="arm/t-arm arm/t-arm-elf"
+	tmake_file="${tmake_file} arm/t-arm-softfp soft-fp/t-softfp"
+	;;
+arm*-wince-pe*)
+	tm_file="arm/semi.h arm/aout.h arm/arm.h arm/coff.h dbxcoff.h arm/pe.h arm/wince-pe.h"
+	tmake_file="arm/t-arm arm/t-wince-pe"
+	extra_options="${extra_options} arm/pe.opt"
+	extra_objs="pe.o"
+	;;
+arm-*-pe*)
+	tm_file="arm/semi.h arm/aout.h arm/arm.h arm/coff.h dbxcoff.h arm/pe.h"
+	tmake_file="arm/t-arm arm/t-pe"
+	extra_options="${extra_options} arm/pe.opt"
+	extra_objs="pe.o"
+	;;
+avr-*-rtems*)
+	tm_file="avr/avr.h dbxelf.h avr/rtems.h rtems.h"
+	tmake_file="avr/t-avr t-rtems avr/t-rtems"
+	;;
+avr-*-*)
+	tm_file="avr/avr.h dbxelf.h"
+	;;
+bfin*-elf*)
+	tm_file="${tm_file} dbxelf.h elfos.h bfin/elf.h"
+	tmake_file=bfin/t-bfin-elf
+	use_collect2=no
+	;;
+bfin*-uclinux*)
+	tm_file="${tm_file} dbxelf.h elfos.h bfin/elf.h linux.h bfin/uclinux.h"
+	tmake_file=bfin/t-bfin-uclinux
+	tm_defines="${tm_defines} UCLIBC_DEFAULT=1"
+	extra_options="${extra_options} linux.opt"
+	use_collect2=no
+	;;
+bfin*-linux-uclibc*)
+	tm_file="${tm_file} dbxelf.h elfos.h bfin/elf.h linux.h bfin/linux.h ./linux-sysroot-suffix.h"
+	tmake_file="t-slibgcc-elf-ver bfin/t-bfin-linux"
+	extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"
+	use_collect2=no
+	;;
+bfin*-rtems*)
+	tm_file="${tm_file} dbxelf.h elfos.h bfin/elf.h bfin/rtems.h rtems.h"
+	tmake_file="bfin/t-bfin t-rtems bfin/t-rtems"
+	;;
+bfin*-*)
+	tm_file="${tm_file} dbxelf.h elfos.h bfin/elf.h"
+	tmake_file=bfin/t-bfin
+	use_collect2=no
+	;;
+crisv32-*-elf | crisv32-*-none)
+	tm_file="dbxelf.h elfos.h ${tm_file}"
+	tmake_file="cris/t-cris"
+	target_cpu_default=32
+	gas=yes
+	extra_options="${extra_options} cris/elf.opt"
+	;;
+cris-*-elf | cris-*-none)
+	tm_file="dbxelf.h elfos.h ${tm_file}"
+	tmake_file="cris/t-cris cris/t-elfmulti"
+	gas=yes
+	extra_options="${extra_options} cris/elf.opt"
+	;;
+crisv32-*-linux* | cris-*-linux*)
+	tm_file="dbxelf.h elfos.h svr4.h ${tm_file} linux.h cris/linux.h"
+	# We need to avoid using t-linux, so override default tmake_file
+	tmake_file="cris/t-cris t-slibgcc-elf-ver cris/t-linux"
+	extra_options="${extra_options} cris/linux.opt"
+	case $target in
+	  cris-*-*)
+		target_cpu_default=10
+		;;
+	  crisv32-*-*)
+		target_cpu_default=32
+		;;
+	esac
+	;;
+crx-*-elf)
+	tm_file="elfos.h ${tm_file}"
+	extra_parts="crtbegin.o crtend.o"
+	use_collect2=no
+	;;
+fr30-*-elf)
+	tm_file="dbxelf.h elfos.h svr4.h ${tm_file}"
+	tmake_file=fr30/t-fr30
+	extra_parts="crti.o crtn.o crtbegin.o crtend.o"
+	;;
+frv-*-elf)
+	tm_file="dbxelf.h elfos.h svr4.h ${tm_file} frv/frv-abi.h"
+	tmake_file=frv/t-frv
+	;;
+frv-*-*linux*)
+	tm_file="dbxelf.h elfos.h svr4.h ${tm_file} \
+	         linux.h frv/linux.h frv/frv-abi.h"
+	tmake_file="${tmake_file} frv/t-frv frv/t-linux"
+	;;
+h8300-*-rtems*)
+	tmake_file="h8300/t-h8300 h8300/t-elf t-rtems h8300/t-rtems"
+	tm_file="h8300/h8300.h dbxelf.h elfos.h h8300/elf.h h8300/rtems.h rtems.h"
+	;;
+h8300-*-elf*)
+	tmake_file="h8300/t-h8300 h8300/t-elf"
+	tm_file="h8300/h8300.h dbxelf.h elfos.h h8300/elf.h"
+	;;
+h8300-*-*)
+	tm_file="h8300/h8300.h dbxcoff.h h8300/coff.h"
+	;;
+hppa*64*-*-linux*)
+	target_cpu_default="MASK_PA_11|MASK_PA_20"
+	tm_file="pa/pa64-start.h ${tm_file} dbxelf.h elfos.h svr4.h linux.h \
+		 pa/pa-linux.h pa/pa64-regs.h pa/pa-64.h pa/pa64-linux.h"
+	tmake_file="${tmake_file} pa/t-linux64"
+	gas=yes gnu_ld=yes
+	need_64bit_hwint=yes
+	;;
+hppa*-*-linux*)
+	target_cpu_default="MASK_PA_11|MASK_NO_SPACE_REGS"
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h linux.h pa/pa-linux.h \
+		 pa/pa32-regs.h pa/pa32-linux.h"
+	tmake_file="${tmake_file} pa/t-linux"
+	# Set the libgcc version number
+	if test x$sjlj = x1; then
+	    tmake_file="$tmake_file pa/t-slibgcc-sjlj-ver"
+	else
+	    tmake_file="$tmake_file pa/t-slibgcc-dwarf-ver"
+	fi
+	;;
+# port not yet contributed.
+#hppa*-*-openbsd*)
+#	target_cpu_default="MASK_PA_11"
+#	;;
+hppa[12]*-*-hpux10*)
+	case ${target} in
+	hppa1.1-*-* | hppa2*-*-*)
+		target_cpu_default="MASK_PA_11"
+		;;
+	esac
+	tm_file="${tm_file} pa/pa32-regs.h dbxelf.h pa/som.h \
+		 pa/pa-hpux.h pa/pa-hpux10.h"
+	extra_options="${extra_options} pa/pa-hpux.opt"
+	case ${target} in
+	*-*-hpux10.[1-9]*)
+		tm_file="${tm_file} pa/pa-hpux1010.h"
+		extra_options="${extra_options} pa/pa-hpux1010.opt"
+		;;
+	esac
+	tmake_file="pa/t-pa-hpux10 pa/t-pa-hpux pa/t-hpux-shlib"
+	case ${enable_threads} in
+	  "")
+	    if test x$have_pthread_h = xyes ; then
+	      tmake_file="${tmake_file} pa/t-dce-thr"
+	    fi
+	    ;;
+	  yes | dce)
+	    tmake_file="${tmake_file} pa/t-dce-thr"
+	    ;;
+	esac
+	# Set the libgcc version number
+	if test x$sjlj = x1; then
+	    tmake_file="$tmake_file pa/t-slibgcc-sjlj-ver"
+	else
+	    tmake_file="$tmake_file pa/t-slibgcc-dwarf-ver"
+	fi
+	use_collect2=yes
+	gas=yes
+	;;
+hppa*64*-*-hpux11*)
+	target_cpu_default="MASK_PA_11|MASK_PA_20"
+	if test x$gnu_ld = xyes
+	then
+		target_cpu_default="${target_cpu_default}|MASK_GNU_LD"
+	fi
+	tm_file="pa/pa64-start.h ${tm_file} dbxelf.h elfos.h \
+		 pa/pa64-regs.h pa/pa-hpux.h pa/pa-hpux1010.h \
+		 pa/pa-hpux11.h"
+	case ${target} in
+	*-*-hpux11.[1-9]*)
+		tm_file="${tm_file} pa/pa-hpux1111.h pa/pa-64.h pa/pa64-hpux.h"
+		extra_options="${extra_options} pa/pa-hpux1111.opt"
+		;;
+	*)
+		tm_file="${tm_file} pa/pa-64.h pa/pa64-hpux.h"
+		;;
+	esac
+	extra_options="${extra_options} pa/pa-hpux.opt \
+		       pa/pa-hpux1010.opt pa/pa64-hpux.opt"
+	need_64bit_hwint=yes
+	tmake_file="pa/t-pa64 pa/t-pa-hpux pa/t-hpux-shlib"
+	# Set the libgcc version number
+	if test x$sjlj = x1; then
+	    tmake_file="$tmake_file pa/t-slibgcc-sjlj-ver"
+	else
+	    tmake_file="$tmake_file pa/t-slibgcc-dwarf-ver"
+	fi
+	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtbeginT.o \
+		     libgcc_stub.a"
+	case x${enable_threads} in
+	x | xyes | xposix )
+		thread_file=posix
+		;;
+	esac
+	gas=yes
+	;;
+hppa[12]*-*-hpux11*)
+	case ${target} in
+	hppa1.1-*-* | hppa2*-*-*)
+		target_cpu_default="MASK_PA_11"
+		;;
+	esac
+	tm_file="${tm_file} pa/pa32-regs.h dbxelf.h pa/som.h \
+		 pa/pa-hpux.h pa/pa-hpux1010.h pa/pa-hpux11.h"
+	extra_options="${extra_options} pa/pa-hpux.opt pa/pa-hpux1010.opt"
+	case ${target} in
+	*-*-hpux11.[1-9]*)
+		tm_file="${tm_file} pa/pa-hpux1111.h"
+		extra_options="${extra_options} pa/pa-hpux1111.opt"
+		;;
+	esac
+	tmake_file="pa/t-pa-hpux11 pa/t-pa-hpux pa/t-hpux-shlib"
+	# Set the libgcc version number
+	if test x$sjlj = x1; then
+	    tmake_file="$tmake_file pa/t-slibgcc-sjlj-ver"
+	else
+	    tmake_file="$tmake_file pa/t-slibgcc-dwarf-ver"
+	fi
+	case x${enable_threads} in
+	x | xyes | xposix )
+		thread_file=posix
+		;;
+	esac
+	use_collect2=yes
+	gas=yes
+	;;
+i[34567]86-*-darwin*)
+	need_64bit_hwint=yes
+
+	# This is so that '.../configure && make' doesn't fail due to
+	# config.guess deciding that the configuration is i386-*-darwin* and
+	# then this file using that to set --with-cpu=i386 which has no -m64
+	# support.
+	with_cpu=${with_cpu:-generic}
+	tmake_file="${tmake_file} i386/t-crtpc i386/t-crtfm"
+	;;
+x86_64-*-darwin*)
+	with_cpu=${with_cpu:-generic}
+	tmake_file="${tmake_file} t-darwin ${cpu_type}/t-darwin64 t-slibgcc-darwin i386/t-crtpc i386/t-crtfm"
+	tm_file="${tm_file} ${cpu_type}/darwin64.h"
+	;;
+i[34567]86-*-elf*)
+	tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h i386/i386elf.h"
+	tmake_file="${tmake_file} i386/t-i386elf t-svr4"
+	;;
+x86_64-*-elf*)
+	tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h i386/i386elf.h i386/x86-64.h"
+	tmake_file="${tmake_file} i386/t-i386elf t-svr4"
+	;;
+i[34567]86-*-aout*)
+	tm_file="${tm_file} i386/unix.h i386/bsd.h i386/gas.h i386/gstabs.h i386/i386-aout.h"
+	;;
+i[34567]86-*-freebsd*)
+	tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h ${fbsd_tm_file} i386/freebsd.h"
+	;;
+x86_64-*-freebsd*)
+	tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h ${fbsd_tm_file} i386/x86-64.h i386/freebsd.h i386/freebsd64.h"
+	tmake_file="${tmake_file} i386/t-crtstuff"
+	;;
+i[34567]86-*-netbsdelf*)
+	tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h netbsd.h netbsd-elf.h i386/netbsd-elf.h"
+	;;
+i[34567]86-*-netbsd*)
+	tm_file="${tm_file} i386/unix.h i386/bsd.h i386/gas.h i386/gstabs.h netbsd.h netbsd-aout.h i386/netbsd.h"
+	tmake_file="${tmake_file} t-netbsd"
+	extra_parts=""
+	use_collect2=yes
+	;;
+x86_64-*-netbsd*)
+	tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h netbsd.h netbsd-elf.h i386/x86-64.h i386/netbsd64.h"
+	tmake_file="${tmake_file} i386/t-crtstuff"
+	;;
+i[34567]86-*-openbsd2.*|i[34567]86-*openbsd3.[0123])
+	tm_file="i386/i386.h i386/unix.h i386/bsd.h i386/gas.h i386/gstabs.h openbsd-oldgas.h openbsd.h i386/openbsd.h"
+	# needed to unconfuse gdb
+	tmake_file="${tmake_file} t-libc-ok t-openbsd i386/t-openbsd"
+	# we need collect2 until our bug is fixed...
+	use_collect2=yes
+	;;
+i[34567]86-*-openbsd*)
+	tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h"
+	tm_file="${tm_file} openbsd.h i386/openbsdelf.h"
+	gas=yes
+	gnu_ld=yes
+	;;
+i[34567]86-*-coff*)
+	tm_file="${tm_file} i386/unix.h i386/bsd.h i386/gas.h dbxcoff.h i386/i386-coff.h"
+	;;
+i[34567]86-*-linux* | i[34567]86-*-kfreebsd*-gnu | i[34567]86-*-knetbsd*-gnu | i[34567]86-*-gnu* | i[34567]86-*-kopensolaris*-gnu)
+			# Intel 80386's running GNU/*
+			# with ELF format using glibc 2
+	tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h svr4.h linux.h"
+	case ${target} in
+	i[34567]86-*-linux*)
+		if test x$enable_targets = xall; then
+			tm_file="${tm_file} i386/x86-64.h i386/linux64.h"
+			tm_defines="${tm_defines} TARGET_BI_ARCH=1"
+			tmake_file="${tmake_file} i386/t-linux64"
+			need_64bit_hwint=yes
+			case X"${with_cpu}" in
+			Xgeneric|Xcore2|Xnocona|Xx86-64|Xamdfam10|Xbarcelona|Xk8|Xopteron|Xathlon64|Xathlon-fx)
+				;;
+			X)
+				if test x$with_cpu_64 = x; then
+					with_cpu_64=generic
+				fi
+				;;
+			*)
+				echo "Unsupported CPU used in --with-cpu=$with_cpu, supported values:" 1>&2
+				echo "generic core2 nocona x86-64 amdfam10 barcelona k8 opteron athlon64 athlon-fx" 1>&2
+				exit 1
+				;;
+			esac
+		else
+			tm_file="${tm_file} i386/linux.h"
+		fi
+		;;
+	i[34567]86-*-knetbsd*-gnu) tm_file="${tm_file} i386/linux.h knetbsd-gnu.h i386/knetbsd-gnu.h" ;;
+	i[34567]86-*-kfreebsd*-gnu) tm_file="${tm_file} i386/linux.h kfreebsd-gnu.h i386/kfreebsd-gnu.h" ;;
+	i[34567]86-*-kopensolaris*-gnu) tm_file="${tm_file} i386/linux.h kopensolaris-gnu.h i386/kopensolaris-gnu.h" ;;
+	i[34567]86-*-gnu*) tm_file="$tm_file i386/linux.h gnu.h i386/gnu.h";;
+	esac
+	tmake_file="${tmake_file} i386/t-crtstuff i386/t-crtpc i386/t-crtfm t-dfprules"
+	;;
+x86_64-*-linux* | x86_64-*-kfreebsd*-gnu | x86_64-*-knetbsd*-gnu)
+	tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h svr4.h linux.h \
+		 i386/x86-64.h i386/linux64.h"
+	case ${target} in
+	x86_64-*-kfreebsd*-gnu) tm_file="${tm_file} kfreebsd-gnu.h" ;;
+	x86_64-*-knetbsd*-gnu) tm_file="${tm_file} knetbsd-gnu.h" ;;
+	esac
+	tmake_file="${tmake_file} i386/t-linux64 i386/t-crtstuff i386/t-crtpc i386/t-crtfm t-dfprules"
+	;;
+i[34567]86-pc-msdosdjgpp*)
+	xm_file=i386/xm-djgpp.h
+	tm_file="dbxcoff.h ${tm_file} i386/unix.h i386/bsd.h i386/gas.h i386/djgpp.h"
+	tmake_file="${tmake_file} i386/t-djgpp"
+	extra_options="${extra_options} i386/djgpp.opt"
+	gnu_ld=yes
+	gas=yes
+	;;
+i[34567]86-*-lynxos*)
+	xm_defines=POSIX
+	tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h i386/lynx.h lynx.h"
+	tmake_file="${tmake_file} i386/t-crtstuff t-lynx"
+	extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"
+	extra_options="${extra_options} lynx.opt"
+	thread_file=lynx
+	gnu_ld=yes
+	gas=yes
+	;;
+i[3456x]86-*-netware*)
+	tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h svr4.h tm-dwarf2.h i386/netware.h"
+ 	tmake_file="${tmake_file} i386/t-netware"
+	extra_objs=netware.o
+	case /${with_ld} in
+	*/nwld)
+		extra_objs="$extra_objs nwld.o"
+		tm_file="${tm_file} i386/nwld.h"
+	 	tmake_file="${tmake_file} i386/t-nwld"
+		extra_parts="crt0.o libgcc.def libc.def libcpre.def posixpre.def"
+		;;
+	esac
+	case x${enable_threads} in
+	x | xyes | xposix) thread_file='posix';;
+	xnks) thread_file='nks';;
+	xno) ;;
+	*) echo 'Unknown thread configuration for NetWare' >&2; exit 1;;
+	esac
+	;;
+i[34567]86-*-nto-qnx*)
+	tm_file="${tm_file} i386/att.h dbxelf.h tm-dwarf2.h elfos.h svr4.h i386/unix.h i386/nto.h"
+	tmake_file="${tmake_file} i386/t-nto"
+	gnu_ld=yes
+	gas=yes
+	;;
+i[34567]86-*-rtems*)
+	tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h i386/i386elf.h i386/rtemself.h rtems.h"
+	extra_parts="crtbegin.o crtend.o crti.o crtn.o"
+	tmake_file="${tmake_file} i386/t-rtems-i386 i386/t-crtstuff t-rtems"
+	;;
+i[34567]86-*-solaris2*)
+	tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h svr4.h i386/sysv4.h sol2.h"
+	case ${target} in
+	*-*-solaris2.1[0-9]*)
+		tm_file="${tm_file} sol2-10.h"
+		;;
+	esac
+	tm_file="${tm_file} i386/sol2.h"
+	tmake_file="${tmake_file} t-sol2 t-svr4"
+	c_target_objs="${c_target_objs} sol2-c.o"
+	cxx_target_objs="${cxx_target_objs} sol2-c.o"
+	extra_objs="sol2.o"
+	tm_p_file="${tm_p_file} sol2-protos.h"
+	if test x$gnu_ld = xyes; then
+		tmake_file="$tmake_file t-slibgcc-elf-ver"
+		tm_defines="${tm_defines} TARGET_GNU_LD=1"
+	else
+		tmake_file="$tmake_file t-slibgcc-sld"
+	fi
+	if test x$gas = xyes; then
+		tm_file="usegas.h ${tm_file}"
+	fi
+	tm_file="$tm_file tm-dwarf2.h"
+	case ${target} in
+	*-*-solaris2.1[0-9]*)
+		tm_file="${tm_file} i386/x86-64.h i386/sol2-10.h"
+		tm_defines="${tm_defines} TARGET_BI_ARCH=1"
+		tmake_file="$tmake_file i386/t-sol2-10"
+		# i386/t-crtstuff only affects libgcc.  Its inclusion
+		# depends on a runtime test and is thus performed in
+		# libgcc/configure.ac instead.
+		need_64bit_hwint=yes
+		case X"${with_cpu}" in
+		Xgeneric|Xcore2|Xnocona|Xx86-64|Xamdfam10|Xbarcelona|Xk8|Xopteron|Xathlon64|Xathlon-fx)
+			;;
+		X)
+			if test x$with_cpu_64 = x; then
+				with_cpu_64=generic
+			fi
+			;;
+		*)
+			echo "Unsupported CPU used in --with-cpu=$with_cpu, supported values:" 1>&2
+			echo "generic core2 nocona x86-64 amdfam10 barcelona k8 opteron athlon64 athlon-fx" 1>&2
+			exit 1
+			;;
+		esac
+		;;
+	esac
+	case ${enable_threads}:${have_pthread_h}:${have_thread_h} in
+	  "":yes:* | yes:yes:* )
+		thread_file=posix
+		;;
+	  "":*:yes | yes:*:yes )
+		thread_file=solaris
+		;;
+	esac
+	;;
+i[4567]86-wrs-vxworks|i[4567]86-wrs-vxworksae)
+	tm_file="${tm_file} i386/unix.h i386/att.h elfos.h svr4.h vx-common.h"
+	case ${target} in
+	  *-vxworksae*)
+	    tm_file="${tm_file} vxworksae.h i386/vx-common.h i386/vxworksae.h"
+	    tmake_file="${tmake_file} i386/t-vxworks i386/t-vxworksae"
+	    ;;
+	  *)
+	    tm_file="${tm_file} vxworks.h i386/vx-common.h i386/vxworks.h"
+	    tmake_file="${tmake_file} i386/t-vxworks"
+	    ;;
+	esac
+	;;
+i[34567]86-*-pe | i[34567]86-*-cygwin*)
+	tm_file="${tm_file} i386/unix.h i386/bsd.h i386/gas.h dbxcoff.h i386/cygming.h i386/cygwin.h"
+	xm_file=i386/xm-cygwin.h
+	# This has to match the logic for DWARF2_UNWIND_INFO in gcc/config/i386/cygming.h
+	if test x$sjlj = x0; then
+		tmake_eh_file="i386/t-dw2-eh"
+	else
+		tmake_eh_file="i386/t-sjlj-eh"
+	fi
+	tmake_file="${tmake_file} ${tmake_eh_file} i386/t-cygming i386/t-cygwin"
+	target_gtfiles="\$(srcdir)/config/i386/winnt.c"
+	extra_options="${extra_options} i386/cygming.opt"
+	extra_objs="winnt.o winnt-stubs.o"
+	c_target_objs="${c_target_objs} cygwin2.o msformat-c.o"
+	cxx_target_objs="${cxx_target_objs} cygwin2.o winnt-cxx.o msformat-c.o"
+	extra_gcc_objs=cygwin1.o
+	if test x$enable_threads = xyes; then
+		thread_file='posix'
+	fi
+	;;
+i[34567]86-*-mingw* | x86_64-*-mingw*)
+	tm_file="${tm_file} i386/unix.h i386/bsd.h i386/gas.h dbxcoff.h i386/cygming.h i386/mingw32.h"
+	xm_file=i386/xm-mingw32.h
+	case ${target} in
+		x86_64-*-*)
+			need_64bit_hwint=yes
+			;;
+		*)
+			;;
+	esac
+	# This has to match the logic for DWARF2_UNWIND_INFO in gcc/config/i386/cygming.h
+	if test x$sjlj = x0; then
+		tmake_eh_file="i386/t-dw2-eh"
+	else
+		tmake_eh_file="i386/t-sjlj-eh"
+	fi
+	tmake_file="${tmake_file} ${tmake_eh_file} i386/t-cygming i386/t-mingw32"
+	target_gtfiles="\$(srcdir)/config/i386/winnt.c"
+	extra_options="${extra_options} i386/cygming.opt i386/mingw.opt"
+	extra_objs="winnt.o winnt-stubs.o"
+	c_target_objs="${c_target_objs} msformat-c.o"
+	cxx_target_objs="${cxx_target_objs} winnt-cxx.o msformat-c.o"
+	default_use_cxa_atexit=yes
+	case ${enable_threads} in
+	  "" | yes | win32)
+	  thread_file='win32'
+	  tmake_file="${tmake_file} i386/t-gthr-win32"
+	  ;;
+	esac
+	case ${target} in
+		x86_64-*-mingw*)
+			tmake_file="${tmake_file} i386/t-crtfm"
+			;;
+		*)
+			;;
+	esac
+	case ${target} in
+ 		*mingw32crt*)
+ 			tm_file="${tm_file} i386/crtdll.h"
+ 			;;
+		*mingw32msv* | *mingw*)
+			;;
+	esac
+	;;
+i[34567]86-*-interix3*)
+	tm_file="${tm_file} i386/unix.h i386/bsd.h i386/gas.h i386/i386-interix.h i386/i386-interix3.h interix.h interix3.h"
+	tmake_file="${tmake_file} i386/t-interix"
+	extra_objs=winnt.o
+	target_gtfiles="\$(srcdir)/config/i386/winnt.c"
+	if test x$enable_threads = xyes ; then
+		thread_file='posix'
+	fi
+	if test x$stabs = xyes ; then
+		tm_file="${tm_file} dbxcoff.h"
+	fi
+	;;
+ia64*-*-elf*)
+	tm_file="${tm_file} dbxelf.h elfos.h ia64/sysv4.h ia64/elf.h"
+	tmake_file="ia64/t-ia64"
+	target_cpu_default="0"
+	if test x$gas = xyes
+	then
+		target_cpu_default="${target_cpu_default}|MASK_GNU_AS"
+	fi
+	if test x$gnu_ld = xyes
+	then
+		target_cpu_default="${target_cpu_default}|MASK_GNU_LD"
+	fi
+	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtfastmath.o"
+	;;
+ia64*-*-freebsd*)
+	tm_file="${tm_file} dbxelf.h elfos.h ${fbsd_tm_file} ia64/sysv4.h ia64/freebsd.h"
+	target_cpu_default="MASK_GNU_AS|MASK_GNU_LD"
+	tmake_file="${tmake_file} ia64/t-ia64"
+	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtfastmath.o"
+	;;
+ia64*-*-linux*)
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h linux.h ia64/sysv4.h ia64/linux.h"
+	tmake_file="${tmake_file} ia64/t-ia64 t-libunwind ia64/t-glibc"
+	if test x$with_system_libunwind != xyes ; then
+		tmake_file="${tmake_file} t-libunwind-elf ia64/t-glibc-libunwind"
+	fi
+	target_cpu_default="MASK_GNU_AS|MASK_GNU_LD"
+	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtfastmath.o"
+	;;
+ia64*-*-hpux*)
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h ia64/sysv4.h ia64/hpux.h"
+	tmake_file="ia64/t-ia64 ia64/t-hpux"
+	target_cpu_default="MASK_GNU_AS"
+	case x$enable_threads in
+	x | xyes | xposix )
+		thread_file=posix
+		;;
+	esac
+	use_collect2=no
+	c_target_objs="ia64-c.o"
+	cxx_target_objs="ia64-c.o"
+	extra_options="${extra_options} ia64/ilp32.opt"
+	;;
+iq2000*-*-elf*)
+        tm_file="svr4.h elfos.h iq2000/iq2000.h"
+        tmake_file=iq2000/t-iq2000
+        out_file=iq2000/iq2000.c
+        md_file=iq2000/iq2000.md
+        ;;
+m32r-*-elf*)
+	tm_file="dbxelf.h elfos.h svr4.h ${tm_file}"
+	extra_parts="crtinit.o crtfini.o"
+ 	;;
+m32rle-*-elf*)
+	tm_file="dbxelf.h elfos.h svr4.h m32r/little.h ${tm_file}"
+	extra_parts="crtinit.o crtfini.o m32rx/crtinit.o m32rx/crtfini.o"
+	;;
+m32r-*-rtems*)
+	tm_file="dbxelf.h elfos.h svr4.h ${tm_file} m32r/rtems.h rtems.h"
+	tmake_file="m32r/t-m32r t-rtems"
+	extra_parts="crtinit.o crtfini.o"
+ 	;;
+m32r-*-linux*)
+	tm_file="dbxelf.h elfos.h svr4.h linux.h ${tm_file} m32r/linux.h"
+	# We override the tmake_file for linux -- why?
+	tmake_file="t-slibgcc-elf-ver m32r/t-linux"
+	gnu_ld=yes
+	if test x$enable_threads = xyes; then
+		thread_file='posix'
+	fi
+ 	;;
+m32rle-*-linux*)
+	tm_file="dbxelf.h elfos.h svr4.h linux.h m32r/little.h ${tm_file} m32r/linux.h"
+	# We override the tmake_file for linux -- why?
+	tmake_file="t-slibgcc-elf-ver m32r/t-linux"
+	gnu_ld=yes
+	if test x$enable_threads = xyes; then
+		thread_file='posix'
+	fi
+	;;
+# m68hc11 and m68hc12 share the same machine description.
+m68hc11-*-*|m6811-*-*)
+	tm_file="dbxelf.h elfos.h usegas.h m68hc11/m68hc11.h"
+	tm_p_file="m68hc11/m68hc11-protos.h"
+	md_file="m68hc11/m68hc11.md"
+	out_file="m68hc11/m68hc11.c"
+	tmake_file="m68hc11/t-m68hc11"
+        ;;
+m68hc12-*-*|m6812-*-*)
+	tm_file="m68hc11/m68hc12.h dbxelf.h elfos.h usegas.h m68hc11/m68hc11.h"
+	tm_p_file="m68hc11/m68hc11-protos.h"
+	md_file="m68hc11/m68hc11.md"
+	out_file="m68hc11/m68hc11.c"
+	tmake_file="m68hc11/t-m68hc11"
+	extra_options="${extra_options} m68hc11/m68hc11.opt"
+        ;;
+m68k-*-aout*)
+	default_m68k_cpu=68020
+	default_cf_cpu=5206
+	tmake_file="m68k/t-floatlib m68k/t-m68kbare m68k/t-mlibs"
+	tm_file="${tm_file} m68k/m68k-none.h m68k/m68kemb.h m68k/m68k-aout.h libgloss.h"
+	;;
+m68k-*-coff*)
+	default_m68k_cpu=68020
+	default_cf_cpu=5206
+	tmake_file="m68k/t-floatlib m68k/t-m68kbare m68k/t-mlibs"
+	tm_defines="${tm_defines} MOTOROLA=1"
+	tm_file="${tm_file} m68k/m68k-none.h m68k/m68kemb.h dbxcoff.h m68k/coff.h dbx.h"
+	;;
+m68k-*-elf* | fido-*-elf*)
+	case ${target} in
+	fido-*-elf*)
+		# Check that $with_cpu makes sense.
+		case $with_cpu in
+		"" | "fidoa")
+			;;
+		*)
+			echo "Cannot accept --with-cpu=$with_cpu"
+			exit 1
+			;;
+		esac
+		with_cpu=fidoa
+		;;
+	*)
+		default_m68k_cpu=68020
+		default_cf_cpu=5206
+		;;
+	esac
+	tm_file="${tm_file} m68k/m68k-none.h m68k/m68kelf.h dbxelf.h elfos.h m68k/m68kemb.h m68k/m68020-elf.h"
+	tm_defines="${tm_defines} MOTOROLA=1"
+	tmake_file="m68k/t-floatlib m68k/t-m68kbare m68k/t-m68kelf"
+	# Add multilibs for targets other than fido.
+	case ${target} in
+	fido-*-elf*)
+		;;
+	*)
+		tmake_file="$tmake_file m68k/t-mlibs"
+		;;
+	esac
+	extra_parts="crtbegin.o crtend.o"
+	;;
+m68k*-*-netbsdelf*)
+	default_m68k_cpu=68020
+	default_cf_cpu=5475
+	tm_file="${tm_file} dbxelf.h elfos.h netbsd.h netbsd-elf.h m68k/netbsd-elf.h"
+	tm_defines="${tm_defines} MOTOROLA=1"
+	;;
+m68k*-*-openbsd*)
+	default_m68k_cpu=68020
+	default_cf_cpu=5475
+	# needed to unconfuse gdb
+	tm_defines="${tm_defines} OBSD_OLD_GAS"
+	tm_file="${tm_file} openbsd.h m68k/openbsd.h"
+	tmake_file="t-libc-ok t-openbsd m68k/t-openbsd"
+	# we need collect2 until our bug is fixed...
+	use_collect2=yes
+	;;
+m68k-*-uclinuxoldabi*)		# Motorola m68k/ColdFire running uClinux
+				# with uClibc, using the original
+				# m68k-elf-based ABI
+	default_m68k_cpu=68020
+	default_cf_cpu=5206
+	tm_file="${tm_file} m68k/m68k-none.h m68k/m68kelf.h dbxelf.h elfos.h m68k/uclinux-oldabi.h"
+ 	tm_defines="${tm_defines} MOTOROLA=1"
+	tmake_file="m68k/t-floatlib m68k/t-uclinux"
+	;;
+m68k-*-uclinux*)		# Motorola m68k/ColdFire running uClinux
+				# with uClibc, using the new GNU/Linux-style
+				# ABI.
+	default_m68k_cpu=68020
+	default_cf_cpu=5206
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h linux.h flat.h m68k/linux.h m68k/uclinux.h ./sysroot-suffix.h"
+ 	tm_defines="${tm_defines} MOTOROLA=1 UCLIBC_DEFAULT=1"
+	extra_options="${extra_options} linux.opt"
+	tmake_file="m68k/t-floatlib m68k/t-uclinux m68k/t-mlibs"
+	;;
+m68k-*-linux*)		# Motorola m68k's running GNU/Linux
+				# with ELF format using glibc 2
+				# aka the GNU/Linux C library 6.
+	default_m68k_cpu=68020
+	default_cf_cpu=5475
+	with_arch=${with_arch:-m68k}
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h linux.h m68k/linux.h ./sysroot-suffix.h"
+	extra_options="${extra_options} m68k/ieee.opt"
+	tm_defines="${tm_defines} MOTOROLA=1"
+	tmake_file="${tmake_file} m68k/t-floatlib m68k/t-linux m68k/t-mlibs"
+	# if not configured with --enable-sjlj-exceptions, bump the
+	# libgcc version number
+	if test x$sjlj != x1; then
+	    tmake_file="$tmake_file m68k/t-slibgcc-elf-ver"
+	fi
+	;;
+m68k-*-rtems*)
+	default_m68k_cpu=68020
+	default_cf_cpu=5206
+	tmake_file="m68k/t-floatlib m68k/t-m68kbare m68k/t-crtstuff t-rtems m68k/t-rtems m68k/t-mlibs"
+	tm_file="${tm_file} m68k/m68k-none.h m68k/m68kelf.h dbxelf.h elfos.h m68k/m68kemb.h m68k/m68020-elf.h m68k/rtemself.h rtems.h"
+	tm_defines="${tm_defines} MOTOROLA=1"
+	extra_parts="crtbegin.o crtend.o"
+	;;
+mcore-*-elf)
+	tm_file="dbxelf.h elfos.h svr4.h ${tm_file} mcore/mcore-elf.h"
+	tmake_file=mcore/t-mcore
+	inhibit_libc=true
+	;;
+mcore-*-pe*)
+	tm_file="svr3.h dbxcoff.h ${tm_file} mcore/mcore-pe.h"
+	tmake_file=mcore/t-mcore-pe
+	inhibit_libc=true
+	;;
+mips-sgi-irix[56]*)
+	tm_file="elfos.h ${tm_file} mips/iris.h"
+	tmake_file="mips/t-iris mips/t-slibgcc-irix"
+	target_cpu_default="MASK_ABICALLS"
+	case ${target} in
+	*-*-irix5*)
+		tm_file="${tm_file} mips/iris5.h"
+		;;
+
+	*-*-irix6*)
+		tm_file="${tm_file} mips/iris6.h"
+		tmake_file="${tmake_file} mips/t-iris6"
+		tm_defines="${tm_defines} MIPS_ISA_DEFAULT=3 MIPS_ABI_DEFAULT=ABI_N32"
+		;;
+	esac
+	if test "x$stabs" = xyes
+	then
+		tm_file="${tm_file} dbx.h mips/dbxmdebug.h"
+	fi
+	if test "x$gnu_ld" = xyes
+	then
+		tm_defines="${tm_defines} IRIX_USING_GNU_LD"
+	fi
+	case ${enable_threads}:${have_pthread_h} in
+	  "":yes | yes:yes ) thread_file=posix ;;
+	esac
+	;;
+mips*-*-netbsd*)			# NetBSD/mips, either endian.
+	target_cpu_default="MASK_ABICALLS"
+	tm_file="elfos.h ${tm_file} mips/elf.h netbsd.h netbsd-elf.h mips/netbsd.h"
+	;;
+mips64*-*-linux* | mipsisa64*-*-linux*)
+	tm_file="dbxelf.h elfos.h svr4.h linux.h ${tm_file} mips/linux.h mips/linux64.h"
+	tmake_file="${tmake_file} mips/t-linux64 mips/t-libgcc-mips16"
+	tm_defines="${tm_defines} MIPS_ABI_DEFAULT=ABI_N32"
+	case ${target} in
+		mips64el-st-linux-gnu)
+			tm_file="${tm_file} mips/st.h"
+			tmake_file="${tmake_file} mips/t-st"
+			;;
+		mips64octeon*-*-linux*)
+			tm_defines="${tm_defines} MIPS_CPU_STRING_DEFAULT=\\\"octeon\\\""
+			target_cpu_default=MASK_SOFT_FLOAT_ABI
+			;;
+		mipsisa64r2*-*-linux*)
+			tm_defines="${tm_defines} MIPS_ISA_DEFAULT=65"
+			;;
+	esac
+	gnu_ld=yes
+	gas=yes
+	test x$with_llsc != x || with_llsc=yes
+	;;
+mips*-*-linux*)				# Linux MIPS, either endian.
+        tm_file="dbxelf.h elfos.h svr4.h linux.h ${tm_file} mips/linux.h"
+	tmake_file="${tmake_file} mips/t-libgcc-mips16"
+	case ${target} in
+        mipsisa32r2*)
+		tm_defines="${tm_defines} MIPS_ISA_DEFAULT=33"
+                ;;
+        mipsisa32*)
+		tm_defines="${tm_defines} MIPS_ISA_DEFAULT=32"
+        esac
+	test x$with_llsc != x || with_llsc=yes
+	;;
+mips*-*-openbsd*)
+	tm_defines="${tm_defines} OBSD_HAS_DECLARE_FUNCTION_NAME OBSD_HAS_DECLARE_OBJECT OBSD_HAS_CORRECT_SPECS"
+	target_cpu_default="MASK_ABICALLS"
+	tm_file="mips/mips.h openbsd.h mips/openbsd.h mips/sdb.h"
+	case ${target} in
+	mips*el-*-openbsd*)
+	    tm_defines="${tm_defines} TARGET_ENDIAN_DEFAULT=0";;
+	*)  tm_defines="${tm_defines} TARGET_ENDIAN_DEFAULT=MASK_BIG_ENDIAN";;
+        esac
+	;;
+mips*-sde-elf*)
+	tm_file="elfos.h ${tm_file} mips/elf.h mips/sde.h"
+	tmake_file="mips/t-sde mips/t-libgcc-mips16"
+	case "${with_newlib}" in
+	  yes)
+	    # newlib / libgloss.
+	    ;;
+	  *)
+	    # MIPS toolkit libraries.
+	    tm_file="$tm_file mips/sdemtk.h"
+	    tmake_file="$tmake_file mips/t-sdemtk"
+	    extra_options="$extra_options mips/sdemtk.opt"
+	    case ${enable_threads} in
+	      "" | yes | mipssde)
+		thread_file='mipssde'
+		;;
+	    esac
+	    ;;
+	esac
+	case ${target} in
+	  mipsisa32r2*)
+	    tm_defines="MIPS_ISA_DEFAULT=33 MIPS_ABI_DEFAULT=ABI_32"
+	    ;;
+	  mipsisa32*)
+	    tm_defines="MIPS_ISA_DEFAULT=32 MIPS_ABI_DEFAULT=ABI_32"
+	    ;;
+	  mipsisa64r2*)
+	    tm_defines="MIPS_ISA_DEFAULT=65 MIPS_ABI_DEFAULT=ABI_N32"
+	    ;;
+	  mipsisa64*)
+	    tm_defines="MIPS_ISA_DEFAULT=64 MIPS_ABI_DEFAULT=ABI_N32"
+	    ;;
+	esac
+	;;
+mipsisa32-*-elf* | mipsisa32el-*-elf* | \
+mipsisa32r2-*-elf* | mipsisa32r2el-*-elf* | \
+mipsisa64-*-elf* | mipsisa64el-*-elf* | \
+mipsisa64r2-*-elf* | mipsisa64r2el-*-elf*)
+	tm_file="elfos.h ${tm_file} mips/elf.h"
+	tmake_file="mips/t-isa3264 mips/t-libgcc-mips16"
+	case ${target} in
+	  mipsisa32r2*)
+	    tm_defines="${tm_defines} MIPS_ISA_DEFAULT=33"
+	    ;;
+	  mipsisa32*)
+	    tm_defines="${tm_defines} MIPS_ISA_DEFAULT=32"
+	    ;;
+	  mipsisa64r2*)
+	    tm_defines="${tm_defines} MIPS_ISA_DEFAULT=65"
+	    ;;
+	  mipsisa64*)
+	    tm_defines="${tm_defines} MIPS_ISA_DEFAULT=64"
+	    ;;
+	esac
+	case ${target} in
+	  mipsisa32*-*-elfoabi*)
+	    tm_defines="${tm_defines} MIPS_ABI_DEFAULT=ABI_32"
+	    tm_file="${tm_file} mips/elfoabi.h"
+	    ;;
+	  mipsisa64*-*-elfoabi*)
+	    tm_defines="${tm_defines} MIPS_ABI_DEFAULT=ABI_O64"
+	    tm_file="${tm_file} mips/elfoabi.h"
+	    ;;
+	  *-*-elf*)
+	    tm_defines="${tm_defines} MIPS_ABI_DEFAULT=ABI_EABI"
+	    ;;
+	esac
+	;;
+mipsisa64sr71k-*-elf*)
+        tm_file="elfos.h ${tm_file} mips/elf.h"
+        tmake_file=mips/t-sr71k
+	target_cpu_default="MASK_64BIT|MASK_FLOAT64"
+	tm_defines="${tm_defines} MIPS_ISA_DEFAULT=64 MIPS_CPU_STRING_DEFAULT=\\\"sr71000\\\" MIPS_ABI_DEFAULT=ABI_EABI"
+        ;;
+mipsisa64sb1-*-elf* | mipsisa64sb1el-*-elf*)
+	tm_file="elfos.h ${tm_file} mips/elf.h"
+	tmake_file="mips/t-elf mips/t-libgcc-mips16 mips/t-sb1"
+	target_cpu_default="MASK_64BIT|MASK_FLOAT64"
+	tm_defines="${tm_defines} MIPS_ISA_DEFAULT=64 MIPS_CPU_STRING_DEFAULT=\\\"sb1\\\" MIPS_ABI_DEFAULT=ABI_O64"
+	;;
+mips-*-elf* | mipsel-*-elf*)
+	tm_file="elfos.h ${tm_file} mips/elf.h"
+	tmake_file="mips/t-elf mips/t-libgcc-mips16"
+	;;
+mips64-*-elf* | mips64el-*-elf*)
+	tm_file="elfos.h ${tm_file} mips/elf.h"
+	tmake_file="mips/t-elf mips/t-libgcc-mips16"
+	target_cpu_default="MASK_64BIT|MASK_FLOAT64"
+	tm_defines="${tm_defines} MIPS_ISA_DEFAULT=3 MIPS_ABI_DEFAULT=ABI_O64"
+	;;
+mips64vr-*-elf* | mips64vrel-*-elf*)
+        tm_file="elfos.h ${tm_file} mips/vr.h mips/elf.h"
+        tmake_file=mips/t-vr
+        ;;
+mips64orion-*-elf* | mips64orionel-*-elf*)
+	tm_file="elfos.h ${tm_file} mips/elforion.h mips/elf.h"
+	tmake_file="mips/t-elf mips/t-libgcc-mips16"
+	target_cpu_default="MASK_64BIT|MASK_FLOAT64"
+	tm_defines="${tm_defines} MIPS_ISA_DEFAULT=3 MIPS_ABI_DEFAULT=ABI_O64"
+	;;
+mips*-*-rtems*)
+	tm_file="elfos.h ${tm_file} mips/elf.h mips/rtems.h rtems.h"
+	tmake_file="mips/t-elf mips/t-libgcc-mips16 t-rtems mips/t-rtems"
+	;;
+mips-wrs-vxworks)
+	tm_file="elfos.h ${tm_file} svr4.h mips/elf.h vx-common.h vxworks.h mips/vxworks.h"
+	tmake_file="${tmake_file} mips/t-vxworks"
+	;;
+mipstx39-*-elf* | mipstx39el-*-elf*)
+	tm_file="elfos.h ${tm_file} mips/r3900.h mips/elf.h"
+	tmake_file="mips/t-r3900 mips/t-libgcc-mips16"
+	;;
+mmix-knuth-mmixware)
+	need_64bit_hwint=yes
+	;;
+mn10300-*-*)
+	tm_file="dbxelf.h elfos.h svr4.h ${tm_file}"
+	if test x$stabs = xyes
+	then
+		tm_file="${tm_file} dbx.h"
+	fi
+	use_collect2=no
+	;;
+pdp11-*-bsd)
+	tm_file="${tm_file} pdp11/2bsd.h"
+	use_fixproto=yes
+        ;;
+pdp11-*-*)
+	;;
+picochip-*)
+        # Nothing special
+        ;;
+# port not yet contributed
+#powerpc-*-openbsd*)
+#	tmake_file="${tmake_file} rs6000/t-fprules rs6000/t-fprules-fpbit "
+#	extra_headers=
+#	;;
+powerpc64-*-linux*)
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h freebsd-spec.h rs6000/sysv4.h"
+	test x$with_cpu != x || cpu_is_64bit=yes
+	test x$cpu_is_64bit != xyes || tm_file="${tm_file} rs6000/default64.h"
+	tm_file="rs6000/biarch64.h ${tm_file} rs6000/linux64.h"
+	if test x${enable_secureplt} = xyes; then
+		tm_file="rs6000/secureplt.h ${tm_file}"
+	fi
+	extra_options="${extra_options} rs6000/sysv4.opt rs6000/linux64.opt"
+	tmake_file="t-dfprules rs6000/t-fprules ${tmake_file} rs6000/t-ppccomm rs6000/t-linux64 rs6000/t-fprules-softfp soft-fp/t-softfp"
+	;;
+powerpc64-*-gnu*)
+	tm_file="${cpu_type}/${cpu_type}.h elfos.h svr4.h freebsd-spec.h gnu.h rs6000/sysv4.h rs6000/linux64.h rs6000/gnu.h"
+	extra_options="${extra_options} rs6000/sysv4.opt rs6000/linux64.opt"
+	tmake_file="rs6000/t-fprules t-slibgcc-elf-ver t-gnu rs6000/t-linux64 rs6000/t-fprules-softfp soft-fp/t-softfp"
+	;;
+powerpc-*-darwin*)
+	extra_options="${extra_options} rs6000/darwin.opt"
+	extra_parts="crt2.o"
+	case ${target} in
+	  *-darwin1[0-9]* | *-darwin[8-9]*)
+	    tmake_file="${tmake_file} rs6000/t-darwin8"
+	    tm_file="${tm_file} rs6000/darwin8.h"
+	    ;;
+	  *-darwin7*)
+	    tm_file="${tm_file} rs6000/darwin7.h"
+	    ;;
+	  *-darwin[0-6]*)
+	    ;;
+	esac
+	extra_headers=altivec.h
+	;;
+powerpc64-*-darwin*)
+	tm_file="${tm_file} ${cpu_type}/darwin8.h ${cpu_type}/darwin64.h"
+	extra_options="${extra_options} ${cpu_type}/darwin.opt"
+	# We're omitting t-darwin8 to avoid building any multilibs
+	extra_headers=altivec.h
+	;;
+powerpc*-*-freebsd*)
+	tm_file="${tm_file} dbxelf.h elfos.h ${fbsd_tm_file} rs6000/sysv4.h rs6000/freebsd.h"
+	tmake_file="rs6000/t-fprules rs6000/t-fprules-fpbit rs6000/t-ppcos ${tmake_file} rs6000/t-ppccomm"
+	extra_options="${extra_options} rs6000/sysv4.opt"
+	;;
+powerpc-*-netbsd*)
+	tm_file="${tm_file} dbxelf.h elfos.h netbsd.h netbsd-elf.h freebsd-spec.h rs6000/sysv4.h rs6000/netbsd.h"
+	tmake_file="${tmake_file} rs6000/t-netbsd"
+	extra_options="${extra_options} rs6000/sysv4.opt"
+	;;
+powerpc-*-eabispe*)
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h freebsd-spec.h rs6000/sysv4.h rs6000/eabi.h rs6000/e500.h rs6000/eabispe.h"
+	extra_options="${extra_options} rs6000/sysv4.opt"
+	tmake_file="rs6000/t-spe rs6000/t-ppccomm"
+	;;
+powerpc-*-eabisimaltivec*)
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h freebsd-spec.h rs6000/sysv4.h rs6000/eabi.h rs6000/e500.h rs6000/eabisim.h rs6000/eabialtivec.h"
+	extra_options="${extra_options} rs6000/sysv4.opt"
+	tmake_file="rs6000/t-fprules rs6000/t-fprules-fpbit rs6000/t-ppcendian rs6000/t-ppccomm"
+	;;
+powerpc-*-eabisim*)
+	tm_file="${tm_file} dbxelf.h elfos.h usegas.h svr4.h freebsd-spec.h rs6000/sysv4.h rs6000/eabi.h rs6000/e500.h rs6000/eabisim.h"
+	extra_options="${extra_options} rs6000/sysv4.opt"
+	tmake_file="rs6000/t-fprules rs6000/t-fprules-fpbit rs6000/t-ppcgas rs6000/t-ppccomm"
+	;;
+powerpc-*-elf*)
+	tm_file="${tm_file} dbxelf.h elfos.h usegas.h svr4.h freebsd-spec.h rs6000/sysv4.h"
+	extra_options="${extra_options} rs6000/sysv4.opt"
+	tmake_file="rs6000/t-fprules rs6000/t-fprules-fpbit rs6000/t-ppcgas rs6000/t-ppccomm"
+	;;
+powerpc-*-eabialtivec*)
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h freebsd-spec.h rs6000/sysv4.h rs6000/eabi.h rs6000/e500.h rs6000/eabialtivec.h"
+	extra_options="${extra_options} rs6000/sysv4.opt"
+	tmake_file="rs6000/t-fprules rs6000/t-fprules-fpbit rs6000/t-ppcendian rs6000/t-ppccomm"
+	;;
+powerpc-xilinx-eabi*)
+	tm_file="${tm_file} dbxelf.h elfos.h usegas.h svr4.h freebsd-spec.h rs6000/sysv4.h rs6000/eabi.h rs6000/singlefp.h"
+	extra_options="${extra_options} rs6000/sysv4.opt"
+	tmake_file="rs6000/t-fprules rs6000/t-fprules-fpbit rs6000/t-ppcgas rs6000/t-ppccomm"
+	;;
+powerpc-*-eabi*)
+	tm_file="${tm_file} dbxelf.h elfos.h usegas.h svr4.h freebsd-spec.h rs6000/sysv4.h rs6000/eabi.h rs6000/e500.h"
+	extra_options="${extra_options} rs6000/sysv4.opt"
+	tmake_file="rs6000/t-fprules rs6000/t-fprules-fpbit rs6000/t-ppcgas rs6000/t-ppccomm"
+	;;
+powerpc-*-rtems*)
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h freebsd-spec.h rs6000/sysv4.h rs6000/eabi.h rs6000/e500.h rs6000/rtems.h rtems.h"
+	extra_options="${extra_options} rs6000/sysv4.opt"
+	tmake_file="rs6000/t-fprules rs6000/t-fprules-fpbit rs6000/t-rtems t-rtems rs6000/t-ppccomm"
+	;;
+powerpc-*-linux*altivec*)
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h freebsd-spec.h rs6000/sysv4.h rs6000/linux.h rs6000/linuxaltivec.h"
+	extra_options="${extra_options} rs6000/sysv4.opt"
+	tmake_file="rs6000/t-fprules rs6000/t-fprules-softfp soft-fp/t-softfp rs6000/t-ppcos ${tmake_file} rs6000/t-ppccomm"
+	;;
+powerpc-*-linux*spe*)
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h freebsd-spec.h rs6000/sysv4.h rs6000/linux.h rs6000/linuxspe.h rs6000/e500.h"
+	extra_options="${extra_options} rs6000/sysv4.opt"
+	tmake_file="t-dfprules rs6000/t-fprules rs6000/t-fprules-softfp soft-fp/t-softfp rs6000/t-ppcos ${tmake_file} rs6000/t-ppccomm"
+	;;
+powerpc-*-linux*paired*)
+        tm_file="${tm_file} dbxelf.h elfos.h svr4.h freebsd-spec.h rs6000/sysv4.h rs6000/linux.h rs6000/750cl.h"
+        extra_options="${extra_options} rs6000/sysv4.opt"
+        tmake_file="rs6000/t-fprules rs6000/t-fprules-softfp soft-fp/t-softfp rs6000/t-ppcos ${tmake_file} rs6000/t-ppccomm"
+        ;;
+powerpc-*-linux*)
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h freebsd-spec.h rs6000/sysv4.h"
+	extra_options="${extra_options} rs6000/sysv4.opt"
+	tmake_file="t-dfprules rs6000/t-fprules rs6000/t-ppcos ${tmake_file} rs6000/t-ppccomm"
+	case ${enable_targets}:${cpu_is_64bit} in
+	    *powerpc64* | all:* | *:yes)
+		if test x$cpu_is_64bit = xyes; then
+		    tm_file="${tm_file} rs6000/default64.h"
+		fi
+		tm_file="rs6000/biarch64.h ${tm_file} rs6000/linux64.h"
+		tmake_file="$tmake_file rs6000/t-linux64"
+		extra_options="${extra_options} rs6000/linux64.opt"
+		;;
+	    *)
+		tm_file="${tm_file} rs6000/linux.h"
+		;;
+	esac
+	tmake_file="${tmake_file} rs6000/t-fprules-softfp soft-fp/t-softfp"
+	if test x${enable_secureplt} = xyes; then
+		tm_file="rs6000/secureplt.h ${tm_file}"
+	fi
+	;;
+powerpc-*-gnu-gnualtivec*)
+	tm_file="${cpu_type}/${cpu_type}.h elfos.h svr4.h freebsd-spec.h gnu.h rs6000/sysv4.h rs6000/linux.h rs6000/linuxaltivec.h rs6000/gnu.h"
+	extra_options="${extra_options} rs6000/sysv4.opt"
+	tmake_file="rs6000/t-fprules rs6000/t-fprules-fpbit rs6000/t-ppcos t-slibgcc-elf-ver t-gnu rs6000/t-ppccomm"
+	if test x$enable_threads = xyes; then
+		thread_file='posix'
+	fi
+	;;
+powerpc-*-gnu*)
+	tm_file="${cpu_type}/${cpu_type}.h elfos.h svr4.h freebsd-spec.h gnu.h rs6000/sysv4.h rs6000/linux.h rs6000/gnu.h"
+	tmake_file="rs6000/t-fprules rs6000/t-fprules-fpbit rs6000/t-ppcos t-slibgcc-elf-ver t-gnu rs6000/t-ppccomm"
+	extra_options="${extra_options} rs6000/sysv4.opt"
+	if test x$enable_threads = xyes; then
+		thread_file='posix'
+	fi
+	;;
+powerpc-wrs-vxworks|powerpc-wrs-vxworksae)
+	tm_file="${tm_file} elfos.h svr4.h freebsd-spec.h rs6000/sysv4.h"
+	tmake_file="${tmake_file} rs6000/t-fprules rs6000/t-fprules-fpbit rs6000/t-ppccomm rs6000/t-vxworks"
+	extra_options="${extra_options} rs6000/sysv4.opt"
+	extra_headers=ppc-asm.h
+	case ${target} in
+	  *-vxworksae*)
+	    tm_file="${tm_file} vx-common.h vxworksae.h rs6000/vxworks.h rs6000/e500.h rs6000/vxworksae.h"
+	    tmake_file="${tmake_file} rs6000/t-vxworksae"
+	    ;;
+	  *-vxworks*)
+	    tm_file="${tm_file} vx-common.h vxworks.h rs6000/vxworks.h rs6000/e500.h"
+	    ;;
+	esac
+	;;
+powerpc-*-lynxos*)
+	xm_defines=POSIX
+	tm_file="${tm_file} dbxelf.h elfos.h rs6000/sysv4.h rs6000/lynx.h lynx.h"
+	tmake_file="t-lynx rs6000/t-lynx"
+	extra_options="${extra_options} rs6000/sysv4.opt lynx.opt"
+	extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"
+	extra_options="${extra_options} lynx.opt"
+	thread_file=lynx
+	gnu_ld=yes
+	gas=yes
+	;;
+powerpcle-*-elf*)
+	tm_file="${tm_file} dbxelf.h elfos.h usegas.h svr4.h freebsd-spec.h rs6000/sysv4.h rs6000/sysv4le.h"
+	tmake_file="rs6000/t-fprules rs6000/t-fprules-fpbit rs6000/t-ppcgas rs6000/t-ppccomm"
+	extra_options="${extra_options} rs6000/sysv4.opt"
+	;;
+powerpcle-*-eabisim*)
+	tm_file="${tm_file} dbxelf.h elfos.h usegas.h svr4.h freebsd-spec.h rs6000/sysv4.h rs6000/sysv4le.h rs6000/eabi.h rs6000/e500.h rs6000/eabisim.h"
+	tmake_file="rs6000/t-fprules rs6000/t-fprules-fpbit rs6000/t-ppcgas rs6000/t-ppccomm"
+	extra_options="${extra_options} rs6000/sysv4.opt"
+	;;
+powerpcle-*-eabi*)
+	tm_file="${tm_file} dbxelf.h elfos.h usegas.h svr4.h freebsd-spec.h rs6000/sysv4.h rs6000/sysv4le.h rs6000/eabi.h rs6000/e500.h"
+	tmake_file="rs6000/t-fprules rs6000/t-fprules-fpbit rs6000/t-ppcgas rs6000/t-ppccomm"
+	extra_options="${extra_options} rs6000/sysv4.opt"
+	;;
+powerpc-xilinx-eabi*)
+ 	tm_file="${tm_file} dbxelf.h elfos.h usegas.h svr4.h freebsd-spec.h rs6000/sysv4.h rs6000/eabi.h rs6000/singlefp.h rs6000/xfpu.h"
+  	extra_options="${extra_options} rs6000/sysv4.opt"
+  	tmake_file="rs6000/t-fprules rs6000/t-fprules-fpbit rs6000/t-ppcgas rs6000/t-ppccomm"
+  	;;
+rs6000-ibm-aix4.[12]* | powerpc-ibm-aix4.[12]*)
+	tm_file="${tm_file} rs6000/aix.h rs6000/aix41.h rs6000/xcoff.h"
+	tmake_file="rs6000/t-fprules rs6000/t-fprules-fpbit rs6000/t-newas"
+	extra_options="${extra_options} rs6000/aix41.opt"
+	use_collect2=yes
+	extra_headers=
+	use_fixproto=yes
+	;;
+rs6000-ibm-aix4.[3456789]* | powerpc-ibm-aix4.[3456789]*)
+	tm_file="rs6000/biarch64.h ${tm_file} rs6000/aix.h rs6000/aix43.h rs6000/xcoff.h"
+	tmake_file=rs6000/t-aix43
+	extra_options="${extra_options} rs6000/aix64.opt"
+	use_collect2=yes
+	thread_file='aix'
+	extra_headers=
+	;;
+rs6000-ibm-aix5.1.* | powerpc-ibm-aix5.1.*)
+	tm_file="rs6000/biarch64.h ${tm_file} rs6000/aix.h rs6000/aix51.h rs6000/xcoff.h"
+	extra_options="${extra_options} rs6000/aix64.opt"
+	tmake_file=rs6000/t-aix43
+	use_collect2=yes
+	thread_file='aix'
+	extra_headers=
+	;;
+rs6000-ibm-aix5.2.* | powerpc-ibm-aix5.2.*)
+	tm_file="${tm_file} rs6000/aix.h rs6000/aix52.h rs6000/xcoff.h"
+	tmake_file=rs6000/t-aix52
+	extra_options="${extra_options} rs6000/aix64.opt"
+	use_collect2=yes
+	thread_file='aix'
+	extra_headers=
+	;;
+rs6000-ibm-aix5.3.* | powerpc-ibm-aix5.3.*)
+	tm_file="${tm_file} rs6000/aix.h rs6000/aix53.h rs6000/xcoff.h"
+	tmake_file=rs6000/t-aix52
+	extra_options="${extra_options} rs6000/aix64.opt"
+	use_collect2=yes
+	thread_file='aix'
+	extra_headers=altivec.h
+	;;
+rs6000-ibm-aix[6789].* | powerpc-ibm-aix[6789].*)
+	tm_file="${tm_file} rs6000/aix.h rs6000/aix61.h rs6000/xcoff.h"
+	tmake_file=rs6000/t-aix52
+	extra_options="${extra_options} rs6000/aix64.opt"
+	use_collect2=yes
+	thread_file='aix'
+	extra_headers=altivec.h
+	;;
+s390-*-linux*)
+	tm_file="s390/s390.h dbxelf.h elfos.h svr4.h linux.h s390/linux.h"
+	tmake_file="${tmake_file} t-dfprules s390/t-crtstuff s390/t-linux"
+	;;
+s390x-*-linux*)
+	tm_file="s390/s390x.h s390/s390.h dbxelf.h elfos.h svr4.h linux.h s390/linux.h"
+	tm_p_file=s390/s390-protos.h
+	md_file=s390/s390.md
+	extra_modes=s390/s390-modes.def
+	out_file=s390/s390.c
+	tmake_file="${tmake_file} t-dfprules s390/t-crtstuff s390/t-linux s390/t-linux64"
+	;;
+s390x-ibm-tpf*)
+        tm_file="s390/s390x.h s390/s390.h dbxelf.h elfos.h svr4.h s390/tpf.h"
+        tm_p_file=s390/s390-protos.h
+        md_file=s390/s390.md
+        extra_modes=s390/s390-modes.def
+        out_file=s390/s390.c
+        extra_parts="crtbeginS.o crtendS.o"
+        tmake_file="s390/t-crtstuff s390/t-tpf"
+        thread_file='tpf'
+	extra_options="${extra_options} s390/tpf.opt"
+	;;
+score-*-elf)
+        tm_file="dbxelf.h elfos.h score/elf.h score/score.h"
+        tmake_file=score/t-score-elf
+        extra_objs="score7.o score3.o"
+        ;;
+sh-*-elf* | sh[12346l]*-*-elf* | \
+sh-*-symbianelf* | sh[12346l]*-*-symbianelf* | \
+  sh-*-linux* | sh[2346lbe]*-*-linux* | \
+  sh-*-netbsdelf* | shl*-*-netbsdelf* | sh5-*-netbsd* | sh5l*-*-netbsd* | \
+   sh64-*-netbsd* | sh64l*-*-netbsd*)
+	tmake_file="${tmake_file} sh/t-sh sh/t-elf"
+	if test x${with_endian} = x; then
+		case ${target} in
+		sh[1234]*be-*-* | sh[1234]*eb-*-*) with_endian=big ;;
+		shbe-*-* | sheb-*-*)		   with_endian=big,little ;;
+		sh[1234]l* | sh[34]*-*-linux*)	   with_endian=little ;;
+		shl* | sh64l* | sh*-*-linux* | \
+		  sh5l* | sh-superh-elf)	   with_endian=little,big ;;
+		sh[1234]*-*-*)			   with_endian=big ;;
+		*)				   with_endian=big,little ;;
+		esac
+	fi
+	case ${with_endian} in
+	big|little)	tmake_file="${tmake_file} sh/t-1e" ;;
+	big,little|little,big) ;;
+	*)	echo "with_endian=${with_endian} not supported."; exit 1 ;;
+	esac
+	case ${with_endian} in
+	little*)	tm_file="sh/little.h ${tm_file}" ;;
+	esac
+	tm_file="${tm_file} dbxelf.h elfos.h"
+	case ${target} in
+	sh*-*-netbsd*)	;;
+	*)		tm_file="${tm_file} svr4.h" ;;
+	esac
+	tm_file="${tm_file} sh/elf.h"
+	case ${target} in
+	sh*-*-linux*)	tmake_file="${tmake_file} sh/t-linux"
+			tm_file="${tm_file} linux.h sh/linux.h" ;;
+	sh*-*-netbsd*)	tm_file="${tm_file} netbsd.h netbsd-elf.h sh/netbsd-elf.h" ;;
+	sh*-superh-elf)	if test x$with_libgloss != xno; then
+				with_libgloss=yes
+				tm_file="${tm_file} sh/newlib.h"
+			fi
+			tm_file="${tm_file} sh/embed-elf.h sh/superh.h"
+			tmake_file="${tmake_file} sh/t-superh"
+			extra_options="${extra_options} sh/superh.opt" ;;
+	*)		if test x$with_newlib = xyes \
+			   && test x$with_libgloss = xyes; then
+				tm_file="${tm_file} sh/newlib.h"
+			fi
+			tm_file="${tm_file} sh/embed-elf.h" ;;
+	esac
+	case ${target} in
+	sh5*-*-netbsd*)
+		# SHmedia, 32-bit ABI
+		tmake_file="${tmake_file} sh/t-sh64 sh/t-netbsd"
+		;;
+	sh64*-netbsd*)
+		# SHmedia, 64-bit ABI
+		tmake_file="${tmake_file} sh/t-sh64 sh/t-netbsd sh/t-netbsd-sh5-64"
+		;;
+	*-*-netbsd)
+                tmake_file="${tmake_file} sh/t-netbsd"
+		;;
+	sh64*-*-linux*)
+		tmake_file="${tmake_file} sh/t-sh64 sh/t-linux64"
+		tm_file="${tm_file} sh/sh64.h"
+		extra_headers="shmedia.h ushmedia.h sshmedia.h"
+		;;
+	sh64*)
+		tmake_file="${tmake_file} sh/t-sh64"
+		tm_file="${tm_file} sh/sh64.h"
+		extra_headers="shmedia.h ushmedia.h sshmedia.h"
+		;;
+	*-*-symbianelf*)
+		tmake_file="sh/t-symbian"
+		tm_file="sh/symbian-pre.h sh/little.h ${tm_file} sh/symbian-post.h"
+		extra_objs="symbian.o"
+		extra_parts="crt1.o crti.o crtn.o crtbegin.o crtend.o crtbeginS.o crtendS.o"
+		;;
+	esac
+	# sed el/eb endian suffixes away to avoid confusion with sh[23]e
+	case `echo ${target} | sed 's/e[lb]-/-/'` in
+	sh64*-*-netbsd*)	sh_cpu_target=sh5-64media ;;
+	sh64* | sh5*-*-netbsd*)	sh_cpu_target=sh5-32media ;;
+	sh4a_single_only*)	sh_cpu_target=sh4a-single-only ;;
+	sh4a_single*)		sh_cpu_target=sh4a-single ;;
+	sh4a_nofpu*)		sh_cpu_target=sh4a-nofpu ;;
+	sh4al)			sh_cpu_target=sh4al ;;
+	sh4a*)			sh_cpu_target=sh4a ;;
+	sh4_single_only*)	sh_cpu_target=sh4-single-only ;;
+	sh4_single*)		sh_cpu_target=sh4-single ;;
+	sh4_nofpu*)		sh_cpu_target=sh4-nofpu ;;
+	sh4* | sh-superh-*)	sh_cpu_target=sh4 ;;
+	sh3e*)			sh_cpu_target=sh3e ;;
+	sh*-*-netbsd* | sh3*)	sh_cpu_target=sh3 ;;
+	sh2a_single_only*)	sh_cpu_target=sh2a-single-only ;;
+	sh2a_single*)		sh_cpu_target=sh2a-single ;;
+	sh2a_nofpu*)		sh_cpu_target=sh2a-nofpu ;;
+	sh2a*)			sh_cpu_target=sh2a ;;
+	sh2e*)			sh_cpu_target=sh2e ;;
+	sh2*)			sh_cpu_target=sh2 ;;
+	*)			sh_cpu_target=sh1 ;;
+	esac
+	# did the user say --without-fp ?
+	if test x$with_fp = xno; then
+		case ${sh_cpu_target} in
+		sh5-*media)	sh_cpu_target=${sh_cpu_target}-nofpu ;;
+		sh4al | sh1)	;;
+		sh4a* )		sh_cpu_target=sh4a-nofpu ;;
+		sh4*)		sh_cpu_target=sh4-nofpu ;;
+		sh3*)		sh_cpu_target=sh3 ;;
+		sh2a*)		sh_cpu_target=sh2a-nofpu ;;
+		sh2*)		sh_cpu_target=sh2 ;;
+		*)	echo --without-fp not available for $target: ignored
+		esac
+		tm_defines="$tm_defines STRICT_NOFPU=1"
+	fi
+	sh_cpu_default="`echo $with_cpu|sed s/^m/sh/|tr A-Z_ a-z-`"
+	case $sh_cpu_default in
+	sh5-64media-nofpu | sh5-64media | \
+	  sh5-32media-nofpu | sh5-32media | sh5-compact-nofpu | sh5-compact | \
+	  sh2a-single-only | sh2a-single | sh2a-nofpu | sh2a | \
+	  sh4a-single-only | sh4a-single | sh4a-nofpu | sh4a | sh4al | \
+	  sh4-single-only | sh4-single | sh4-nofpu | sh4 | sh4-300 | \
+	  sh3e | sh3 | sh2e | sh2 | sh1) ;;
+	"")	sh_cpu_default=${sh_cpu_target} ;;
+	*)	echo "with_cpu=$with_cpu not supported"; exit 1 ;;
+	esac
+	sh_multilibs=${with_multilib_list}
+	if test x${sh_multilibs} = x ; then
+		case ${target} in
+		sh64-superh-linux* | \
+		sh[1234]*)	sh_multilibs=${sh_cpu_target} ;;
+		sh64* | sh5*)	sh_multilibs=m5-32media,m5-32media-nofpu,m5-compact,m5-compact-nofpu,m5-64media,m5-64media-nofpu ;;
+		sh-superh-*)	sh_multilibs=m4,m4-single,m4-single-only,m4-nofpu ;;
+		sh*-*-linux*)	sh_multilibs=m1,m3e,m4 ;;
+		sh*-*-netbsd*)	sh_multilibs=m3,m3e,m4 ;;
+		*) sh_multilibs=m1,m2,m2e,m4,m4-single,m4-single-only,m2a,m2a-single ;;
+		esac
+		if test x$with_fp = xno; then
+			sh_multilibs="`echo $sh_multilibs|sed -e s/m4/sh4-nofpu/ -e s/,m4-[^,]*//g -e s/,m[23]e// -e s/m2a,m2a-single/m2a-nofpu/ -e s/m5-..m....,//g`"
+		fi
+	fi
+	target_cpu_default=SELECT_`echo ${sh_cpu_default}|tr abcdefghijklmnopqrstuvwxyz- ABCDEFGHIJKLMNOPQRSTUVWXYZ_`
+	tm_defines=${tm_defines}' SH_MULTILIB_CPU_DEFAULT=\"'`echo $sh_cpu_default|sed s/sh/m/`'\"'
+	sh_multilibs=`echo $sh_multilibs,$sh_cpu_default | sed -e 's/[ 	,/][ 	,]*/ /g' -e 's/ $//' -e 's/^m/sh/' -e 's/ m/ sh/g' | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ_ abcdefghijklmnopqrstuvwxyz-`
+	for sh_multilib in ${sh_multilibs}; do
+		case ${sh_multilib} in
+		sh1 | sh2 | sh2e | sh3 | sh3e | \
+		sh4 | sh4-single | sh4-single-only | sh4-nofpu | sh4-300 |\
+		sh4a | sh4a-single | sh4a-single-only | sh4a-nofpu | sh4al | \
+		sh2a | sh2a-single | sh2a-single-only | sh2a-nofpu | \
+		sh5-64media | sh5-64media-nofpu | \
+		sh5-32media | sh5-32media-nofpu | \
+		sh5-compact | sh5-compact-nofpu)
+			tmake_file="${tmake_file} sh/t-mlib-${sh_multilib}"
+			tm_defines="$tm_defines SUPPORT_`echo $sh_multilib|tr abcdefghijklmnopqrstuvwxyz- ABCDEFGHIJKLMNOPQRSTUVWXYZ_`=1"
+			;;
+		*)
+			echo "with_multilib_list=${sh_multilib} not supported."
+			exit 1
+			;;
+		esac
+	done
+	if test x${enable_incomplete_targets} = xyes ; then
+		tm_defines="$tm_defines SUPPORT_SH1=1 SUPPORT_SH2E=1 SUPPORT_SH4=1 SUPPORT_SH4_SINGLE=1 SUPPORT_SH2A=1 SUPPORT_SH2A_SINGLE=1 SUPPORT_SH5_32MEDIA=1 SUPPORT_SH5_32MEDIA_NOFPU=1 SUPPORT_SH5_64MEDIA=1 SUPPORT_SH5_64MEDIA_NOFPU=1"
+	fi
+	;;
+sh-*-rtems*)
+	tmake_file="sh/t-sh sh/t-elf t-rtems sh/t-rtems"
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h sh/elf.h sh/embed-elf.h sh/rtemself.h rtems.h"
+	;;
+sh-wrs-vxworks)
+	tmake_file="$tmake_file sh/t-sh sh/t-elf sh/t-vxworks"
+	tm_file="${tm_file} elfos.h svr4.h sh/elf.h sh/embed-elf.h vx-common.h vxworks.h sh/vxworks.h"
+	;;
+sh-*-*)
+	tm_file="${tm_file} dbxcoff.h sh/coff.h"
+	;;
+sparc-*-netbsdelf*)
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h sparc/sysv4.h netbsd.h netbsd-elf.h sparc/netbsd-elf.h"
+	extra_options="${extra_options} sparc/long-double-switch.opt"
+	;;
+sparc64-*-openbsd*)
+	tm_file="sparc/openbsd1-64.h ${tm_file} dbxelf.h elfos.h svr4.h sparc/sysv4.h sparc/sp64-elf.h openbsd.h sparc/openbsd64.h"
+	extra_options="${extra_options} sparc/little-endian.opt"
+	gas=yes gnu_ld=yes
+	with_cpu=ultrasparc
+	;;
+sparc-*-elf*)
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h sparc/sysv4.h sparc/sp-elf.h"
+	tmake_file="sparc/t-elf sparc/t-crtfm"
+	extra_parts="crti.o crtn.o crtbegin.o crtend.o"
+	;;
+sparc-*-linux*)		# SPARC's running GNU/Linux, libc6
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h sparc/sysv4.h linux.h"
+	extra_options="${extra_options} sparc/long-double-switch.opt"
+	tmake_file="${tmake_file} sparc/t-linux"
+	if test x$enable_targets = xall; then
+		tm_file="sparc/biarch64.h ${tm_file} sparc/linux64.h"
+		tmake_file="${tmake_file} sparc/t-linux64"
+	else
+		tm_file="${tm_file} sparc/linux.h"
+	fi
+	tmake_file="${tmake_file} sparc/t-crtfm"
+	;;
+sparc-*-rtems*)
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h sparc/sysv4.h sparc/sp-elf.h sparc/rtemself.h rtems.h"
+	tmake_file="sparc/t-elf sparc/t-crtfm t-rtems"
+	extra_parts="crti.o crtn.o crtbegin.o crtend.o"
+	;;
+sparc64-*-solaris2* | sparcv9-*-solaris2*)
+	tm_file="sparc/biarch64.h ${tm_file} dbxelf.h elfos.h svr4.h sparc/sysv4.h sol2.h"
+	case ${target} in
+	*-*-solaris2.1[0-9]*)
+		tm_file="${tm_file} sol2-10.h"
+		;;
+	esac
+	tm_file="${tm_file} sparc/sol2.h sparc/sol2-64.h sparc/sol2-bi.h"
+	if test x$gnu_ld = xyes; then
+		tm_file="${tm_file} sparc/sol2-gld.h sparc/sol2-gld-bi.h"
+	fi
+	if test x$gas = xyes; then
+		tm_file="${tm_file} sparc/sol2-gas.h sparc/sol2-gas-bi.h"
+	fi
+	tm_file="${tm_file} tm-dwarf2.h"
+	tmake_file="t-sol2 sparc/t-sol2 sparc/t-sol2-64 sparc/t-crtfm"
+	if test x$gnu_ld = xyes; then
+		tmake_file="$tmake_file t-slibgcc-elf-ver"
+	else
+		tmake_file="$tmake_file t-slibgcc-sld"
+	fi
+	c_target_objs="sol2-c.o"
+	cxx_target_objs="sol2-c.o"
+	extra_objs="sol2.o"
+	tm_p_file="${tm_p_file} sol2-protos.h"
+	extra_parts="crt1.o crti.o crtn.o gcrt1.o crtbegin.o crtend.o"
+	case ${enable_threads}:${have_pthread_h}:${have_thread_h} in
+	  "":yes:* | yes:yes:* ) thread_file=posix ;;
+	  "":*:yes | yes:*:yes ) thread_file=solaris ;;
+	esac
+	;;
+sparc-*-solaris2*)
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h sparc/sysv4.h sol2.h"
+	case ${target} in
+	*-*-solaris2.1[0-9]*)
+		tm_file="${tm_file} sol2-10.h"
+		;;
+	esac
+	tm_file="${tm_file} sparc/sol2.h"
+	if test x$gnu_ld = xyes; then
+		tm_file="${tm_file} sparc/sol2-gld.h"
+	fi
+	if test x$gas = xyes; then
+		tm_file="${tm_file} sparc/sol2-gas.h"
+	fi
+	tmake_file="t-sol2 sparc/t-sol2 sparc/t-crtfm"
+	if test x$gnu_ld = xyes; then
+		tmake_file="$tmake_file t-slibgcc-elf-ver"
+	else
+		tmake_file="$tmake_file t-slibgcc-sld"
+	fi
+	tm_file="sparc/biarch64.h ${tm_file} sparc/sol2-bi.h"
+	if test x$gnu_ld = xyes; then
+		tm_file="${tm_file} sparc/sol2-gld-bi.h"
+	fi
+	if test x$gas = xyes; then
+		tm_file="${tm_file} sparc/sol2-gas-bi.h"
+	fi
+	tm_file="${tm_file} tm-dwarf2.h"
+	tmake_file="$tmake_file sparc/t-sol2-64"
+	test x$with_cpu != x || with_cpu=v9
+	c_target_objs="sol2-c.o"
+	cxx_target_objs="sol2-c.o"
+	extra_objs="sol2.o"
+	tm_p_file="${tm_p_file} sol2-protos.h"
+	extra_parts="crt1.o crti.o crtn.o gcrt1.o gmon.o crtbegin.o crtend.o"
+	case ${enable_threads}:${have_pthread_h}:${have_thread_h} in
+	  "":yes:* | yes:yes:* )
+		thread_file=posix
+		;;
+	  "":*:yes | yes:*:yes )
+		thread_file=solaris
+		;;
+	esac
+	;;
+sparc-wrs-vxworks)
+	tm_file="${tm_file} elfos.h svr4.h sparc/sysv4.h vx-common.h vxworks.h sparc/vxworks.h"
+	tmake_file="${tmake_file} sparc/t-vxworks"
+	;;
+sparc64-*-elf*)
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h sparc/sysv4.h sparc/sp64-elf.h"
+	extra_options="${extra_options} sparc/little-endian.opt"
+	tmake_file="${tmake_file} sparc/t-crtfm"
+	extra_parts="crtbegin.o crtend.o"
+	;;
+sparc64-*-freebsd*|ultrasparc-*-freebsd*)
+	tm_file="${tm_file} ${fbsd_tm_file} dbxelf.h elfos.h sparc/sysv4.h sparc/freebsd.h"
+	extra_options="${extra_options} sparc/long-double-switch.opt"
+	tmake_file="${tmake_file} sparc/t-crtfm"
+	case "x$with_cpu" in
+		xultrasparc) ;;
+		x) with_cpu=ultrasparc ;;
+		*) echo "$with_cpu not supported for freebsd target"; exit 1 ;;
+	esac
+	;;
+sparc64-*-linux*)		# 64-bit SPARC's running GNU/Linux
+	tm_file="sparc/biarch64.h ${tm_file} dbxelf.h elfos.h svr4.h sparc/sysv4.h linux.h sparc/linux64.h"
+	extra_options="${extra_options} sparc/long-double-switch.opt"
+	tmake_file="${tmake_file} sparc/t-linux sparc/t-linux64 sparc/t-crtfm"
+	;;
+sparc64-*-netbsd*)
+	tm_file="sparc/biarch64.h ${tm_file}"
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h sparc/sysv4.h netbsd.h netbsd-elf.h sparc/netbsd-elf.h"
+	extra_options="${extra_options} sparc/long-double-switch.opt"
+	tmake_file="${tmake_file} sparc/t-netbsd64"
+	;;
+spu-*-elf*)
+	tm_file="dbxelf.h elfos.h spu/spu-elf.h spu/spu.h"
+	tmake_file="spu/t-spu-elf"
+	extra_headers="spu_intrinsics.h spu_internals.h vmx2spu.h spu_mfcio.h vec_types.h"
+	extra_modes=spu/spu-modes.def
+	c_target_objs="${c_target_objs} spu-c.o"
+	cxx_target_objs="${cxx_target_objs} spu-c.o"
+	;;
+v850e1-*-*)
+	target_cpu_default="TARGET_CPU_v850e1"
+	tm_file="dbxelf.h elfos.h svr4.h v850/v850.h"
+	tm_p_file=v850/v850-protos.h
+	tmake_file=v850/t-v850e
+	md_file=v850/v850.md
+	out_file=v850/v850.c
+	extra_options="${extra_options} v850/v850.opt"
+	if test x$stabs = xyes
+	then
+		tm_file="${tm_file} dbx.h"
+	fi
+	use_collect2=no
+	c_target_objs="v850-c.o"
+	cxx_target_objs="v850-c.o"
+	;;
+v850e-*-*)
+	target_cpu_default="TARGET_CPU_v850e"
+	tm_file="dbxelf.h elfos.h svr4.h v850/v850.h"
+	tm_p_file=v850/v850-protos.h
+	tmake_file=v850/t-v850e
+	md_file=v850/v850.md
+	out_file=v850/v850.c
+	extra_options="${extra_options} v850/v850.opt"
+	if test x$stabs = xyes
+	then
+		tm_file="${tm_file} dbx.h"
+	fi
+	use_collect2=no
+	c_target_objs="v850-c.o"
+	cxx_target_objs="v850-c.o"
+	;;
+v850-*-*)
+	target_cpu_default="TARGET_CPU_generic"
+	tm_file="dbxelf.h elfos.h svr4.h ${tm_file}"
+	tmake_file=v850/t-v850
+	if test x$stabs = xyes
+	then
+		tm_file="${tm_file} dbx.h"
+	fi
+	use_collect2=no
+	c_target_objs="v850-c.o"
+	cxx_target_objs="v850-c.o"
+	;;
+vax-*-netbsdelf*)
+	tm_file="${tm_file} elfos.h netbsd.h netbsd-elf.h vax/elf.h vax/netbsd-elf.h"
+	;;
+vax-*-netbsd*)
+	tm_file="${tm_file} netbsd.h netbsd-aout.h vax/netbsd.h"
+	tmake_file=t-netbsd
+	extra_parts=""
+	use_collect2=yes
+	;;
+vax-*-openbsd*)
+	tm_file="vax/vax.h vax/openbsd1.h openbsd.h vax/openbsd.h"
+	use_collect2=yes
+	;;
+xstormy16-*-elf)
+	# For historical reasons, the target files omit the 'x'.
+	tm_file="dbxelf.h elfos.h svr4.h stormy16/stormy16.h"
+	tm_p_file=stormy16/stormy16-protos.h
+	md_file=stormy16/stormy16.md
+	out_file=stormy16/stormy16.c
+	extra_options=stormy16/stormy16.opt
+	tmake_file="stormy16/t-stormy16"
+	extra_parts="crtbegin.o crtend.o"
+	;;
+xtensa*-*-elf*)
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h xtensa/elf.h"
+	tmake_file="xtensa/t-xtensa xtensa/t-elf"
+	;;
+xtensa*-*-linux*)
+	tm_file="${tm_file} dbxelf.h elfos.h svr4.h linux.h xtensa/linux.h"
+	tmake_file="${tmake_file} xtensa/t-xtensa xtensa/t-linux"
+	;;
+am33_2.0-*-linux*)
+	tm_file="mn10300/mn10300.h dbxelf.h elfos.h linux.h mn10300/linux.h"
+	tmake_file="${tmake_file} mn10300/t-linux"
+	gas=yes gnu_ld=yes
+	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o"
+	use_collect2=no
+	;;
+m32c-*-rtems*)
+	tm_file="dbxelf.h elfos.h svr4.h ${tm_file} m32c/rtems.h rtems.h"
+	tmake_file="${tmake_file} t-rtems"
+	c_target_objs="m32c-pragma.o"
+	cxx_target_objs="m32c-pragma.o"
+ 	;;
+m32c-*-elf*)
+	tm_file="dbxelf.h elfos.h svr4.h ${tm_file}"
+	c_target_objs="m32c-pragma.o"
+	cxx_target_objs="m32c-pragma.o"
+ 	;;
+*)
+	echo "*** Configuration ${target} not supported" 1>&2
+	exit 1
+	;;
+esac
+
+case ${target} in
+i[34567]86-*-linux* | x86_64-*-linux*)
+	tmake_file="${tmake_file} i386/t-pmm_malloc i386/t-i386"
+	;;
+i[34567]86-*-* | x86_64-*-*)
+	tmake_file="${tmake_file} i386/t-gmm_malloc i386/t-i386"
+	;;
+esac
+
+# Support for --with-cpu and related options (and a few unrelated options,
+# too).
+case ${with_cpu} in
+  yes | no)
+    echo "--with-cpu must be passed a value" 1>&2
+    exit 1
+    ;;
+esac
+
+# If there is no $with_cpu option, try to infer one from ${target}.
+# This block sets nothing except for with_cpu.
+if test x$with_cpu = x ; then
+  case ${target} in
+    i386-*-*)
+      with_cpu=i386
+      ;;
+    i486-*-*)
+      with_cpu=i486
+      ;;
+    i586-*-*)
+      case ${target_noncanonical} in
+        k6_2-*)
+          with_cpu=k6-2
+          ;;
+        k6_3-*)
+          with_cpu=k6-3
+          ;;
+        k6-*)
+          with_cpu=k6
+          ;;
+        pentium_mmx-*|winchip_c6-*|winchip2-*|c3-*)
+          with_cpu=pentium-mmx
+          ;;
+        *)
+          with_cpu=pentium
+          ;;
+      esac
+      ;;
+    i686-*-* | i786-*-*)
+      case ${target_noncanonical} in
+        amdfam10-*|barcelona-*)
+          with_cpu=amdfam10
+          ;;
+        k8-*|opteron-*|athlon_64-*)
+          with_cpu=k8
+          ;;
+        athlon_xp-*|athlon_mp-*|athlon_4-*)
+          with_cpu=athlon-4
+          ;;
+        athlon_tbird-*|athlon-*)
+          with_cpu=athlon
+          ;;
+	geode-*)
+	  with_cpu=geode
+	  ;;
+        pentium2-*)
+          with_cpu=pentium2
+          ;;
+        pentium3-*|pentium3m-*)
+          with_cpu=pentium3
+          ;;
+        pentium4-*|pentium4m-*)
+          with_cpu=pentium4
+          ;;
+        prescott-*)
+          with_cpu=prescott
+          ;;
+        nocona-*)
+          with_cpu=nocona
+          ;;
+	core2-*)
+	  with_cpu=core2
+	  ;;
+        pentium_m-*)
+          with_cpu=pentium-m
+          ;;
+        pentiumpro-*)
+          with_cpu=pentiumpro
+          ;;
+        *)
+          with_cpu=generic
+          ;;
+      esac
+      ;;
+    x86_64-*-*)
+      case ${target_noncanonical} in
+        amdfam10-*|barcelona-*)
+          with_cpu=amdfam10
+          ;;
+        k8-*|opteron-*|athlon_64-*)
+          with_cpu=k8
+          ;;
+        nocona-*)
+          with_cpu=nocona
+          ;;
+	core2-*)
+	  with_cpu=core2
+	  ;;
+        *)
+          with_cpu=generic
+          ;;
+      esac
+      ;;
+    alphaev6[78]*-*-*)
+      with_cpu=ev67
+      ;;
+    alphaev6*-*-*)
+      with_cpu=ev6
+      ;;
+    alphapca56*-*-*)
+      with_cpu=pca56
+      ;;
+    alphaev56*-*-*)
+      with_cpu=ev56
+      ;;
+    alphaev5*-*-*)
+      with_cpu=ev5
+      ;;
+    frv-*-*linux* | frv400-*-*linux*)
+      with_cpu=fr400
+      ;;
+    frv550-*-*linux*)
+      with_cpu=fr550
+      ;;
+    m68k*-*-*)
+      case "$with_arch" in
+	"cf")
+	  with_cpu=${default_cf_cpu}
+	  ;;
+	"" | "m68k")
+	  with_cpu=m${default_m68k_cpu}
+	  ;;
+      esac
+      ;;
+    mips*-*-vxworks)
+      with_arch=mips2
+      ;;
+    sparc*-*-*)
+      with_cpu="`echo ${target} | sed 's/-.*$//'`"
+      ;;
+  esac
+
+  # Avoid overriding --with-cpu-32 and --with-cpu-64 values.
+  case ${target} in
+    i[34567]86-*-*|x86_64-*-*)
+      if test x$with_cpu != x; then
+        if test x$with_cpu_32 != x || test x$with_cpu_64 != x; then
+          if test x$with_cpu_32 = x; then
+            with_cpu_32=$with_cpu
+          fi
+          if test x$with_cpu_64 = x; then
+            with_cpu_64=$with_cpu
+          fi
+          with_cpu=
+        fi
+      fi
+      ;;
+  esac
+fi
+
+# Similarly for --with-schedule.
+if test x$with_schedule = x; then
+	case ${target} in
+	hppa1*)
+		# Override default PA8000 scheduling model.
+		with_schedule=7100LC
+		;;
+	esac
+fi
+
+# Validate and mark as valid any --with options supported
+# by this target.  In order to use a particular --with option
+# you must list it in supported_defaults; validating the value
+# is optional.  This case statement should set nothing besides
+# supported_defaults.
+
+supported_defaults=
+case "${target}" in
+	alpha*-*-*)
+		supported_defaults="cpu tune"
+		for which in cpu tune; do
+			eval "val=\$with_$which"
+			case "$val" in
+			"" \
+			| ev4 | ev45 | 21064 | ev5 | 21164 | ev56 | 21164a \
+			| pca56 | 21164PC | 21164pc | ev6 | 21264 | ev67 \
+			| 21264a)
+				;;
+			*)
+				echo "Unknown CPU used in --with-$which=$val" 1>&2
+				exit 1
+				;;
+			esac
+		done
+		;;
+
+	arm*-*-*)
+		supported_defaults="arch cpu float tune fpu abi mode"
+		for which in cpu tune; do
+			# See if it matches any of the entries in arm-cores.def
+			eval "val=\$with_$which"
+			if [ x"$val" = x ] \
+			    || grep "^ARM_CORE(\"$val\"," \
+				    ${srcdir}/config/arm/arm-cores.def \
+				    > /dev/null; then
+			  # Ok
+			  new_val=`grep "^ARM_CORE(\"$val\"," \
+				${srcdir}/config/arm/arm-cores.def | \
+				sed -e 's/^[^,]*,[ 	]*//' | \
+				sed -e 's/,.*$//'`
+			  eval "target_${which}_cname=$new_val"
+			echo "For $val real value is $new_val"
+			  true
+			else
+			  echo "Unknown CPU used in --with-$which=$val" 1>&2
+			  exit 1
+			fi
+		done
+
+		case "$with_arch" in
+		"" \
+		| armv[23456] | armv2a | armv3m | armv4t | armv5t \
+		| armv5te | armv6j |armv6k | armv6z | armv6zk | armv6-m \
+		| armv7 | armv7-a | armv7-r | armv7-m \
+		| iwmmxt | ep9312)
+			# OK
+			;;
+		*)
+			echo "Unknown arch used in --with-arch=$with_arch" 1>&2
+			exit 1
+			;;
+		esac
+
+		case "$with_float" in
+		"" \
+		| soft | hard | softfp)
+			# OK
+			;;
+		*)
+			echo "Unknown floating point type used in --with-float=$with_float" 1>&2
+			exit 1
+			;;
+		esac
+
+		case "$with_fpu" in
+		"" \
+		| fpa | fpe2 | fpe3 | maverick | vfp | vfp3 | neon )
+			# OK
+			;;
+		*)
+			echo "Unknown fpu used in --with-fpu=$with_fpu" 2>&1
+			exit 1
+			;;
+		esac
+
+		case "$with_abi" in
+		"" \
+		| apcs-gnu | atpcs | aapcs | iwmmxt | aapcs-linux )
+			#OK
+			;;
+		*)
+			echo "Unknown ABI used in --with-abi=$with_abi"
+			exit 1
+			;;
+		esac
+
+		case "$with_mode" in
+		"" \
+		| arm | thumb )
+			#OK
+			;;
+		*)
+			echo "Unknown mode used in --with-mode=$with_mode"
+			exit 1
+			;;
+		esac
+
+		if test "x$with_arch" != x && test "x$with_cpu" != x; then
+			echo "Warning: --with-arch overrides --with-cpu=$with_cpu" 1>&2
+		fi
+		;;
+
+	fr*-*-*linux*)
+		supported_defaults=cpu
+		case "$with_cpu" in
+		fr400) ;;
+		fr550) ;;
+		*)
+			echo "Unknown cpu used in --with-cpu=$with_cpu" 1>&2
+			exit 1
+			;;
+		esac
+		;;
+
+	fido-*-* | m68k*-*-*)
+		supported_defaults="arch cpu"
+		case "$with_arch" in
+		"" | "m68k"| "cf")
+			m68k_arch_family="$with_arch"
+			;;
+		*)
+			echo "Invalid --with-arch=$with_arch" 1>&2
+			exit 1
+			;;
+		esac
+
+		# We always have a $with_cpu setting here.
+		case "$with_cpu" in
+		"m68000" | "m68010" | "m68020" | "m68030" | "m68040" | "m68060")
+			m68k_cpu_ident=$with_cpu
+			;;
+		"m68020-40")
+			m68k_cpu_ident=m68020
+			tm_defines="$tm_defines M68K_DEFAULT_TUNE=u68020_40"
+			;;
+		"m68020-60")
+			m68k_cpu_ident=m68020
+			tm_defines="$tm_defines M68K_DEFAULT_TUNE=u68020_60"
+			;;
+		*)
+			# We need the C identifier rather than the string.
+			m68k_cpu_ident=`awk -v arg="\"$with_cpu\"" \
+			   'BEGIN { FS="[ \t]*[,()][ \t]*" }; \
+			    $1 == "M68K_DEVICE" && $2 == arg { print $3 }' \
+				 ${srcdir}/config/m68k/m68k-devices.def`
+			if [ x"$m68k_cpu_ident" = x ] ; then
+				echo "Unknown CPU used in --with-cpu=$with_cpu" 1>&2
+				exit 1
+			fi
+			with_cpu="mcpu=$with_cpu"
+			;;
+		esac
+		;;
+
+	hppa*-*-*)
+		supported_defaults="arch schedule"
+
+		case "$with_arch" in
+		"" | 1.0 | 1.1 | 2.0)
+			# OK
+			;;
+		*)
+			echo "Unknown architecture used in --with-arch=$with_arch" 1>&2
+			exit 1
+			;;
+		esac
+
+		case "$with_schedule" in
+		"" | 700 | 7100 | 7100LC | 7200 | 7300 | 8000)
+			# OK
+			;;
+		*)
+			echo "Unknown processor used in --with-schedule=$with_schedule." 1>&2
+			exit 1
+			;;
+		esac
+		;;
+
+	i[34567]86-*-* | x86_64-*-*)
+		supported_defaults="arch arch_32 arch_64 cpu cpu_32 cpu_64 tune tune_32 tune_64"
+		for which in arch arch_32 arch_64 cpu cpu_32 cpu_64 tune tune_32 tune_64; do
+			eval "val=\$with_$which"
+			case ${val} in
+			i386 | i486 \
+			| i586 | pentium | pentium-mmx | winchip-c6 | winchip2 \
+			| c3 | c3-2 | i686 | pentiumpro | pentium2 | pentium3 \
+			| pentium4 | k6 | k6-2 | k6-3 | athlon | athlon-tbird \
+			| athlon-4 | athlon-xp | athlon-mp | geode \
+			| prescott | pentium-m | pentium4m | pentium3m)
+				case "${target}" in
+				  x86_64-*-*)
+				      case "x$which" in
+					*_32)
+						;;
+					*)
+						echo "CPU given in --with-$which=$val doesn't support 64bit mode." 1>&2
+						exit 1
+						;;
+				      esac
+				      ;;
+				esac
+				# OK
+				;;
+			"" | amdfam10 | barcelona | k8 | opteron | athlon64 | athlon-fx | nocona | core2 | generic)
+				# OK
+				;;
+			*)
+				echo "Unknown CPU given in --with-$which=$val." 1>&2
+				exit 1
+				;;
+			esac
+		done
+		;;
+
+	mips*-*-*)
+		supported_defaults="abi arch float tune divide llsc mips-plt"
+
+		case ${with_float} in
+		"" | soft | hard)
+			# OK
+			;;
+		*)
+			echo "Unknown floating point type used in --with-float=$with_float" 1>&2
+			exit 1
+			;;
+		esac
+
+		case ${with_abi} in
+		"" | 32 | o64 | n32 | 64 | eabi)
+			# OK
+			;;
+		*)
+			echo "Unknown ABI used in --with-abi=$with_abi" 1>&2
+			exit 1
+			;;
+		esac
+
+		case ${with_divide} in
+		"" | breaks | traps)
+			# OK
+			;;
+		*)
+			echo "Unknown division check type use in --with-divide=$with_divide" 1>&2
+			exit 1
+			;;
+		esac
+
+		case ${with_llsc} in
+		yes)
+			with_llsc=llsc
+			;;
+		no)
+			with_llsc="no-llsc"
+			;;
+		"")
+			# OK
+			;;
+		*)
+			echo "Unknown llsc type used in --with-llsc" 1>&2
+			exit 1
+			;;
+		esac
+
+		case ${with_mips_plt} in
+		yes)
+			with_mips_plt=plt
+			;;
+		no)
+			with_mips_plt=no-plt
+			;;
+		"")
+			;;
+		*)
+			echo "Unknown --with-mips-plt argument: $with_mips_plt" 1>&2
+			exit 1
+			;;
+		esac
+		;;
+
+	powerpc*-*-* | rs6000-*-*)
+		supported_defaults="cpu float tune"
+
+		for which in cpu tune; do
+			eval "val=\$with_$which"
+			case ${val} in
+			default32 | default64)
+				with_which="with_$which"
+				eval $with_which=
+				;;
+			405cr)
+				tm_defines="${tm_defines} CONFIG_PPC405CR"
+				eval "with_$which=405"
+				;;
+			"" | common \
+			| power | power[234567] | power6x | powerpc | powerpc64 \
+			| rios | rios1 | rios2 | rsc | rsc1 | rs64a \
+			| 401 | 403 | 405 | 405fp | 440 | 440fp | 464 | 464fp \
+			| 505 | 601 | 602 | 603 | 603e | ec603e | 604 \
+			| 604e | 620 | 630 | 740 | 750 | 7400 | 7450 \
+			| e300c[23] | 854[08] | e500mc \
+			| 801 | 821 | 823 | 860 | 970 | G3 | G4 | G5 | cell)
+				# OK
+				;;
+			*)
+				echo "Unknown cpu used in --with-$which=$val." 1>&2
+				exit 1
+				;;
+			esac
+		done
+		;;
+
+	s390*-*-*)
+		supported_defaults="arch mode tune"
+
+		for which in arch tune; do
+			eval "val=\$with_$which"
+			case ${val} in
+			"" | g5 | g6 | z900 | z990 | z9-109 | z9-ec | z10)
+				# OK
+				;;
+			*)
+				echo "Unknown cpu used in --with-$which=$val." 1>&2
+				exit 1
+				;;
+			esac
+		done
+
+		case ${with_mode} in
+		"" | esa | zarch)
+			# OK
+			;;
+		*)
+			echo "Unknown architecture mode used in --with-mode=$with_mode." 1>&2
+			exit 1
+			;;
+		esac
+		;;
+
+	sh[123456ble]-*-* | sh-*-*)
+		supported_defaults="cpu"
+		case "`echo $with_cpu | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ_ abcdefghijklmnopqrstuvwxyz- | sed s/sh/m/`" in
+		"" | m1 | m2 | m2e | m3 | m3e | m4 | m4-single | m4-single-only | m4-nofpu )
+			# OK
+			;;
+		m2a | m2a-single | m2a-single-only | m2a-nofpu)
+			;;
+		m4a | m4a-single | m4a-single-only | m4a-nofpu | m4al)
+		        ;;
+		*)
+			echo "Unknown CPU used in --with-cpu=$with_cpu, known values:"  1>&2
+			echo "m1 m2 m2e m3 m3e m4 m4-single m4-single-only m4-nofpu" 1>&2
+			echo "m4a m4a-single m4a-single-only m4a-nofpu m4al" 1>&2
+			echo "m2a m2a-single m2a-single-only m2a-nofpu" 1>&2
+			exit 1
+			;;
+		esac
+		;;
+	sparc*-*-*)
+		supported_defaults="cpu float tune"
+
+		for which in cpu tune; do
+			eval "val=\$with_$which"
+			case ${val} in
+			"" | sparc | sparcv9 | sparc64 | sparc86x \
+			| v7 | cypress | v8 | supersparc | sparclite | f930 \
+			| f934 | hypersparc | sparclite86x | sparclet | tsc701 \
+			| v9 | ultrasparc | ultrasparc3 | niagara | niagara2)
+				# OK
+				;;
+			*)
+				echo "Unknown cpu used in --with-$which=$val" 1>&2
+				exit 1
+				;;
+			esac
+		done
+
+		case ${with_float} in
+		"" | soft | hard)
+			# OK
+			;;
+		*)
+			echo "Unknown floating point type used in --with-float=$with_float" 1>&2
+			exit 1
+			;;
+		esac
+		;;
+
+	spu-*-*)
+		supported_defaults="arch tune"
+
+		for which in arch tune; do
+			eval "val=\$with_$which"
+			case ${val} in
+			"" | cell | celledp)
+				# OK
+				;;
+			*)
+				echo "Unknown cpu used in --with-$which=$val." 1>&2
+				exit 1
+				;;
+			esac
+		done
+		;;
+
+	v850*-*-*)
+		supported_defaults=cpu
+		case ${with_cpu} in
+		"" | v850e | v850e1)
+			# OK
+			;;
+		*)
+			echo "Unknown cpu used in --with-cpu=$with_cpu" 1>&2
+			exit 1
+			;;
+		esac
+		;;
+esac
+
+# Set some miscellaneous flags for particular targets.
+target_cpu_default2=
+case ${target} in
+	alpha*-*-*)
+		if test x$gas = xyes
+		then
+			target_cpu_default2="MASK_GAS"
+		fi
+		;;
+
+	arm*-*-*)
+		if test x$target_cpu_cname = x
+		then
+			target_cpu_default2=TARGET_CPU_generic
+		else
+			target_cpu_default2=TARGET_CPU_$target_cpu_cname
+		fi
+		;;
+
+	hppa*-*-*)
+		target_cpu_default2="MASK_BIG_SWITCH"
+		if test x$gas = xyes
+		then
+			target_cpu_default2="${target_cpu_default2}|MASK_GAS|MASK_JUMP_IN_DELAY"
+		fi
+		;;
+
+	fido*-*-* | m68k*-*-*)
+		target_cpu_default2=$m68k_cpu_ident
+		if [ x"$m68k_arch_family" != x ]; then
+		        tmake_file="m68k/t-$m68k_arch_family $tmake_file"
+		fi
+		;;
+
+	i[34567]86-*-darwin* | x86_64-*-darwin*)
+		tmake_file="${tmake_file} i386/t-fprules-softfp soft-fp/t-softfp"
+		;;
+	i[34567]86-*-linux* | x86_64-*-linux* | i[34567]86-*-kfreebsd*-gnu | x86_64-*-kfreebsd*-gnu)
+		tmake_file="${tmake_file} i386/t-fprules-softfp soft-fp/t-softfp i386/t-linux"
+		;;
+	ia64*-*-linux*)
+		tmake_file="${tmake_file} ia64/t-fprules-softfp soft-fp/t-softfp"
+		;;
+
+	mips*-*-*)
+		if test x$gnu_ld = xyes
+		then
+			target_cpu_default2="MASK_SPLIT_ADDRESSES"
+		fi
+		case ${target} in
+			mips*el-*-*)
+				tm_defines="TARGET_ENDIAN_DEFAULT=0 $tm_defines"
+				;;
+		esac
+		if test "x$enable_gofast" = xyes
+		then
+			tm_defines="US_SOFTWARE_GOFAST $tm_defines"
+			tmake_file="mips/t-gofast $tmake_file"
+		else
+			tmake_file="mips/t-mips $tmake_file"
+		fi
+		;;
+
+	powerpc*-*-* | rs6000-*-*)
+		# FIXME: The PowerPC port uses the value set at compile time,
+		# although it's only cosmetic.
+		if test "x$with_cpu" != x
+		then
+			target_cpu_default2="\\\"$with_cpu\\\""
+		fi
+		out_file=rs6000/rs6000.c
+		c_target_objs="${c_target_objs} rs6000-c.o"
+		cxx_target_objs="${cxx_target_objs} rs6000-c.o"
+		tmake_file="rs6000/t-rs6000 ${tmake_file}"
+
+                if test x$enable_e500_double = xyes
+                then
+                        tm_file="$tm_file rs6000/e500-double.h"
+                fi
+		;;
+
+	sh[123456ble]*-*-* | sh-*-*)
+		c_target_objs="${c_target_objs} sh-c.o"
+		cxx_target_objs="${cxx_target_objs} sh-c.o"
+		;;
+
+	sparc*-*-*)
+		# Some standard aliases.
+		case x$with_cpu in
+		xsparc)
+			with_cpu=v7
+			;;
+		xsparcv9 | xsparc64)
+			with_cpu=v9
+			;;
+		esac
+
+		# The SPARC port checks this value at compile-time.
+		target_cpu_default2="TARGET_CPU_$with_cpu"
+		;;
+	v850*-*-*)
+		# FIXME: The v850 is "special" in that it does not support
+		# runtime CPU selection, only --with-cpu.
+		case "x$with_cpu" in
+		x)
+			;;
+		xv850e)
+			target_cpu_default2="TARGET_CPU_$with_cpu"
+			;;
+		esac
+		;;
+esac
+
+t=
+all_defaults="abi cpu cpu_32 cpu_64 arch arch_32 arch_64 tune tune_32 tune_64 schedule float mode fpu divide llsc mips-plt"
+for option in $all_defaults
+do
+	eval "val=\$with_"`echo $option | sed s/-/_/g`
+	if test -n "$val"; then
+		case " $supported_defaults " in
+		*" $option "*)
+			;;
+		*)
+			echo "This target does not support --with-$option." 2>&1
+			echo "Valid --with options are: $supported_defaults" 2>&1
+			exit 1
+			;;
+		esac
+
+		if test "x$t" = x
+		then
+			t="{ \"$option\", \"$val\" }"
+		else
+			t="${t}, { \"$option\", \"$val\" }"
+		fi
+	fi
+done
+
+if test "x$t" = x
+then
+	configure_default_options="{ { NULL, NULL} }"
+else
+	configure_default_options="{ ${t} }"
+fi
+
+if test "$target_cpu_default2" != ""
+then
+	if test "$target_cpu_default" != ""
+	then
+		target_cpu_default="(${target_cpu_default}|${target_cpu_default2})"
+	else
+		target_cpu_default=$target_cpu_default2
+	fi
+fi
diff -Naur gcc-4.4.2.orig/gcc/doc/contrib.texi gcc-4.4.2-rtems4.10-20091015/gcc/doc/contrib.texi
--- gcc-4.4.2.orig/gcc/doc/contrib.texi	2009-02-20 16:20:38.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/gcc/doc/contrib.texi	2009-10-15 18:36:00.000000000 +0200
@@ -55,7 +55,7 @@
 Wolfgang Bangerth for processing tons of bug reports.
 
 @item
-Jon Beniston for his Microsoft Windows port of Java.
+Jon Beniston for his Microsoft Windows port of Java and port to Lattice Mico32.
 
 @item
 Daniel Berlin for better DWARF2 support, faster/better optimizations,
diff -Naur gcc-4.4.2.orig/gcc/doc/install.texi gcc-4.4.2-rtems4.10-20091015/gcc/doc/install.texi
--- gcc-4.4.2.orig/gcc/doc/install.texi	2009-09-12 20:57:06.000000000 +0200
+++ gcc-4.4.2-rtems4.10-20091015/gcc/doc/install.texi	2009-10-15 18:36:00.000000000 +0200
@@ -2658,6 +2658,10 @@
 @item
 @uref{#iq2000-x-elf,,iq2000-*-elf}
 @item
+@uref{#lm32-x-elf,,lm32-*-elf}
+@item
+@uref{#lm32-x-uclinux,,lm32-*-uclinux}
+@item
 @uref{#m32c-x-elf,,m32c-*-elf}
 @item
 @uref{#m32r-x-elf,,m32r-*-elf}
@@ -3450,6 +3454,20 @@
 @html
 <hr />
 @end html
+@heading @anchor{lm32-x-elf}lm32-*-elf
+Lattice Mico32 processor.
+This configuration is intended for embedded systems.
+
+@html
+<hr />
+@end html
+@heading @anchor{lm32-x-uclinux}lm32-*-uclinux
+Lattice Mico32 processor.
+This configuration is intended for embedded systems running uClinux.
+
+@html
+<hr />
+@end html
 @heading @anchor{m32c-x-elf}m32c-*-elf
 Renesas M32C processor.
 This configuration is intended for embedded systems.
diff -Naur gcc-4.4.2.orig/gcc/doc/install.texi.orig gcc-4.4.2-rtems4.10-20091015/gcc/doc/install.texi.orig
--- gcc-4.4.2.orig/gcc/doc/install.texi.orig	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/gcc/doc/install.texi.orig	2009-10-15 18:36:00.000000000 +0200
@@ -0,0 +1,4324 @@
+\input texinfo.tex    @c -*-texinfo-*-
+@c @ifnothtml
+@c %**start of header
+@setfilename gccinstall.info
+@settitle Installing GCC
+@setchapternewpage odd
+@c %**end of header
+@c @end ifnothtml
+
+@include gcc-common.texi
+
+@c Specify title for specific html page
+@ifset indexhtml
+@settitle Installing GCC
+@end ifset
+@ifset specifichtml
+@settitle Host/Target specific installation notes for GCC
+@end ifset
+@ifset prerequisiteshtml
+@settitle Prerequisites for GCC
+@end ifset
+@ifset downloadhtml
+@settitle Downloading GCC
+@end ifset
+@ifset configurehtml
+@settitle Installing GCC: Configuration
+@end ifset
+@ifset buildhtml
+@settitle Installing GCC: Building
+@end ifset
+@ifset testhtml
+@settitle Installing GCC: Testing
+@end ifset
+@ifset finalinstallhtml
+@settitle Installing GCC: Final installation
+@end ifset
+@ifset binarieshtml
+@settitle Installing GCC: Binaries
+@end ifset
+@ifset oldhtml
+@settitle Installing GCC: Old documentation
+@end ifset
+@ifset gfdlhtml
+@settitle Installing GCC: GNU Free Documentation License
+@end ifset
+
+@c Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
+@c 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+@c *** Converted to texinfo by Dean Wakerley, dean@wakerley.com
+
+@c IMPORTANT: whenever you modify this file, run `install.texi2html' to
+@c test the generation of HTML documents for the gcc.gnu.org web pages.
+@c
+@c Do not use @footnote{} in this file as it breaks install.texi2html!
+
+@c Include everything if we're not making html
+@ifnothtml
+@set indexhtml
+@set specifichtml
+@set prerequisiteshtml
+@set downloadhtml
+@set configurehtml
+@set buildhtml
+@set testhtml
+@set finalinstallhtml
+@set binarieshtml
+@set oldhtml
+@set gfdlhtml
+@end ifnothtml
+
+@c Part 2 Summary Description and Copyright
+@copying
+Copyright @copyright{} 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997,
+1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
+2008 Free Software Foundation, Inc.
+@sp 1
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.2 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, the Front-Cover texts being (a) (see below), and
+with the Back-Cover Texts being (b) (see below).  A copy of the
+license is included in the section entitled ``@uref{./gfdl.html,,GNU
+Free Documentation License}''.
+
+(a) The FSF's Front-Cover Text is:
+
+     A GNU Manual
+
+(b) The FSF's Back-Cover Text is:
+
+     You have freedom to copy and modify this GNU Manual, like GNU
+     software.  Copies published by the Free Software Foundation raise
+     funds for GNU development.
+@end copying
+@ifinfo
+@insertcopying
+@end ifinfo
+@dircategory Software development
+@direntry
+* gccinstall: (gccinstall).    Installing the GNU Compiler Collection.
+@end direntry
+
+@c Part 3 Titlepage and Copyright
+@titlepage
+@title Installing GCC
+@versionsubtitle
+
+@c The following two commands start the copyright page.
+@page
+@vskip 0pt plus 1filll
+@insertcopying
+@end titlepage
+
+@c Part 4 Top node, Master Menu, and/or Table of Contents
+@ifinfo
+@node    Top, , , (dir)
+@comment node-name, next,          Previous, up
+
+@menu
+* Installing GCC::  This document describes the generic installation
+                    procedure for GCC as well as detailing some target
+                    specific installation instructions.
+
+* Specific::        Host/target specific installation notes for GCC.
+* Binaries::        Where to get pre-compiled binaries.
+
+* Old::             Old installation documentation.
+
+* GNU Free Documentation License:: How you can copy and share this manual.
+* Concept Index::   This index has two entries.
+@end menu
+@end ifinfo
+
+@iftex
+@contents
+@end iftex
+
+@c Part 5 The Body of the Document
+@c ***Installing GCC**********************************************************
+@ifnothtml
+@comment node-name,     next,          previous, up
+@node    Installing GCC, Binaries, , Top
+@end ifnothtml
+@ifset indexhtml
+@ifnothtml
+@chapter Installing GCC
+@end ifnothtml
+
+The latest version of this document is always available at
+@uref{http://gcc.gnu.org/install/,,http://gcc.gnu.org/install/}.
+
+This document describes the generic installation procedure for GCC as well
+as detailing some target specific installation instructions.
+
+GCC includes several components that previously were separate distributions
+with their own installation instructions.  This document supersedes all
+package specific installation instructions.
+
+@emph{Before} starting the build/install procedure please check the
+@ifnothtml
+@ref{Specific, host/target specific installation notes}.
+@end ifnothtml
+@ifhtml
+@uref{specific.html,,host/target specific installation notes}.
+@end ifhtml
+We recommend you browse the entire generic installation instructions before
+you proceed.
+
+Lists of successful builds for released versions of GCC are
+available at @uref{http://gcc.gnu.org/buildstat.html}.
+These lists are updated as new information becomes available.
+
+The installation procedure itself is broken into five steps.
+
+@ifinfo
+@menu
+* Prerequisites::
+* Downloading the source::
+* Configuration::
+* Building::
+* Testing:: (optional)
+* Final install::
+@end menu
+@end ifinfo
+@ifhtml
+@enumerate
+@item
+@uref{prerequisites.html,,Prerequisites}
+@item
+@uref{download.html,,Downloading the source}
+@item
+@uref{configure.html,,Configuration}
+@item
+@uref{build.html,,Building}
+@item
+@uref{test.html,,Testing} (optional)
+@item
+@uref{finalinstall.html,,Final install}
+@end enumerate
+@end ifhtml
+
+Please note that GCC does not support @samp{make uninstall} and probably
+won't do so in the near future as this would open a can of worms.  Instead,
+we suggest that you install GCC into a directory of its own and simply
+remove that directory when you do not need that specific version of GCC
+any longer, and, if shared libraries are installed there as well, no
+more binaries exist that use them.
+
+@ifhtml
+There are also some @uref{old.html,,old installation instructions},
+which are mostly obsolete but still contain some information which has
+not yet been merged into the main part of this manual.
+@end ifhtml
+
+@html
+<hr />
+<p>
+@end html
+@ifhtml
+@uref{./index.html,,Return to the GCC Installation page}
+
+@insertcopying
+@end ifhtml
+@end ifset
+
+@c ***Prerequisites**************************************************
+@ifnothtml
+@comment node-name,     next,          previous, up
+@node    Prerequisites, Downloading the source, , Installing GCC
+@end ifnothtml
+@ifset prerequisiteshtml
+@ifnothtml
+@chapter Prerequisites
+@end ifnothtml
+@cindex Prerequisites
+
+GCC requires that various tools and packages be available for use in the
+build procedure.  Modifying GCC sources requires additional tools
+described below.
+
+@heading Tools/packages necessary for building GCC
+@table @asis
+@item ISO C90 compiler
+Necessary to bootstrap GCC, although versions of GCC prior
+to 3.4 also allow bootstrapping with a traditional (K&R) C compiler.
+
+To build all languages in a cross-compiler or other configuration where
+3-stage bootstrap is not performed, you need to start with an existing
+GCC binary (version 2.95 or later) because source code for language
+frontends other than C might use GCC extensions.
+
+@item GNAT
+
+In order to build the Ada compiler (GNAT) you must already have GNAT
+installed because portions of the Ada frontend are written in Ada (with
+GNAT extensions.)  Refer to the Ada installation instructions for more
+specific information.
+
+@item A ``working'' POSIX compatible shell, or GNU bash
+
+Necessary when running @command{configure} because some
+@command{/bin/sh} shells have bugs and may crash when configuring the
+target libraries.  In other cases, @command{/bin/sh} or @command{ksh}
+have disastrous corner-case performance problems.  This
+can cause target @command{configure} runs to literally take days to
+complete in some cases.
+
+So on some platforms @command{/bin/ksh} is sufficient, on others it
+isn't.  See the host/target specific instructions for your platform, or
+use @command{bash} to be sure.  Then set @env{CONFIG_SHELL} in your
+environment to your ``good'' shell prior to running
+@command{configure}/@command{make}.
+
+@command{zsh} is not a fully compliant POSIX shell and will not
+work when configuring GCC@.
+
+@item A POSIX or SVR4 awk
+
+Necessary for creating some of the generated source files for GCC@.
+If in doubt, use a recent GNU awk version, as some of the older ones
+are broken.  GNU awk version 3.1.5 is known to work.
+
+@item GNU binutils
+
+Necessary in some circumstances, optional in others.  See the
+host/target specific instructions for your platform for the exact
+requirements.
+
+@item gzip version 1.2.4 (or later) or
+@itemx bzip2 version 1.0.2 (or later)
+
+Necessary to uncompress GCC @command{tar} files when source code is
+obtained via FTP mirror sites.
+
+@item GNU make version 3.80 (or later)
+
+You must have GNU make installed to build GCC@.
+
+@item GNU tar version 1.14 (or later)
+
+Necessary (only on some platforms) to untar the source code.  Many
+systems' @command{tar} programs will also work, only try GNU
+@command{tar} if you have problems.
+
+@item GNU Multiple Precision Library (GMP) version 4.1 (or later)
+
+Necessary to build GCC@.  If you do not have it installed in your
+library search path, you will have to configure with the
+@option{--with-gmp} configure option.  See also @option{--with-gmp-lib}
+and @option{--with-gmp-include}.  Alternatively, if a GMP source
+distribution is found in a subdirectory of your GCC sources named
+@file{gmp}, it will be built together with GCC@.
+
+@item MPFR Library version 2.3.2 (or later)
+
+Necessary to build GCC@.  It can be downloaded from
+@uref{http://www.mpfr.org/}.  The version of MPFR that is bundled with
+GMP 4.1.x contains numerous bugs.  Although GCC may appear to function
+with the buggy versions of MPFR, there are a few bugs that will not be
+fixed when using this version.  It is strongly recommended to upgrade
+to the recommended version of MPFR.
+
+The @option{--with-mpfr} configure option should be used if your MPFR
+Library is not installed in your default library search path.  See also
+@option{--with-mpfr-lib} and @option{--with-mpfr-include}.
+Alternatively, if a MPFR source distribution is found in a subdirectory
+of your GCC sources named @file{mpfr}, it will be built together with
+GCC@.
+
+@item Parma Polyhedra Library (PPL) version 0.10
+
+Necessary to build GCC with the Graphite loop optimizations.
+It can be downloaded from @uref{http://www.cs.unipr.it/ppl/Download/}.
+
+The @option{--with-ppl} configure option should be used if PPL is not
+installed in your default library search path.
+
+@item CLooG-PPL version 0.15
+
+Necessary to build GCC with the Graphite loop optimizations.  It can
+be downloaded from @uref{ftp://gcc.gnu.org/pub/gcc/infrastructure/}.
+The code in @file{cloog-ppl-0.15.tar.gz} comes from a branch of CLooG
+available from @uref{http://repo.or.cz/w/cloog-ppl.git}.  CLooG-PPL
+should be configured with @option{--with-ppl}.
+
+The @option{--with-cloog} configure option should be used if CLooG is
+not installed in your default library search path.
+
+@item @command{jar}, or InfoZIP (@command{zip} and @command{unzip})
+
+Necessary to build libgcj, the GCJ runtime.
+
+@end table
+
+
+@heading Tools/packages necessary for modifying GCC
+@table @asis
+@item autoconf version 2.59
+@itemx GNU m4 version 1.4 (or later)
+
+Necessary when modifying @file{configure.ac}, @file{aclocal.m4}, etc.@:
+to regenerate @file{configure} and @file{config.in} files.
+
+@item automake version 1.9.6
+
+Necessary when modifying a @file{Makefile.am} file to regenerate its
+associated @file{Makefile.in}.
+
+Much of GCC does not use automake, so directly edit the @file{Makefile.in}
+file.  Specifically this applies to the @file{gcc}, @file{intl},
+@file{libcpp}, @file{libiberty}, @file{libobjc} directories as well
+as any of their subdirectories.
+
+For directories that use automake, GCC requires the latest release in
+the 1.9.x series, which is currently 1.9.6.  When regenerating a directory
+to a newer version, please update all the directories using an older 1.9.x
+to the latest released version.
+
+@item gettext version 0.14.5 (or later)
+
+Needed to regenerate @file{gcc.pot}.
+
+@item gperf version 2.7.2 (or later)
+
+Necessary when modifying @command{gperf} input files, e.g.@:
+@file{gcc/cp/cfns.gperf} to regenerate its associated header file, e.g.@:
+@file{gcc/cp/cfns.h}.
+
+@item DejaGnu 1.4.4
+@itemx Expect
+@itemx Tcl
+
+Necessary to run the GCC testsuite; see the section on testing for details.
+
+@item autogen version 5.5.4 (or later) and
+@itemx guile version 1.4.1 (or later)
+
+Necessary to regenerate @file{fixinc/fixincl.x} from
+@file{fixinc/inclhack.def} and @file{fixinc/*.tpl}.
+
+Necessary to run @samp{make check} for @file{fixinc}.
+
+Necessary to regenerate the top level @file{Makefile.in} file from
+@file{Makefile.tpl} and @file{Makefile.def}.
+
+@item Flex version 2.5.4 (or later)
+
+Necessary when modifying @file{*.l} files.
+
+Necessary to build GCC during development because the generated output
+files are not included in the SVN repository.  They are included in
+releases.
+
+@item Texinfo version 4.7 (or later)
+
+Necessary for running @command{makeinfo} when modifying @file{*.texi}
+files to test your changes.
+
+Necessary for running @command{make dvi} or @command{make pdf} to
+create printable documentation in DVI or PDF format.  Texinfo version
+4.8 or later is required for @command{make pdf}.
+
+Necessary to build GCC documentation during development because the
+generated output files are not included in the SVN repository.  They are
+included in releases.
+
+@item @TeX{} (any working version)
+
+Necessary for running @command{texi2dvi} and @command{texi2pdf}, which 
+are used when running @command{make dvi} or @command{make pdf} to create
+DVI or PDF files, respectively.
+
+@item SVN (any version)
+@itemx SSH (any version)
+
+Necessary to access the SVN repository.  Public releases and weekly
+snapshots of the development sources are also available via FTP@.
+
+@item Perl version 5.6.1 (or later)
+
+Necessary when regenerating @file{Makefile} dependencies in libiberty.
+Necessary when regenerating @file{libiberty/functions.texi}.
+Necessary when generating manpages from Texinfo manuals.
+Necessary when targetting Darwin, building libstdc++,
+and not using @option{--disable-symvers}.
+Used by various scripts to generate some files included in SVN (mainly
+Unicode-related and rarely changing) from source tables.
+
+@item GNU diffutils version 2.7 (or later)
+
+Useful when submitting patches for the GCC source code.
+
+@item patch version 2.5.4 (or later)
+
+Necessary when applying patches, created with @command{diff}, to one's
+own sources.
+
+@item ecj1
+@itemx gjavah
+
+If you wish to modify @file{.java} files in libjava, you will need to
+configure with @option{--enable-java-maintainer-mode}, and you will need
+to have executables named @command{ecj1} and @command{gjavah} in your path.
+The @command{ecj1} executable should run the Eclipse Java compiler via
+the GCC-specific entry point.  You can download a suitable jar from
+@uref{ftp://sourceware.org/pub/java/}, or by running the script
+@command{contrib/download_ecj}.
+
+@item antlr.jar version 2.7.1 (or later)
+@itemx antlr binary
+
+If you wish to build the @command{gjdoc} binary in libjava, you will
+need to have a @file{antlr.jar} library available. The library is
+searched in system locations but can be configured with
+@option{--with-antlr-jar=} instead.  When configuring with
+@option{--enable-java-maintainer-mode}, you will need to have one of
+the executables named @command{cantlr}, @command{runantlr} or
+@command{antlr} in your path.
+
+@end table
+
+@html
+<hr />
+<p>
+@end html
+@ifhtml
+@uref{./index.html,,Return to the GCC Installation page}
+@end ifhtml
+@end ifset
+
+@c ***Downloading the source**************************************************
+@ifnothtml
+@comment node-name,     next,          previous, up
+@node    Downloading the source, Configuration, Prerequisites, Installing GCC
+@end ifnothtml
+@ifset downloadhtml
+@ifnothtml
+@chapter Downloading GCC
+@end ifnothtml
+@cindex Downloading GCC
+@cindex Downloading the Source
+
+GCC is distributed via @uref{http://gcc.gnu.org/svn.html,,SVN} and FTP
+tarballs compressed with @command{gzip} or
+@command{bzip2}.  It is possible to download a full distribution or specific
+components.
+
+Please refer to the @uref{http://gcc.gnu.org/releases.html,,releases web page}
+for information on how to obtain GCC@.
+
+The full distribution includes the C, C++, Objective-C, Fortran, Java,
+and Ada (in the case of GCC 3.1 and later) compilers.  The full
+distribution also includes runtime libraries for C++, Objective-C,
+Fortran, and Java.  In GCC 3.0 and later versions, the GNU compiler
+testsuites are also included in the full distribution.
+
+If you choose to download specific components, you must download the core
+GCC distribution plus any language specific distributions you wish to
+use.  The core distribution includes the C language front end as well as the
+shared components.  Each language has a tarball which includes the language
+front end as well as the language runtime (when appropriate).
+
+Unpack the core distribution as well as any language specific
+distributions in the same directory.
+
+If you also intend to build binutils (either to upgrade an existing
+installation or for use in place of the corresponding tools of your
+OS), unpack the binutils distribution either in the same directory or
+a separate one.  In the latter case, add symbolic links to any
+components of the binutils you intend to build alongside the compiler
+(@file{bfd}, @file{binutils}, @file{gas}, @file{gprof}, @file{ld},
+@file{opcodes}, @dots{}) to the directory containing the GCC sources.
+
+Likewise, the GMP and MPFR libraries can be automatically built together
+with GCC.  Unpack the GMP and/or MPFR source distributions in the
+directory containing the GCC sources and rename their directories to
+@file{gmp} and @file{mpfr}, respectively (or use symbolic links with the
+same name).
+
+@html
+<hr />
+<p>
+@end html
+@ifhtml
+@uref{./index.html,,Return to the GCC Installation page}
+@end ifhtml
+@end ifset
+
+@c ***Configuration***********************************************************
+@ifnothtml
+@comment node-name,     next,          previous, up
+@node    Configuration, Building, Downloading the source, Installing GCC
+@end ifnothtml
+@ifset configurehtml
+@ifnothtml
+@chapter Installing GCC: Configuration
+@end ifnothtml
+@cindex Configuration
+@cindex Installing GCC: Configuration
+
+Like most GNU software, GCC must be configured before it can be built.
+This document describes the recommended configuration procedure
+for both native and cross targets.
+
+We use @var{srcdir} to refer to the toplevel source directory for
+GCC; we use @var{objdir} to refer to the toplevel build/object directory.
+
+If you obtained the sources via SVN, @var{srcdir} must refer to the top
+@file{gcc} directory, the one where the @file{MAINTAINERS} can be found,
+and not its @file{gcc} subdirectory, otherwise the build will fail.
+
+If either @var{srcdir} or @var{objdir} is located on an automounted NFS
+file system, the shell's built-in @command{pwd} command will return
+temporary pathnames.  Using these can lead to various sorts of build
+problems.  To avoid this issue, set the @env{PWDCMD} environment
+variable to an automounter-aware @command{pwd} command, e.g.,
+@command{pawd} or @samp{amq -w}, during the configuration and build
+phases.
+
+First, we @strong{highly} recommend that GCC be built into a
+separate directory than the sources which does @strong{not} reside
+within the source tree.  This is how we generally build GCC; building
+where @var{srcdir} == @var{objdir} should still work, but doesn't
+get extensive testing; building where @var{objdir} is a subdirectory
+of @var{srcdir} is unsupported.
+
+If you have previously built GCC in the same directory for a
+different target machine, do @samp{make distclean} to delete all files
+that might be invalid.  One of the files this deletes is @file{Makefile};
+if @samp{make distclean} complains that @file{Makefile} does not exist
+or issues a message like ``don't know how to make distclean'' it probably
+means that the directory is already suitably clean.  However, with the
+recommended method of building in a separate @var{objdir}, you should
+simply use a different @var{objdir} for each target.
+
+Second, when configuring a native system, either @command{cc} or
+@command{gcc} must be in your path or you must set @env{CC} in
+your environment before running configure.  Otherwise the configuration
+scripts may fail.
+
+@ignore
+Note that the bootstrap compiler and the resulting GCC must be link
+compatible, else the bootstrap will fail with linker errors about
+incompatible object file formats.  Several multilibed targets are
+affected by this requirement, see
+@ifnothtml
+@ref{Specific, host/target specific installation notes}.
+@end ifnothtml
+@ifhtml
+@uref{specific.html,,host/target specific installation notes}.
+@end ifhtml
+@end ignore
+
+To configure GCC:
+
+@smallexample
+   % mkdir @var{objdir}
+   % cd @var{objdir}
+   % @var{srcdir}/configure [@var{options}] [@var{target}]
+@end smallexample
+
+@heading Distributor options
+
+If you will be distributing binary versions of GCC, with modifications
+to the source code, you should use the options described in this
+section to make clear that your version contains modifications.
+
+@table @code
+@item --with-pkgversion=@var{version}
+Specify a string that identifies your package.  You may wish
+to include a build number or build date.  This version string will be
+included in the output of @command{gcc --version}.  This suffix does
+not replace the default version string, only the @samp{GCC} part.
+
+The default value is @samp{GCC}.
+
+@item --with-bugurl=@var{url}
+Specify the URL that users should visit if they wish to report a bug.
+You are of course welcome to forward bugs reported to you to the FSF,
+if you determine that they are not bugs in your modifications.
+
+The default value refers to the FSF's GCC bug tracker.
+
+@end table
+
+@heading Target specification
+@itemize @bullet
+@item
+GCC has code to correctly determine the correct value for @var{target}
+for nearly all native systems.  Therefore, we highly recommend you not
+provide a configure target when configuring a native compiler.
+
+@item
+@var{target} must be specified as @option{--target=@var{target}}
+when configuring a cross compiler; examples of valid targets would be
+m68k-coff, sh-elf, etc.
+
+@item
+Specifying just @var{target} instead of @option{--target=@var{target}}
+implies that the host defaults to @var{target}.
+@end itemize
+
+
+@heading Options specification
+
+Use @var{options} to override several configure time options for
+GCC@.  A list of supported @var{options} follows; @samp{configure
+--help} may list other options, but those not listed below may not
+work and should not normally be used.
+
+Note that each @option{--enable} option has a corresponding
+@option{--disable} option and that each @option{--with} option has a
+corresponding @option{--without} option.
+
+@table @code
+@item --prefix=@var{dirname}
+Specify the toplevel installation
+directory.  This is the recommended way to install the tools into a directory
+other than the default.  The toplevel installation directory defaults to
+@file{/usr/local}.
+
+We @strong{highly} recommend against @var{dirname} being the same or a
+subdirectory of @var{objdir} or vice versa.  If specifying a directory
+beneath a user's home directory tree, some shells will not expand
+@var{dirname} correctly if it contains the @samp{~} metacharacter; use
+@env{$HOME} instead.
+
+The following standard @command{autoconf} options are supported.  Normally you
+should not need to use these options.
+@table @code
+@item --exec-prefix=@var{dirname}
+Specify the toplevel installation directory for architecture-dependent
+files.  The default is @file{@var{prefix}}.
+
+@item --bindir=@var{dirname}
+Specify the installation directory for the executables called by users
+(such as @command{gcc} and @command{g++}).  The default is
+@file{@var{exec-prefix}/bin}.
+
+@item --libdir=@var{dirname}
+Specify the installation directory for object code libraries and
+internal data files of GCC@.  The default is @file{@var{exec-prefix}/lib}.
+
+@item --libexecdir=@var{dirname}
+Specify the installation directory for internal executables of GCC@.
+The default is @file{@var{exec-prefix}/libexec}.
+
+@item --with-slibdir=@var{dirname}
+Specify the installation directory for the shared libgcc library.  The
+default is @file{@var{libdir}}.
+
+@item --infodir=@var{dirname}
+Specify the installation directory for documentation in info format.
+The default is @file{@var{prefix}/info}.
+
+@item --datadir=@var{dirname}
+Specify the installation directory for some architecture-independent
+data files referenced by GCC@.  The default is @file{@var{prefix}/share}.
+
+@item --mandir=@var{dirname}
+Specify the installation directory for manual pages.  The default is
+@file{@var{prefix}/man}.  (Note that the manual pages are only extracts from
+the full GCC manuals, which are provided in Texinfo format.  The manpages
+are derived by an automatic conversion process from parts of the full
+manual.)
+
+@item --with-gxx-include-dir=@var{dirname}
+Specify
+the installation directory for G++ header files.  The default is
+@file{@var{prefix}/include/c++/@var{version}}.
+
+@end table
+
+@item --program-prefix=@var{prefix}
+GCC supports some transformations of the names of its programs when
+installing them.  This option prepends @var{prefix} to the names of
+programs to install in @var{bindir} (see above).  For example, specifying
+@option{--program-prefix=foo-} would result in @samp{gcc}
+being installed as @file{/usr/local/bin/foo-gcc}.
+
+@item --program-suffix=@var{suffix}
+Appends @var{suffix} to the names of programs to install in @var{bindir}
+(see above).  For example, specifying @option{--program-suffix=-3.1}
+would result in @samp{gcc} being installed as
+@file{/usr/local/bin/gcc-3.1}.
+
+@item --program-transform-name=@var{pattern}
+Applies the @samp{sed} script @var{pattern} to be applied to the names
+of programs to install in @var{bindir} (see above).  @var{pattern} has to
+consist of one or more basic @samp{sed} editing commands, separated by
+semicolons.  For example, if you want the @samp{gcc} program name to be
+transformed to the installed program @file{/usr/local/bin/myowngcc} and
+the @samp{g++} program name to be transformed to
+@file{/usr/local/bin/gspecial++} without changing other program names,
+you could use the pattern
+@option{--program-transform-name='s/^gcc$/myowngcc/; s/^g++$/gspecial++/'}
+to achieve this effect.
+
+All three options can be combined and used together, resulting in more
+complex conversion patterns.  As a basic rule, @var{prefix} (and
+@var{suffix}) are prepended (appended) before further transformations
+can happen with a special transformation script @var{pattern}.
+
+As currently implemented, this option only takes effect for native
+builds; cross compiler binaries' names are not transformed even when a
+transformation is explicitly asked for by one of these options.
+
+For native builds, some of the installed programs are also installed
+with the target alias in front of their name, as in
+@samp{i686-pc-linux-gnu-gcc}.  All of the above transformations happen
+before the target alias is prepended to the name---so, specifying
+@option{--program-prefix=foo-} and @option{program-suffix=-3.1}, the
+resulting binary would be installed as
+@file{/usr/local/bin/i686-pc-linux-gnu-foo-gcc-3.1}.
+
+As a last shortcoming, none of the installed Ada programs are
+transformed yet, which will be fixed in some time.
+
+@item --with-local-prefix=@var{dirname}
+Specify the
+installation directory for local include files.  The default is
+@file{/usr/local}.  Specify this option if you want the compiler to
+search directory @file{@var{dirname}/include} for locally installed
+header files @emph{instead} of @file{/usr/local/include}.
+
+You should specify @option{--with-local-prefix} @strong{only} if your
+site has a different convention (not @file{/usr/local}) for where to put
+site-specific files.
+
+The default value for @option{--with-local-prefix} is @file{/usr/local}
+regardless of the value of @option{--prefix}.  Specifying
+@option{--prefix} has no effect on which directory GCC searches for
+local header files.  This may seem counterintuitive, but actually it is
+logical.
+
+The purpose of @option{--prefix} is to specify where to @emph{install
+GCC}.  The local header files in @file{/usr/local/include}---if you put
+any in that directory---are not part of GCC@.  They are part of other
+programs---perhaps many others.  (GCC installs its own header files in
+another directory which is based on the @option{--prefix} value.)
+
+Both the local-prefix include directory and the GCC-prefix include
+directory are part of GCC's ``system include'' directories.  Although these
+two directories are not fixed, they need to be searched in the proper
+order for the correct processing of the include_next directive.  The
+local-prefix include directory is searched before the GCC-prefix
+include directory.  Another characteristic of system include directories
+is that pedantic warnings are turned off for headers in these directories.
+
+Some autoconf macros add @option{-I @var{directory}} options to the
+compiler command line, to ensure that directories containing installed
+packages' headers are searched.  When @var{directory} is one of GCC's
+system include directories, GCC will ignore the option so that system
+directories continue to be processed in the correct order.  This
+may result in a search order different from what was specified but the
+directory will still be searched.
+
+GCC automatically searches for ordinary libraries using
+@env{GCC_EXEC_PREFIX}.  Thus, when the same installation prefix is
+used for both GCC and packages, GCC will automatically search for
+both headers and libraries.  This provides a configuration that is
+easy to use.  GCC behaves in a manner similar to that when it is
+installed as a system compiler in @file{/usr}.
+
+Sites that need to install multiple versions of GCC may not want to
+use the above simple configuration.  It is possible to use the
+@option{--program-prefix}, @option{--program-suffix} and
+@option{--program-transform-name} options to install multiple versions
+into a single directory, but it may be simpler to use different prefixes
+and the @option{--with-local-prefix} option to specify the location of the
+site-specific files for each version.  It will then be necessary for
+users to specify explicitly the location of local site libraries
+(e.g., with @env{LIBRARY_PATH}).
+
+The same value can be used for both @option{--with-local-prefix} and
+@option{--prefix} provided it is not @file{/usr}.  This can be used
+to avoid the default search of @file{/usr/local/include}.
+
+@strong{Do not} specify @file{/usr} as the @option{--with-local-prefix}!
+The directory you use for @option{--with-local-prefix} @strong{must not}
+contain any of the system's standard header files.  If it did contain
+them, certain programs would be miscompiled (including GNU Emacs, on
+certain targets), because this would override and nullify the header
+file corrections made by the @command{fixincludes} script.
+
+Indications are that people who use this option use it based on mistaken
+ideas of what it is for.  People use it as if it specified where to
+install part of GCC@.  Perhaps they make this assumption because
+installing GCC creates the directory.
+
+@item --enable-shared[=@var{package}[,@dots{}]]
+Build shared versions of libraries, if shared libraries are supported on
+the target platform.  Unlike GCC 2.95.x and earlier, shared libraries
+are enabled by default on all platforms that support shared libraries.
+
+If a list of packages is given as an argument, build shared libraries
+only for the listed packages.  For other packages, only static libraries
+will be built.  Package names currently recognized in the GCC tree are
+@samp{libgcc} (also known as @samp{gcc}), @samp{libstdc++} (not
+@samp{libstdc++-v3}), @samp{libffi}, @samp{zlib}, @samp{boehm-gc},
+@samp{ada}, @samp{libada}, @samp{libjava} and @samp{libobjc}.
+Note @samp{libiberty} does not support shared libraries at all.
+
+Use @option{--disable-shared} to build only static libraries.  Note that
+@option{--disable-shared} does not accept a list of package names as
+argument, only @option{--enable-shared} does.
+
+@item @anchor{with-gnu-as}--with-gnu-as
+Specify that the compiler should assume that the
+assembler it finds is the GNU assembler.  However, this does not modify
+the rules to find an assembler and will result in confusion if the
+assembler found is not actually the GNU assembler.  (Confusion may also
+result if the compiler finds the GNU assembler but has not been
+configured with @option{--with-gnu-as}.)  If you have more than one
+assembler installed on your system, you may want to use this option in
+connection with @option{--with-as=@var{pathname}} or
+@option{--with-build-time-tools=@var{pathname}}.
+
+The following systems are the only ones where it makes a difference
+whether you use the GNU assembler.  On any other system,
+@option{--with-gnu-as} has no effect.
+
+@itemize @bullet
+@item @samp{hppa1.0-@var{any}-@var{any}}
+@item @samp{hppa1.1-@var{any}-@var{any}}
+@item @samp{sparc-sun-solaris2.@var{any}}
+@item @samp{sparc64-@var{any}-solaris2.@var{any}}
+@end itemize
+
+@item @anchor{with-as}--with-as=@var{pathname}
+Specify that the compiler should use the assembler pointed to by
+@var{pathname}, rather than the one found by the standard rules to find
+an assembler, which are:
+@itemize @bullet
+@item
+Unless GCC is being built with a cross compiler, check the
+@file{@var{libexec}/gcc/@var{target}/@var{version}} directory.
+@var{libexec} defaults to @file{@var{exec-prefix}/libexec};
+@var{exec-prefix} defaults to @var{prefix}, which
+defaults to @file{/usr/local} unless overridden by the
+@option{--prefix=@var{pathname}} switch described above.  @var{target}
+is the target system triple, such as @samp{sparc-sun-solaris2.7}, and
+@var{version} denotes the GCC version, such as 3.0.
+
+@item
+If the target system is the same that you are building on, check
+operating system specific directories (e.g.@: @file{/usr/ccs/bin} on
+Sun Solaris 2).
+
+@item
+Check in the @env{PATH} for a tool whose name is prefixed by the
+target system triple.
+
+@item
+Check in the @env{PATH} for a tool whose name is not prefixed by the
+target system triple, if the host and target system triple are
+the same (in other words, we use a host tool if it can be used for
+the target as well).
+@end itemize
+
+You may want to use @option{--with-as} if no assembler
+is installed in the directories listed above, or if you have multiple
+assemblers installed and want to choose one that is not found by the
+above rules.
+
+@item @anchor{with-gnu-ld}--with-gnu-ld
+Same as @uref{#with-gnu-as,,@option{--with-gnu-as}}
+but for the linker.
+
+@item --with-ld=@var{pathname}
+Same as @uref{#with-as,,@option{--with-as}}
+but for the linker.
+
+@item --with-stabs
+Specify that stabs debugging
+information should be used instead of whatever format the host normally
+uses.  Normally GCC uses the same debug format as the host system.
+
+On MIPS based systems and on Alphas, you must specify whether you want
+GCC to create the normal ECOFF debugging format, or to use BSD-style
+stabs passed through the ECOFF symbol table.  The normal ECOFF debug
+format cannot fully handle languages other than C@.  BSD stabs format can
+handle other languages, but it only works with the GNU debugger GDB@.
+
+Normally, GCC uses the ECOFF debugging format by default; if you
+prefer BSD stabs, specify @option{--with-stabs} when you configure GCC@.
+
+No matter which default you choose when you configure GCC, the user
+can use the @option{-gcoff} and @option{-gstabs+} options to specify explicitly
+the debug format for a particular compilation.
+
+@option{--with-stabs} is meaningful on the ISC system on the 386, also, if
+@option{--with-gas} is used.  It selects use of stabs debugging
+information embedded in COFF output.  This kind of debugging information
+supports C++ well; ordinary COFF debugging information does not.
+
+@option{--with-stabs} is also meaningful on 386 systems running SVR4.  It
+selects use of stabs debugging information embedded in ELF output.  The
+C++ compiler currently (2.6.0) does not support the DWARF debugging
+information normally used on 386 SVR4 platforms; stabs provide a
+workable alternative.  This requires gas and gdb, as the normal SVR4
+tools can not generate or interpret stabs.
+
+@item --disable-multilib
+Specify that multiple target
+libraries to support different target variants, calling
+conventions, etc.@: should not be built.  The default is to build a
+predefined set of them.
+
+Some targets provide finer-grained control over which multilibs are built
+(e.g., @option{--disable-softfloat}):
+@table @code
+@item arc-*-elf*
+biendian.
+
+@item arm-*-*
+fpu, 26bit, underscore, interwork, biendian, nofmult.
+
+@item m68*-*-*
+softfloat, m68881, m68000, m68020.
+
+@item mips*-*-*
+single-float, biendian, softfloat.
+
+@item powerpc*-*-*, rs6000*-*-*
+aix64, pthread, softfloat, powercpu, powerpccpu, powerpcos, biendian,
+sysv, aix.
+
+@end table
+
+@item --enable-threads
+Specify that the target
+supports threads.  This affects the Objective-C compiler and runtime
+library, and exception handling for other languages like C++ and Java.
+On some systems, this is the default.
+
+In general, the best (and, in many cases, the only known) threading
+model available will be configured for use.  Beware that on some
+systems, GCC has not been taught what threading models are generally
+available for the system.  In this case, @option{--enable-threads} is an
+alias for @option{--enable-threads=single}.
+
+@item --disable-threads
+Specify that threading support should be disabled for the system.
+This is an alias for @option{--enable-threads=single}.
+
+@item --enable-threads=@var{lib}
+Specify that
+@var{lib} is the thread support library.  This affects the Objective-C
+compiler and runtime library, and exception handling for other languages
+like C++ and Java.  The possibilities for @var{lib} are:
+
+@table @code
+@item aix
+AIX thread support.
+@item dce
+DCE thread support.
+@item gnat
+Ada tasking support.  For non-Ada programs, this setting is equivalent
+to @samp{single}.  When used in conjunction with the Ada run time, it
+causes GCC to use the same thread primitives as Ada uses.  This option
+is necessary when using both Ada and the back end exception handling,
+which is the default for most Ada targets.
+@item mach
+Generic MACH thread support, known to work on NeXTSTEP@.  (Please note
+that the file needed to support this configuration, @file{gthr-mach.h}, is
+missing and thus this setting will cause a known bootstrap failure.)
+@item no
+This is an alias for @samp{single}.
+@item posix
+Generic POSIX/Unix98 thread support.
+@item posix95
+Generic POSIX/Unix95 thread support.
+@item rtems
+RTEMS thread support.
+@item single
+Disable thread support, should work for all platforms.
+@item solaris
+Sun Solaris 2 thread support.
+@item vxworks
+VxWorks thread support.
+@item win32
+Microsoft Win32 API thread support.
+@item nks
+Novell Kernel Services thread support.
+@end table
+
+@item --enable-tls
+Specify that the target supports TLS (Thread Local Storage).  Usually
+configure can correctly determine if TLS is supported.  In cases where
+it guesses incorrectly, TLS can be explicitly enabled or disabled with
+@option{--enable-tls} or @option{--disable-tls}.  This can happen if
+the assembler supports TLS but the C library does not, or if the
+assumptions made by the configure test are incorrect.
+
+@item --disable-tls
+Specify that the target does not support TLS.
+This is an alias for @option{--enable-tls=no}.
+
+@item --with-cpu=@var{cpu}
+@itemx --with-cpu-32=@var{cpu}
+@itemx --with-cpu-64=@var{cpu}
+Specify which cpu variant the compiler should generate code for by default.
+@var{cpu} will be used as the default value of the @option{-mcpu=} switch.
+This option is only supported on some targets, including ARM, i386, M68k,
+PowerPC, and SPARC@.  The @option{--with-cpu-32} and
+@option{--with-cpu-64} options specify separate default CPUs for
+32-bit and 64-bit modes; these options are only supported for i386 and
+x86-64.
+
+@item --with-schedule=@var{cpu}
+@itemx --with-arch=@var{cpu}
+@itemx --with-arch-32=@var{cpu}
+@itemx --with-arch-64=@var{cpu}
+@itemx --with-tune=@var{cpu}
+@itemx --with-tune-32=@var{cpu}
+@itemx --with-tune-64=@var{cpu}
+@itemx --with-abi=@var{abi}
+@itemx --with-fpu=@var{type}
+@itemx --with-float=@var{type}
+These configure options provide default values for the @option{-mschedule=},
+@option{-march=}, @option{-mtune=}, @option{-mabi=}, and @option{-mfpu=}
+options and for @option{-mhard-float} or @option{-msoft-float}.  As with
+@option{--with-cpu}, which switches will be accepted and acceptable values
+of the arguments depend on the target.
+
+@item --with-mode=@var{mode}
+Specify if the compiler should default to @option{-marm} or @option{-mthumb}.
+This option is only supported on ARM targets.
+
+@item --with-divide=@var{type}
+Specify how the compiler should generate code for checking for
+division by zero.  This option is only supported on the MIPS target.
+The possibilities for @var{type} are:
+@table @code
+@item traps
+Division by zero checks use conditional traps (this is the default on
+systems that support conditional traps).
+@item breaks
+Division by zero checks use the break instruction.
+@end table
+
+@c If you make --with-llsc the default for additional targets,
+@c update the --with-llsc description in the MIPS section below.
+
+@item --with-llsc
+On MIPS targets, make @option{-mllsc} the default when no
+@option{-mno-lsc} option is passed.  This is the default for
+Linux-based targets, as the kernel will emulate them if the ISA does
+not provide them.
+
+@item --without-llsc
+On MIPS targets, make @option{-mno-llsc} the default when no
+@option{-mllsc} option is passed.
+
+@item --with-mips-plt
+On MIPS targets, make use of copy relocations and PLTs.
+These features are extensions to the traditional
+SVR4-based MIPS ABIs and require support from GNU binutils
+and the runtime C library.
+
+@item --enable-__cxa_atexit
+Define if you want to use __cxa_atexit, rather than atexit, to
+register C++ destructors for local statics and global objects.
+This is essential for fully standards-compliant handling of
+destructors, but requires __cxa_atexit in libc.  This option is currently
+only available on systems with GNU libc.  When enabled, this will cause
+@option{-fuse-cxa-atexit} to be passed by default.
+
+@item --enable-target-optspace
+Specify that target
+libraries should be optimized for code space instead of code speed.
+This is the default for the m32r platform.
+
+@item --disable-cpp
+Specify that a user visible @command{cpp} program should not be installed.
+
+@item --with-cpp-install-dir=@var{dirname}
+Specify that the user visible @command{cpp} program should be installed
+in @file{@var{prefix}/@var{dirname}/cpp}, in addition to @var{bindir}.
+
+@item --enable-initfini-array
+Force the use of sections @code{.init_array} and @code{.fini_array}
+(instead of @code{.init} and @code{.fini}) for constructors and
+destructors.  Option @option{--disable-initfini-array} has the
+opposite effect.  If neither option is specified, the configure script
+will try to guess whether the @code{.init_array} and
+@code{.fini_array} sections are supported and, if they are, use them.
+
+@item --enable-maintainer-mode
+The build rules that
+regenerate the GCC master message catalog @file{gcc.pot} are normally
+disabled.  This is because it can only be rebuilt if the complete source
+tree is present.  If you have changed the sources and want to rebuild the
+catalog, configuring with @option{--enable-maintainer-mode} will enable
+this.  Note that you need a recent version of the @code{gettext} tools
+to do so.
+
+@item --disable-bootstrap
+For a native build, the default configuration is to perform
+a 3-stage bootstrap of the compiler when @samp{make} is invoked,
+testing that GCC can compile itself correctly.  If you want to disable
+this process, you can configure with @option{--disable-bootstrap}.
+
+@item --enable-bootstrap
+In special cases, you may want to perform a 3-stage build
+even if the target and host triplets are different.
+This could happen when the host can run code compiled for
+the target (e.g.@: host is i686-linux, target is i486-linux).
+Starting from GCC 4.2, to do this you have to configure explicitly
+with @option{--enable-bootstrap}.
+
+@item --enable-generated-files-in-srcdir
+Neither the .c and .h files that are generated from Bison and flex nor the
+info manuals and man pages that are built from the .texi files are present
+in the SVN development tree.  When building GCC from that development tree,
+or from one of our snapshots, those generated files are placed in your
+build directory, which allows for the source to be in a readonly
+directory.
+
+If you configure with @option{--enable-generated-files-in-srcdir} then those
+generated files will go into the source directory.  This is mainly intended
+for generating release or prerelease tarballs of the GCC sources, since it
+is not a requirement that the users of source releases to have flex, Bison,
+or makeinfo.
+
+@item --enable-version-specific-runtime-libs
+Specify
+that runtime libraries should be installed in the compiler specific
+subdirectory (@file{@var{libdir}/gcc}) rather than the usual places.  In
+addition, @samp{libstdc++}'s include files will be installed into
+@file{@var{libdir}} unless you overruled it by using
+@option{--with-gxx-include-dir=@var{dirname}}.  Using this option is
+particularly useful if you intend to use several versions of GCC in
+parallel.  This is currently supported by @samp{libgfortran},
+@samp{libjava}, @samp{libmudflap}, @samp{libstdc++}, and @samp{libobjc}.
+
+@item --enable-languages=@var{lang1},@var{lang2},@dots{}
+Specify that only a particular subset of compilers and
+their runtime libraries should be built.  For a list of valid values for
+@var{langN} you can issue the following command in the
+@file{gcc} directory of your GCC source tree:@*
+@smallexample
+grep language= */config-lang.in
+@end smallexample
+Currently, you can use any of the following:
+@code{all}, @code{ada}, @code{c}, @code{c++}, @code{fortran}, @code{java},
+@code{objc}, @code{obj-c++}.
+Building the Ada compiler has special requirements, see below.
+If you do not pass this flag, or specify the option @code{all}, then all
+default languages available in the @file{gcc} sub-tree will be configured.
+Ada and Objective-C++ are not default languages; the rest are.
+Re-defining @code{LANGUAGES} when calling @samp{make} @strong{does not}
+work anymore, as those language sub-directories might not have been
+configured!
+
+@item --enable-stage1-languages=@var{lang1},@var{lang2},@dots{}
+Specify that a particular subset of compilers and their runtime
+libraries should be built with the system C compiler during stage 1 of
+the bootstrap process, rather than only in later stages with the
+bootstrapped C compiler.  The list of valid values is the same as for
+@option{--enable-languages}, and the option @code{all} will select all
+of the languages enabled by @option{--enable-languages}.  This option is
+primarily useful for GCC development; for instance, when a development
+version of the compiler cannot bootstrap due to compiler bugs, or when
+one is debugging front ends other than the C front end.  When this
+option is used, one can then build the target libraries for the
+specified languages with the stage-1 compiler by using @command{make
+stage1-bubble all-target}, or run the testsuite on the stage-1 compiler
+for the specified languages using @command{make stage1-start check-gcc}.
+
+@item --disable-libada
+Specify that the run-time libraries and tools used by GNAT should not
+be built.  This can be useful for debugging, or for compatibility with
+previous Ada build procedures, when it was required to explicitly
+do a @samp{make -C gcc gnatlib_and_tools}.
+
+@item --disable-libssp
+Specify that the run-time libraries for stack smashing protection
+should not be built.
+
+@item --disable-libgomp
+Specify that the run-time libraries used by GOMP should not be built.
+
+@item --with-dwarf2
+Specify that the compiler should
+use DWARF 2 debugging information as the default.
+
+@item --enable-targets=all
+@itemx --enable-targets=@var{target_list}
+Some GCC targets, e.g.@: powerpc64-linux, build bi-arch compilers.
+These are compilers that are able to generate either 64-bit or 32-bit
+code.  Typically, the corresponding 32-bit target, e.g.@:
+powerpc-linux for powerpc64-linux, only generates 32-bit code.  This
+option enables the 32-bit target to be a bi-arch compiler, which is
+useful when you want a bi-arch compiler that defaults to 32-bit, and
+you are building a bi-arch or multi-arch binutils in a combined tree.
+Currently, this option only affects sparc-linux, powerpc-linux and
+x86-linux.
+
+@item --enable-secureplt
+This option enables @option{-msecure-plt} by default for powerpc-linux.
+@ifnothtml
+@xref{RS/6000 and PowerPC Options,, RS/6000 and PowerPC Options, gcc,
+Using the GNU Compiler Collection (GCC)},
+@end ifnothtml
+@ifhtml
+See ``RS/6000 and PowerPC Options'' in the main manual
+@end ifhtml
+
+@item --enable-cld
+This option enables @option{-mcld} by default for 32-bit x86 targets.
+@ifnothtml
+@xref{i386 and x86-64 Options,, i386 and x86-64 Options, gcc,
+Using the GNU Compiler Collection (GCC)},
+@end ifnothtml
+@ifhtml
+See ``i386 and x86-64 Options'' in the main manual
+@end ifhtml
+
+@item --enable-win32-registry
+@itemx --enable-win32-registry=@var{key}
+@itemx --disable-win32-registry
+The @option{--enable-win32-registry} option enables Microsoft Windows-hosted GCC
+to look up installations paths in the registry using the following key:
+
+@smallexample
+@code{HKEY_LOCAL_MACHINE\SOFTWARE\Free Software Foundation\@var{key}}
+@end smallexample
+
+@var{key} defaults to GCC version number, and can be overridden by the
+@option{--enable-win32-registry=@var{key}} option.  Vendors and distributors
+who use custom installers are encouraged to provide a different key,
+perhaps one comprised of vendor name and GCC version number, to
+avoid conflict with existing installations.  This feature is enabled
+by default, and can be disabled by @option{--disable-win32-registry}
+option.  This option has no effect on the other hosts.
+
+@item --nfp
+Specify that the machine does not have a floating point unit.  This
+option only applies to @samp{m68k-sun-sunos@var{n}}.  On any other
+system, @option{--nfp} has no effect.
+
+@item --enable-werror
+@itemx --disable-werror
+@itemx --enable-werror=yes
+@itemx --enable-werror=no
+When you specify this option, it controls whether certain files in the
+compiler are built with @option{-Werror} in bootstrap stage2 and later.
+If you don't specify it, @option{-Werror} is turned on for the main
+development trunk.  However it defaults to off for release branches and
+final releases.  The specific files which get @option{-Werror} are
+controlled by the Makefiles.
+
+@item --enable-checking
+@itemx --enable-checking=@var{list}
+When you specify this option, the compiler is built to perform internal
+consistency checks of the requested complexity.  This does not change the
+generated code, but adds error checking within the compiler.  This will
+slow down the compiler and may only work properly if you are building
+the compiler with GCC@.  This is @samp{yes} by default when building
+from SVN or snapshots, but @samp{release} for releases.  The default
+for building the stage1 compiler is @samp{yes}.  More control
+over the checks may be had by specifying @var{list}.  The categories of
+checks available are @samp{yes} (most common checks
+@samp{assert,misc,tree,gc,rtlflag,runtime}), @samp{no} (no checks at
+all), @samp{all} (all but @samp{valgrind}), @samp{release} (cheapest
+checks @samp{assert,runtime}) or @samp{none} (same as @samp{no}).
+Individual checks can be enabled with these flags @samp{assert},
+@samp{df}, @samp{fold}, @samp{gc}, @samp{gcac} @samp{misc}, @samp{rtl},
+@samp{rtlflag}, @samp{runtime}, @samp{tree}, and @samp{valgrind}.
+
+The @samp{valgrind} check requires the external @command{valgrind}
+simulator, available from @uref{http://valgrind.org/}.  The
+@samp{df}, @samp{rtl}, @samp{gcac} and @samp{valgrind} checks are very expensive.
+To disable all checking, @samp{--disable-checking} or
+@samp{--enable-checking=none} must be explicitly requested.  Disabling
+assertions will make the compiler and runtime slightly faster but
+increase the risk of undetected internal errors causing wrong code to be
+generated.
+
+@item --disable-stage1-checking
+@item --enable-stage1-checking
+@itemx --enable-stage1-checking=@var{list}
+If no @option{--enable-checking} option is specified the stage1
+compiler will be built with @samp{yes} checking enabled, otherwise
+the stage1 checking flags are the same as specified by
+@option{--enable-checking}.  To build the stage1 compiler with
+different checking options use @option{--enable-stage1-checking}.
+The list of checking options is the same as for @option{--enable-checking}.
+If your system is too slow or too small to bootstrap a released compiler
+with checking for stage1 enabled, you can use @samp{--disable-stage1-checking}
+to disable checking for the stage1 compiler.
+
+@item --enable-coverage
+@itemx --enable-coverage=@var{level}
+With this option, the compiler is built to collect self coverage
+information, every time it is run.  This is for internal development
+purposes, and only works when the compiler is being built with gcc.  The
+@var{level} argument controls whether the compiler is built optimized or
+not, values are @samp{opt} and @samp{noopt}.  For coverage analysis you
+want to disable optimization, for performance analysis you want to
+enable optimization.  When coverage is enabled, the default level is
+without optimization.
+
+@item --enable-gather-detailed-mem-stats
+When this option is specified more detailed information on memory
+allocation is gathered.  This information is printed when using
+@option{-fmem-report}.
+
+@item --with-gc
+@itemx --with-gc=@var{choice}
+With this option you can specify the garbage collector implementation
+used during the compilation process.  @var{choice} can be one of
+@samp{page} and @samp{zone}, where @samp{page} is the default.
+
+@item --enable-nls
+@itemx --disable-nls
+The @option{--enable-nls} option enables Native Language Support (NLS),
+which lets GCC output diagnostics in languages other than American
+English.  Native Language Support is enabled by default if not doing a
+canadian cross build.  The @option{--disable-nls} option disables NLS@.
+
+@item --with-included-gettext
+If NLS is enabled, the @option{--with-included-gettext} option causes the build
+procedure to prefer its copy of GNU @command{gettext}.
+
+@item --with-catgets
+If NLS is enabled, and if the host lacks @code{gettext} but has the
+inferior @code{catgets} interface, the GCC build procedure normally
+ignores @code{catgets} and instead uses GCC's copy of the GNU
+@code{gettext} library.  The @option{--with-catgets} option causes the
+build procedure to use the host's @code{catgets} in this situation.
+
+@item --with-libiconv-prefix=@var{dir}
+Search for libiconv header files in @file{@var{dir}/include} and
+libiconv library files in @file{@var{dir}/lib}.
+
+@item --enable-obsolete
+Enable configuration for an obsoleted system.  If you attempt to
+configure GCC for a system (build, host, or target) which has been
+obsoleted, and you do not specify this flag, configure will halt with an
+error message.
+
+All support for systems which have been obsoleted in one release of GCC
+is removed entirely in the next major release, unless someone steps
+forward to maintain the port.
+
+@item --enable-decimal-float
+@itemx --enable-decimal-float=yes
+@itemx --enable-decimal-float=no
+@itemx --enable-decimal-float=bid
+@itemx --enable-decimal-float=dpd
+@itemx --disable-decimal-float
+Enable (or disable) support for the C decimal floating point extension
+that is in the IEEE 754-2008 standard.  This is enabled by default only
+on PowerPC, i386, and x86_64 GNU/Linux systems.  Other systems may also
+support it, but require the user to specifically enable it.  You can
+optionally control which decimal floating point format is used (either
+@samp{bid} or @samp{dpd}).  The @samp{bid} (binary integer decimal)
+format is default on i386 and x86_64 systems, and the @samp{dpd}
+(densely packed decimal) format is default on PowerPC systems.
+
+@item --enable-fixed-point
+@itemx --disable-fixed-point
+Enable (or disable) support for C fixed-point arithmetic.
+This option is enabled by default for some targets (such as MIPS) which
+have hardware-support for fixed-point operations.  On other targets, you
+may enable this option manually.
+
+@item --with-long-double-128
+Specify if @code{long double} type should be 128-bit by default on selected
+GNU/Linux architectures.  If using @code{--without-long-double-128},
+@code{long double} will be by default 64-bit, the same as @code{double} type.
+When neither of these configure options are used, the default will be
+128-bit @code{long double} when built against GNU C Library 2.4 and later,
+64-bit @code{long double} otherwise.
+
+@item --with-gmp=@var{pathname}
+@itemx --with-gmp-include=@var{pathname}
+@itemx --with-gmp-lib=@var{pathname}
+@itemx --with-mpfr=@var{pathname}
+@itemx --with-mpfr-include=@var{pathname}
+@itemx --with-mpfr-lib=@var{pathname}
+If you do not have GMP (the GNU Multiple Precision library) and the
+MPFR Libraries installed in a standard location and you want to build
+GCC, you can explicitly specify the directory where they are installed
+(@samp{--with-gmp=@var{gmpinstalldir}},
+@samp{--with-mpfr=@var{mpfrinstalldir}}).  The
+@option{--with-gmp=@var{gmpinstalldir}} option is shorthand for
+@option{--with-gmp-lib=@var{gmpinstalldir}/lib} and
+@option{--with-gmp-include=@var{gmpinstalldir}/include}.  Likewise the
+@option{--with-mpfr=@var{mpfrinstalldir}} option is shorthand for
+@option{--with-mpfr-lib=@var{mpfrinstalldir}/lib} and
+@option{--with-mpfr-include=@var{mpfrinstalldir}/include}.  If these
+shorthand assumptions are not correct, you can use the explicit
+include and lib options directly.
+
+@item --with-ppl=@var{pathname}
+@itemx --with-ppl-include=@var{pathname}
+@itemx --with-ppl-lib=@var{pathname}
+@itemx --with-cloog=@var{pathname}
+@itemx --with-cloog-include=@var{pathname}
+@itemx --with-cloog-lib=@var{pathname}
+If you do not have PPL (the Parma Polyhedra Library) and the CLooG
+libraries installed in a standard location and you want to build GCC,
+you can explicitly specify the directory where they are installed
+(@samp{--with-ppl=@var{pplinstalldir}},
+@samp{--with-cloog=@var{clooginstalldir}}). The
+@option{--with-ppl=@var{pplinstalldir}} option is shorthand for
+@option{--with-ppl-lib=@var{pplinstalldir}/lib} and
+@option{--with-ppl-include=@var{pplinstalldir}/include}.  Likewise the
+@option{--with-cloog=@var{clooginstalldir}} option is shorthand for
+@option{--with-cloog-lib=@var{clooginstalldir}/lib} and
+@option{--with-cloog-include=@var{clooginstalldir}/include}.  If these
+shorthand assumptions are not correct, you can use the explicit
+include and lib options directly.
+
+@item --with-host-libstdcxx=@var{linker-args}
+If you are linking with a static copy of PPL, you can use this option
+to specify how the linker should find the standard C++ library used
+internally by PPL.  Typical values of @var{linker-args} might be
+@samp{-lstdc++} or @samp{-Wl,-Bstatic,-lstdc++,-Bdynamic -lm}.  If you are
+linking with a shared copy of PPL, you probably do not need this
+option; shared library dependencies will cause the linker to search
+for the standard C++ library automatically.
+
+@item --with-debug-prefix-map=@var{map}
+Convert source directory names using @option{-fdebug-prefix-map} when
+building runtime libraries.  @samp{@var{map}} is a space-separated
+list of maps of the form @samp{@var{old}=@var{new}}.
+
+@end table
+
+@subheading Cross-Compiler-Specific Options
+The following options only apply to building cross compilers.
+@table @code
+@item --with-sysroot
+@itemx --with-sysroot=@var{dir}
+Tells GCC to consider @var{dir} as the root of a tree that contains a
+(subset of) the root filesystem of the target operating system.
+Target system headers, libraries and run-time object files will be
+searched in there.  The specified directory is not copied into the
+install tree, unlike the options @option{--with-headers} and
+@option{--with-libs} that this option obsoletes.  The default value,
+in case @option{--with-sysroot} is not given an argument, is
+@option{$@{gcc_tooldir@}/sys-root}.  If the specified directory is a
+subdirectory of @option{$@{exec_prefix@}}, then it will be found relative to
+the GCC binaries if the installation tree is moved.
+
+@item --with-build-sysroot
+@itemx --with-build-sysroot=@var{dir}
+Tells GCC to consider @var{dir} as the system root (see
+@option{--with-sysroot}) while building target libraries, instead of
+the directory specified with @option{--with-sysroot}.  This option is
+only useful when you are already using @option{--with-sysroot}.  You
+can use @option{--with-build-sysroot} when you are configuring with
+@option{--prefix} set to a directory that is different from the one in
+which you are installing GCC and your target libraries.  
+
+This option affects the system root for the compiler used to build
+target libraries (which runs on the build system); it does not affect
+the compiler which is used to build GCC itself.
+
+@item --with-headers
+@itemx --with-headers=@var{dir}
+Deprecated in favor of @option{--with-sysroot}.
+Specifies that target headers are available when building a cross compiler.
+The @var{dir} argument specifies a directory which has the target include
+files.  These include files will be copied into the @file{gcc} install
+directory.  @emph{This option with the @var{dir} argument is required} when
+building a cross compiler, if @file{@var{prefix}/@var{target}/sys-include}
+doesn't pre-exist.  If @file{@var{prefix}/@var{target}/sys-include} does
+pre-exist, the @var{dir} argument may be omitted.  @command{fixincludes}
+will be run on these files to make them compatible with GCC@.
+
+@item --without-headers
+Tells GCC not use any target headers from a libc when building a cross
+compiler.  When crossing to GNU/Linux, you need the headers so GCC
+can build the exception handling for libgcc.
+
+@item --with-libs
+@itemx --with-libs=``@var{dir1} @var{dir2} @dots{} @var{dirN}''
+Deprecated in favor of @option{--with-sysroot}.
+Specifies a list of directories which contain the target runtime
+libraries.  These libraries will be copied into the @file{gcc} install
+directory.  If the directory list is omitted, this option has no
+effect.
+
+@item --with-newlib
+Specifies that @samp{newlib} is
+being used as the target C library.  This causes @code{__eprintf} to be
+omitted from @file{libgcc.a} on the assumption that it will be provided by
+@samp{newlib}.
+
+@item --with-build-time-tools=@var{dir}
+Specifies where to find the set of target tools (assembler, linker, etc.)
+that will be used while building GCC itself.  This option can be useful
+if the directory layouts are different between the system you are building
+GCC on, and the system where you will deploy it.
+
+For example, on a @option{ia64-hp-hpux} system, you may have the GNU
+assembler and linker in @file{/usr/bin}, and the native tools in a
+different path, and build a toolchain that expects to find the
+native tools in @file{/usr/bin}.
+
+When you use this option, you should ensure that @var{dir} includes
+@command{ar}, @command{as}, @command{ld}, @command{nm},
+@command{ranlib} and @command{strip} if necessary, and possibly
+@command{objdump}.  Otherwise, GCC may use an inconsistent set of
+tools.
+@end table
+
+@subheading Java-Specific Options
+
+The following option applies to the build of the Java front end.
+
+@table @code
+@item --disable-libgcj
+Specify that the run-time libraries
+used by GCJ should not be built.  This is useful in case you intend
+to use GCJ with some other run-time, or you're going to install it
+separately, or it just happens not to build on your particular
+machine.  In general, if the Java front end is enabled, the GCJ
+libraries will be enabled too, unless they're known to not work on
+the target platform.  If GCJ is enabled but @samp{libgcj} isn't built, you
+may need to port it; in this case, before modifying the top-level
+@file{configure.in} so that @samp{libgcj} is enabled by default on this platform,
+you may use @option{--enable-libgcj} to override the default.
+
+@end table
+
+The following options apply to building @samp{libgcj}.
+
+@subsubheading General Options
+
+@table @code
+@item --enable-java-maintainer-mode
+By default the @samp{libjava} build will not attempt to compile the
+@file{.java} source files to @file{.class}.  Instead, it will use the
+@file{.class} files from the source tree.  If you use this option you
+must have executables named @command{ecj1} and @command{gjavah} in your path
+for use by the build.  You must use this option if you intend to
+modify any @file{.java} files in @file{libjava}.
+
+@item --with-java-home=@var{dirname}
+This @samp{libjava} option overrides the default value of the
+@samp{java.home} system property.  It is also used to set
+@samp{sun.boot.class.path} to @file{@var{dirname}/lib/rt.jar}.  By
+default @samp{java.home} is set to @file{@var{prefix}} and
+@samp{sun.boot.class.path} to
+@file{@var{datadir}/java/libgcj-@var{version}.jar}.
+
+@item --with-ecj-jar=@var{filename}
+This option can be used to specify the location of an external jar
+file containing the Eclipse Java compiler.  A specially modified
+version of this compiler is used by @command{gcj} to parse
+@file{.java} source files.  If this option is given, the
+@samp{libjava} build will create and install an @file{ecj1} executable
+which uses this jar file at runtime.
+
+If this option is not given, but an @file{ecj.jar} file is found in
+the topmost source tree at configure time, then the @samp{libgcj}
+build will create and install @file{ecj1}, and will also install the
+discovered @file{ecj.jar} into a suitable place in the install tree.
+
+If @file{ecj1} is not installed, then the user will have to supply one
+on his path in order for @command{gcj} to properly parse @file{.java}
+source files.  A suitable jar is available from
+@uref{ftp://sourceware.org/pub/java/}.
+
+@item --disable-getenv-properties
+Don't set system properties from @env{GCJ_PROPERTIES}.
+
+@item --enable-hash-synchronization
+Use a global hash table for monitor locks.  Ordinarily,
+@samp{libgcj}'s @samp{configure} script automatically makes
+the correct choice for this option for your platform.  Only use
+this if you know you need the library to be configured differently.
+
+@item --enable-interpreter
+Enable the Java interpreter.  The interpreter is automatically
+enabled by default on all platforms that support it.  This option
+is really only useful if you want to disable the interpreter
+(using @option{--disable-interpreter}).
+
+@item --disable-java-net
+Disable java.net.  This disables the native part of java.net only,
+using non-functional stubs for native method implementations.
+
+@item --disable-jvmpi
+Disable JVMPI support.
+
+@item --disable-libgcj-bc
+Disable BC ABI compilation of certain parts of libgcj.  By default,
+some portions of libgcj are compiled with @option{-findirect-dispatch}
+and @option{-fno-indirect-classes}, allowing them to be overridden at
+run-time.
+
+If @option{--disable-libgcj-bc} is specified, libgcj is built without
+these options.  This allows the compile-time linker to resolve
+dependencies when statically linking to libgcj.  However it makes it
+impossible to override the affected portions of libgcj at run-time.
+
+@item --enable-reduced-reflection
+Build most of libgcj with @option{-freduced-reflection}.  This reduces
+the size of libgcj at the expense of not being able to do accurate
+reflection on the classes it contains.  This option is safe if you
+know that code using libgcj will never use reflection on the standard
+runtime classes in libgcj (including using serialization, RMI or CORBA).
+
+@item --with-ecos
+Enable runtime eCos target support.
+
+@item --without-libffi
+Don't use @samp{libffi}.  This will disable the interpreter and JNI
+support as well, as these require @samp{libffi} to work.
+
+@item --enable-libgcj-debug
+Enable runtime debugging code.
+
+@item --enable-libgcj-multifile
+If specified, causes all @file{.java} source files to be
+compiled into @file{.class} files in one invocation of
+@samp{gcj}.  This can speed up build time, but is more
+resource-intensive.  If this option is unspecified or
+disabled, @samp{gcj} is invoked once for each @file{.java}
+file to compile into a @file{.class} file.
+
+@item --with-libiconv-prefix=DIR
+Search for libiconv in @file{DIR/include} and @file{DIR/lib}.
+
+@item --enable-sjlj-exceptions
+Force use of the @code{setjmp}/@code{longjmp}-based scheme for exceptions.
+@samp{configure} ordinarily picks the correct value based on the platform.
+Only use this option if you are sure you need a different setting.
+
+@item --with-system-zlib
+Use installed @samp{zlib} rather than that included with GCC@.
+
+@item --with-win32-nlsapi=ansi, unicows or unicode
+Indicates how MinGW @samp{libgcj} translates between UNICODE
+characters and the Win32 API@.
+
+@item --enable-java-home
+If enabled, this creates a JPackage compatible SDK environment during install.
+Note that if --enable-java-home is used, --with-arch-directory=ARCH must also
+be specified.
+
+@item --with-arch-directory=ARCH
+Specifies the name to use for the @file{jre/lib/ARCH} directory in the SDK 
+environment created when --enable-java-home is passed. Typical names for this 
+directory include i386, amd64, ia64, etc.
+
+@item --with-os-directory=DIR
+Specifies the OS directory for the SDK include directory. This is set to auto
+detect, and is typically 'linux'.
+
+@item --with-origin-name=NAME
+Specifies the JPackage origin name. This defaults to the 'gcj' in
+java-1.5.0-gcj.
+
+@item --with-arch-suffix=SUFFIX
+Specifies the suffix for the sdk directory. Defaults to the empty string. 
+Examples include '.x86_64' in 'java-1.5.0-gcj-1.5.0.0.x86_64'.
+
+@item --with-jvm-root-dir=DIR
+Specifies where to install the SDK. Default is $(prefix)/lib/jvm.
+
+@item --with-jvm-jar-dir=DIR
+Specifies where to install jars. Default is $(prefix)/lib/jvm-exports.
+
+@item --with-python-dir=DIR
+Specifies where to install the Python modules used for aot-compile. DIR should
+not include the prefix used in installation. For example, if the Python modules
+are to be installed in /usr/lib/python2.5/site-packages, then 
+--with-python-dir=/lib/python2.5/site-packages should be passed. If this is
+not specified, then the Python modules are installed in $(prefix)/share/python.
+
+@item --enable-aot-compile-rpm
+Adds aot-compile-rpm to the list of installed scripts.
+
+@table @code
+@item ansi
+Use the single-byte @code{char} and the Win32 A functions natively,
+translating to and from UNICODE when using these functions.  If
+unspecified, this is the default.
+
+@item unicows
+Use the @code{WCHAR} and Win32 W functions natively.  Adds
+@code{-lunicows} to @file{libgcj.spec} to link with @samp{libunicows}.
+@file{unicows.dll} needs to be deployed on Microsoft Windows 9X machines
+running built executables.  @file{libunicows.a}, an open-source
+import library around Microsoft's @code{unicows.dll}, is obtained from
+@uref{http://libunicows.sourceforge.net/}, which also gives details
+on getting @file{unicows.dll} from Microsoft.
+
+@item unicode
+Use the @code{WCHAR} and Win32 W functions natively.  Does @emph{not}
+add @code{-lunicows} to @file{libgcj.spec}.  The built executables will
+only run on Microsoft Windows NT and above.
+@end table
+@end table
+
+@subsubheading AWT-Specific Options
+
+@table @code
+@item --with-x
+Use the X Window System.
+
+@item --enable-java-awt=PEER(S)
+Specifies the AWT peer library or libraries to build alongside
+@samp{libgcj}.  If this option is unspecified or disabled, AWT
+will be non-functional.  Current valid values are @option{gtk} and
+@option{xlib}.  Multiple libraries should be separated by a
+comma (i.e.@: @option{--enable-java-awt=gtk,xlib}).
+
+@item --enable-gtk-cairo
+Build the cairo Graphics2D implementation on GTK@.
+
+@item --enable-java-gc=TYPE
+Choose garbage collector.  Defaults to @option{boehm} if unspecified.
+
+@item --disable-gtktest
+Do not try to compile and run a test GTK+ program.
+
+@item --disable-glibtest
+Do not try to compile and run a test GLIB program.
+
+@item --with-libart-prefix=PFX
+Prefix where libart is installed (optional).
+
+@item --with-libart-exec-prefix=PFX
+Exec prefix where libart is installed (optional).
+
+@item --disable-libarttest
+Do not try to compile and run a test libart program.
+
+@end table
+
+@html
+<hr />
+<p>
+@end html
+@ifhtml
+@uref{./index.html,,Return to the GCC Installation page}
+@end ifhtml
+@end ifset
+
+@c ***Building****************************************************************
+@ifnothtml
+@comment node-name,     next,          previous, up
+@node    Building, Testing, Configuration, Installing GCC
+@end ifnothtml
+@ifset buildhtml
+@ifnothtml
+@chapter Building
+@end ifnothtml
+@cindex Installing GCC: Building
+
+Now that GCC is configured, you are ready to build the compiler and
+runtime libraries.
+
+Some commands executed when making the compiler may fail (return a
+nonzero status) and be ignored by @command{make}.  These failures, which
+are often due to files that were not found, are expected, and can safely
+be ignored.
+
+It is normal to have compiler warnings when compiling certain files.
+Unless you are a GCC developer, you can generally ignore these warnings
+unless they cause compilation to fail.  Developers should attempt to fix
+any warnings encountered, however they can temporarily continue past
+warnings-as-errors by specifying the configure flag
+@option{--disable-werror}.
+
+On certain old systems, defining certain environment variables such as
+@env{CC} can interfere with the functioning of @command{make}.
+
+If you encounter seemingly strange errors when trying to build the
+compiler in a directory other than the source directory, it could be
+because you have previously configured the compiler in the source
+directory.  Make sure you have done all the necessary preparations.
+
+If you build GCC on a BSD system using a directory stored in an old System
+V file system, problems may occur in running @command{fixincludes} if the
+System V file system doesn't support symbolic links.  These problems
+result in a failure to fix the declaration of @code{size_t} in
+@file{sys/types.h}.  If you find that @code{size_t} is a signed type and
+that type mismatches occur, this could be the cause.
+
+The solution is not to use such a directory for building GCC@.
+
+Similarly, when building from SVN or snapshots, or if you modify
+@file{*.l} files, you need the Flex lexical analyzer generator
+installed.  If you do not modify @file{*.l} files, releases contain
+the Flex-generated files and you do not need Flex installed to build
+them.  There is still one Flex-based lexical analyzer (part of the
+build machinery, not of GCC itself) that is used even if you only
+build the C front end.
+
+When building from SVN or snapshots, or if you modify Texinfo
+documentation, you need version 4.7 or later of Texinfo installed if you
+want Info documentation to be regenerated.  Releases contain Info
+documentation pre-built for the unmodified documentation in the release.
+
+@section Building a native compiler
+
+For a native build, the default configuration is to perform
+a 3-stage bootstrap of the compiler when @samp{make} is invoked.
+This will build the entire GCC system and ensure that it compiles
+itself correctly.  It can be disabled with the @option{--disable-bootstrap}
+parameter to @samp{configure}, but bootstrapping is suggested because
+the compiler will be tested more completely and could also have
+better performance.
+
+The bootstrapping process will complete the following steps:
+
+@itemize @bullet
+@item
+Build tools necessary to build the compiler.
+
+@item
+Perform a 3-stage bootstrap of the compiler.  This includes building
+three times the target tools for use by the compiler such as binutils
+(bfd, binutils, gas, gprof, ld, and opcodes) if they have been
+individually linked or moved into the top level GCC source tree before
+configuring.
+
+@item
+Perform a comparison test of the stage2 and stage3 compilers.
+
+@item
+Build runtime libraries using the stage3 compiler from the previous step.
+
+@end itemize
+
+If you are short on disk space you might consider @samp{make
+bootstrap-lean} instead.  The sequence of compilation is the
+same described above, but object files from the stage1 and
+stage2 of the 3-stage bootstrap of the compiler are deleted as
+soon as they are no longer needed.
+
+If you wish to use non-default GCC flags when compiling the stage2
+and stage3 compilers, set @code{BOOT_CFLAGS} on the command line when
+doing @samp{make}.  For example, if you want to save additional space
+during the bootstrap and in the final installation as well, you can
+build the compiler binaries without debugging information as in the
+following example.  This will save roughly 40% of disk space both for
+the bootstrap and the final installation.  (Libraries will still contain
+debugging information.)
+
+@smallexample
+     make BOOT_CFLAGS='-O' bootstrap
+@end smallexample
+
+You can place non-default optimization flags into @code{BOOT_CFLAGS}; they
+are less well tested here than the default of @samp{-g -O2}, but should
+still work.  In a few cases, you may find that you need to specify special
+flags such as @option{-msoft-float} here to complete the bootstrap; or,
+if the native compiler miscompiles the stage1 compiler, you may need
+to work around this, by choosing @code{BOOT_CFLAGS} to avoid the parts
+of the stage1 compiler that were miscompiled, or by using @samp{make
+bootstrap4} to increase the number of stages of bootstrap.
+
+@code{BOOT_CFLAGS} does not apply to bootstrapped target libraries.
+Since these are always compiled with the compiler currently being
+bootstrapped, you can use @code{CFLAGS_FOR_TARGET} to modify their
+compilation flags, as for non-bootstrapped target libraries.
+Again, if the native compiler miscompiles the stage1 compiler, you may
+need to work around this by avoiding non-working parts of the stage1
+compiler.  Use @code{STAGE1_LIBCFLAGS} to this end.
+
+If you used the flag @option{--enable-languages=@dots{}} to restrict
+the compilers to be built, only those you've actually enabled will be
+built.  This will of course only build those runtime libraries, for
+which the particular compiler has been built.  Please note,
+that re-defining @env{LANGUAGES} when calling @samp{make}
+@strong{does not} work anymore!
+
+If the comparison of stage2 and stage3 fails, this normally indicates
+that the stage2 compiler has compiled GCC incorrectly, and is therefore
+a potentially serious bug which you should investigate and report.  (On
+a few systems, meaningful comparison of object files is impossible; they
+always appear ``different''.  If you encounter this problem, you will
+need to disable comparison in the @file{Makefile}.)
+
+If you do not want to bootstrap your compiler, you can configure with
+@option{--disable-bootstrap}.  In particular cases, you may want to
+bootstrap your compiler even if the target system is not the same as
+the one you are building on: for example, you could build a
+@code{powerpc-unknown-linux-gnu} toolchain on a
+@code{powerpc64-unknown-linux-gnu} host.  In this case, pass
+@option{--enable-bootstrap} to the configure script.
+
+
+@section Building a cross compiler
+
+When building a cross compiler, it is not generally possible to do a
+3-stage bootstrap of the compiler.  This makes for an interesting problem
+as parts of GCC can only be built with GCC@.
+
+To build a cross compiler, we first recommend building and installing a
+native compiler.  You can then use the native GCC compiler to build the
+cross compiler.  The installed native compiler needs to be GCC version
+2.95 or later.
+
+If the cross compiler is to be built with support for the Java
+programming language and the ability to compile .java source files is
+desired, the installed native compiler used to build the cross
+compiler needs to be the same GCC version as the cross compiler.  In
+addition the cross compiler needs to be configured with
+@option{--with-ecj-jar=@dots{}}.
+
+Assuming you have already installed a native copy of GCC and configured
+your cross compiler, issue the command @command{make}, which performs the
+following steps:
+
+@itemize @bullet
+@item
+Build host tools necessary to build the compiler.
+
+@item
+Build target tools for use by the compiler such as binutils (bfd,
+binutils, gas, gprof, ld, and opcodes)
+if they have been individually linked or moved into the top level GCC source
+tree before configuring.
+
+@item
+Build the compiler (single stage only).
+
+@item
+Build runtime libraries using the compiler from the previous step.
+@end itemize
+
+Note that if an error occurs in any step the make process will exit.
+
+If you are not building GNU binutils in the same source tree as GCC,
+you will need a cross-assembler and cross-linker installed before
+configuring GCC@.  Put them in the directory
+@file{@var{prefix}/@var{target}/bin}.  Here is a table of the tools
+you should put in this directory:
+
+@table @file
+@item as
+This should be the cross-assembler.
+
+@item ld
+This should be the cross-linker.
+
+@item ar
+This should be the cross-archiver: a program which can manipulate
+archive files (linker libraries) in the target machine's format.
+
+@item ranlib
+This should be a program to construct a symbol table in an archive file.
+@end table
+
+The installation of GCC will find these programs in that directory,
+and copy or link them to the proper place to for the cross-compiler to
+find them when run later.
+
+The easiest way to provide these files is to build the Binutils package.
+Configure it with the same @option{--host} and @option{--target}
+options that you use for configuring GCC, then build and install
+them.  They install their executables automatically into the proper
+directory.  Alas, they do not support all the targets that GCC
+supports.
+
+If you are not building a C library in the same source tree as GCC,
+you should also provide the target libraries and headers before
+configuring GCC, specifying the directories with
+@option{--with-sysroot} or @option{--with-headers} and
+@option{--with-libs}.  Many targets also require ``start files'' such
+as @file{crt0.o} and
+@file{crtn.o} which are linked into each executable.  There may be several
+alternatives for @file{crt0.o}, for use with profiling or other
+compilation options.  Check your target's definition of
+@code{STARTFILE_SPEC} to find out what start files it uses.
+
+@section Building in parallel
+
+GNU Make 3.79 and above, which is necessary to build GCC, support
+building in parallel.  To activate this, you can use @samp{make -j 2}
+instead of @samp{make}.  You can also specify a bigger number, and 
+in most cases using a value greater than the number of processors in
+your machine will result in fewer and shorter I/O latency hits, thus
+improving overall throughput; this is especially true for slow drives
+and network filesystems.
+
+@section Building the Ada compiler
+
+In order to build GNAT, the Ada compiler, you need a working GNAT
+compiler (GCC version 3.4 or later).
+This includes GNAT tools such as @command{gnatmake} and
+@command{gnatlink}, since the Ada front end is written in Ada and
+uses some GNAT-specific extensions.
+
+In order to build a cross compiler, it is suggested to install
+the new compiler as native first, and then use it to build the cross
+compiler.
+
+@command{configure} does not test whether the GNAT installation works
+and has a sufficiently recent version; if too old a GNAT version is
+installed, the build will fail unless @option{--enable-languages} is
+used to disable building the Ada front end.
+
+@env{ADA_INCLUDE_PATH} and @env{ADA_OBJECT_PATH} environment variables
+must not be set when building the Ada compiler, the Ada tools, or the
+Ada runtime libraries. You can check that your build environment is clean
+by verifying that @samp{gnatls -v} lists only one explicit path in each
+section.
+
+@section Building with profile feedback
+
+It is possible to use profile feedback to optimize the compiler itself.  This
+should result in a faster compiler binary.  Experiments done on x86 using gcc
+3.3 showed approximately 7 percent speedup on compiling C programs.  To
+bootstrap the compiler with profile feedback, use @code{make profiledbootstrap}.
+
+When @samp{make profiledbootstrap} is run, it will first build a @code{stage1}
+compiler.  This compiler is used to build a @code{stageprofile} compiler
+instrumented to collect execution counts of instruction and branch
+probabilities.  Then runtime libraries are compiled with profile collected.
+Finally a @code{stagefeedback} compiler is built using the information collected.
+
+Unlike standard bootstrap, several additional restrictions apply.  The
+compiler used to build @code{stage1} needs to support a 64-bit integral type.
+It is recommended to only use GCC for this.  Also parallel make is currently
+not supported since collisions in profile collecting may occur.
+
+@html
+<hr />
+<p>
+@end html
+@ifhtml
+@uref{./index.html,,Return to the GCC Installation page}
+@end ifhtml
+@end ifset
+
+@c ***Testing*****************************************************************
+@ifnothtml
+@comment node-name,     next,          previous, up
+@node    Testing, Final install, Building, Installing GCC
+@end ifnothtml
+@ifset testhtml
+@ifnothtml
+@chapter Installing GCC: Testing
+@end ifnothtml
+@cindex Testing
+@cindex Installing GCC: Testing
+@cindex Testsuite
+
+Before you install GCC, we encourage you to run the testsuites and to
+compare your results with results from a similar configuration that have
+been submitted to the
+@uref{http://gcc.gnu.org/ml/gcc-testresults/,,gcc-testresults mailing list}.
+Some of these archived results are linked from the build status lists
+at @uref{http://gcc.gnu.org/buildstat.html}, although not everyone who
+reports a successful build runs the testsuites and submits the results.
+This step is optional and may require you to download additional software,
+but it can give you confidence in your new GCC installation or point out
+problems before you install and start using your new GCC@.
+
+First, you must have @uref{download.html,,downloaded the testsuites}.
+These are part of the full distribution, but if you downloaded the
+``core'' compiler plus any front ends, you must download the testsuites
+separately.
+
+Second, you must have the testing tools installed.  This includes
+@uref{http://www.gnu.org/software/dejagnu/,,DejaGnu}, Tcl, and Expect;
+the DejaGnu site has links to these.
+
+If the directories where @command{runtest} and @command{expect} were
+installed are not in the @env{PATH}, you may need to set the following
+environment variables appropriately, as in the following example (which
+assumes that DejaGnu has been installed under @file{/usr/local}):
+
+@smallexample
+     TCL_LIBRARY = /usr/local/share/tcl8.0
+     DEJAGNULIBS = /usr/local/share/dejagnu
+@end smallexample
+
+(On systems such as Cygwin, these paths are required to be actual
+paths, not mounts or links; presumably this is due to some lack of
+portability in the DejaGnu code.)
+
+
+Finally, you can run the testsuite (which may take a long time):
+@smallexample
+     cd @var{objdir}; make -k check
+@end smallexample
+
+This will test various components of GCC, such as compiler
+front ends and runtime libraries.  While running the testsuite, DejaGnu
+might emit some harmless messages resembling
+@samp{WARNING: Couldn't find the global config file.} or
+@samp{WARNING: Couldn't find tool init file} that can be ignored.
+
+If you are testing a cross-compiler, you may want to run the testsuite
+on a simulator as described at @uref{http://gcc.gnu.org/simtest-howto.html}.
+
+@section How can you run the testsuite on selected tests?
+
+In order to run sets of tests selectively, there are targets
+@samp{make check-gcc} and @samp{make check-g++}
+in the @file{gcc} subdirectory of the object directory.  You can also
+just run @samp{make check} in a subdirectory of the object directory.
+
+
+A more selective way to just run all @command{gcc} execute tests in the
+testsuite is to use
+
+@smallexample
+    make check-gcc RUNTESTFLAGS="execute.exp @var{other-options}"
+@end smallexample
+
+Likewise, in order to run only the @command{g++} ``old-deja'' tests in
+the testsuite with filenames matching @samp{9805*}, you would use
+
+@smallexample
+    make check-g++ RUNTESTFLAGS="old-deja.exp=9805* @var{other-options}"
+@end smallexample
+
+The @file{*.exp} files are located in the testsuite directories of the GCC
+source, the most important ones being @file{compile.exp},
+@file{execute.exp}, @file{dg.exp} and @file{old-deja.exp}.
+To get a list of the possible @file{*.exp} files, pipe the
+output of @samp{make check} into a file and look at the
+@samp{Running @dots{}  .exp} lines.
+
+@section Passing options and running multiple testsuites
+
+You can pass multiple options to the testsuite using the
+@samp{--target_board} option of DejaGNU, either passed as part of
+@samp{RUNTESTFLAGS}, or directly to @command{runtest} if you prefer to
+work outside the makefiles.  For example,
+
+@smallexample
+    make check-g++ RUNTESTFLAGS="--target_board=unix/-O3/-fmerge-constants"
+@end smallexample
+
+will run the standard @command{g++} testsuites (``unix'' is the target name
+for a standard native testsuite situation), passing
+@samp{-O3 -fmerge-constants} to the compiler on every test, i.e.,
+slashes separate options.
+
+You can run the testsuites multiple times using combinations of options
+with a syntax similar to the brace expansion of popular shells:
+
+@smallexample
+    @dots{}"--target_board=arm-sim\@{-mhard-float,-msoft-float\@}\@{-O1,-O2,-O3,\@}"
+@end smallexample
+
+(Note the empty option caused by the trailing comma in the final group.)
+The following will run each testsuite eight times using the @samp{arm-sim}
+target, as if you had specified all possible combinations yourself:
+
+@smallexample
+    --target_board=arm-sim/-mhard-float/-O1
+    --target_board=arm-sim/-mhard-float/-O2
+    --target_board=arm-sim/-mhard-float/-O3
+    --target_board=arm-sim/-mhard-float
+    --target_board=arm-sim/-msoft-float/-O1
+    --target_board=arm-sim/-msoft-float/-O2
+    --target_board=arm-sim/-msoft-float/-O3
+    --target_board=arm-sim/-msoft-float
+@end smallexample
+
+They can be combined as many times as you wish, in arbitrary ways.  This
+list:
+
+@smallexample
+    @dots{}"--target_board=unix/-Wextra\@{-O3,-fno-strength\@}\@{-fomit-frame,\@}"
+@end smallexample
+
+will generate four combinations, all involving @samp{-Wextra}.
+
+The disadvantage to this method is that the testsuites are run in serial,
+which is a waste on multiprocessor systems.  For users with GNU Make and
+a shell which performs brace expansion, you can run the testsuites in
+parallel by having the shell perform the combinations and @command{make}
+do the parallel runs.  Instead of using @samp{--target_board}, use a
+special makefile target:
+
+@smallexample
+    make -j@var{N} check-@var{testsuite}//@var{test-target}/@var{option1}/@var{option2}/@dots{}
+@end smallexample
+
+For example,
+
+@smallexample
+    make -j3 check-gcc//sh-hms-sim/@{-m1,-m2,-m3,-m3e,-m4@}/@{,-nofpu@}
+@end smallexample
+
+will run three concurrent ``make-gcc'' testsuites, eventually testing all
+ten combinations as described above.  Note that this is currently only
+supported in the @file{gcc} subdirectory.  (To see how this works, try
+typing @command{echo} before the example given here.)
+
+
+@section Additional testing for Java Class Libraries
+
+The Java runtime tests can be executed via @samp{make check}
+in the @file{@var{target}/libjava/testsuite} directory in
+the build tree.
+
+The @uref{http://sourceware.org/mauve/,,Mauve Project} provides
+a suite of tests for the Java Class Libraries.  This suite can be run
+as part of libgcj testing by placing the Mauve tree within the libjava
+testsuite at @file{libjava/testsuite/libjava.mauve/mauve}, or by
+specifying the location of that tree when invoking @samp{make}, as in
+@samp{make MAUVEDIR=~/mauve check}.
+
+@section How to interpret test results
+
+The result of running the testsuite are various @file{*.sum} and @file{*.log}
+files in the testsuite subdirectories.  The @file{*.log} files contain a
+detailed log of the compiler invocations and the corresponding
+results, the @file{*.sum} files summarize the results.  These summaries
+contain status codes for all tests:
+
+@itemize @bullet
+@item
+PASS: the test passed as expected
+@item
+XPASS: the test unexpectedly passed
+@item
+FAIL: the test unexpectedly failed
+@item
+XFAIL: the test failed as expected
+@item
+UNSUPPORTED: the test is not supported on this platform
+@item
+ERROR: the testsuite detected an error
+@item
+WARNING: the testsuite detected a possible problem
+@end itemize
+
+It is normal for some tests to report unexpected failures.  At the
+current time the testing harness does not allow fine grained control
+over whether or not a test is expected to fail.  This problem should
+be fixed in future releases.
+
+
+@section Submitting test results
+
+If you want to report the results to the GCC project, use the
+@file{contrib/test_summary} shell script.  Start it in the @var{objdir} with
+
+@smallexample
+    @var{srcdir}/contrib/test_summary -p your_commentary.txt \
+        -m gcc-testresults@@gcc.gnu.org |sh
+@end smallexample
+
+This script uses the @command{Mail} program to send the results, so
+make sure it is in your @env{PATH}.  The file @file{your_commentary.txt} is
+prepended to the testsuite summary and should contain any special
+remarks you have on your results or your build environment.  Please
+do not edit the testsuite result block or the subject line, as these
+messages may be automatically processed.
+
+@html
+<hr />
+<p>
+@end html
+@ifhtml
+@uref{./index.html,,Return to the GCC Installation page}
+@end ifhtml
+@end ifset
+
+@c ***Final install***********************************************************
+@ifnothtml
+@comment node-name,     next,          previous, up
+@node    Final install, , Testing, Installing GCC
+@end ifnothtml
+@ifset finalinstallhtml
+@ifnothtml
+@chapter Installing GCC: Final installation
+@end ifnothtml
+
+Now that GCC has been built (and optionally tested), you can install it with
+@smallexample
+cd @var{objdir}; make install
+@end smallexample
+
+We strongly recommend to install into a target directory where there is
+no previous version of GCC present.  Also, the GNAT runtime should not
+be stripped, as this would break certain features of the debugger that
+depend on this debugging information (catching Ada exceptions for
+instance).
+
+That step completes the installation of GCC; user level binaries can
+be found in @file{@var{prefix}/bin} where @var{prefix} is the value
+you specified with the @option{--prefix} to configure (or
+@file{/usr/local} by default).  (If you specified @option{--bindir},
+that directory will be used instead; otherwise, if you specified
+@option{--exec-prefix}, @file{@var{exec-prefix}/bin} will be used.)
+Headers for the C++ and Java libraries are installed in
+@file{@var{prefix}/include}; libraries in @file{@var{libdir}}
+(normally @file{@var{prefix}/lib}); internal parts of the compiler in
+@file{@var{libdir}/gcc} and @file{@var{libexecdir}/gcc}; documentation
+in info format in @file{@var{infodir}} (normally
+@file{@var{prefix}/info}).
+
+When installing cross-compilers, GCC's executables
+are not only installed into @file{@var{bindir}}, that
+is, @file{@var{exec-prefix}/bin}, but additionally into
+@file{@var{exec-prefix}/@var{target-alias}/bin}, if that directory
+exists.  Typically, such @dfn{tooldirs} hold target-specific
+binutils, including assembler and linker.
+
+Installation into a temporary staging area or into a @command{chroot}
+jail can be achieved with the command
+
+@smallexample
+make DESTDIR=@var{path-to-rootdir} install
+@end smallexample
+
+@noindent where @var{path-to-rootdir} is the absolute path of
+a directory relative to which all installation paths will be
+interpreted.  Note that the directory specified by @code{DESTDIR}
+need not exist yet; it will be created if necessary.
+
+There is a subtle point with tooldirs and @code{DESTDIR}:
+If you relocate a cross-compiler installation with
+e.g.@: @samp{DESTDIR=@var{rootdir}}, then the directory
+@file{@var{rootdir}/@var{exec-prefix}/@var{target-alias}/bin} will
+be filled with duplicated GCC executables only if it already exists,
+it will not be created otherwise.  This is regarded as a feature,
+not as a bug, because it gives slightly more control to the packagers
+using the @code{DESTDIR} feature.
+
+If you are bootstrapping a released version of GCC then please
+quickly review the build status page for your release, available from
+@uref{http://gcc.gnu.org/buildstat.html}.
+If your system is not listed for the version of GCC that you built,
+send a note to
+@email{gcc@@gcc.gnu.org} indicating
+that you successfully built and installed GCC@.
+Include the following information:
+
+@itemize @bullet
+@item
+Output from running @file{@var{srcdir}/config.guess}.  Do not send
+that file itself, just the one-line output from running it.
+
+@item
+The output of @samp{gcc -v} for your newly installed @command{gcc}.
+This tells us which version of GCC you built and the options you passed to
+configure.
+
+@item
+Whether you enabled all languages or a subset of them.  If you used a
+full distribution then this information is part of the configure
+options in the output of @samp{gcc -v}, but if you downloaded the
+``core'' compiler plus additional front ends then it isn't apparent
+which ones you built unless you tell us about it.
+
+@item
+If the build was for GNU/Linux, also include:
+@itemize @bullet
+@item
+The distribution name and version (e.g., Red Hat 7.1 or Debian 2.2.3);
+this information should be available from @file{/etc/issue}.
+
+@item
+The version of the Linux kernel, available from @samp{uname --version}
+or @samp{uname -a}.
+
+@item
+The version of glibc you used; for RPM-based systems like Red Hat,
+Mandrake, and SuSE type @samp{rpm -q glibc} to get the glibc version,
+and on systems like Debian and Progeny use @samp{dpkg -l libc6}.
+@end itemize
+For other systems, you can include similar information if you think it is
+relevant.
+
+@item
+Any other information that you think would be useful to people building
+GCC on the same configuration.  The new entry in the build status list
+will include a link to the archived copy of your message.
+@end itemize
+
+We'd also like to know if the
+@ifnothtml
+@ref{Specific, host/target specific installation notes}
+@end ifnothtml
+@ifhtml
+@uref{specific.html,,host/target specific installation notes}
+@end ifhtml
+didn't include your host/target information or if that information is
+incomplete or out of date.  Send a note to
+@email{gcc@@gcc.gnu.org} detailing how the information should be changed.
+
+If you find a bug, please report it following the
+@uref{../bugs.html,,bug reporting guidelines}.
+
+If you want to print the GCC manuals, do @samp{cd @var{objdir}; make
+dvi}.  You will need to have @command{texi2dvi} (version at least 4.7)
+and @TeX{} installed.  This creates a number of @file{.dvi} files in
+subdirectories of @file{@var{objdir}}; these may be converted for
+printing with programs such as @command{dvips}.  Alternately, by using
+@samp{make pdf} in place of @samp{make dvi}, you can create documentation
+in the form of @file{.pdf} files; this requires @command{texi2pdf}, which
+is included with Texinfo version 4.8 and later.  You can also
+@uref{http://shop.fsf.org/,,buy printed manuals from the
+Free Software Foundation}, though such manuals may not be for the most
+recent version of GCC@.
+
+If you would like to generate online HTML documentation, do @samp{cd
+@var{objdir}; make html} and HTML will be generated for the gcc manuals in
+@file{@var{objdir}/gcc/HTML}.
+
+@html
+<hr />
+<p>
+@end html
+@ifhtml
+@uref{./index.html,,Return to the GCC Installation page}
+@end ifhtml
+@end ifset
+
+@c ***Binaries****************************************************************
+@ifnothtml
+@comment node-name,     next,          previous, up
+@node    Binaries, Specific, Installing GCC, Top
+@end ifnothtml
+@ifset binarieshtml
+@ifnothtml
+@chapter Installing GCC: Binaries
+@end ifnothtml
+@cindex Binaries
+@cindex Installing GCC: Binaries
+
+We are often asked about pre-compiled versions of GCC@.  While we cannot
+provide these for all platforms, below you'll find links to binaries for
+various platforms where creating them by yourself is not easy due to various
+reasons.
+
+Please note that we did not create these binaries, nor do we
+support them.  If you have any problems installing them, please
+contact their makers.
+
+@itemize
+@item
+AIX:
+@itemize
+@item
+@uref{http://www.bullfreeware.com,,Bull's Freeware and Shareware Archive for AIX};
+
+@item
+@uref{http://pware.hvcc.edu,,Hudson Valley Community College Open Source Software for IBM System p};
+
+@item
+@uref{http://www.perzl.org/aix/,,AIX 5L and 6 Open Source Packages}.
+@end itemize
+
+@item
+DOS---@uref{http://www.delorie.com/djgpp/,,DJGPP}.
+
+@item
+Renesas H8/300[HS]---@uref{http://h8300-hms.sourceforge.net/,,GNU
+Development Tools for the Renesas H8/300[HS] Series}.
+
+@item
+HP-UX:
+@itemize
+@item
+@uref{http://hpux.cs.utah.edu/,,HP-UX Porting Center};
+
+@item
+@uref{ftp://sunsite.informatik.rwth-aachen.de/pub/packages/gcc_hpux/,,Binaries for HP-UX 11.00 at Aachen University of Technology}.
+@end itemize
+
+@item
+Motorola 68HC11/68HC12---@uref{http://www.gnu-m68hc11.org,,GNU
+Development Tools for the Motorola 68HC11/68HC12}.
+
+@item
+@uref{http://www.sco.com/skunkware/devtools/index.html#gcc,,SCO
+OpenServer/Unixware}.
+
+@item
+Solaris 2 (SPARC, Intel)---@uref{http://www.sunfreeware.com/,,Sunfreeware}.
+
+@item
+SGI---@uref{http://freeware.sgi.com/,,SGI Freeware}.
+
+@item
+Microsoft Windows:
+@itemize
+@item
+The @uref{http://sourceware.org/cygwin/,,Cygwin} project;
+@item
+The @uref{http://www.mingw.org/,,MinGW} project.
+@end itemize
+
+@item
+@uref{ftp://ftp.thewrittenword.com/packages/by-name/,,The
+Written Word} offers binaries for
+AIX 4.3.3, 5.1 and 5.2,
+IRIX 6.5,
+Tru64 UNIX 4.0D and 5.1,
+GNU/Linux (i386),
+HP-UX 10.20, 11.00, and 11.11, and
+Solaris/SPARC 2.5.1, 2.6, 7, 8, 9 and 10.
+
+@item
+@uref{http://www.openpkg.org/,,OpenPKG} offers binaries for quite a
+number of platforms.
+
+@item
+The @uref{http://gcc.gnu.org/wiki/GFortranBinaries,,GFortran Wiki} has
+links to GNU Fortran binaries for several platforms.
+@end itemize
+
+In addition to those specific offerings, you can get a binary
+distribution CD-ROM from the
+@uref{http://www.gnu.org/order/order.html,,Free Software Foundation}.
+It contains binaries for a number of platforms, and
+includes not only GCC, but other stuff as well.  The current CD does
+not contain the latest version of GCC, but it should allow
+bootstrapping the compiler.  An updated version of that disk is in the
+works.
+
+@html
+<hr />
+<p>
+@end html
+@ifhtml
+@uref{./index.html,,Return to the GCC Installation page}
+@end ifhtml
+@end ifset
+
+@c ***Specific****************************************************************
+@ifnothtml
+@comment node-name,     next,          previous, up
+@node    Specific, Old, Binaries, Top
+@end ifnothtml
+@ifset specifichtml
+@ifnothtml
+@chapter Host/target specific installation notes for GCC
+@end ifnothtml
+@cindex Specific
+@cindex Specific installation notes
+@cindex Target specific installation
+@cindex Host specific installation
+@cindex Target specific installation notes
+
+Please read this document carefully @emph{before} installing the
+GNU Compiler Collection on your machine.
+
+Note that this list of install notes is @emph{not} a list of supported
+hosts or targets.  Not all supported hosts and targets are listed
+here, only the ones that require host-specific or target-specific
+information are.
+
+@ifhtml
+@itemize
+@item
+@uref{#alpha-x-x,,alpha*-*-*}
+@item
+@uref{#alpha-dec-osf,,alpha*-dec-osf*}
+@item
+@uref{#arc-x-elf,,arc-*-elf}
+@item
+@uref{#arm-x-elf,,arm-*-elf}
+@uref{#arm-x-coff,,arm-*-coff}
+@uref{#arm-x-aout,,arm-*-aout}
+@item
+@uref{#avr,,avr}
+@item
+@uref{#bfin,,Blackfin}
+@item
+@uref{#dos,,DOS}
+@item
+@uref{#x-x-freebsd,,*-*-freebsd*}
+@item
+@uref{#h8300-hms,,h8300-hms}
+@item
+@uref{#hppa-hp-hpux,,hppa*-hp-hpux*}
+@item
+@uref{#hppa-hp-hpux10,,hppa*-hp-hpux10}
+@item
+@uref{#hppa-hp-hpux11,,hppa*-hp-hpux11}
+@item
+@uref{#x-x-linux-gnu,,*-*-linux-gnu}
+@item
+@uref{#ix86-x-linux,,i?86-*-linux*}
+@item
+@uref{#ix86-x-solaris210,,i?86-*-solaris2.10}
+@item
+@uref{#ia64-x-linux,,ia64-*-linux}
+@item
+@uref{#ia64-x-hpux,,ia64-*-hpux*}
+@item
+@uref{#x-ibm-aix,,*-ibm-aix*}
+@item
+@uref{#iq2000-x-elf,,iq2000-*-elf}
+@item
+@uref{#m32c-x-elf,,m32c-*-elf}
+@item
+@uref{#m32r-x-elf,,m32r-*-elf}
+@item
+@uref{#m6811-elf,,m6811-elf}
+@item
+@uref{#m6812-elf,,m6812-elf}
+@item
+@uref{#m68k-x-x,,m68k-*-*}
+@item
+@uref{#m68k-uclinux,,m68k-uclinux}
+@item
+@uref{#mips-x-x,,mips-*-*}
+@item
+@uref{#mips-sgi-irix5,,mips-sgi-irix5}
+@item
+@uref{#mips-sgi-irix6,,mips-sgi-irix6}
+@item
+@uref{#powerpc-x-x,,powerpc*-*-*}
+@item
+@uref{#powerpc-x-darwin,,powerpc-*-darwin*}
+@item
+@uref{#powerpc-x-elf,,powerpc-*-elf}
+@item
+@uref{#powerpc-x-linux-gnu,,powerpc*-*-linux-gnu*}
+@item
+@uref{#powerpc-x-netbsd,,powerpc-*-netbsd*}
+@item
+@uref{#powerpc-x-eabisim,,powerpc-*-eabisim}
+@item
+@uref{#powerpc-x-eabi,,powerpc-*-eabi}
+@item
+@uref{#powerpcle-x-elf,,powerpcle-*-elf}
+@item
+@uref{#powerpcle-x-eabisim,,powerpcle-*-eabisim}
+@item
+@uref{#powerpcle-x-eabi,,powerpcle-*-eabi}
+@item
+@uref{#s390-x-linux,,s390-*-linux*}
+@item
+@uref{#s390x-x-linux,,s390x-*-linux*}
+@item
+@uref{#s390x-ibm-tpf,,s390x-ibm-tpf*}
+@item
+@uref{#x-x-solaris2,,*-*-solaris2*}
+@item
+@uref{#sparc-sun-solaris2,,sparc-sun-solaris2*}
+@item
+@uref{#sparc-sun-solaris27,,sparc-sun-solaris2.7}
+@item
+@uref{#sparc-x-linux,,sparc-*-linux*}
+@item
+@uref{#sparc64-x-solaris2,,sparc64-*-solaris2*}
+@item
+@uref{#sparcv9-x-solaris2,,sparcv9-*-solaris2*}
+@item
+@uref{#x-x-vxworks,,*-*-vxworks*}
+@item
+@uref{#x86-64-x-x,,x86_64-*-*, amd64-*-*}
+@item
+@uref{#xtensa-x-elf,,xtensa*-*-elf}
+@item
+@uref{#xtensa-x-linux,,xtensa*-*-linux*}
+@item
+@uref{#windows,,Microsoft Windows}
+@item
+@uref{#x-x-cygwin,,*-*-cygwin}
+@item
+@uref{#x-x-interix,,*-*-interix}
+@item
+@uref{#x-x-mingw,,*-*-mingw}
+@item
+@uref{#os2,,OS/2}
+@item
+@uref{#older,,Older systems}
+@end itemize
+
+@itemize
+@item
+@uref{#elf,,all ELF targets} (SVR4, Solaris 2, etc.)
+@end itemize
+@end ifhtml
+
+
+@html
+<!-- -------- host/target specific issues start here ---------------- -->
+<hr />
+@end html
+@heading @anchor{alpha-x-x}alpha*-*-*
+
+This section contains general configuration information for all
+alpha-based platforms using ELF (in particular, ignore this section for
+DEC OSF/1, Digital UNIX and Tru64 UNIX)@.  In addition to reading this
+section, please read all other sections that match your target.
+
+We require binutils 2.11.2 or newer.
+Previous binutils releases had a number of problems with DWARF 2
+debugging information, not the least of which is incorrect linking of
+shared libraries.
+
+@html
+<hr />
+@end html
+@heading @anchor{alpha-dec-osf}alpha*-dec-osf*
+Systems using processors that implement the DEC Alpha architecture and
+are running the DEC/Compaq Unix (DEC OSF/1, Digital UNIX, or Compaq
+Tru64 UNIX) operating system, for example the DEC Alpha AXP systems.
+
+As of GCC 3.2, versions before @code{alpha*-dec-osf4} are no longer
+supported.  (These are the versions which identify themselves as DEC
+OSF/1.)
+
+In Digital Unix V4.0, virtual memory exhausted bootstrap failures
+may be fixed by configuring with @option{--with-gc=simple},
+reconfiguring Kernel Virtual Memory and Swap parameters
+per the @command{/usr/sbin/sys_check} Tuning Suggestions,
+or applying the patch in
+@uref{http://gcc.gnu.org/ml/gcc/2002-08/msg00822.html}.
+
+In Tru64 UNIX V5.1, Compaq introduced a new assembler that does not
+currently (2001-06-13) work with @command{mips-tfile}.  As a workaround,
+we need to use the old assembler, invoked via the barely documented
+@option{-oldas} option.  To bootstrap GCC, you either need to use the
+Compaq C Compiler:
+
+@smallexample
+   % CC=cc @var{srcdir}/configure [@var{options}] [@var{target}]
+@end smallexample
+
+or you can use a copy of GCC 2.95.3 or higher built on Tru64 UNIX V4.0:
+
+@smallexample
+   % CC=gcc -Wa,-oldas @var{srcdir}/configure [@var{options}] [@var{target}]
+@end smallexample
+
+As of GNU binutils 2.11.2, neither GNU @command{as} nor GNU @command{ld}
+are supported on Tru64 UNIX, so you must not configure GCC with
+@option{--with-gnu-as} or @option{--with-gnu-ld}.
+
+GCC writes a @samp{.verstamp} directive to the assembler output file
+unless it is built as a cross-compiler.  It gets the version to use from
+the system header file @file{/usr/include/stamp.h}.  If you install a
+new version of DEC Unix, you should rebuild GCC to pick up the new version
+stamp.
+
+@samp{make compare} may fail on old versions of DEC Unix unless you add
+@option{-save-temps} to @code{BOOT_CFLAGS}.  On these systems, the name
+of the assembler input file is stored in the object file, and that makes
+comparison fail if it differs between the @code{stage1} and
+@code{stage2} compilations.  The option @option{-save-temps} forces a
+fixed name to be used for the assembler input file, instead of a
+randomly chosen name in @file{/tmp}.  Do not add @option{-save-temps}
+unless the comparisons fail without that option.  If you add
+@option{-save-temps}, you will have to manually delete the @samp{.i} and
+@samp{.s} files after each series of compilations.
+
+GCC now supports both the native (ECOFF) debugging format used by DBX
+and GDB and an encapsulated STABS format for use only with GDB@.  See the
+discussion of the @option{--with-stabs} option of @file{configure} above
+for more information on these formats and how to select them.
+
+There is a bug in DEC's assembler that produces incorrect line numbers
+for ECOFF format when the @samp{.align} directive is used.  To work
+around this problem, GCC will not emit such alignment directives
+while writing ECOFF format debugging information even if optimization is
+being performed.  Unfortunately, this has the very undesirable
+side-effect that code addresses when @option{-O} is specified are
+different depending on whether or not @option{-g} is also specified.
+
+To avoid this behavior, specify @option{-gstabs+} and use GDB instead of
+DBX@.  DEC is now aware of this problem with the assembler and hopes to
+provide a fix shortly.
+
+@html
+<hr />
+@end html
+@heading @anchor{arc-x-elf}arc-*-elf
+Argonaut ARC processor.
+This configuration is intended for embedded systems.
+
+@html
+<hr />
+@end html
+@heading @anchor{arm-x-elf}arm-*-elf
+ARM-family processors.  Subtargets that use the ELF object format
+require GNU binutils 2.13 or newer.  Such subtargets include:
+@code{arm-*-freebsd}, @code{arm-*-netbsdelf}, @code{arm-*-*linux}
+and @code{arm-*-rtems}.
+
+@html
+<hr />
+@end html
+@heading @anchor{arm-x-coff}arm-*-coff
+ARM-family processors.  Note that there are two different varieties
+of PE format subtarget supported: @code{arm-wince-pe} and
+@code{arm-pe} as well as a standard COFF target @code{arm-*-coff}.
+
+@html
+<hr />
+@end html
+@heading @anchor{arm-x-aout}arm-*-aout
+ARM-family processors.  These targets support the AOUT file format:
+@code{arm-*-aout}, @code{arm-*-netbsd}.
+
+@html
+<hr />
+@end html
+@heading @anchor{avr}avr
+
+ATMEL AVR-family micro controllers.  These are used in embedded
+applications.  There are no standard Unix configurations.
+@ifnothtml
+@xref{AVR Options,, AVR Options, gcc, Using the GNU Compiler
+Collection (GCC)},
+@end ifnothtml
+@ifhtml
+See ``AVR Options'' in the main manual
+@end ifhtml
+for the list of supported MCU types.
+
+Use @samp{configure --target=avr --enable-languages="c"} to configure GCC@.
+
+Further installation notes and other useful information about AVR tools
+can also be obtained from:
+
+@itemize @bullet
+@item
+@uref{http://www.nongnu.org/avr/,,http://www.nongnu.org/avr/}
+@item
+@uref{http://www.amelek.gda.pl/avr/,,http://www.amelek.gda.pl/avr/}
+@end itemize
+
+We @emph{strongly} recommend using binutils 2.13 or newer.
+
+The following error:
+@smallexample
+  Error: register required
+@end smallexample
+
+indicates that you should upgrade to a newer version of the binutils.
+
+@html
+<hr />
+@end html
+@heading @anchor{bfin}Blackfin
+
+The Blackfin processor, an Analog Devices DSP.
+@ifnothtml
+@xref{Blackfin Options,, Blackfin Options, gcc, Using the GNU Compiler
+Collection (GCC)},
+@end ifnothtml
+@ifhtml
+See ``Blackfin Options'' in the main manual
+@end ifhtml
+
+More information, and a version of binutils with support for this processor,
+is available at @uref{http://blackfin.uclinux.org}
+
+@html
+<hr />
+@end html
+@heading @anchor{cris}CRIS
+
+CRIS is the CPU architecture in Axis Communications ETRAX system-on-a-chip
+series.  These are used in embedded applications.
+
+@ifnothtml
+@xref{CRIS Options,, CRIS Options, gcc, Using the GNU Compiler
+Collection (GCC)},
+@end ifnothtml
+@ifhtml
+See ``CRIS Options'' in the main manual
+@end ifhtml
+for a list of CRIS-specific options.
+
+There are a few different CRIS targets:
+@table @code
+@item cris-axis-elf
+Mainly for monolithic embedded systems.  Includes a multilib for the
+@samp{v10} core used in @samp{ETRAX 100 LX}.
+@item cris-axis-linux-gnu
+A GNU/Linux port for the CRIS architecture, currently targeting
+@samp{ETRAX 100 LX} by default.
+@end table
+
+For @code{cris-axis-elf} you need binutils 2.11
+or newer.  For @code{cris-axis-linux-gnu} you need binutils 2.12 or newer.
+
+Pre-packaged tools can be obtained from
+@uref{ftp://ftp.axis.com/pub/axis/tools/cris/compiler-kit/}.  More
+information about this platform is available at
+@uref{http://developer.axis.com/}.
+
+@html
+<hr />
+@end html
+@heading @anchor{crx}CRX
+
+The CRX CompactRISC architecture is a low-power 32-bit architecture with
+fast context switching and architectural extensibility features.
+
+@ifnothtml
+@xref{CRX Options,, CRX Options, gcc, Using and Porting the GNU Compiler
+Collection (GCC)},
+@end ifnothtml
+
+@ifhtml
+See ``CRX Options'' in the main manual for a list of CRX-specific options.
+@end ifhtml
+
+Use @samp{configure --target=crx-elf --enable-languages=c,c++} to configure
+GCC@ for building a CRX cross-compiler. The option @samp{--target=crx-elf}
+is also used to build the @samp{newlib} C library for CRX.
+
+It is also possible to build libstdc++-v3 for the CRX architecture. This
+needs to be done in a separate step with the following configure settings:
+@samp{gcc/libstdc++-v3/configure --host=crx-elf --with-newlib
+--enable-sjlj-exceptions --enable-cxx-flags='-fexceptions -frtti'}
+
+@html
+<hr />
+@end html
+@heading @anchor{dos}DOS
+
+Please have a look at the @uref{binaries.html,,binaries page}.
+
+You cannot install GCC by itself on MSDOS; it will not compile under
+any MSDOS compiler except itself.  You need to get the complete
+compilation package DJGPP, which includes binaries as well as sources,
+and includes all the necessary compilation tools and libraries.
+
+@html
+<hr />
+@end html
+@heading @anchor{x-x-freebsd}*-*-freebsd*
+
+The version of binutils installed in @file{/usr/bin} probably works with
+this release of GCC@.  However, on FreeBSD 4, bootstrapping against the
+latest FSF binutils is known to improve overall testsuite results; and,
+on FreeBSD/alpha, using binutils 2.14 or later is required to build libjava.
+
+Support for FreeBSD 1 was discontinued in GCC 3.2.
+
+Support for FreeBSD 2 will be discontinued after GCC 3.4.  The
+following was true for GCC 3.1 but the current status is unknown.
+For FreeBSD 2 or any mutant a.out versions of FreeBSD 3: All
+configuration support and files as shipped with GCC 2.95 are still in
+place.  FreeBSD 2.2.7 has been known to bootstrap completely; however,
+it is unknown which version of binutils was used (it is assumed that it
+was the system copy in @file{/usr/bin}) and C++ EH failures were noted.
+
+For FreeBSD using the ELF file format: DWARF 2 debugging is now the
+default for all CPU architectures.  It had been the default on
+FreeBSD/alpha since its inception.  You may use @option{-gstabs} instead
+of @option{-g}, if you really want the old debugging format.  There are
+no known issues with mixing object files and libraries with different
+debugging formats.  Otherwise, this release of GCC should now match more
+of the configuration used in the stock FreeBSD configuration of GCC@.  In
+particular, @option{--enable-threads} is now configured by default.
+However, as a general user, do not attempt to replace the system
+compiler with this release.  Known to bootstrap and check with good
+results on FreeBSD 4.9-STABLE and 5-CURRENT@.  In the past, known to
+bootstrap and check with good results on FreeBSD 3.0, 3.4, 4.0, 4.2,
+4.3, 4.4, 4.5, 4.8-STABLE@.
+
+In principle, @option{--enable-threads} is now compatible with
+@option{--enable-libgcj} on FreeBSD@.  However, it has only been built
+and tested on @samp{i386-*-freebsd[45]} and @samp{alpha-*-freebsd[45]}.
+The static
+library may be incorrectly built (symbols are missing at link time).
+There is a rare timing-based startup hang (probably involves an
+assumption about the thread library).  Multi-threaded boehm-gc (required for
+libjava) exposes severe threaded signal-handling bugs on FreeBSD before
+4.5-RELEASE@.  Other CPU architectures
+supported by FreeBSD will require additional configuration tuning in, at
+the very least, both boehm-gc and libffi.
+
+Shared @file{libgcc_s.so} is now built and installed by default.
+
+@html
+<hr />
+@end html
+@heading @anchor{h8300-hms}h8300-hms
+Renesas H8/300 series of processors.
+
+Please have a look at the @uref{binaries.html,,binaries page}.
+
+The calling convention and structure layout has changed in release 2.6.
+All code must be recompiled.  The calling convention now passes the
+first three arguments in function calls in registers.  Structures are no
+longer a multiple of 2 bytes.
+
+@html
+<hr />
+@end html
+@heading @anchor{hppa-hp-hpux}hppa*-hp-hpux*
+Support for HP-UX version 9 and older was discontinued in GCC 3.4.
+
+We require using gas/binutils on all hppa platforms.  Version 2.19 or
+later is recommended.
+
+It may be helpful to configure GCC with the
+@uref{./configure.html#with-gnu-as,,@option{--with-gnu-as}} and
+@option{--with-as=@dots{}} options to ensure that GCC can find GAS@.
+
+The HP assembler should not be used with GCC.  It is rarely tested and may
+not work.  It shouldn't be used with any languages other than C due to its
+many limitations.
+
+Specifically, @option{-g} does not work (HP-UX uses a peculiar debugging
+format which GCC does not know about).  It also inserts timestamps
+into each object file it creates, causing the 3-stage comparison test to
+fail during a bootstrap.  You should be able to continue by saying
+@samp{make all-host all-target} after getting the failure from @samp{make}.
+
+Various GCC features are not supported.  For example, it does not support weak
+symbols or alias definitions.  As a result, explicit template instantiations
+are required when using C++.  This makes it difficult if not impossible to
+build many C++ applications.
+
+There are two default scheduling models for instructions.  These are
+PROCESSOR_7100LC and PROCESSOR_8000.  They are selected from the pa-risc
+architecture specified for the target machine when configuring.
+PROCESSOR_8000 is the default.  PROCESSOR_7100LC is selected when
+the target is a @samp{hppa1*} machine.
+
+The PROCESSOR_8000 model is not well suited to older processors.  Thus,
+it is important to completely specify the machine architecture when
+configuring if you want a model other than PROCESSOR_8000.  The macro
+TARGET_SCHED_DEFAULT can be defined in BOOT_CFLAGS if a different
+default scheduling model is desired.
+
+As of GCC 4.0, GCC uses the UNIX 95 namespace for HP-UX 10.10
+through 11.00, and the UNIX 98 namespace for HP-UX 11.11 and later.
+This namespace change might cause problems when bootstrapping with
+an earlier version of GCC or the HP compiler as essentially the same
+namespace is required for an entire build.  This problem can be avoided
+in a number of ways.  With HP cc, @env{UNIX_STD} can be set to @samp{95}
+or @samp{98}.  Another way is to add an appropriate set of predefines
+to @env{CC}.  The description for the @option{munix=} option contains
+a list of the predefines used with each standard.
+
+More specific information to @samp{hppa*-hp-hpux*} targets follows.
+
+@html
+<hr />
+@end html
+@heading @anchor{hppa-hp-hpux10}hppa*-hp-hpux10
+
+For hpux10.20, we @emph{highly} recommend you pick up the latest sed patch
+@code{PHCO_19798} from HP@.  HP has two sites which provide patches free of
+charge:
+
+@itemize @bullet
+@item
+@html
+<a href="http://us.itrc.hp.com/service/home/home.do">US, Canada, Asia-Pacific, and
+Latin-America</a>
+@end html
+@ifnothtml
+@uref{http://us.itrc.hp.com/service/home/home.do,,} US, Canada, Asia-Pacific,
+and Latin-America.
+@end ifnothtml
+@item
+@uref{http://europe.itrc.hp.com/service/home/home.do,,} Europe.
+@end itemize
+
+The C++ ABI has changed incompatibly in GCC 4.0.  COMDAT subspaces are
+used for one-only code and data.  This resolves many of the previous
+problems in using C++ on this target.  However, the ABI is not compatible
+with the one implemented under HP-UX 11 using secondary definitions.
+
+@html
+<hr />
+@end html
+@heading @anchor{hppa-hp-hpux11}hppa*-hp-hpux11
+
+GCC 3.0 and up support HP-UX 11.  GCC 2.95.x is not supported and cannot
+be used to compile GCC 3.0 and up.
+
+The libffi and libjava libraries haven't been ported to 64-bit HP-UX@
+and don't build.
+
+Refer to @uref{binaries.html,,binaries} for information about obtaining
+precompiled GCC binaries for HP-UX@.  Precompiled binaries must be obtained
+to build the Ada language as it can't be bootstrapped using C@.  Ada is
+only available for the 32-bit PA-RISC runtime.
+
+Starting with GCC 3.4 an ISO C compiler is required to bootstrap.  The
+bundled compiler supports only traditional C; you will need either HP's
+unbundled compiler, or a binary distribution of GCC@.
+
+It is possible to build GCC 3.3 starting with the bundled HP compiler,
+but the process requires several steps.  GCC 3.3 can then be used to
+build later versions.  The fastjar program contains ISO C code and
+can't be built with the HP bundled compiler.  This problem can be
+avoided by not building the Java language.  For example, use the
+@option{--enable-languages="c,c++,f77,objc"} option in your configure
+command.
+
+There are several possible approaches to building the distribution.
+Binutils can be built first using the HP tools.  Then, the GCC
+distribution can be built.  The second approach is to build GCC
+first using the HP tools, then build binutils, then rebuild GCC@.
+There have been problems with various binary distributions, so it
+is best not to start from a binary distribution.
+
+On 64-bit capable systems, there are two distinct targets.  Different
+installation prefixes must be used if both are to be installed on
+the same system.  The @samp{hppa[1-2]*-hp-hpux11*} target generates code
+for the 32-bit PA-RISC runtime architecture and uses the HP linker.
+The @samp{hppa64-hp-hpux11*} target generates 64-bit code for the
+PA-RISC 2.0 architecture.
+
+The script config.guess now selects the target type based on the compiler
+detected during configuration.  You must define @env{PATH} or @env{CC} so
+that configure finds an appropriate compiler for the initial bootstrap.
+When @env{CC} is used, the definition should contain the options that are
+needed whenever @env{CC} is used.
+
+Specifically, options that determine the runtime architecture must be
+in @env{CC} to correctly select the target for the build.  It is also
+convenient to place many other compiler options in @env{CC}.  For example,
+@env{CC="cc -Ac +DA2.0W -Wp,-H16376 -D_CLASSIC_TYPES -D_HPUX_SOURCE"}
+can be used to bootstrap the GCC 3.3 branch with the HP compiler in
+64-bit K&R/bundled mode.  The @option{+DA2.0W} option will result in
+the automatic selection of the @samp{hppa64-hp-hpux11*} target.  The
+macro definition table of cpp needs to be increased for a successful
+build with the HP compiler.  _CLASSIC_TYPES and _HPUX_SOURCE need to
+be defined when building with the bundled compiler, or when using the
+@option{-Ac} option.  These defines aren't necessary with @option{-Ae}.
+
+It is best to explicitly configure the @samp{hppa64-hp-hpux11*} target
+with the @option{--with-ld=@dots{}} option.  This overrides the standard
+search for ld.  The two linkers supported on this target require different
+commands.  The default linker is determined during configuration.  As a
+result, it's not possible to switch linkers in the middle of a GCC build.
+This has been reported to sometimes occur in unified builds of binutils
+and GCC@.
+
+A recent linker patch must be installed for the correct operation of
+GCC 3.3 and later.  @code{PHSS_26559} and @code{PHSS_24304} are the
+oldest linker patches that are known to work.  They are for HP-UX
+11.00 and 11.11, respectively.  @code{PHSS_24303}, the companion to
+@code{PHSS_24304}, might be usable but it hasn't been tested.  These
+patches have been superseded.  Consult the HP patch database to obtain
+the currently recommended linker patch for your system.
+
+The patches are necessary for the support of weak symbols on the
+32-bit port, and for the running of initializers and finalizers.  Weak
+symbols are implemented using SOM secondary definition symbols.  Prior
+to HP-UX 11, there are bugs in the linker support for secondary symbols.
+The patches correct a problem of linker core dumps creating shared
+libraries containing secondary symbols, as well as various other
+linking issues involving secondary symbols.
+
+GCC 3.3 uses the ELF DT_INIT_ARRAY and DT_FINI_ARRAY capabilities to
+run initializers and finalizers on the 64-bit port.  The 32-bit port
+uses the linker @option{+init} and @option{+fini} options for the same
+purpose.  The patches correct various problems with the +init/+fini
+options, including program core dumps.  Binutils 2.14 corrects a
+problem on the 64-bit port resulting from HP's non-standard use of
+the .init and .fini sections for array initializers and finalizers.
+
+Although the HP and GNU linkers are both supported for the
+@samp{hppa64-hp-hpux11*} target, it is strongly recommended that the
+HP linker be used for link editing on this target.
+
+At this time, the GNU linker does not support the creation of long
+branch stubs.  As a result, it can't successfully link binaries
+containing branch offsets larger than 8 megabytes.  In addition,
+there are problems linking shared libraries, linking executables
+with @option{-static}, and with dwarf2 unwind and exception support.
+It also doesn't provide stubs for internal calls to global functions
+in shared libraries, so these calls can't be overloaded.
+
+The HP dynamic loader does not support GNU symbol versioning, so symbol
+versioning is not supported.  It may be necessary to disable symbol
+versioning with @option{--disable-symvers} when using GNU ld.
+
+POSIX threads are the default.  The optional DCE thread library is not
+supported, so @option{--enable-threads=dce} does not work.
+
+@html
+<hr />
+@end html
+@heading @anchor{x-x-linux-gnu}*-*-linux-gnu
+
+Versions of libstdc++-v3 starting with 3.2.1 require bug fixes present
+in glibc 2.2.5 and later.  More information is available in the
+libstdc++-v3 documentation.
+
+@html
+<hr />
+@end html
+@heading @anchor{ix86-x-linux}i?86-*-linux*
+
+As of GCC 3.3, binutils 2.13.1 or later is required for this platform.
+See @uref{http://gcc.gnu.org/PR10877,,bug 10877} for more information.
+
+If you receive Signal 11 errors when building on GNU/Linux, then it is
+possible you have a hardware problem.  Further information on this can be
+found on @uref{http://www.bitwizard.nl/sig11/,,www.bitwizard.nl}.
+
+@html
+<hr />
+@end html
+@heading @anchor{ix86-x-solaris210}i?86-*-solaris2.10
+Use this for Solaris 10 or later on x86 and x86-64 systems.  This
+configuration is supported by GCC 4.0 and later versions only.
+
+It is recommended that you configure GCC to use the GNU assembler in
+@file{/usr/sfw/bin/gas} but the Sun linker, using the options
+@option{--with-gnu-as --with-as=/usr/sfw/bin/gas --without-gnu-ld
+--with-ld=/usr/ccs/bin/ld}.
+
+@html
+<hr />
+@end html
+@heading @anchor{ia64-x-linux}ia64-*-linux
+IA-64 processor (also known as IPF, or Itanium Processor Family)
+running GNU/Linux.
+
+If you are using the installed system libunwind library with
+@option{--with-system-libunwind}, then you must use libunwind 0.98 or
+later.
+
+None of the following versions of GCC has an ABI that is compatible
+with any of the other versions in this list, with the exception that
+Red Hat 2.96 and Trillian 000171 are compatible with each other:
+3.1, 3.0.2, 3.0.1, 3.0, Red Hat 2.96, and Trillian 000717.
+This primarily affects C++ programs and programs that create shared libraries.
+GCC 3.1 or later is recommended for compiling linux, the kernel.
+As of version 3.1 GCC is believed to be fully ABI compliant, and hence no
+more major ABI changes are expected.
+
+@html
+<hr />
+@end html
+@heading @anchor{ia64-x-hpux}ia64-*-hpux*
+Building GCC on this target requires the GNU Assembler.  The bundled HP
+assembler will not work.  To prevent GCC from using the wrong assembler,
+the option @option{--with-gnu-as} may be necessary.
+
+The GCC libunwind library has not been ported to HPUX@.  This means that for
+GCC versions 3.2.3 and earlier, @option{--enable-libunwind-exceptions}
+is required to build GCC@.  For GCC 3.3 and later, this is the default.
+For gcc 3.4.3 and later, @option{--enable-libunwind-exceptions} is
+removed and the system libunwind library will always be used.
+
+@html
+<hr />
+<!-- rs6000-ibm-aix*, powerpc-ibm-aix* -->
+@end html
+@heading @anchor{x-ibm-aix}*-ibm-aix*
+Support for AIX version 3 and older was discontinued in GCC 3.4.
+
+``out of memory'' bootstrap failures may indicate a problem with
+process resource limits (ulimit).  Hard limits are configured in the
+@file{/etc/security/limits} system configuration file.
+
+To speed up the configuration phases of bootstrapping and installing GCC,
+one may use GNU Bash instead of AIX @command{/bin/sh}, e.g.,
+
+@smallexample
+   % CONFIG_SHELL=/opt/freeware/bin/bash
+   % export CONFIG_SHELL
+@end smallexample
+
+and then proceed as described in @uref{build.html,,the build
+instructions}, where we strongly recommend specifying an absolute path
+to invoke @var{srcdir}/configure.
+
+Because GCC on AIX is built as a 32-bit executable by default,
+(although it can generate 64-bit programs) the GMP and MPFR libraries
+required by gfortran must be 32-bit libraries.  Building GMP and MPFR
+as static archive libraries works better than shared libraries.
+
+Errors involving @code{alloca} when building GCC generally are due
+to an incorrect definition of @code{CC} in the Makefile or mixing files
+compiled with the native C compiler and GCC@.  During the stage1 phase of
+the build, the native AIX compiler @strong{must} be invoked as @command{cc}
+(not @command{xlc}).  Once @command{configure} has been informed of
+@command{xlc}, one needs to use @samp{make distclean} to remove the
+configure cache files and ensure that @env{CC} environment variable
+does not provide a definition that will confuse @command{configure}.
+If this error occurs during stage2 or later, then the problem most likely
+is the version of Make (see above).
+
+The native @command{as} and @command{ld} are recommended for bootstrapping
+on AIX 4 and required for bootstrapping on AIX 5L@.  The GNU Assembler
+reports that it supports WEAK symbols on AIX 4, which causes GCC to try to
+utilize weak symbol functionality although it is not supported.  The GNU
+Assembler and Linker do not support AIX 5L sufficiently to bootstrap GCC@.
+The native AIX tools do interoperate with GCC@.
+
+Building @file{libstdc++.a} requires a fix for an AIX Assembler bug
+APAR IY26685 (AIX 4.3) or APAR IY25528 (AIX 5.1).  It also requires a
+fix for another AIX Assembler bug and a co-dependent AIX Archiver fix
+referenced as APAR IY53606 (AIX 5.2) or a APAR IY54774 (AIX 5.1)
+
+@samp{libstdc++} in GCC 3.4 increments the major version number of the
+shared object and GCC installation places the @file{libstdc++.a}
+shared library in a common location which will overwrite the and GCC
+3.3 version of the shared library.  Applications either need to be
+re-linked against the new shared library or the GCC 3.1 and GCC 3.3
+versions of the @samp{libstdc++} shared object needs to be available
+to the AIX runtime loader.  The GCC 3.1 @samp{libstdc++.so.4}, if
+present, and GCC 3.3 @samp{libstdc++.so.5} shared objects can be
+installed for runtime dynamic loading using the following steps to set
+the @samp{F_LOADONLY} flag in the shared object for @emph{each}
+multilib @file{libstdc++.a} installed:
+
+Extract the shared objects from the currently installed
+@file{libstdc++.a} archive:
+@smallexample
+   % ar -x libstdc++.a libstdc++.so.4 libstdc++.so.5
+@end smallexample
+
+Enable the @samp{F_LOADONLY} flag so that the shared object will be
+available for runtime dynamic loading, but not linking:
+@smallexample
+   % strip -e libstdc++.so.4 libstdc++.so.5
+@end smallexample
+
+Archive the runtime-only shared object in the GCC 3.4
+@file{libstdc++.a} archive:
+@smallexample
+   % ar -q libstdc++.a libstdc++.so.4 libstdc++.so.5
+@end smallexample
+
+Linking executables and shared libraries may produce warnings of
+duplicate symbols.  The assembly files generated by GCC for AIX always
+have included multiple symbol definitions for certain global variable
+and function declarations in the original program.  The warnings should
+not prevent the linker from producing a correct library or runnable
+executable.
+
+AIX 4.3 utilizes a ``large format'' archive to support both 32-bit and
+64-bit object modules.  The routines provided in AIX 4.3.0 and AIX 4.3.1
+to parse archive libraries did not handle the new format correctly.
+These routines are used by GCC and result in error messages during
+linking such as ``not a COFF file''.  The version of the routines shipped
+with AIX 4.3.1 should work for a 32-bit environment.  The @option{-g}
+option of the archive command may be used to create archives of 32-bit
+objects using the original ``small format''.  A correct version of the
+routines is shipped with AIX 4.3.2 and above.
+
+Some versions of the AIX binder (linker) can fail with a relocation
+overflow severe error when the @option{-bbigtoc} option is used to link
+GCC-produced object files into an executable that overflows the TOC@.  A fix
+for APAR IX75823 (OVERFLOW DURING LINK WHEN USING GCC AND -BBIGTOC) is
+available from IBM Customer Support and from its
+@uref{http://techsupport.services.ibm.com/,,techsupport.services.ibm.com}
+website as PTF U455193.
+
+The AIX 4.3.2.1 linker (bos.rte.bind_cmds Level 4.3.2.1) will dump core
+with a segmentation fault when invoked by any version of GCC@.  A fix for
+APAR IX87327 is available from IBM Customer Support and from its
+@uref{http://techsupport.services.ibm.com/,,techsupport.services.ibm.com}
+website as PTF U461879.  This fix is incorporated in AIX 4.3.3 and above.
+
+The initial assembler shipped with AIX 4.3.0 generates incorrect object
+files.  A fix for APAR IX74254 (64BIT DISASSEMBLED OUTPUT FROM COMPILER FAILS
+TO ASSEMBLE/BIND) is available from IBM Customer Support and from its
+@uref{http://techsupport.services.ibm.com/,,techsupport.services.ibm.com}
+website as PTF U453956.  This fix is incorporated in AIX 4.3.1 and above.
+
+AIX provides National Language Support (NLS)@.  Compilers and assemblers
+use NLS to support locale-specific representations of various data
+formats including floating-point numbers (e.g., @samp{.}  vs @samp{,} for
+separating decimal fractions).  There have been problems reported where
+GCC does not produce the same floating-point formats that the assembler
+expects.  If one encounters this problem, set the @env{LANG}
+environment variable to @samp{C} or @samp{En_US}.
+
+By default, GCC for AIX 4.1 and above produces code that can be used on
+both Power or PowerPC processors.
+
+A default can be specified with the @option{-mcpu=@var{cpu_type}}
+switch and using the configure option @option{--with-cpu-@var{cpu_type}}.
+
+@html
+<hr />
+@end html
+@heading @anchor{iq2000-x-elf}iq2000-*-elf
+Vitesse IQ2000 processors.  These are used in embedded
+applications.  There are no standard Unix configurations.
+
+@html
+<hr />
+@end html
+@heading @anchor{m32c-x-elf}m32c-*-elf
+Renesas M32C processor.
+This configuration is intended for embedded systems.
+
+@html
+<hr />
+@end html
+@heading @anchor{m32r-x-elf}m32r-*-elf
+Renesas M32R processor.
+This configuration is intended for embedded systems.
+
+@html
+<hr />
+@end html
+@heading @anchor{m6811-elf}m6811-elf
+Motorola 68HC11 family micro controllers.  These are used in embedded
+applications.  There are no standard Unix configurations.
+
+@html
+<hr />
+@end html
+@heading @anchor{m6812-elf}m6812-elf
+Motorola 68HC12 family micro controllers.  These are used in embedded
+applications.  There are no standard Unix configurations.
+
+@html
+<hr />
+@end html
+@heading @anchor{m68k-x-x}m68k-*-*
+By default, @samp{m68k-*-aout}, @samp{m68k-*-coff*},
+@samp{m68k-*-elf*}, @samp{m68k-*-rtems},  @samp{m68k-*-uclinux} and
+@samp{m68k-*-linux}
+build libraries for both M680x0 and ColdFire processors.  If you only
+need the M680x0 libraries, you can omit the ColdFire ones by passing
+@option{--with-arch=m68k} to @command{configure}.  Alternatively, you
+can omit the M680x0 libraries by passing @option{--with-arch=cf} to
+@command{configure}.  These targets default to 5206 or 5475 code as
+appropriate for the target system when
+configured with @option{--with-arch=cf} and 68020 code otherwise.
+
+The @samp{m68k-*-netbsd} and
+@samp{m68k-*-openbsd} targets also support the @option{--with-arch}
+option.  They will generate ColdFire CFV4e code when configured with
+@option{--with-arch=cf} and 68020 code otherwise.
+
+You can override the default processors listed above by configuring
+with @option{--with-cpu=@var{target}}.  This @var{target} can either
+be a @option{-mcpu} argument or one of the following values:
+@samp{m68000}, @samp{m68010}, @samp{m68020}, @samp{m68030},
+@samp{m68040}, @samp{m68060}, @samp{m68020-40} and @samp{m68020-60}.
+
+@html
+<hr />
+@end html
+@heading @anchor{m68k-x-uclinux}m68k-*-uclinux
+GCC 4.3 changed the uClinux configuration so that it uses the
+@samp{m68k-linux-gnu} ABI rather than the @samp{m68k-elf} ABI.
+It also added improved support for C++ and flat shared libraries,
+both of which were ABI changes.  However, you can still use the
+original ABI by configuring for @samp{m68k-uclinuxoldabi} or
+@samp{m68k-@var{vendor}-uclinuxoldabi}.
+
+@html
+<hr />
+@end html
+@heading @anchor{mips-x-x}mips-*-*
+If on a MIPS system you get an error message saying ``does not have gp
+sections for all it's [sic] sectons [sic]'', don't worry about it.  This
+happens whenever you use GAS with the MIPS linker, but there is not
+really anything wrong, and it is okay to use the output file.  You can
+stop such warnings by installing the GNU linker.
+
+It would be nice to extend GAS to produce the gp tables, but they are
+optional, and there should not be a warning about their absence.
+
+The libstdc++ atomic locking routines for MIPS targets requires MIPS II
+and later.  A patch went in just after the GCC 3.3 release to
+make @samp{mips*-*-*} use the generic implementation instead.  You can also
+configure for @samp{mipsel-elf} as a workaround.  The
+@samp{mips*-*-linux*} target continues to use the MIPS II routines.  More
+work on this is expected in future releases.
+
+@c If you make --with-llsc the default for another target, please also
+@c update the description of the --with-llsc option.
+
+The built-in @code{__sync_*} functions are available on MIPS II and
+later systems and others that support the @samp{ll}, @samp{sc} and
+@samp{sync} instructions.  This can be overridden by passing
+@option{--with-llsc} or @option{--without-llsc} when configuring GCC.
+Since the Linux kernel emulates these instructions if they are
+missing, the default for @samp{mips*-*-linux*} targets is
+@option{--with-llsc}.  The @option{--with-llsc} and
+@option{--without-llsc} configure options may be overridden at compile
+time by passing the @option{-mllsc} or @option{-mno-llsc} options to
+the compiler.
+
+MIPS systems check for division by zero (unless
+@option{-mno-check-zero-division} is passed to the compiler) by
+generating either a conditional trap or a break instruction.  Using
+trap results in smaller code, but is only supported on MIPS II and
+later.  Also, some versions of the Linux kernel have a bug that
+prevents trap from generating the proper signal (@code{SIGFPE}).  To enable
+the use of break, use the @option{--with-divide=breaks}
+@command{configure} option when configuring GCC@.  The default is to
+use traps on systems that support them.
+
+Cross-compilers for the MIPS as target using the MIPS assembler
+currently do not work, because the auxiliary programs
+@file{mips-tdump.c} and @file{mips-tfile.c} can't be compiled on
+anything but a MIPS@.  It does work to cross compile for a MIPS
+if you use the GNU assembler and linker.
+
+The assembler from GNU binutils 2.17 and earlier has a bug in the way
+it sorts relocations for REL targets (o32, o64, EABI).  This can cause
+bad code to be generated for simple C++ programs.  Also the linker
+from GNU binutils versions prior to 2.17 has a bug which causes the
+runtime linker stubs in very large programs, like @file{libgcj.so}, to
+be incorrectly generated.  GNU Binutils 2.18 and later (and snapshots
+made after Nov. 9, 2006) should be free from both of these problems.
+
+@html
+<hr />
+@end html
+@heading @anchor{mips-sgi-irix5}mips-sgi-irix5
+
+In order to compile GCC on an SGI running IRIX 5, the @samp{compiler_dev.hdr}
+subsystem must be installed from the IDO CD-ROM supplied by SGI@.
+It is also available for download from
+@uref{ftp://ftp.sgi.com/sgi/IRIX5.3/iris-development-option-5.3.tardist}.
+
+If you use the MIPS C compiler to bootstrap, it may be necessary
+to increase its table size for switch statements with the
+@option{-Wf,-XNg1500} option.  If you use the @option{-O2}
+optimization option, you also need to use @option{-Olimit 3000}.
+
+To enable debugging under IRIX 5, you must use GNU binutils 2.15 or
+later, and use the @option{--with-gnu-ld} @command{configure} option
+when configuring GCC@.  You need to use GNU @command{ar} and @command{nm},
+also distributed with GNU binutils.
+
+Some users have reported that @command{/bin/sh} will hang during bootstrap.
+This problem can be avoided by running the commands:
+
+@smallexample
+   % CONFIG_SHELL=/bin/ksh
+   % export CONFIG_SHELL
+@end smallexample
+
+before starting the build.
+
+@html
+<hr />
+@end html
+@heading @anchor{mips-sgi-irix6}mips-sgi-irix6
+
+If you are using SGI's MIPSpro @command{cc} as your bootstrap compiler, you must
+ensure that the N32 ABI is in use.  To test this, compile a simple C
+file with @command{cc} and then run @command{file} on the
+resulting object file.  The output should look like:
+
+@smallexample
+test.o: ELF N32 MSB @dots{}
+@end smallexample
+
+If you see:
+
+@smallexample
+test.o: ELF 32-bit MSB @dots{}
+@end smallexample
+
+or
+
+@smallexample
+test.o: ELF 64-bit MSB @dots{}
+@end smallexample
+
+then your version of @command{cc} uses the O32 or N64 ABI by default.  You
+should set the environment variable @env{CC} to @samp{cc -n32}
+before configuring GCC@.
+
+If you want the resulting @command{gcc} to run on old 32-bit systems
+with the MIPS R4400 CPU, you need to ensure that only code for the @samp{mips3}
+instruction set architecture (ISA) is generated.  While GCC 3.x does
+this correctly, both GCC 2.95 and SGI's MIPSpro @command{cc} may change
+the ISA depending on the machine where GCC is built.  Using one of them
+as the bootstrap compiler may result in @samp{mips4} code, which won't run at
+all on @samp{mips3}-only systems.  For the test program above, you should see:
+
+@smallexample
+test.o: ELF N32 MSB mips-3 @dots{}
+@end smallexample
+
+If you get:
+
+@smallexample
+test.o: ELF N32 MSB mips-4 @dots{}
+@end smallexample
+
+instead, you should set the environment variable @env{CC} to @samp{cc
+-n32 -mips3} or @samp{gcc -mips3} respectively before configuring GCC@.
+
+MIPSpro C 7.4 may cause bootstrap failures, due to a bug when inlining
+@code{memcmp}.  Either add @code{-U__INLINE_INTRINSICS} to the @env{CC}
+environment variable as a workaround or upgrade to MIPSpro C 7.4.1m.
+
+GCC on IRIX 6 is usually built to support the N32, O32 and N64 ABIs.  If
+you build GCC on a system that doesn't have the N64 libraries installed
+or cannot run 64-bit binaries,
+you need to configure with @option{--disable-multilib} so GCC doesn't
+try to use them.  This will disable building the O32 libraries, too.
+Look for @file{/usr/lib64/libc.so.1} to see if you
+have the 64-bit libraries installed.
+
+To enable debugging for the O32 ABI, you must use GNU @command{as} from
+GNU binutils 2.15 or later.  You may also use GNU @command{ld}, but
+this is not required and currently causes some problems with Ada.
+
+The @option{--enable-libgcj}
+option is disabled by default: IRIX 6 uses a very low default limit
+(20480) for the command line length.  Although @command{libtool} contains a
+workaround for this problem, at least the N64 @samp{libgcj} is known not
+to build despite this, running into an internal error of the native
+@command{ld}.  A sure fix is to increase this limit (@samp{ncargs}) to
+its maximum of 262144 bytes.  If you have root access, you can use the
+@command{systune} command to do this.
+
+@code{wchar_t} support in @samp{libstdc++} is not available for old
+IRIX 6.5.x releases, @math{x < 19}.  The problem cannot be autodetected
+and in order to build GCC for such targets you need to configure with
+@option{--disable-wchar_t}.
+
+See @uref{http://freeware.sgi.com/} for more
+information about using GCC on IRIX platforms.
+
+@html
+<hr />
+@end html
+@heading @anchor{powerpc-x-x}powerpc-*-*
+
+You can specify a default version for the @option{-mcpu=@var{cpu_type}}
+switch by using the configure option @option{--with-cpu-@var{cpu_type}}.
+
+You will need
+@uref{ftp://ftp.kernel.org/pub/linux/devel/binutils,,binutils 2.15}
+or newer for a working GCC@.
+
+@html
+<hr />
+@end html
+@heading @anchor{powerpc-x-darwin}powerpc-*-darwin*
+PowerPC running Darwin (Mac OS X kernel).
+
+Pre-installed versions of Mac OS X may not include any developer tools,
+meaning that you will not be able to build GCC from source.  Tool
+binaries are available at
+@uref{http://developer.apple.com/darwin/projects/compiler/} (free
+registration required).
+
+This version of GCC requires at least cctools-590.36.  The
+cctools-590.36 package referenced from
+@uref{http://gcc.gnu.org/ml/gcc/2006-03/msg00507.html} will not work
+on systems older than 10.3.9 (aka darwin7.9.0).
+
+@html
+<hr />
+@end html
+@heading @anchor{powerpc-x-elf}powerpc-*-elf
+PowerPC system in big endian mode, running System V.4.
+
+@html
+<hr />
+@end html
+@heading @anchor{powerpc-x-linux-gnu}powerpc*-*-linux-gnu*
+
+PowerPC system in big endian mode running Linux.
+
+@html
+<hr />
+@end html
+@heading @anchor{powerpc-x-netbsd}powerpc-*-netbsd*
+PowerPC system in big endian mode running NetBSD@.
+
+@html
+<hr />
+@end html
+@heading @anchor{powerpc-x-eabisim}powerpc-*-eabisim
+Embedded PowerPC system in big endian mode for use in running under the
+PSIM simulator.
+
+@html
+<hr />
+@end html
+@heading @anchor{powerpc-x-eabi}powerpc-*-eabi
+Embedded PowerPC system in big endian mode.
+
+@html
+<hr />
+@end html
+@heading @anchor{powerpcle-x-elf}powerpcle-*-elf
+PowerPC system in little endian mode, running System V.4.
+
+@html
+<hr />
+@end html
+@heading @anchor{powerpcle-x-eabisim}powerpcle-*-eabisim
+Embedded PowerPC system in little endian mode for use in running under
+the PSIM simulator.
+
+@html
+<hr />
+@end html
+@heading @anchor{powerpcle-x-eabi}powerpcle-*-eabi
+Embedded PowerPC system in little endian mode.
+
+@html
+<hr />
+@end html
+@heading @anchor{s390-x-linux}s390-*-linux*
+S/390 system running GNU/Linux for S/390@.
+
+@html
+<hr />
+@end html
+@heading @anchor{s390x-x-linux}s390x-*-linux*
+zSeries system (64-bit) running GNU/Linux for zSeries@.
+
+@html
+<hr />
+@end html
+@heading @anchor{s390x-ibm-tpf}s390x-ibm-tpf*
+zSeries system (64-bit) running TPF@.  This platform is
+supported as cross-compilation target only.
+
+@html
+<hr />
+@end html
+@c Please use Solaris 2 to refer to all release of Solaris, starting
+@c with 2.0 until 2.6, 7, 8, etc.  Solaris 1 was a marketing name for
+@c SunOS 4 releases which we don't use to avoid confusion.  Solaris
+@c alone is too unspecific and must be avoided.
+@heading @anchor{x-x-solaris2}*-*-solaris2*
+
+Sun does not ship a C compiler with Solaris 2.  To bootstrap and install
+GCC you first have to install a pre-built compiler, see the
+@uref{binaries.html,,binaries page} for details.
+
+The Solaris 2 @command{/bin/sh} will often fail to configure
+@file{libstdc++-v3}, @file{boehm-gc} or @file{libjava}.  We therefore
+recommend using the following initial sequence of commands
+
+@smallexample
+   % CONFIG_SHELL=/bin/ksh
+   % export CONFIG_SHELL
+@end smallexample
+
+and proceed as described in @uref{configure.html,,the configure instructions}.
+In addition we strongly recommend specifying an absolute path to invoke
+@var{srcdir}/configure.
+
+Solaris 2 comes with a number of optional OS packages.  Some of these
+are needed to use GCC fully, namely @code{SUNWarc},
+@code{SUNWbtool}, @code{SUNWesu}, @code{SUNWhea}, @code{SUNWlibm},
+@code{SUNWsprot}, and @code{SUNWtoo}.  If you did not install all
+optional packages when installing Solaris 2, you will need to verify that
+the packages that GCC needs are installed.
+
+To check whether an optional package is installed, use
+the @command{pkginfo} command.  To add an optional package, use the
+@command{pkgadd} command.  For further details, see the Solaris 2
+documentation.
+
+Trying to use the linker and other tools in
+@file{/usr/ucb} to install GCC has been observed to cause trouble.
+For example, the linker may hang indefinitely.  The fix is to remove
+@file{/usr/ucb} from your @env{PATH}.
+
+The build process works more smoothly with the legacy Sun tools so, if you
+have @file{/usr/xpg4/bin} in your @env{PATH}, we recommend that you place
+@file{/usr/bin} before @file{/usr/xpg4/bin} for the duration of the build.
+
+We recommend the use of GNU binutils 2.14 or later, or the vendor tools
+(Sun @command{as}, Sun @command{ld}).  Note that your mileage may vary
+if you use a combination of the GNU tools and the Sun tools: while the
+combination GNU @command{as} + Sun @command{ld} should reasonably work,
+the reverse combination Sun @command{as} + GNU @command{ld} is known to
+cause memory corruption at runtime in some cases for C++ programs.
+
+The stock GNU binutils 2.15 release is broken on this platform because of a
+single bug.  It has been fixed on the 2.15 branch in the CVS repository.
+You can obtain a working version by checking out the binutils-2_15-branch
+from the CVS repository or applying the patch
+@uref{http://sourceware.org/ml/binutils-cvs/2004-09/msg00036.html} to the
+release.
+
+We recommend the use of GNU binutils 2.16 or later in conjunction with GCC
+4.x, or the vendor tools (Sun @command{as}, Sun @command{ld}).  However,
+for Solaris 10 and above, an additional patch is required in order for the
+GNU linker to be able to cope with a new flavor of shared libraries.  You
+can obtain a working version by checking out the binutils-2_16-branch from
+the CVS repository or applying the patch
+@uref{http://sourceware.org/ml/binutils-cvs/2005-07/msg00122.html} to the
+release.
+
+Sun bug 4296832 turns up when compiling X11 headers with GCC 2.95 or
+newer: @command{g++} will complain that types are missing.  These headers
+assume that omitting the type means @code{int}; this assumption worked for
+C89 but is wrong for C++, and is now wrong for C99 also.
+
+@command{g++} accepts such (invalid) constructs with the option
+@option{-fpermissive}; it will assume that any missing type is @code{int}
+(as defined by C89).
+
+There are patches for Solaris 7 (108376-21 or newer for SPARC,
+108377-20 for Intel), and Solaris 8 (108652-24 or newer for SPARC,
+108653-22 for Intel) that fix this bug.
+
+Sun bug 4927647 sometimes causes random spurious testsuite failures
+related to missing diagnostic output.  This bug doesn't affect GCC
+itself, rather it is a kernel bug triggered by the @command{expect}
+program which is used only by the GCC testsuite driver.  When the bug
+causes the @command{expect} program to miss anticipated output, extra
+testsuite failures appear.
+
+There are patches for Solaris 8 (117350-12 or newer for SPARC,
+117351-12 or newer for Intel) and Solaris 9 (117171-11 or newer for
+SPARC, 117172-11 or newer for Intel) that address this problem.
+
+@html
+<hr />
+@end html
+@heading @anchor{sparc-sun-solaris2}sparc-sun-solaris2*
+
+When GCC is configured to use binutils 2.14 or later the binaries
+produced are smaller than the ones produced using Sun's native tools;
+this difference is quite significant for binaries containing debugging
+information.
+
+Starting with Solaris 7, the operating system is capable of executing
+64-bit SPARC V9 binaries.  GCC 3.1 and later properly supports
+this; the @option{-m64} option enables 64-bit code generation.
+However, if all you want is code tuned for the UltraSPARC CPU, you
+should try the @option{-mtune=ultrasparc} option instead, which produces
+code that, unlike full 64-bit code, can still run on non-UltraSPARC
+machines.
+
+When configuring on a Solaris 7 or later system that is running a kernel
+that supports only 32-bit binaries, one must configure with
+@option{--disable-multilib}, since we will not be able to build the
+64-bit target libraries.
+
+GCC 3.3 and GCC 3.4 trigger code generation bugs in earlier versions of
+the GNU compiler (especially GCC 3.0.x versions), which lead to the
+miscompilation of the stage1 compiler and the subsequent failure of the
+bootstrap process.  A workaround is to use GCC 3.2.3 as an intermediary
+stage, i.e.@: to bootstrap that compiler with the base compiler and then
+use it to bootstrap the final compiler.
+
+GCC 3.4 triggers a code generation bug in versions 5.4 (Sun ONE Studio 7)
+and 5.5 (Sun ONE Studio 8) of the Sun compiler, which causes a bootstrap
+failure in form of a miscompilation of the stage1 compiler by the Sun
+compiler.  This is Sun bug 4974440.  This is fixed with patch 112760-07.
+
+GCC 3.4 changed the default debugging format from STABS to DWARF-2 for
+32-bit code on Solaris 7 and later.  If you use the Sun assembler, this
+change apparently runs afoul of Sun bug 4910101 (which is referenced as
+a x86-only problem by Sun, probably because they do not use DWARF-2).
+A symptom of the problem is that you cannot compile C++ programs like
+@command{groff} 1.19.1 without getting messages similar to the following:
+
+@smallexample
+ld: warning: relocation error: R_SPARC_UA32: @dots{}
+  external symbolic relocation against non-allocatable section
+  .debug_info cannot be processed at runtime: relocation ignored.
+@end smallexample
+
+To work around this problem, compile with @option{-gstabs+} instead of
+plain @option{-g}.
+
+When configuring the GNU Multiple Precision Library (GMP) or the MPFR
+library on a Solaris 7 or later system, the canonical target triplet
+must be specified as the @command{build} parameter on the configure
+line.  This triplet can be obtained by invoking ./config.guess in
+the toplevel source directory of GCC (and not that of GMP or MPFR).
+For example on a Solaris 7 system:
+
+@smallexample
+   % ./configure --build=sparc-sun-solaris2.7 --prefix=xxx
+@end smallexample
+
+@html
+<hr />
+@end html
+@heading @anchor{sparc-sun-solaris27}sparc-sun-solaris2.7
+
+Sun patch 107058-01 (1999-01-13) for Solaris 7/SPARC triggers a bug in
+the dynamic linker.  This problem (Sun bug 4210064) affects GCC 2.8
+and later, including all EGCS releases.  Sun formerly recommended
+107058-01 for all Solaris 7 users, but around 1999-09-01 it started to
+recommend it only for people who use Sun's compilers.
+
+Here are some workarounds to this problem:
+@itemize @bullet
+@item
+Do not install Sun patch 107058-01 until after Sun releases a
+complete patch for bug 4210064.  This is the simplest course to take,
+unless you must also use Sun's C compiler.  Unfortunately 107058-01
+is preinstalled on some new Solaris 7-based hosts, so you may have to
+back it out.
+
+@item
+Copy the original, unpatched Solaris 7
+@command{/usr/ccs/bin/as} into
+@command{/usr/local/libexec/gcc/sparc-sun-solaris2.7/3.4/as},
+adjusting the latter name to fit your local conventions and software
+version numbers.
+
+@item
+Install Sun patch 106950-03 (1999-05-25) or later.  Nobody with
+both 107058-01 and 106950-03 installed has reported the bug with GCC
+and Sun's dynamic linker.  This last course of action is riskiest,
+for two reasons.  First, you must install 106950 on all hosts that
+run code generated by GCC; it doesn't suffice to install it only on
+the hosts that run GCC itself.  Second, Sun says that 106950-03 is
+only a partial fix for bug 4210064, but Sun doesn't know whether the
+partial fix is adequate for GCC@.  Revision -08 or later should fix
+the bug.  The current (as of 2004-05-23) revision is -24, and is included in
+the Solaris 7 Recommended Patch Cluster.
+@end itemize
+
+GCC 3.3 triggers a bug in version 5.0 Alpha 03/27/98 of the Sun assembler,
+which causes a bootstrap failure when linking the 64-bit shared version of
+libgcc.  A typical error message is:
+
+@smallexample
+ld: fatal: relocation error: R_SPARC_32: file libgcc/sparcv9/_muldi3.o:
+  symbol <unknown>:  offset 0xffffffff7ec133e7 is non-aligned.
+@end smallexample
+
+This bug has been fixed in the final 5.0 version of the assembler.
+
+A similar problem was reported for version Sun WorkShop 6 99/08/18 of the
+Sun assembler, which causes a bootstrap failure with GCC 4.0.0:
+
+@smallexample
+ld: fatal: relocation error: R_SPARC_DISP32:
+  file .libs/libstdc++.lax/libsupc++convenience.a/vterminate.o:
+    symbol <unknown>: offset 0xfccd33ad is non-aligned
+@end smallexample
+
+This bug has been fixed in more recent revisions of the assembler.
+
+@html
+<hr />
+@end html
+@heading @anchor{sparc-x-linux}sparc-*-linux*
+
+GCC versions 3.0 and higher require binutils 2.11.2 and glibc 2.2.4
+or newer on this platform.  All earlier binutils and glibc
+releases mishandled unaligned relocations on @code{sparc-*-*} targets.
+
+
+@html
+<hr />
+@end html
+@heading @anchor{sparc64-x-solaris2}sparc64-*-solaris2*
+
+When configuring the GNU Multiple Precision Library (GMP) or the
+MPFR library, the canonical target triplet must be specified as
+the @command{build} parameter on the configure line.  For example
+on a Solaris 7 system:
+
+@smallexample
+   % ./configure --build=sparc64-sun-solaris2.7 --prefix=xxx
+@end smallexample
+
+The following compiler flags must be specified in the configure
+step in order to bootstrap this target with the Sun compiler:
+
+@smallexample
+   % CC="cc -xarch=v9 -xildoff" @var{srcdir}/configure [@var{options}] [@var{target}]
+@end smallexample
+
+@option{-xarch=v9} specifies the SPARC-V9 architecture to the Sun toolchain
+and @option{-xildoff} turns off the incremental linker.
+
+@html
+<hr />
+@end html
+@heading @anchor{sparcv9-x-solaris2}sparcv9-*-solaris2*
+
+This is a synonym for sparc64-*-solaris2*.
+
+@html
+<hr />
+@end html
+@heading @anchor{x-x-vxworks}*-*-vxworks*
+Support for VxWorks is in flux.  At present GCC supports @emph{only} the
+very recent VxWorks 5.5 (aka Tornado 2.2) release, and only on PowerPC@.
+We welcome patches for other architectures supported by VxWorks 5.5.
+Support for VxWorks AE would also be welcome; we believe this is merely
+a matter of writing an appropriate ``configlette'' (see below).  We are
+not interested in supporting older, a.out or COFF-based, versions of
+VxWorks in GCC 3.
+
+VxWorks comes with an older version of GCC installed in
+@file{@var{$WIND_BASE}/host}; we recommend you do not overwrite it.
+Choose an installation @var{prefix} entirely outside @var{$WIND_BASE}.
+Before running @command{configure}, create the directories @file{@var{prefix}}
+and @file{@var{prefix}/bin}.  Link or copy the appropriate assembler,
+linker, etc.@: into @file{@var{prefix}/bin}, and set your @var{PATH} to
+include that directory while running both @command{configure} and
+@command{make}.
+
+You must give @command{configure} the
+@option{--with-headers=@var{$WIND_BASE}/target/h} switch so that it can
+find the VxWorks system headers.  Since VxWorks is a cross compilation
+target only, you must also specify @option{--target=@var{target}}.
+@command{configure} will attempt to create the directory
+@file{@var{prefix}/@var{target}/sys-include} and copy files into it;
+make sure the user running @command{configure} has sufficient privilege
+to do so.
+
+GCC's exception handling runtime requires a special ``configlette''
+module, @file{contrib/gthr_supp_vxw_5x.c}.  Follow the instructions in
+that file to add the module to your kernel build.  (Future versions of
+VxWorks will incorporate this module.)
+
+@html
+<hr />
+@end html
+@heading @anchor{x86-64-x-x}x86_64-*-*, amd64-*-*
+
+GCC supports the x86-64 architecture implemented by the AMD64 processor
+(amd64-*-* is an alias for x86_64-*-*) on GNU/Linux, FreeBSD and NetBSD@.
+On GNU/Linux the default is a bi-arch compiler which is able to generate
+both 64-bit x86-64 and 32-bit x86 code (via the @option{-m32} switch).
+
+@html
+<hr />
+@end html
+@heading @anchor{xtensa-x-elf}xtensa*-*-elf
+
+This target is intended for embedded Xtensa systems using the
+@samp{newlib} C library.  It uses ELF but does not support shared
+objects.  Designed-defined instructions specified via the
+Tensilica Instruction Extension (TIE) language are only supported
+through inline assembly.
+
+The Xtensa configuration information must be specified prior to
+building GCC@.  The @file{include/xtensa-config.h} header
+file contains the configuration information.  If you created your
+own Xtensa configuration with the Xtensa Processor Generator, the
+downloaded files include a customized copy of this header file,
+which you can use to replace the default header file.
+
+@html
+<hr />
+@end html
+@heading @anchor{xtensa-x-linux}xtensa*-*-linux*
+
+This target is for Xtensa systems running GNU/Linux.  It supports ELF
+shared objects and the GNU C library (glibc).  It also generates
+position-independent code (PIC) regardless of whether the
+@option{-fpic} or @option{-fPIC} options are used.  In other
+respects, this target is the same as the
+@uref{#xtensa*-*-elf,,@samp{xtensa*-*-elf}} target.
+
+@html
+<hr />
+@end html
+@heading @anchor{windows}Microsoft Windows
+
+@subheading Intel 16-bit versions
+The 16-bit versions of Microsoft Windows, such as Windows 3.1, are not 
+supported.
+
+However, the 32-bit port has limited support for Microsoft 
+Windows 3.11 in the Win32s environment, as a target only.  See below.
+
+@subheading Intel 32-bit versions
+
+The 32-bit versions of Windows, including Windows 95, Windows NT, Windows 
+XP, and Windows Vista, are supported by several different target 
+platforms.  These targets differ in which Windows subsystem they target 
+and which C libraries are used.
+
+@itemize
+@item Cygwin @uref{#x-x-cygwin,,*-*-cygwin}: Cygwin provides a user-space 
+Linux API emulation layer in the Win32 subsystem.
+@item Interix @uref{#x-x-interix,,*-*-interix}: The Interix subsystem 
+provides native support for POSIX.
+@item MinGW @uref{#x-x-mingw,,*-*-mingw}: MinGW is a native GCC port for 
+the Win32 subsystem that provides a subset of POSIX.
+@item MKS i386-pc-mks: NuTCracker from MKS.  See 
+@uref{http://www.mkssoftware.com/} for more information.
+@end itemize
+
+@subheading Intel 64-bit versions
+
+GCC contains support for x86-64 using the mingw-w64
+runtime library, available from @uref{http://mingw-w64.sourceforge.net/}.
+This library should be used with the target triple x86_64-pc-mingw32.
+
+Presently Windows for Itanium is not supported.
+
+@subheading Windows CE
+
+Windows CE is supported as a target only on ARM (arm-wince-pe), Hitachi 
+SuperH (sh-wince-pe), and MIPS (mips-wince-pe).
+
+@subheading Other Windows Platforms
+
+GCC no longer supports Windows NT on the Alpha or PowerPC.
+
+GCC no longer supports the Windows POSIX subsystem.  However, it does 
+support the Interix subsystem.  See above.
+
+Old target names including *-*-winnt and *-*-windowsnt are no longer used.
+
+PW32 (i386-pc-pw32) support was never completed, and the project seems to 
+be inactive.  See @uref{http://pw32.sourceforge.net/} for more information.
+
+UWIN support has been removed due to a lack of maintenance.
+
+@html
+<hr />
+@end html
+@heading @anchor{x-x-cygwin}*-*-cygwin
+
+Ports of GCC are included with the
+@uref{http://www.cygwin.com/,,Cygwin environment}.
+
+GCC will build under Cygwin without modification; it does not build
+with Microsoft's C++ compiler and there are no plans to make it do so.
+
+Cygwin can be compiled with i?86-pc-cygwin.
+
+@html
+<hr />
+@end html
+@heading @anchor{x-x-interix}*-*-interix
+
+The Interix target is used by OpenNT, Interix, Services For UNIX (SFU), 
+and Subsystem for UNIX-based Applications (SUA).  Applications compiled 
+with this target run in the Interix subsystem, which is separate from 
+the Win32 subsystem.  This target was last known to work in GCC 3.3.
+
+For more information, see @uref{http://www.interix.com/}.
+
+@html
+<hr />
+@end html
+@heading @anchor{x-x-mingw32}*-*-mingw32
+
+GCC will build with and support only MinGW runtime 3.12 and later.
+Earlier versions of headers are incompatible with the new default semantics
+of @code{extern inline} in @code{-std=c99} and @code{-std=gnu99} modes.
+
+@html
+<hr />
+@end html
+@heading @anchor{os2}OS/2
+
+GCC does not currently support OS/2.  However, Andrew Zabolotny has been
+working on a generic OS/2 port with pgcc.  The current code can be found
+at @uref{http://www.goof.com/pcg/os2/,,http://www.goof.com/pcg/os2/}.
+
+@html
+<hr />
+@end html
+@heading @anchor{older}Older systems
+
+GCC contains support files for many older (1980s and early
+1990s) Unix variants.  For the most part, support for these systems
+has not been deliberately removed, but it has not been maintained for
+several years and may suffer from bitrot.
+
+Starting with GCC 3.1, each release has a list of ``obsoleted'' systems.
+Support for these systems is still present in that release, but
+@command{configure} will fail unless the @option{--enable-obsolete}
+option is given.  Unless a maintainer steps forward, support for these
+systems will be removed from the next release of GCC@.
+
+Support for old systems as hosts for GCC can cause problems if the
+workarounds for compiler, library and operating system bugs affect the
+cleanliness or maintainability of the rest of GCC@.  In some cases, to
+bring GCC up on such a system, if still possible with current GCC, may
+require first installing an old version of GCC which did work on that
+system, and using it to compile a more recent GCC, to avoid bugs in the
+vendor compiler.  Old releases of GCC 1 and GCC 2 are available in the
+@file{old-releases} directory on the @uref{../mirrors.html,,GCC mirror
+sites}.  Header bugs may generally be avoided using
+@command{fixincludes}, but bugs or deficiencies in libraries and the
+operating system may still cause problems.
+
+Support for older systems as targets for cross-compilation is less
+problematic than support for them as hosts for GCC; if an enthusiast
+wishes to make such a target work again (including resurrecting any of
+the targets that never worked with GCC 2, starting from the last
+version before they were removed), patches
+@uref{../contribute.html,,following the usual requirements} would be
+likely to be accepted, since they should not affect the support for more
+modern targets.
+
+For some systems, old versions of GNU binutils may also be useful,
+and are available from @file{pub/binutils/old-releases} on
+@uref{http://sourceware.org/mirrors.html,,sourceware.org mirror sites}.
+
+Some of the information on specific systems above relates to
+such older systems, but much of the information
+about GCC on such systems (which may no longer be applicable to
+current GCC) is to be found in the GCC texinfo manual.
+
+@html
+<hr />
+@end html
+@heading @anchor{elf}all ELF targets (SVR4, Solaris 2, etc.)
+
+C++ support is significantly better on ELF targets if you use the
+@uref{./configure.html#with-gnu-ld,,GNU linker}; duplicate copies of
+inlines, vtables and template instantiations will be discarded
+automatically.
+
+
+@html
+<hr />
+<p>
+@end html
+@ifhtml
+@uref{./index.html,,Return to the GCC Installation page}
+@end ifhtml
+@end ifset
+
+@c ***Old documentation******************************************************
+@ifset oldhtml
+@include install-old.texi
+@html
+<hr />
+<p>
+@end html
+@ifhtml
+@uref{./index.html,,Return to the GCC Installation page}
+@end ifhtml
+@end ifset
+
+@c ***GFDL********************************************************************
+@ifset gfdlhtml
+@include fdl.texi
+@html
+<hr />
+<p>
+@end html
+@ifhtml
+@uref{./index.html,,Return to the GCC Installation page}
+@end ifhtml
+@end ifset
+
+@c ***************************************************************************
+@c Part 6 The End of the Document
+@ifinfo
+@comment node-name,     next,          previous, up
+@node    Concept Index, , GNU Free Documentation License, Top
+@end ifinfo
+
+@ifinfo
+@unnumbered Concept Index
+
+@printindex cp
+
+@contents
+@end ifinfo
+@bye
diff -Naur gcc-4.4.2.orig/gcc/doc/invoke.texi gcc-4.4.2-rtems4.10-20091015/gcc/doc/invoke.texi
--- gcc-4.4.2.orig/gcc/doc/invoke.texi	2009-09-18 23:53:23.000000000 +0200
+++ gcc-4.4.2-rtems4.10-20091015/gcc/doc/invoke.texi	2009-10-15 18:36:00.000000000 +0200
@@ -606,6 +606,10 @@
 -mno-sched-prefer-non-control-spec-insns @gol
 -mno-sched-count-spec-in-critical-path}
 
+@emph{LM32 Options}
+@gccoptlist{-mbarrel-shift-enabled -mdivide-enabled -mmultiply-enabled @gol
+-msign-extend-enabled -muser-enabled}
+
 @emph{M32R/D Options}
 @gccoptlist{-m32r2 -m32rx -m32r @gol
 -mdebug @gol
@@ -8853,6 +8857,7 @@
 * i386 and x86-64 Options::
 * i386 and x86-64 Windows Options::
 * IA-64 Options::
+* LM32 Options::
 * M32C Options::
 * M32R/D Options::
 * M680x0 Options::
@@ -11837,6 +11842,35 @@
 
 @end table
 
+@node LM32 Options
+@subsection LM32 Options
+@cindex LM32 options
+
+These @option{-m} options are defined for the Lattice Mico32 architecture:
+
+@table @gcctabopt
+@item -mbarrel-shift-enabled
+@opindex mbarrel-shift-enabled
+Enable barrel-shift instructions.
+
+@item -mdivide-enabled
+@opindex mdivide-enabled
+Enable divide and modulus instructions.
+
+@item -mmultiply-enabled
+@opindex multiply-enabled
+Enable multiply instructions.
+
+@item -msign-extend-enabled
+@opindex msign-extend-enabled
+Enable sign extend instructions.
+
+@item -muser-enabled
+@opindex muser-enabled
+Enable user-defined instructions.
+
+@end table
+
 @node M32R/D Options
 @subsection M32R/D Options
 @cindex M32R/D options
diff -Naur gcc-4.4.2.orig/gcc/doc/invoke.texi.orig gcc-4.4.2-rtems4.10-20091015/gcc/doc/invoke.texi.orig
--- gcc-4.4.2.orig/gcc/doc/invoke.texi.orig	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/gcc/doc/invoke.texi.orig	2009-10-15 18:36:00.000000000 +0200
@@ -0,0 +1,16649 @@
+@c Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+@c 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+@c Free Software Foundation, Inc.
+@c This is part of the GCC manual.
+@c For copying conditions, see the file gcc.texi.
+
+@ignore
+@c man begin INCLUDE
+@include gcc-vers.texi
+@c man end
+
+@c man begin COPYRIGHT
+Copyright @copyright{} 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
+1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+Free Software Foundation, Inc.
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.2 or
+any later version published by the Free Software Foundation; with the
+Invariant Sections being ``GNU General Public License'' and ``Funding
+Free Software'', the Front-Cover texts being (a) (see below), and with
+the Back-Cover Texts being (b) (see below).  A copy of the license is
+included in the gfdl(7) man page.
+
+(a) The FSF's Front-Cover Text is:
+
+     A GNU Manual
+
+(b) The FSF's Back-Cover Text is:
+
+     You have freedom to copy and modify this GNU Manual, like GNU
+     software.  Copies published by the Free Software Foundation raise
+     funds for GNU development.
+@c man end
+@c Set file name and title for the man page.
+@setfilename gcc
+@settitle GNU project C and C++ compiler
+@c man begin SYNOPSIS
+gcc [@option{-c}|@option{-S}|@option{-E}] [@option{-std=}@var{standard}]
+    [@option{-g}] [@option{-pg}] [@option{-O}@var{level}]
+    [@option{-W}@var{warn}@dots{}] [@option{-pedantic}]
+    [@option{-I}@var{dir}@dots{}] [@option{-L}@var{dir}@dots{}]
+    [@option{-D}@var{macro}[=@var{defn}]@dots{}] [@option{-U}@var{macro}]
+    [@option{-f}@var{option}@dots{}] [@option{-m}@var{machine-option}@dots{}]
+    [@option{-o} @var{outfile}] [@@@var{file}] @var{infile}@dots{}
+
+Only the most useful options are listed here; see below for the
+remainder.  @samp{g++} accepts mostly the same options as @samp{gcc}.
+@c man end
+@c man begin SEEALSO
+gpl(7), gfdl(7), fsf-funding(7),
+cpp(1), gcov(1), as(1), ld(1), gdb(1), adb(1), dbx(1), sdb(1)
+and the Info entries for @file{gcc}, @file{cpp}, @file{as},
+@file{ld}, @file{binutils} and @file{gdb}.
+@c man end
+@c man begin BUGS
+For instructions on reporting bugs, see
+@w{@value{BUGURL}}.
+@c man end
+@c man begin AUTHOR
+See the Info entry for @command{gcc}, or
+@w{@uref{http://gcc.gnu.org/onlinedocs/gcc/Contributors.html}},
+for contributors to GCC@.
+@c man end
+@end ignore
+
+@node Invoking GCC
+@chapter GCC Command Options
+@cindex GCC command options
+@cindex command options
+@cindex options, GCC command
+
+@c man begin DESCRIPTION
+When you invoke GCC, it normally does preprocessing, compilation,
+assembly and linking.  The ``overall options'' allow you to stop this
+process at an intermediate stage.  For example, the @option{-c} option
+says not to run the linker.  Then the output consists of object files
+output by the assembler.
+
+Other options are passed on to one stage of processing.  Some options
+control the preprocessor and others the compiler itself.  Yet other
+options control the assembler and linker; most of these are not
+documented here, since you rarely need to use any of them.
+
+@cindex C compilation options
+Most of the command line options that you can use with GCC are useful
+for C programs; when an option is only useful with another language
+(usually C++), the explanation says so explicitly.  If the description
+for a particular option does not mention a source language, you can use
+that option with all supported languages.
+
+@cindex C++ compilation options
+@xref{Invoking G++,,Compiling C++ Programs}, for a summary of special
+options for compiling C++ programs.
+
+@cindex grouping options
+@cindex options, grouping
+The @command{gcc} program accepts options and file names as operands.  Many
+options have multi-letter names; therefore multiple single-letter options
+may @emph{not} be grouped: @option{-dv} is very different from @w{@samp{-d
+-v}}.
+
+@cindex order of options
+@cindex options, order
+You can mix options and other arguments.  For the most part, the order
+you use doesn't matter.  Order does matter when you use several
+options of the same kind; for example, if you specify @option{-L} more
+than once, the directories are searched in the order specified.  Also,
+the placement of the @option{-l} option is significant.
+
+Many options have long names starting with @samp{-f} or with
+@samp{-W}---for example,
+@option{-fmove-loop-invariants}, @option{-Wformat} and so on.  Most of
+these have both positive and negative forms; the negative form of
+@option{-ffoo} would be @option{-fno-foo}.  This manual documents
+only one of these two forms, whichever one is not the default.
+
+@c man end
+
+@xref{Option Index}, for an index to GCC's options.
+
+@menu
+* Option Summary::      Brief list of all options, without explanations.
+* Overall Options::     Controlling the kind of output:
+                        an executable, object files, assembler files,
+                        or preprocessed source.
+* Invoking G++::        Compiling C++ programs.
+* C Dialect Options::   Controlling the variant of C language compiled.
+* C++ Dialect Options:: Variations on C++.
+* Objective-C and Objective-C++ Dialect Options:: Variations on Objective-C
+                        and Objective-C++.
+* Language Independent Options:: Controlling how diagnostics should be
+                        formatted.
+* Warning Options::     How picky should the compiler be?
+* Debugging Options::   Symbol tables, measurements, and debugging dumps.
+* Optimize Options::    How much optimization?
+* Preprocessor Options:: Controlling header files and macro definitions.
+                         Also, getting dependency information for Make.
+* Assembler Options::   Passing options to the assembler.
+* Link Options::        Specifying libraries and so on.
+* Directory Options::   Where to find header files and libraries.
+                        Where to find the compiler executable files.
+* Spec Files::          How to pass switches to sub-processes.
+* Target Options::      Running a cross-compiler, or an old version of GCC.
+* Submodel Options::    Specifying minor hardware or convention variations,
+                        such as 68010 vs 68020.
+* Code Gen Options::    Specifying conventions for function calls, data layout
+                        and register usage.
+* Environment Variables:: Env vars that affect GCC.
+* Precompiled Headers:: Compiling a header once, and using it many times.
+* Running Protoize::    Automatically adding or removing function prototypes.
+@end menu
+
+@c man begin OPTIONS
+
+@node Option Summary
+@section Option Summary
+
+Here is a summary of all the options, grouped by type.  Explanations are
+in the following sections.
+
+@table @emph
+@item Overall Options
+@xref{Overall Options,,Options Controlling the Kind of Output}.
+@gccoptlist{-c  -S  -E  -o @var{file}  -combine  -pipe  -pass-exit-codes  @gol
+-x @var{language}  -v  -###  --help@r{[}=@var{class}@r{[},@dots{}@r{]]}  --target-help  @gol
+--version -wrapper@@@var{file}}
+
+@item C Language Options
+@xref{C Dialect Options,,Options Controlling C Dialect}.
+@gccoptlist{-ansi  -std=@var{standard}  -fgnu89-inline @gol
+-aux-info @var{filename} @gol
+-fno-asm  -fno-builtin  -fno-builtin-@var{function} @gol
+-fhosted  -ffreestanding -fopenmp -fms-extensions @gol
+-trigraphs  -no-integrated-cpp  -traditional  -traditional-cpp @gol
+-fallow-single-precision  -fcond-mismatch -flax-vector-conversions @gol
+-fsigned-bitfields  -fsigned-char @gol
+-funsigned-bitfields  -funsigned-char}
+
+@item C++ Language Options
+@xref{C++ Dialect Options,,Options Controlling C++ Dialect}.
+@gccoptlist{-fabi-version=@var{n}  -fno-access-control  -fcheck-new @gol
+-fconserve-space  -ffriend-injection @gol
+-fno-elide-constructors @gol
+-fno-enforce-eh-specs @gol
+-ffor-scope  -fno-for-scope  -fno-gnu-keywords @gol
+-fno-implicit-templates @gol
+-fno-implicit-inline-templates @gol
+-fno-implement-inlines  -fms-extensions @gol
+-fno-nonansi-builtins  -fno-operator-names @gol
+-fno-optional-diags  -fpermissive @gol
+-frepo  -fno-rtti  -fstats  -ftemplate-depth-@var{n} @gol
+-fno-threadsafe-statics -fuse-cxa-atexit  -fno-weak  -nostdinc++ @gol
+-fno-default-inline  -fvisibility-inlines-hidden @gol
+-fvisibility-ms-compat @gol
+-Wabi  -Wctor-dtor-privacy @gol
+-Wnon-virtual-dtor  -Wreorder @gol
+-Weffc++  -Wstrict-null-sentinel @gol
+-Wno-non-template-friend  -Wold-style-cast @gol
+-Woverloaded-virtual  -Wno-pmf-conversions @gol
+-Wsign-promo}
+
+@item Objective-C and Objective-C++ Language Options
+@xref{Objective-C and Objective-C++ Dialect Options,,Options Controlling
+Objective-C and Objective-C++ Dialects}.
+@gccoptlist{-fconstant-string-class=@var{class-name} @gol
+-fgnu-runtime  -fnext-runtime @gol
+-fno-nil-receivers @gol
+-fobjc-call-cxx-cdtors @gol
+-fobjc-direct-dispatch @gol
+-fobjc-exceptions @gol
+-fobjc-gc @gol
+-freplace-objc-classes @gol
+-fzero-link @gol
+-gen-decls @gol
+-Wassign-intercept @gol
+-Wno-protocol  -Wselector @gol
+-Wstrict-selector-match @gol
+-Wundeclared-selector}
+
+@item Language Independent Options
+@xref{Language Independent Options,,Options to Control Diagnostic Messages Formatting}.
+@gccoptlist{-fmessage-length=@var{n}  @gol
+-fdiagnostics-show-location=@r{[}once@r{|}every-line@r{]}  @gol
+-fdiagnostics-show-option}
+
+@item Warning Options
+@xref{Warning Options,,Options to Request or Suppress Warnings}.
+@gccoptlist{-fsyntax-only  -pedantic  -pedantic-errors @gol
+-w  -Wextra  -Wall  -Waddress  -Waggregate-return  -Warray-bounds @gol
+-Wno-attributes -Wno-builtin-macro-redefined @gol
+-Wc++-compat -Wc++0x-compat -Wcast-align  -Wcast-qual  @gol
+-Wchar-subscripts -Wclobbered  -Wcomment @gol
+-Wconversion  -Wcoverage-mismatch  -Wno-deprecated  @gol
+-Wno-deprecated-declarations -Wdisabled-optimization  @gol
+-Wno-div-by-zero -Wempty-body  -Wenum-compare -Wno-endif-labels @gol
+-Werror  -Werror=* @gol
+-Wfatal-errors  -Wfloat-equal  -Wformat  -Wformat=2 @gol
+-Wno-format-contains-nul -Wno-format-extra-args -Wformat-nonliteral @gol
+-Wformat-security  -Wformat-y2k @gol
+-Wframe-larger-than=@var{len} -Wignored-qualifiers @gol
+-Wimplicit  -Wimplicit-function-declaration  -Wimplicit-int @gol
+-Winit-self  -Winline @gol
+-Wno-int-to-pointer-cast -Wno-invalid-offsetof @gol
+-Winvalid-pch -Wlarger-than=@var{len}  -Wunsafe-loop-optimizations @gol
+-Wlogical-op -Wlong-long @gol
+-Wmain  -Wmissing-braces  -Wmissing-field-initializers @gol
+-Wmissing-format-attribute  -Wmissing-include-dirs @gol
+-Wmissing-noreturn  -Wno-mudflap @gol
+-Wno-multichar  -Wnonnull  -Wno-overflow @gol
+-Woverlength-strings  -Wpacked  -Wpacked-bitfield-compat  -Wpadded @gol
+-Wparentheses  -Wpedantic-ms-format -Wno-pedantic-ms-format @gol
+-Wpointer-arith  -Wno-pointer-to-int-cast @gol
+-Wredundant-decls @gol
+-Wreturn-type  -Wsequence-point  -Wshadow @gol
+-Wsign-compare  -Wsign-conversion  -Wstack-protector @gol
+-Wstrict-aliasing -Wstrict-aliasing=n @gol
+-Wstrict-overflow -Wstrict-overflow=@var{n} @gol
+-Wswitch  -Wswitch-default  -Wswitch-enum -Wsync-nand @gol
+-Wsystem-headers  -Wtrigraphs  -Wtype-limits  -Wundef  -Wuninitialized @gol
+-Wunknown-pragmas  -Wno-pragmas -Wunreachable-code @gol
+-Wunused  -Wunused-function  -Wunused-label  -Wunused-parameter @gol
+-Wunused-value  -Wunused-variable @gol
+-Wvariadic-macros -Wvla @gol
+-Wvolatile-register-var  -Wwrite-strings}
+
+@item C and Objective-C-only Warning Options
+@gccoptlist{-Wbad-function-cast  -Wmissing-declarations @gol
+-Wmissing-parameter-type  -Wmissing-prototypes  -Wnested-externs @gol
+-Wold-style-declaration  -Wold-style-definition @gol
+-Wstrict-prototypes  -Wtraditional  -Wtraditional-conversion @gol
+-Wdeclaration-after-statement -Wpointer-sign}
+
+@item Debugging Options
+@xref{Debugging Options,,Options for Debugging Your Program or GCC}.
+@gccoptlist{-d@var{letters}  -dumpspecs  -dumpmachine  -dumpversion @gol
+-fdbg-cnt-list -fdbg-cnt=@var{counter-value-list} @gol
+-fdump-noaddr -fdump-unnumbered @gol
+-fdump-translation-unit@r{[}-@var{n}@r{]} @gol
+-fdump-class-hierarchy@r{[}-@var{n}@r{]} @gol
+-fdump-ipa-all -fdump-ipa-cgraph -fdump-ipa-inline @gol
+-fdump-statistics @gol
+-fdump-tree-all @gol
+-fdump-tree-original@r{[}-@var{n}@r{]}  @gol
+-fdump-tree-optimized@r{[}-@var{n}@r{]} @gol
+-fdump-tree-cfg -fdump-tree-vcg -fdump-tree-alias @gol
+-fdump-tree-ch @gol
+-fdump-tree-ssa@r{[}-@var{n}@r{]} -fdump-tree-pre@r{[}-@var{n}@r{]} @gol
+-fdump-tree-ccp@r{[}-@var{n}@r{]} -fdump-tree-dce@r{[}-@var{n}@r{]} @gol
+-fdump-tree-gimple@r{[}-raw@r{]} -fdump-tree-mudflap@r{[}-@var{n}@r{]} @gol
+-fdump-tree-dom@r{[}-@var{n}@r{]} @gol
+-fdump-tree-dse@r{[}-@var{n}@r{]} @gol
+-fdump-tree-phiopt@r{[}-@var{n}@r{]} @gol
+-fdump-tree-forwprop@r{[}-@var{n}@r{]} @gol
+-fdump-tree-copyrename@r{[}-@var{n}@r{]} @gol
+-fdump-tree-nrv -fdump-tree-vect @gol
+-fdump-tree-sink @gol
+-fdump-tree-sra@r{[}-@var{n}@r{]} @gol
+-fdump-tree-fre@r{[}-@var{n}@r{]} @gol
+-fdump-tree-vrp@r{[}-@var{n}@r{]} @gol
+-ftree-vectorizer-verbose=@var{n} @gol
+-fdump-tree-storeccp@r{[}-@var{n}@r{]} @gol
+-feliminate-dwarf2-dups -feliminate-unused-debug-types @gol
+-feliminate-unused-debug-symbols -femit-class-debug-always @gol
+-fmem-report -fpre-ipa-mem-report -fpost-ipa-mem-report -fprofile-arcs @gol
+-frandom-seed=@var{string} -fsched-verbose=@var{n} @gol
+-fsel-sched-verbose -fsel-sched-dump-cfg -fsel-sched-pipelining-verbose @gol
+-ftest-coverage  -ftime-report -fvar-tracking @gol
+-g  -g@var{level}  -gcoff -gdwarf-2 @gol
+-ggdb  -gstabs  -gstabs+  -gvms  -gxcoff  -gxcoff+ @gol
+-fno-merge-debug-strings -fno-dwarf2-cfi-asm @gol
+-fdebug-prefix-map=@var{old}=@var{new} @gol
+-femit-struct-debug-baseonly -femit-struct-debug-reduced @gol
+-femit-struct-debug-detailed@r{[}=@var{spec-list}@r{]} @gol
+-p  -pg  -print-file-name=@var{library}  -print-libgcc-file-name @gol
+-print-multi-directory  -print-multi-lib @gol
+-print-prog-name=@var{program}  -print-search-dirs  -Q @gol
+-print-sysroot -print-sysroot-headers-suffix @gol
+-save-temps  -time}
+
+@item Optimization Options
+@xref{Optimize Options,,Options that Control Optimization}.
+@gccoptlist{
+-falign-functions[=@var{n}] -falign-jumps[=@var{n}] @gol
+-falign-labels[=@var{n}] -falign-loops[=@var{n}] -fassociative-math @gol
+-fauto-inc-dec -fbranch-probabilities -fbranch-target-load-optimize @gol
+-fbranch-target-load-optimize2 -fbtr-bb-exclusive -fcaller-saves @gol
+-fcheck-data-deps -fconserve-stack -fcprop-registers -fcrossjumping @gol
+-fcse-follow-jumps -fcse-skip-blocks -fcx-fortran-rules -fcx-limited-range @gol
+-fdata-sections -fdce -fdce @gol
+-fdelayed-branch -fdelete-null-pointer-checks -fdse -fdse @gol
+-fearly-inlining -fexpensive-optimizations -ffast-math @gol
+-ffinite-math-only -ffloat-store -fforward-propagate @gol
+-ffunction-sections -fgcse -fgcse-after-reload -fgcse-las -fgcse-lm @gol
+-fgcse-sm -fif-conversion -fif-conversion2 -findirect-inlining @gol
+-finline-functions -finline-functions-called-once -finline-limit=@var{n} @gol
+-finline-small-functions -fipa-cp -fipa-cp-clone -fipa-matrix-reorg -fipa-pta @gol 
+-fipa-pure-const -fipa-reference -fipa-struct-reorg @gol
+-fipa-type-escape -fira-algorithm=@var{algorithm} @gol
+-fira-region=@var{region} -fira-coalesce -fno-ira-share-save-slots @gol
+-fno-ira-share-spill-slots -fira-verbose=@var{n} @gol
+-fivopts -fkeep-inline-functions -fkeep-static-consts @gol
+-floop-block -floop-interchange -floop-strip-mine @gol
+-fmerge-all-constants -fmerge-constants -fmodulo-sched @gol
+-fmodulo-sched-allow-regmoves -fmove-loop-invariants -fmudflap @gol
+-fmudflapir -fmudflapth -fno-branch-count-reg -fno-default-inline @gol
+-fno-defer-pop -fno-function-cse -fno-guess-branch-probability @gol
+-fno-inline -fno-math-errno -fno-peephole -fno-peephole2 @gol
+-fno-sched-interblock -fno-sched-spec -fno-signed-zeros @gol
+-fno-toplevel-reorder -fno-trapping-math -fno-zero-initialized-in-bss @gol
+-fomit-frame-pointer -foptimize-register-move -foptimize-sibling-calls @gol
+-fpeel-loops -fpredictive-commoning -fprefetch-loop-arrays @gol
+-fprofile-correction -fprofile-dir=@var{path} -fprofile-generate @gol
+-fprofile-generate=@var{path} @gol
+-fprofile-use -fprofile-use=@var{path} -fprofile-values @gol
+-freciprocal-math -fregmove -frename-registers -freorder-blocks @gol
+-freorder-blocks-and-partition -freorder-functions @gol
+-frerun-cse-after-loop -freschedule-modulo-scheduled-loops @gol
+-frounding-math -frtl-abstract-sequences -fsched2-use-superblocks @gol
+-fsched2-use-traces -fsched-spec-load -fsched-spec-load-dangerous @gol
+-fsched-stalled-insns-dep[=@var{n}] -fsched-stalled-insns[=@var{n}] @gol
+-fschedule-insns -fschedule-insns2 -fsection-anchors -fsee @gol
+-fselective-scheduling -fselective-scheduling2 @gol
+-fsel-sched-pipelining -fsel-sched-pipelining-outer-loops @gol
+-fsignaling-nans -fsingle-precision-constant -fsplit-ivs-in-unroller @gol
+-fsplit-wide-types -fstack-protector -fstack-protector-all @gol
+-fstrict-aliasing -fstrict-overflow -fthread-jumps -ftracer @gol
+-ftree-builtin-call-dce -ftree-ccp -ftree-ch -ftree-copy-prop @gol
+-ftree-copyrename -ftree-dce @gol
+-ftree-dominator-opts -ftree-dse -ftree-fre -ftree-loop-im @gol
+-ftree-loop-distribution @gol
+-ftree-loop-ivcanon -ftree-loop-linear -ftree-loop-optimize @gol
+-ftree-parallelize-loops=@var{n} -ftree-pre -ftree-reassoc @gol
+-ftree-sink -ftree-sra -ftree-switch-conversion @gol
+-ftree-ter -ftree-vect-loop-version -ftree-vectorize -ftree-vrp @gol
+-funit-at-a-time -funroll-all-loops -funroll-loops @gol
+-funsafe-loop-optimizations -funsafe-math-optimizations -funswitch-loops @gol
+-fvariable-expansion-in-unroller -fvect-cost-model -fvpt -fweb @gol
+-fwhole-program @gol
+--param @var{name}=@var{value}
+-O  -O0  -O1  -O2  -O3  -Os}
+
+@item Preprocessor Options
+@xref{Preprocessor Options,,Options Controlling the Preprocessor}.
+@gccoptlist{-A@var{question}=@var{answer} @gol
+-A-@var{question}@r{[}=@var{answer}@r{]} @gol
+-C  -dD  -dI  -dM  -dN @gol
+-D@var{macro}@r{[}=@var{defn}@r{]}  -E  -H @gol
+-idirafter @var{dir} @gol
+-include @var{file}  -imacros @var{file} @gol
+-iprefix @var{file}  -iwithprefix @var{dir} @gol
+-iwithprefixbefore @var{dir}  -isystem @var{dir} @gol
+-imultilib @var{dir} -isysroot @var{dir} @gol
+-M  -MM  -MF  -MG  -MP  -MQ  -MT  -nostdinc  @gol
+-P  -fworking-directory  -remap @gol
+-trigraphs  -undef  -U@var{macro}  -Wp,@var{option} @gol
+-Xpreprocessor @var{option}}
+
+@item Assembler Option
+@xref{Assembler Options,,Passing Options to the Assembler}.
+@gccoptlist{-Wa,@var{option}  -Xassembler @var{option}}
+
+@item Linker Options
+@xref{Link Options,,Options for Linking}.
+@gccoptlist{@var{object-file-name}  -l@var{library} @gol
+-nostartfiles  -nodefaultlibs  -nostdlib -pie -rdynamic @gol
+-s  -static  -static-libgcc  -shared  -shared-libgcc  -symbolic @gol
+-T @var{script}  -Wl,@var{option}  -Xlinker @var{option} @gol
+-u @var{symbol}}
+
+@item Directory Options
+@xref{Directory Options,,Options for Directory Search}.
+@gccoptlist{-B@var{prefix}  -I@var{dir}  -iquote@var{dir}  -L@var{dir}
+-specs=@var{file}  -I- --sysroot=@var{dir}}
+
+@item Target Options
+@c I wrote this xref this way to avoid overfull hbox. -- rms
+@xref{Target Options}.
+@gccoptlist{-V @var{version}  -b @var{machine}}
+
+@item Machine Dependent Options
+@xref{Submodel Options,,Hardware Models and Configurations}.
+@c This list is ordered alphanumerically by subsection name.
+@c Try and put the significant identifier (CPU or system) first,
+@c so users have a clue at guessing where the ones they want will be.
+
+@emph{ARC Options}
+@gccoptlist{-EB  -EL @gol
+-mmangle-cpu  -mcpu=@var{cpu}  -mtext=@var{text-section} @gol
+-mdata=@var{data-section}  -mrodata=@var{readonly-data-section}}
+
+@emph{ARM Options}
+@gccoptlist{-mapcs-frame  -mno-apcs-frame @gol
+-mabi=@var{name} @gol
+-mapcs-stack-check  -mno-apcs-stack-check @gol
+-mapcs-float  -mno-apcs-float @gol
+-mapcs-reentrant  -mno-apcs-reentrant @gol
+-msched-prolog  -mno-sched-prolog @gol
+-mlittle-endian  -mbig-endian  -mwords-little-endian @gol
+-mfloat-abi=@var{name}  -msoft-float  -mhard-float  -mfpe @gol
+-mthumb-interwork  -mno-thumb-interwork @gol
+-mcpu=@var{name}  -march=@var{name}  -mfpu=@var{name}  @gol
+-mstructure-size-boundary=@var{n} @gol
+-mabort-on-noreturn @gol
+-mlong-calls  -mno-long-calls @gol
+-msingle-pic-base  -mno-single-pic-base @gol
+-mpic-register=@var{reg} @gol
+-mnop-fun-dllimport @gol
+-mcirrus-fix-invalid-insns -mno-cirrus-fix-invalid-insns @gol
+-mpoke-function-name @gol
+-mthumb  -marm @gol
+-mtpcs-frame  -mtpcs-leaf-frame @gol
+-mcaller-super-interworking  -mcallee-super-interworking @gol
+-mtp=@var{name} @gol
+-mword-relocations @gol
+-mfix-cortex-m3-ldrd}
+
+@emph{AVR Options}
+@gccoptlist{-mmcu=@var{mcu}  -msize  -mno-interrupts @gol
+-mcall-prologues  -mno-tablejump  -mtiny-stack  -mint8}
+
+@emph{Blackfin Options}
+@gccoptlist{-mcpu=@var{cpu}@r{[}-@var{sirevision}@r{]} @gol
+-msim -momit-leaf-frame-pointer  -mno-omit-leaf-frame-pointer @gol
+-mspecld-anomaly  -mno-specld-anomaly  -mcsync-anomaly  -mno-csync-anomaly @gol
+-mlow-64k -mno-low64k  -mstack-check-l1  -mid-shared-library @gol
+-mno-id-shared-library  -mshared-library-id=@var{n} @gol
+-mleaf-id-shared-library  -mno-leaf-id-shared-library @gol
+-msep-data  -mno-sep-data  -mlong-calls  -mno-long-calls @gol
+-mfast-fp -minline-plt -mmulticore  -mcorea  -mcoreb  -msdram @gol
+-micplb}
+
+@emph{CRIS Options}
+@gccoptlist{-mcpu=@var{cpu}  -march=@var{cpu}  -mtune=@var{cpu} @gol
+-mmax-stack-frame=@var{n}  -melinux-stacksize=@var{n} @gol
+-metrax4  -metrax100  -mpdebug  -mcc-init  -mno-side-effects @gol
+-mstack-align  -mdata-align  -mconst-align @gol
+-m32-bit  -m16-bit  -m8-bit  -mno-prologue-epilogue  -mno-gotplt @gol
+-melf  -maout  -melinux  -mlinux  -sim  -sim2 @gol
+-mmul-bug-workaround  -mno-mul-bug-workaround}
+
+@emph{CRX Options}
+@gccoptlist{-mmac -mpush-args}
+
+@emph{Darwin Options}
+@gccoptlist{-all_load  -allowable_client  -arch  -arch_errors_fatal @gol
+-arch_only  -bind_at_load  -bundle  -bundle_loader @gol
+-client_name  -compatibility_version  -current_version @gol
+-dead_strip @gol
+-dependency-file  -dylib_file  -dylinker_install_name @gol
+-dynamic  -dynamiclib  -exported_symbols_list @gol
+-filelist  -flat_namespace  -force_cpusubtype_ALL @gol
+-force_flat_namespace  -headerpad_max_install_names @gol
+-iframework @gol
+-image_base  -init  -install_name  -keep_private_externs @gol
+-multi_module  -multiply_defined  -multiply_defined_unused @gol
+-noall_load   -no_dead_strip_inits_and_terms @gol
+-nofixprebinding -nomultidefs  -noprebind  -noseglinkedit @gol
+-pagezero_size  -prebind  -prebind_all_twolevel_modules @gol
+-private_bundle  -read_only_relocs  -sectalign @gol
+-sectobjectsymbols  -whyload  -seg1addr @gol
+-sectcreate  -sectobjectsymbols  -sectorder @gol
+-segaddr -segs_read_only_addr -segs_read_write_addr @gol
+-seg_addr_table  -seg_addr_table_filename  -seglinkedit @gol
+-segprot  -segs_read_only_addr  -segs_read_write_addr @gol
+-single_module  -static  -sub_library  -sub_umbrella @gol
+-twolevel_namespace  -umbrella  -undefined @gol
+-unexported_symbols_list  -weak_reference_mismatches @gol
+-whatsloaded -F -gused -gfull -mmacosx-version-min=@var{version} @gol
+-mkernel -mone-byte-bool}
+
+@emph{DEC Alpha Options}
+@gccoptlist{-mno-fp-regs  -msoft-float  -malpha-as  -mgas @gol
+-mieee  -mieee-with-inexact  -mieee-conformant @gol
+-mfp-trap-mode=@var{mode}  -mfp-rounding-mode=@var{mode} @gol
+-mtrap-precision=@var{mode}  -mbuild-constants @gol
+-mcpu=@var{cpu-type}  -mtune=@var{cpu-type} @gol
+-mbwx  -mmax  -mfix  -mcix @gol
+-mfloat-vax  -mfloat-ieee @gol
+-mexplicit-relocs  -msmall-data  -mlarge-data @gol
+-msmall-text  -mlarge-text @gol
+-mmemory-latency=@var{time}}
+
+@emph{DEC Alpha/VMS Options}
+@gccoptlist{-mvms-return-codes}
+
+@emph{FR30 Options}
+@gccoptlist{-msmall-model -mno-lsim}
+
+@emph{FRV Options}
+@gccoptlist{-mgpr-32  -mgpr-64  -mfpr-32  -mfpr-64 @gol
+-mhard-float  -msoft-float @gol
+-malloc-cc  -mfixed-cc  -mdword  -mno-dword @gol
+-mdouble  -mno-double @gol
+-mmedia  -mno-media  -mmuladd  -mno-muladd @gol
+-mfdpic  -minline-plt -mgprel-ro  -multilib-library-pic @gol
+-mlinked-fp  -mlong-calls  -malign-labels @gol
+-mlibrary-pic  -macc-4  -macc-8 @gol
+-mpack  -mno-pack  -mno-eflags  -mcond-move  -mno-cond-move @gol
+-moptimize-membar -mno-optimize-membar @gol
+-mscc  -mno-scc  -mcond-exec  -mno-cond-exec @gol
+-mvliw-branch  -mno-vliw-branch @gol
+-mmulti-cond-exec  -mno-multi-cond-exec  -mnested-cond-exec @gol
+-mno-nested-cond-exec  -mtomcat-stats @gol
+-mTLS -mtls @gol
+-mcpu=@var{cpu}}
+
+@emph{GNU/Linux Options}
+@gccoptlist{-muclibc}
+
+@emph{H8/300 Options}
+@gccoptlist{-mrelax  -mh  -ms  -mn  -mint32  -malign-300}
+
+@emph{HPPA Options}
+@gccoptlist{-march=@var{architecture-type} @gol
+-mbig-switch  -mdisable-fpregs  -mdisable-indexing @gol
+-mfast-indirect-calls  -mgas  -mgnu-ld   -mhp-ld @gol
+-mfixed-range=@var{register-range} @gol
+-mjump-in-delay -mlinker-opt -mlong-calls @gol
+-mlong-load-store  -mno-big-switch  -mno-disable-fpregs @gol
+-mno-disable-indexing  -mno-fast-indirect-calls  -mno-gas @gol
+-mno-jump-in-delay  -mno-long-load-store @gol
+-mno-portable-runtime  -mno-soft-float @gol
+-mno-space-regs  -msoft-float  -mpa-risc-1-0 @gol
+-mpa-risc-1-1  -mpa-risc-2-0  -mportable-runtime @gol
+-mschedule=@var{cpu-type}  -mspace-regs  -msio  -mwsio @gol
+-munix=@var{unix-std}  -nolibdld  -static  -threads}
+
+@emph{i386 and x86-64 Options}
+@gccoptlist{-mtune=@var{cpu-type}  -march=@var{cpu-type} @gol
+-mfpmath=@var{unit} @gol
+-masm=@var{dialect}  -mno-fancy-math-387 @gol
+-mno-fp-ret-in-387  -msoft-float @gol
+-mno-wide-multiply  -mrtd  -malign-double @gol
+-mpreferred-stack-boundary=@var{num}
+-mincoming-stack-boundary=@var{num}
+-mcld -mcx16 -msahf -mrecip @gol
+-mmmx  -msse  -msse2 -msse3 -mssse3 -msse4.1 -msse4.2 -msse4 -mavx @gol
+-maes -mpclmul @gol
+-msse4a -m3dnow -mpopcnt -mabm -msse5 @gol
+-mthreads  -mno-align-stringops  -minline-all-stringops @gol
+-minline-stringops-dynamically -mstringop-strategy=@var{alg} @gol
+-mpush-args  -maccumulate-outgoing-args  -m128bit-long-double @gol
+-m96bit-long-double  -mregparm=@var{num}  -msseregparm @gol
+-mveclibabi=@var{type} -mpc32 -mpc64 -mpc80 -mstackrealign @gol
+-momit-leaf-frame-pointer  -mno-red-zone -mno-tls-direct-seg-refs @gol
+-mcmodel=@var{code-model} @gol
+-m32  -m64 -mlarge-data-threshold=@var{num} @gol
+-mfused-madd -mno-fused-madd -msse2avx}
+
+@emph{IA-64 Options}
+@gccoptlist{-mbig-endian  -mlittle-endian  -mgnu-as  -mgnu-ld  -mno-pic @gol
+-mvolatile-asm-stop  -mregister-names  -mno-sdata @gol
+-mconstant-gp  -mauto-pic  -minline-float-divide-min-latency @gol
+-minline-float-divide-max-throughput @gol
+-minline-int-divide-min-latency @gol
+-minline-int-divide-max-throughput  @gol
+-minline-sqrt-min-latency -minline-sqrt-max-throughput @gol
+-mno-dwarf2-asm -mearly-stop-bits @gol
+-mfixed-range=@var{register-range} -mtls-size=@var{tls-size} @gol
+-mtune=@var{cpu-type} -mt -pthread -milp32 -mlp64 @gol
+-mno-sched-br-data-spec -msched-ar-data-spec -mno-sched-control-spec @gol
+-msched-br-in-data-spec -msched-ar-in-data-spec -msched-in-control-spec @gol
+-msched-ldc -mno-sched-control-ldc -mno-sched-spec-verbose @gol
+-mno-sched-prefer-non-data-spec-insns @gol
+-mno-sched-prefer-non-control-spec-insns @gol
+-mno-sched-count-spec-in-critical-path}
+
+@emph{M32R/D Options}
+@gccoptlist{-m32r2 -m32rx -m32r @gol
+-mdebug @gol
+-malign-loops -mno-align-loops @gol
+-missue-rate=@var{number} @gol
+-mbranch-cost=@var{number} @gol
+-mmodel=@var{code-size-model-type} @gol
+-msdata=@var{sdata-type} @gol
+-mno-flush-func -mflush-func=@var{name} @gol
+-mno-flush-trap -mflush-trap=@var{number} @gol
+-G @var{num}}
+
+@emph{M32C Options}
+@gccoptlist{-mcpu=@var{cpu} -msim -memregs=@var{number}}
+
+@emph{M680x0 Options}
+@gccoptlist{-march=@var{arch}  -mcpu=@var{cpu}  -mtune=@var{tune}
+-m68000  -m68020  -m68020-40  -m68020-60  -m68030  -m68040 @gol
+-m68060  -mcpu32  -m5200  -m5206e  -m528x  -m5307  -m5407 @gol
+-mcfv4e  -mbitfield  -mno-bitfield  -mc68000  -mc68020 @gol
+-mnobitfield  -mrtd  -mno-rtd  -mdiv  -mno-div  -mshort @gol
+-mno-short  -mhard-float  -m68881  -msoft-float  -mpcrel @gol
+-malign-int  -mstrict-align  -msep-data  -mno-sep-data @gol
+-mshared-library-id=n  -mid-shared-library  -mno-id-shared-library @gol
+-mxgot -mno-xgot}
+
+@emph{M68hc1x Options}
+@gccoptlist{-m6811  -m6812  -m68hc11  -m68hc12   -m68hcs12 @gol
+-mauto-incdec  -minmax  -mlong-calls  -mshort @gol
+-msoft-reg-count=@var{count}}
+
+@emph{MCore Options}
+@gccoptlist{-mhardlit  -mno-hardlit  -mdiv  -mno-div  -mrelax-immediates @gol
+-mno-relax-immediates  -mwide-bitfields  -mno-wide-bitfields @gol
+-m4byte-functions  -mno-4byte-functions  -mcallgraph-data @gol
+-mno-callgraph-data  -mslow-bytes  -mno-slow-bytes  -mno-lsim @gol
+-mlittle-endian  -mbig-endian  -m210  -m340  -mstack-increment}
+
+@emph{MIPS Options}
+@gccoptlist{-EL  -EB  -march=@var{arch}  -mtune=@var{arch} @gol
+-mips1  -mips2  -mips3  -mips4  -mips32  -mips32r2 @gol
+-mips64  -mips64r2 @gol
+-mips16  -mno-mips16  -mflip-mips16 @gol
+-minterlink-mips16  -mno-interlink-mips16 @gol
+-mabi=@var{abi}  -mabicalls  -mno-abicalls @gol
+-mshared  -mno-shared  -mplt  -mno-plt  -mxgot  -mno-xgot @gol
+-mgp32  -mgp64  -mfp32  -mfp64  -mhard-float  -msoft-float @gol
+-msingle-float  -mdouble-float  -mdsp  -mno-dsp  -mdspr2  -mno-dspr2 @gol
+-mfpu=@var{fpu-type} @gol
+-msmartmips  -mno-smartmips @gol
+-mpaired-single  -mno-paired-single  -mdmx  -mno-mdmx @gol
+-mips3d  -mno-mips3d  -mmt  -mno-mt  -mllsc  -mno-llsc @gol
+-mlong64  -mlong32  -msym32  -mno-sym32 @gol
+-G@var{num}  -mlocal-sdata  -mno-local-sdata @gol
+-mextern-sdata  -mno-extern-sdata  -mgpopt  -mno-gopt @gol
+-membedded-data  -mno-embedded-data @gol
+-muninit-const-in-rodata  -mno-uninit-const-in-rodata @gol
+-mcode-readable=@var{setting} @gol
+-msplit-addresses  -mno-split-addresses @gol
+-mexplicit-relocs  -mno-explicit-relocs @gol
+-mcheck-zero-division  -mno-check-zero-division @gol
+-mdivide-traps  -mdivide-breaks @gol
+-mmemcpy  -mno-memcpy  -mlong-calls  -mno-long-calls @gol
+-mmad  -mno-mad  -mfused-madd  -mno-fused-madd  -nocpp @gol
+-mfix-r4000  -mno-fix-r4000  -mfix-r4400  -mno-fix-r4400 @gol
+-mfix-r10000 -mno-fix-r10000  -mfix-vr4120  -mno-fix-vr4120 @gol
+-mfix-vr4130  -mno-fix-vr4130  -mfix-sb1  -mno-fix-sb1 @gol
+-mflush-func=@var{func}  -mno-flush-func @gol
+-mbranch-cost=@var{num}  -mbranch-likely  -mno-branch-likely @gol
+-mfp-exceptions -mno-fp-exceptions @gol
+-mvr4130-align -mno-vr4130-align}
+
+@emph{MMIX Options}
+@gccoptlist{-mlibfuncs  -mno-libfuncs  -mepsilon  -mno-epsilon  -mabi=gnu @gol
+-mabi=mmixware  -mzero-extend  -mknuthdiv  -mtoplevel-symbols @gol
+-melf  -mbranch-predict  -mno-branch-predict  -mbase-addresses @gol
+-mno-base-addresses  -msingle-exit  -mno-single-exit}
+
+@emph{MN10300 Options}
+@gccoptlist{-mmult-bug  -mno-mult-bug @gol
+-mam33  -mno-am33 @gol
+-mam33-2  -mno-am33-2 @gol
+-mreturn-pointer-on-d0 @gol
+-mno-crt0  -mrelax}
+
+@emph{PDP-11 Options}
+@gccoptlist{-mfpu  -msoft-float  -mac0  -mno-ac0  -m40  -m45  -m10 @gol
+-mbcopy  -mbcopy-builtin  -mint32  -mno-int16 @gol
+-mint16  -mno-int32  -mfloat32  -mno-float64 @gol
+-mfloat64  -mno-float32  -mabshi  -mno-abshi @gol
+-mbranch-expensive  -mbranch-cheap @gol
+-msplit  -mno-split  -munix-asm  -mdec-asm}
+
+@emph{picoChip Options}
+@gccoptlist{-mae=@var{ae_type} -mvliw-lookahead=@var{N}
+-msymbol-as-address -mno-inefficient-warnings}
+
+@emph{PowerPC Options}
+See RS/6000 and PowerPC Options.
+
+@emph{RS/6000 and PowerPC Options}
+@gccoptlist{-mcpu=@var{cpu-type} @gol
+-mtune=@var{cpu-type} @gol
+-mpower  -mno-power  -mpower2  -mno-power2 @gol
+-mpowerpc  -mpowerpc64  -mno-powerpc @gol
+-maltivec  -mno-altivec @gol
+-mpowerpc-gpopt  -mno-powerpc-gpopt @gol
+-mpowerpc-gfxopt  -mno-powerpc-gfxopt @gol
+-mmfcrf  -mno-mfcrf  -mpopcntb  -mno-popcntb  -mfprnd  -mno-fprnd @gol
+-mcmpb -mno-cmpb -mmfpgpr -mno-mfpgpr -mhard-dfp -mno-hard-dfp @gol
+-mnew-mnemonics  -mold-mnemonics @gol
+-mfull-toc   -mminimal-toc  -mno-fp-in-toc  -mno-sum-in-toc @gol
+-m64  -m32  -mxl-compat  -mno-xl-compat  -mpe @gol
+-malign-power  -malign-natural @gol
+-msoft-float  -mhard-float  -mmultiple  -mno-multiple @gol
+-msingle-float -mdouble-float -msimple-fpu @gol
+-mstring  -mno-string  -mupdate  -mno-update @gol
+-mavoid-indexed-addresses  -mno-avoid-indexed-addresses @gol
+-mfused-madd  -mno-fused-madd  -mbit-align  -mno-bit-align @gol
+-mstrict-align  -mno-strict-align  -mrelocatable @gol
+-mno-relocatable  -mrelocatable-lib  -mno-relocatable-lib @gol
+-mtoc  -mno-toc  -mlittle  -mlittle-endian  -mbig  -mbig-endian @gol
+-mdynamic-no-pic  -maltivec  -mswdiv @gol
+-mprioritize-restricted-insns=@var{priority} @gol
+-msched-costly-dep=@var{dependence_type} @gol
+-minsert-sched-nops=@var{scheme} @gol
+-mcall-sysv  -mcall-netbsd @gol
+-maix-struct-return  -msvr4-struct-return @gol
+-mabi=@var{abi-type} -msecure-plt -mbss-plt @gol
+-misel -mno-isel @gol
+-misel=yes  -misel=no @gol
+-mspe -mno-spe @gol
+-mspe=yes  -mspe=no @gol
+-mpaired @gol
+-mgen-cell-microcode -mwarn-cell-microcode @gol
+-mvrsave -mno-vrsave @gol
+-mmulhw -mno-mulhw @gol
+-mdlmzb -mno-dlmzb @gol
+-mfloat-gprs=yes  -mfloat-gprs=no -mfloat-gprs=single -mfloat-gprs=double @gol
+-mprototype  -mno-prototype @gol
+-msim  -mmvme  -mads  -myellowknife  -memb  -msdata @gol
+-msdata=@var{opt}  -mvxworks  -G @var{num}  -pthread}
+
+@emph{S/390 and zSeries Options}
+@gccoptlist{-mtune=@var{cpu-type}  -march=@var{cpu-type} @gol
+-mhard-float  -msoft-float  -mhard-dfp -mno-hard-dfp @gol
+-mlong-double-64 -mlong-double-128 @gol
+-mbackchain  -mno-backchain -mpacked-stack  -mno-packed-stack @gol
+-msmall-exec  -mno-small-exec  -mmvcle -mno-mvcle @gol
+-m64  -m31  -mdebug  -mno-debug  -mesa  -mzarch @gol
+-mtpf-trace -mno-tpf-trace  -mfused-madd  -mno-fused-madd @gol
+-mwarn-framesize  -mwarn-dynamicstack  -mstack-size -mstack-guard}
+
+@emph{Score Options}
+@gccoptlist{-meb -mel @gol
+-mnhwloop @gol
+-muls @gol
+-mmac @gol
+-mscore5 -mscore5u -mscore7 -mscore7d}
+
+@emph{SH Options}
+@gccoptlist{-m1  -m2  -m2e  -m3  -m3e @gol
+-m4-nofpu  -m4-single-only  -m4-single  -m4 @gol
+-m4a-nofpu -m4a-single-only -m4a-single -m4a -m4al @gol
+-m5-64media  -m5-64media-nofpu @gol
+-m5-32media  -m5-32media-nofpu @gol
+-m5-compact  -m5-compact-nofpu @gol
+-mb  -ml  -mdalign  -mrelax @gol
+-mbigtable  -mfmovd  -mhitachi -mrenesas -mno-renesas -mnomacsave @gol
+-mieee  -mbitops  -misize  -minline-ic_invalidate -mpadstruct  -mspace @gol
+-mprefergot  -musermode -multcost=@var{number} -mdiv=@var{strategy} @gol
+-mdivsi3_libfunc=@var{name} -mfixed-range=@var{register-range} @gol
+-madjust-unroll -mindexed-addressing -mgettrcost=@var{number} -mpt-fixed @gol
+-minvalid-symbols}
+
+@emph{SPARC Options}
+@gccoptlist{-mcpu=@var{cpu-type} @gol
+-mtune=@var{cpu-type} @gol
+-mcmodel=@var{code-model} @gol
+-m32  -m64  -mapp-regs  -mno-app-regs @gol
+-mfaster-structs  -mno-faster-structs @gol
+-mfpu  -mno-fpu  -mhard-float  -msoft-float @gol
+-mhard-quad-float  -msoft-quad-float @gol
+-mimpure-text  -mno-impure-text  -mlittle-endian @gol
+-mstack-bias  -mno-stack-bias @gol
+-munaligned-doubles  -mno-unaligned-doubles @gol
+-mv8plus  -mno-v8plus  -mvis  -mno-vis
+-threads -pthreads -pthread}
+
+@emph{SPU Options}
+@gccoptlist{-mwarn-reloc -merror-reloc @gol
+-msafe-dma -munsafe-dma @gol
+-mbranch-hints @gol
+-msmall-mem -mlarge-mem -mstdmain @gol
+-mfixed-range=@var{register-range}}
+
+@emph{System V Options}
+@gccoptlist{-Qy  -Qn  -YP,@var{paths}  -Ym,@var{dir}}
+
+@emph{V850 Options}
+@gccoptlist{-mlong-calls  -mno-long-calls  -mep  -mno-ep @gol
+-mprolog-function  -mno-prolog-function  -mspace @gol
+-mtda=@var{n}  -msda=@var{n}  -mzda=@var{n} @gol
+-mapp-regs  -mno-app-regs @gol
+-mdisable-callt  -mno-disable-callt @gol
+-mv850e1 @gol
+-mv850e @gol
+-mv850  -mbig-switch}
+
+@emph{VAX Options}
+@gccoptlist{-mg  -mgnu  -munix}
+
+@emph{VxWorks Options}
+@gccoptlist{-mrtp  -non-static  -Bstatic  -Bdynamic @gol
+-Xbind-lazy  -Xbind-now}
+
+@emph{x86-64 Options}
+See i386 and x86-64 Options.
+
+@emph{i386 and x86-64 Windows Options}
+@gccoptlist{-mconsole -mcygwin -mno-cygwin -mdll
+-mnop-fun-dllimport -mthread -mwin32 -mwindows}
+
+@emph{Xstormy16 Options}
+@gccoptlist{-msim}
+
+@emph{Xtensa Options}
+@gccoptlist{-mconst16 -mno-const16 @gol
+-mfused-madd  -mno-fused-madd @gol
+-mserialize-volatile  -mno-serialize-volatile @gol
+-mtext-section-literals  -mno-text-section-literals @gol
+-mtarget-align  -mno-target-align @gol
+-mlongcalls  -mno-longcalls}
+
+@emph{zSeries Options}
+See S/390 and zSeries Options.
+
+@item Code Generation Options
+@xref{Code Gen Options,,Options for Code Generation Conventions}.
+@gccoptlist{-fcall-saved-@var{reg}  -fcall-used-@var{reg} @gol
+-ffixed-@var{reg}  -fexceptions @gol
+-fnon-call-exceptions  -funwind-tables @gol
+-fasynchronous-unwind-tables @gol
+-finhibit-size-directive  -finstrument-functions @gol
+-finstrument-functions-exclude-function-list=@var{sym},@var{sym},@dots{} @gol
+-finstrument-functions-exclude-file-list=@var{file},@var{file},@dots{} @gol
+-fno-common  -fno-ident @gol
+-fpcc-struct-return  -fpic  -fPIC -fpie -fPIE @gol
+-fno-jump-tables @gol
+-frecord-gcc-switches @gol
+-freg-struct-return  -fshort-enums @gol
+-fshort-double  -fshort-wchar @gol
+-fverbose-asm  -fpack-struct[=@var{n}]  -fstack-check @gol
+-fstack-limit-register=@var{reg}  -fstack-limit-symbol=@var{sym} @gol
+-fno-stack-limit  -fargument-alias  -fargument-noalias @gol
+-fargument-noalias-global  -fargument-noalias-anything @gol
+-fleading-underscore  -ftls-model=@var{model} @gol
+-ftrapv  -fwrapv  -fbounds-check @gol
+-fvisibility}
+@end table
+
+@menu
+* Overall Options::     Controlling the kind of output:
+                        an executable, object files, assembler files,
+                        or preprocessed source.
+* C Dialect Options::   Controlling the variant of C language compiled.
+* C++ Dialect Options:: Variations on C++.
+* Objective-C and Objective-C++ Dialect Options:: Variations on Objective-C
+                        and Objective-C++.
+* Language Independent Options:: Controlling how diagnostics should be
+                        formatted.
+* Warning Options::     How picky should the compiler be?
+* Debugging Options::   Symbol tables, measurements, and debugging dumps.
+* Optimize Options::    How much optimization?
+* Preprocessor Options:: Controlling header files and macro definitions.
+                         Also, getting dependency information for Make.
+* Assembler Options::   Passing options to the assembler.
+* Link Options::        Specifying libraries and so on.
+* Directory Options::   Where to find header files and libraries.
+                        Where to find the compiler executable files.
+* Spec Files::          How to pass switches to sub-processes.
+* Target Options::      Running a cross-compiler, or an old version of GCC.
+@end menu
+
+@node Overall Options
+@section Options Controlling the Kind of Output
+
+Compilation can involve up to four stages: preprocessing, compilation
+proper, assembly and linking, always in that order.  GCC is capable of
+preprocessing and compiling several files either into several
+assembler input files, or into one assembler input file; then each
+assembler input file produces an object file, and linking combines all
+the object files (those newly compiled, and those specified as input)
+into an executable file.
+
+@cindex file name suffix
+For any given input file, the file name suffix determines what kind of
+compilation is done:
+
+@table @gcctabopt
+@item @var{file}.c
+C source code which must be preprocessed.
+
+@item @var{file}.i
+C source code which should not be preprocessed.
+
+@item @var{file}.ii
+C++ source code which should not be preprocessed.
+
+@item @var{file}.m
+Objective-C source code.  Note that you must link with the @file{libobjc}
+library to make an Objective-C program work.
+
+@item @var{file}.mi
+Objective-C source code which should not be preprocessed.
+
+@item @var{file}.mm
+@itemx @var{file}.M
+Objective-C++ source code.  Note that you must link with the @file{libobjc}
+library to make an Objective-C++ program work.  Note that @samp{.M} refers
+to a literal capital M@.
+
+@item @var{file}.mii
+Objective-C++ source code which should not be preprocessed.
+
+@item @var{file}.h
+C, C++, Objective-C or Objective-C++ header file to be turned into a
+precompiled header.
+
+@item @var{file}.cc
+@itemx @var{file}.cp
+@itemx @var{file}.cxx
+@itemx @var{file}.cpp
+@itemx @var{file}.CPP
+@itemx @var{file}.c++
+@itemx @var{file}.C
+C++ source code which must be preprocessed.  Note that in @samp{.cxx},
+the last two letters must both be literally @samp{x}.  Likewise,
+@samp{.C} refers to a literal capital C@.
+
+@item @var{file}.mm
+@itemx @var{file}.M
+Objective-C++ source code which must be preprocessed.
+
+@item @var{file}.mii
+Objective-C++ source code which should not be preprocessed.
+
+@item @var{file}.hh
+@itemx @var{file}.H
+@itemx @var{file}.hp
+@itemx @var{file}.hxx
+@itemx @var{file}.hpp
+@itemx @var{file}.HPP
+@itemx @var{file}.h++
+@itemx @var{file}.tcc
+C++ header file to be turned into a precompiled header.
+
+@item @var{file}.f
+@itemx @var{file}.for
+@itemx @var{file}.ftn
+Fixed form Fortran source code which should not be preprocessed.
+
+@item @var{file}.F
+@itemx @var{file}.FOR
+@itemx @var{file}.fpp
+@itemx @var{file}.FPP
+@itemx @var{file}.FTN
+Fixed form Fortran source code which must be preprocessed (with the traditional
+preprocessor).
+
+@item @var{file}.f90
+@itemx @var{file}.f95
+@itemx @var{file}.f03
+@itemx @var{file}.f08
+Free form Fortran source code which should not be preprocessed.
+
+@item @var{file}.F90
+@itemx @var{file}.F95
+@itemx @var{file}.F03
+@itemx @var{file}.F08
+Free form Fortran source code which must be preprocessed (with the
+traditional preprocessor).
+
+@c FIXME: Descriptions of Java file types.
+@c @var{file}.java
+@c @var{file}.class
+@c @var{file}.zip
+@c @var{file}.jar
+
+@item @var{file}.ads
+Ada source code file which contains a library unit declaration (a
+declaration of a package, subprogram, or generic, or a generic
+instantiation), or a library unit renaming declaration (a package,
+generic, or subprogram renaming declaration).  Such files are also
+called @dfn{specs}.
+
+@item @var{file}.adb
+Ada source code file containing a library unit body (a subprogram or
+package body).  Such files are also called @dfn{bodies}.
+
+@c GCC also knows about some suffixes for languages not yet included:
+@c Pascal:
+@c @var{file}.p
+@c @var{file}.pas
+@c Ratfor:
+@c @var{file}.r
+
+@item @var{file}.s
+Assembler code.
+
+@item @var{file}.S
+@itemx @var{file}.sx
+Assembler code which must be preprocessed.
+
+@item @var{other}
+An object file to be fed straight into linking.
+Any file name with no recognized suffix is treated this way.
+@end table
+
+@opindex x
+You can specify the input language explicitly with the @option{-x} option:
+
+@table @gcctabopt
+@item -x @var{language}
+Specify explicitly the @var{language} for the following input files
+(rather than letting the compiler choose a default based on the file
+name suffix).  This option applies to all following input files until
+the next @option{-x} option.  Possible values for @var{language} are:
+@smallexample
+c  c-header  c-cpp-output
+c++  c++-header  c++-cpp-output
+objective-c  objective-c-header  objective-c-cpp-output
+objective-c++ objective-c++-header objective-c++-cpp-output
+assembler  assembler-with-cpp
+ada
+f77  f77-cpp-input f95  f95-cpp-input
+java
+@end smallexample
+
+@item -x none
+Turn off any specification of a language, so that subsequent files are
+handled according to their file name suffixes (as they are if @option{-x}
+has not been used at all).
+
+@item -pass-exit-codes
+@opindex pass-exit-codes
+Normally the @command{gcc} program will exit with the code of 1 if any
+phase of the compiler returns a non-success return code.  If you specify
+@option{-pass-exit-codes}, the @command{gcc} program will instead return with
+numerically highest error produced by any phase that returned an error
+indication.  The C, C++, and Fortran frontends return 4, if an internal
+compiler error is encountered.
+@end table
+
+If you only want some of the stages of compilation, you can use
+@option{-x} (or filename suffixes) to tell @command{gcc} where to start, and
+one of the options @option{-c}, @option{-S}, or @option{-E} to say where
+@command{gcc} is to stop.  Note that some combinations (for example,
+@samp{-x cpp-output -E}) instruct @command{gcc} to do nothing at all.
+
+@table @gcctabopt
+@item -c
+@opindex c
+Compile or assemble the source files, but do not link.  The linking
+stage simply is not done.  The ultimate output is in the form of an
+object file for each source file.
+
+By default, the object file name for a source file is made by replacing
+the suffix @samp{.c}, @samp{.i}, @samp{.s}, etc., with @samp{.o}.
+
+Unrecognized input files, not requiring compilation or assembly, are
+ignored.
+
+@item -S
+@opindex S
+Stop after the stage of compilation proper; do not assemble.  The output
+is in the form of an assembler code file for each non-assembler input
+file specified.
+
+By default, the assembler file name for a source file is made by
+replacing the suffix @samp{.c}, @samp{.i}, etc., with @samp{.s}.
+
+Input files that don't require compilation are ignored.
+
+@item -E
+@opindex E
+Stop after the preprocessing stage; do not run the compiler proper.  The
+output is in the form of preprocessed source code, which is sent to the
+standard output.
+
+Input files which don't require preprocessing are ignored.
+
+@cindex output file option
+@item -o @var{file}
+@opindex o
+Place output in file @var{file}.  This applies regardless to whatever
+sort of output is being produced, whether it be an executable file,
+an object file, an assembler file or preprocessed C code.
+
+If @option{-o} is not specified, the default is to put an executable
+file in @file{a.out}, the object file for
+@file{@var{source}.@var{suffix}} in @file{@var{source}.o}, its
+assembler file in @file{@var{source}.s}, a precompiled header file in
+@file{@var{source}.@var{suffix}.gch}, and all preprocessed C source on
+standard output.
+
+@item -v
+@opindex v
+Print (on standard error output) the commands executed to run the stages
+of compilation.  Also print the version number of the compiler driver
+program and of the preprocessor and the compiler proper.
+
+@item -###
+@opindex ###
+Like @option{-v} except the commands are not executed and all command
+arguments are quoted.  This is useful for shell scripts to capture the
+driver-generated command lines.
+
+@item -pipe
+@opindex pipe
+Use pipes rather than temporary files for communication between the
+various stages of compilation.  This fails to work on some systems where
+the assembler is unable to read from a pipe; but the GNU assembler has
+no trouble.
+
+@item -combine
+@opindex combine
+If you are compiling multiple source files, this option tells the driver
+to pass all the source files to the compiler at once (for those
+languages for which the compiler can handle this).  This will allow
+intermodule analysis (IMA) to be performed by the compiler.  Currently the only
+language for which this is supported is C@.  If you pass source files for
+multiple languages to the driver, using this option, the driver will invoke
+the compiler(s) that support IMA once each, passing each compiler all the
+source files appropriate for it.  For those languages that do not support
+IMA this option will be ignored, and the compiler will be invoked once for
+each source file in that language.  If you use this option in conjunction
+with @option{-save-temps}, the compiler will generate multiple
+pre-processed files
+(one for each source file), but only one (combined) @file{.o} or
+@file{.s} file.
+
+@item --help
+@opindex help
+Print (on the standard output) a description of the command line options
+understood by @command{gcc}.  If the @option{-v} option is also specified
+then @option{--help} will also be passed on to the various processes
+invoked by @command{gcc}, so that they can display the command line options
+they accept.  If the @option{-Wextra} option has also been specified
+(prior to the @option{--help} option), then command line options which
+have no documentation associated with them will also be displayed.
+
+@item --target-help
+@opindex target-help
+Print (on the standard output) a description of target-specific command
+line options for each tool.  For some targets extra target-specific
+information may also be printed.
+
+@item --help=@{@var{class}@r{|[}^@r{]}@var{qualifier}@}@r{[},@dots{}@r{]}
+Print (on the standard output) a description of the command line
+options understood by the compiler that fit into all specified classes
+and qualifiers.  These are the supported classes:
+
+@table @asis
+@item @samp{optimizers}
+This will display all of the optimization options supported by the
+compiler.
+
+@item @samp{warnings}
+This will display all of the options controlling warning messages
+produced by the compiler.
+
+@item @samp{target}
+This will display target-specific options.  Unlike the
+@option{--target-help} option however, target-specific options of the
+linker and assembler will not be displayed.  This is because those
+tools do not currently support the extended @option{--help=} syntax.
+
+@item @samp{params}
+This will display the values recognized by the @option{--param}
+option.
+
+@item @var{language}
+This will display the options supported for @var{language}, where 
+@var{language} is the name of one of the languages supported in this 
+version of GCC.
+
+@item @samp{common}
+This will display the options that are common to all languages.
+@end table
+
+These are the supported qualifiers:
+
+@table @asis
+@item @samp{undocumented}
+Display only those options which are undocumented.
+
+@item @samp{joined}
+Display options which take an argument that appears after an equal
+sign in the same continuous piece of text, such as:
+@samp{--help=target}.
+
+@item @samp{separate}
+Display options which take an argument that appears as a separate word
+following the original option, such as: @samp{-o output-file}.
+@end table
+
+Thus for example to display all the undocumented target-specific
+switches supported by the compiler the following can be used:
+
+@smallexample
+--help=target,undocumented
+@end smallexample
+
+The sense of a qualifier can be inverted by prefixing it with the
+@samp{^} character, so for example to display all binary warning
+options (i.e., ones that are either on or off and that do not take an
+argument), which have a description the following can be used:
+
+@smallexample
+--help=warnings,^joined,^undocumented
+@end smallexample
+
+The argument to @option{--help=} should not consist solely of inverted
+qualifiers.
+
+Combining several classes is possible, although this usually
+restricts the output by so much that there is nothing to display.  One
+case where it does work however is when one of the classes is
+@var{target}.  So for example to display all the target-specific
+optimization options the following can be used:
+
+@smallexample
+--help=target,optimizers
+@end smallexample
+
+The @option{--help=} option can be repeated on the command line.  Each
+successive use will display its requested class of options, skipping
+those that have already been displayed.
+
+If the @option{-Q} option appears on the command line before the
+@option{--help=} option, then the descriptive text displayed by
+@option{--help=} is changed.  Instead of describing the displayed
+options, an indication is given as to whether the option is enabled,
+disabled or set to a specific value (assuming that the compiler
+knows this at the point where the @option{--help=} option is used).
+
+Here is a truncated example from the ARM port of @command{gcc}:
+
+@smallexample
+  % gcc -Q -mabi=2 --help=target -c
+  The following options are target specific:
+  -mabi=                                2
+  -mabort-on-noreturn                   [disabled]
+  -mapcs                                [disabled]
+@end smallexample
+
+The output is sensitive to the effects of previous command line
+options, so for example it is possible to find out which optimizations
+are enabled at @option{-O2} by using:
+
+@smallexample
+-Q -O2 --help=optimizers
+@end smallexample
+
+Alternatively you can discover which binary optimizations are enabled
+by @option{-O3} by using:
+
+@smallexample
+gcc -c -Q -O3 --help=optimizers > /tmp/O3-opts
+gcc -c -Q -O2 --help=optimizers > /tmp/O2-opts
+diff /tmp/O2-opts /tmp/O3-opts | grep enabled
+@end smallexample
+
+@item --version
+@opindex version
+Display the version number and copyrights of the invoked GCC@.
+
+@item -wrapper
+@opindex wrapper
+Invoke all subcommands under a wrapper program. It takes a single
+comma separated list as an argument, which will be used to invoke
+the wrapper:
+
+@smallexample
+gcc -c t.c -wrapper gdb,--args
+@end smallexample
+
+This will invoke all subprograms of gcc under "gdb --args",
+thus cc1 invocation will be "gdb --args cc1 ...".
+
+@include @value{srcdir}/../libiberty/at-file.texi
+@end table
+
+@node Invoking G++
+@section Compiling C++ Programs
+
+@cindex suffixes for C++ source
+@cindex C++ source file suffixes
+C++ source files conventionally use one of the suffixes @samp{.C},
+@samp{.cc}, @samp{.cpp}, @samp{.CPP}, @samp{.c++}, @samp{.cp}, or
+@samp{.cxx}; C++ header files often use @samp{.hh}, @samp{.hpp},
+@samp{.H}, or (for shared template code) @samp{.tcc}; and
+preprocessed C++ files use the suffix @samp{.ii}.  GCC recognizes
+files with these names and compiles them as C++ programs even if you
+call the compiler the same way as for compiling C programs (usually
+with the name @command{gcc}).
+
+@findex g++
+@findex c++
+However, the use of @command{gcc} does not add the C++ library.
+@command{g++} is a program that calls GCC and treats @samp{.c},
+@samp{.h} and @samp{.i} files as C++ source files instead of C source
+files unless @option{-x} is used, and automatically specifies linking
+against the C++ library.  This program is also useful when
+precompiling a C header file with a @samp{.h} extension for use in C++
+compilations.  On many systems, @command{g++} is also installed with
+the name @command{c++}.
+
+@cindex invoking @command{g++}
+When you compile C++ programs, you may specify many of the same
+command-line options that you use for compiling programs in any
+language; or command-line options meaningful for C and related
+languages; or options that are meaningful only for C++ programs.
+@xref{C Dialect Options,,Options Controlling C Dialect}, for
+explanations of options for languages related to C@.
+@xref{C++ Dialect Options,,Options Controlling C++ Dialect}, for
+explanations of options that are meaningful only for C++ programs.
+
+@node C Dialect Options
+@section Options Controlling C Dialect
+@cindex dialect options
+@cindex language dialect options
+@cindex options, dialect
+
+The following options control the dialect of C (or languages derived
+from C, such as C++, Objective-C and Objective-C++) that the compiler
+accepts:
+
+@table @gcctabopt
+@cindex ANSI support
+@cindex ISO support
+@item -ansi
+@opindex ansi
+In C mode, this is equivalent to @samp{-std=c89}. In C++ mode, it is
+equivalent to @samp{-std=c++98}.
+
+This turns off certain features of GCC that are incompatible with ISO
+C90 (when compiling C code), or of standard C++ (when compiling C++ code),
+such as the @code{asm} and @code{typeof} keywords, and
+predefined macros such as @code{unix} and @code{vax} that identify the
+type of system you are using.  It also enables the undesirable and
+rarely used ISO trigraph feature.  For the C compiler,
+it disables recognition of C++ style @samp{//} comments as well as
+the @code{inline} keyword.
+
+The alternate keywords @code{__asm__}, @code{__extension__},
+@code{__inline__} and @code{__typeof__} continue to work despite
+@option{-ansi}.  You would not want to use them in an ISO C program, of
+course, but it is useful to put them in header files that might be included
+in compilations done with @option{-ansi}.  Alternate predefined macros
+such as @code{__unix__} and @code{__vax__} are also available, with or
+without @option{-ansi}.
+
+The @option{-ansi} option does not cause non-ISO programs to be
+rejected gratuitously.  For that, @option{-pedantic} is required in
+addition to @option{-ansi}.  @xref{Warning Options}.
+
+The macro @code{__STRICT_ANSI__} is predefined when the @option{-ansi}
+option is used.  Some header files may notice this macro and refrain
+from declaring certain functions or defining certain macros that the
+ISO standard doesn't call for; this is to avoid interfering with any
+programs that might use these names for other things.
+
+Functions that would normally be built in but do not have semantics
+defined by ISO C (such as @code{alloca} and @code{ffs}) are not built-in
+functions when @option{-ansi} is used.  @xref{Other Builtins,,Other
+built-in functions provided by GCC}, for details of the functions
+affected.
+
+@item -std=
+@opindex std
+Determine the language standard. @xref{Standards,,Language Standards
+Supported by GCC}, for details of these standard versions.  This option
+is currently only supported when compiling C or C++. 
+
+The compiler can accept several base standards, such as @samp{c89} or
+@samp{c++98}, and GNU dialects of those standards, such as
+@samp{gnu89} or @samp{gnu++98}.  By specifying a base standard, the
+compiler will accept all programs following that standard and those
+using GNU extensions that do not contradict it.  For example,
+@samp{-std=c89} turns off certain features of GCC that are
+incompatible with ISO C90, such as the @code{asm} and @code{typeof}
+keywords, but not other GNU extensions that do not have a meaning in
+ISO C90, such as omitting the middle term of a @code{?:}
+expression. On the other hand, by specifying a GNU dialect of a
+standard, all features the compiler support are enabled, even when
+those features change the meaning of the base standard and some
+strict-conforming programs may be rejected.  The particular standard
+is used by @option{-pedantic} to identify which features are GNU
+extensions given that version of the standard. For example
+@samp{-std=gnu89 -pedantic} would warn about C++ style @samp{//}
+comments, while @samp{-std=gnu99 -pedantic} would not.
+
+A value for this option must be provided; possible values are
+
+@table @samp
+@item c89
+@itemx iso9899:1990
+Support all ISO C90 programs (certain GNU extensions that conflict
+with ISO C90 are disabled). Same as @option{-ansi} for C code.
+
+@item iso9899:199409
+ISO C90 as modified in amendment 1.
+
+@item c99
+@itemx c9x
+@itemx iso9899:1999
+@itemx iso9899:199x
+ISO C99.  Note that this standard is not yet fully supported; see
+@w{@uref{http://gcc.gnu.org/gcc-4.4/c99status.html}} for more information.  The
+names @samp{c9x} and @samp{iso9899:199x} are deprecated.
+
+@item gnu89
+GNU dialect of ISO C90 (including some C99 features). This
+is the default for C code.
+
+@item gnu99
+@itemx gnu9x
+GNU dialect of ISO C99.  When ISO C99 is fully implemented in GCC,
+this will become the default.  The name @samp{gnu9x} is deprecated.
+
+@item c++98
+The 1998 ISO C++ standard plus amendments. Same as @option{-ansi} for
+C++ code.
+
+@item gnu++98
+GNU dialect of @option{-std=c++98}.  This is the default for
+C++ code.
+
+@item c++0x
+The working draft of the upcoming ISO C++0x standard. This option
+enables experimental features that are likely to be included in
+C++0x. The working draft is constantly changing, and any feature that is
+enabled by this flag may be removed from future versions of GCC if it is
+not part of the C++0x standard.
+
+@item gnu++0x
+GNU dialect of @option{-std=c++0x}. This option enables
+experimental features that may be removed in future versions of GCC.
+@end table
+
+@item -fgnu89-inline
+@opindex fgnu89-inline
+The option @option{-fgnu89-inline} tells GCC to use the traditional
+GNU semantics for @code{inline} functions when in C99 mode.
+@xref{Inline,,An Inline Function is As Fast As a Macro}.  This option
+is accepted and ignored by GCC versions 4.1.3 up to but not including
+4.3.  In GCC versions 4.3 and later it changes the behavior of GCC in
+C99 mode.  Using this option is roughly equivalent to adding the
+@code{gnu_inline} function attribute to all inline functions
+(@pxref{Function Attributes}).
+
+The option @option{-fno-gnu89-inline} explicitly tells GCC to use the
+C99 semantics for @code{inline} when in C99 or gnu99 mode (i.e., it
+specifies the default behavior).  This option was first supported in
+GCC 4.3.  This option is not supported in C89 or gnu89 mode.
+
+The preprocessor macros @code{__GNUC_GNU_INLINE__} and
+@code{__GNUC_STDC_INLINE__} may be used to check which semantics are
+in effect for @code{inline} functions.  @xref{Common Predefined
+Macros,,,cpp,The C Preprocessor}.
+
+@item -aux-info @var{filename}
+@opindex aux-info
+Output to the given filename prototyped declarations for all functions
+declared and/or defined in a translation unit, including those in header
+files.  This option is silently ignored in any language other than C@.
+
+Besides declarations, the file indicates, in comments, the origin of
+each declaration (source file and line), whether the declaration was
+implicit, prototyped or unprototyped (@samp{I}, @samp{N} for new or
+@samp{O} for old, respectively, in the first character after the line
+number and the colon), and whether it came from a declaration or a
+definition (@samp{C} or @samp{F}, respectively, in the following
+character).  In the case of function definitions, a K&R-style list of
+arguments followed by their declarations is also provided, inside
+comments, after the declaration.
+
+@item -fno-asm
+@opindex fno-asm
+Do not recognize @code{asm}, @code{inline} or @code{typeof} as a
+keyword, so that code can use these words as identifiers.  You can use
+the keywords @code{__asm__}, @code{__inline__} and @code{__typeof__}
+instead.  @option{-ansi} implies @option{-fno-asm}.
+
+In C++, this switch only affects the @code{typeof} keyword, since
+@code{asm} and @code{inline} are standard keywords.  You may want to
+use the @option{-fno-gnu-keywords} flag instead, which has the same
+effect.  In C99 mode (@option{-std=c99} or @option{-std=gnu99}), this
+switch only affects the @code{asm} and @code{typeof} keywords, since
+@code{inline} is a standard keyword in ISO C99.
+
+@item -fno-builtin
+@itemx -fno-builtin-@var{function}
+@opindex fno-builtin
+@cindex built-in functions
+Don't recognize built-in functions that do not begin with
+@samp{__builtin_} as prefix.  @xref{Other Builtins,,Other built-in
+functions provided by GCC}, for details of the functions affected,
+including those which are not built-in functions when @option{-ansi} or
+@option{-std} options for strict ISO C conformance are used because they
+do not have an ISO standard meaning.
+
+GCC normally generates special code to handle certain built-in functions
+more efficiently; for instance, calls to @code{alloca} may become single
+instructions that adjust the stack directly, and calls to @code{memcpy}
+may become inline copy loops.  The resulting code is often both smaller
+and faster, but since the function calls no longer appear as such, you
+cannot set a breakpoint on those calls, nor can you change the behavior
+of the functions by linking with a different library.  In addition,
+when a function is recognized as a built-in function, GCC may use
+information about that function to warn about problems with calls to
+that function, or to generate more efficient code, even if the
+resulting code still contains calls to that function.  For example,
+warnings are given with @option{-Wformat} for bad calls to
+@code{printf}, when @code{printf} is built in, and @code{strlen} is
+known not to modify global memory.
+
+With the @option{-fno-builtin-@var{function}} option
+only the built-in function @var{function} is
+disabled.  @var{function} must not begin with @samp{__builtin_}.  If a
+function is named that is not built-in in this version of GCC, this
+option is ignored.  There is no corresponding
+@option{-fbuiltin-@var{function}} option; if you wish to enable
+built-in functions selectively when using @option{-fno-builtin} or
+@option{-ffreestanding}, you may define macros such as:
+
+@smallexample
+#define abs(n)          __builtin_abs ((n))
+#define strcpy(d, s)    __builtin_strcpy ((d), (s))
+@end smallexample
+
+@item -fhosted
+@opindex fhosted
+@cindex hosted environment
+
+Assert that compilation takes place in a hosted environment.  This implies
+@option{-fbuiltin}.  A hosted environment is one in which the
+entire standard library is available, and in which @code{main} has a return
+type of @code{int}.  Examples are nearly everything except a kernel.
+This is equivalent to @option{-fno-freestanding}.
+
+@item -ffreestanding
+@opindex ffreestanding
+@cindex hosted environment
+
+Assert that compilation takes place in a freestanding environment.  This
+implies @option{-fno-builtin}.  A freestanding environment
+is one in which the standard library may not exist, and program startup may
+not necessarily be at @code{main}.  The most obvious example is an OS kernel.
+This is equivalent to @option{-fno-hosted}.
+
+@xref{Standards,,Language Standards Supported by GCC}, for details of
+freestanding and hosted environments.
+
+@item -fopenmp
+@opindex fopenmp
+@cindex openmp parallel
+Enable handling of OpenMP directives @code{#pragma omp} in C/C++ and
+@code{!$omp} in Fortran.  When @option{-fopenmp} is specified, the
+compiler generates parallel code according to the OpenMP Application
+Program Interface v2.5 @w{@uref{http://www.openmp.org/}}.  This option
+implies @option{-pthread}, and thus is only supported on targets that
+have support for @option{-pthread}.
+
+@item -fms-extensions
+@opindex fms-extensions
+Accept some non-standard constructs used in Microsoft header files.
+
+Some cases of unnamed fields in structures and unions are only
+accepted with this option.  @xref{Unnamed Fields,,Unnamed struct/union
+fields within structs/unions}, for details.
+
+@item -trigraphs
+@opindex trigraphs
+Support ISO C trigraphs.  The @option{-ansi} option (and @option{-std}
+options for strict ISO C conformance) implies @option{-trigraphs}.
+
+@item -no-integrated-cpp
+@opindex no-integrated-cpp
+Performs a compilation in two passes: preprocessing and compiling.  This
+option allows a user supplied "cc1", "cc1plus", or "cc1obj" via the
+@option{-B} option.  The user supplied compilation step can then add in
+an additional preprocessing step after normal preprocessing but before
+compiling.  The default is to use the integrated cpp (internal cpp)
+
+The semantics of this option will change if "cc1", "cc1plus", and
+"cc1obj" are merged.
+
+@cindex traditional C language
+@cindex C language, traditional
+@item -traditional
+@itemx -traditional-cpp
+@opindex traditional-cpp
+@opindex traditional
+Formerly, these options caused GCC to attempt to emulate a pre-standard
+C compiler.  They are now only supported with the @option{-E} switch.
+The preprocessor continues to support a pre-standard mode.  See the GNU
+CPP manual for details.
+
+@item -fcond-mismatch
+@opindex fcond-mismatch
+Allow conditional expressions with mismatched types in the second and
+third arguments.  The value of such an expression is void.  This option
+is not supported for C++.
+
+@item -flax-vector-conversions
+@opindex flax-vector-conversions
+Allow implicit conversions between vectors with differing numbers of
+elements and/or incompatible element types.  This option should not be
+used for new code.
+
+@item -funsigned-char
+@opindex funsigned-char
+Let the type @code{char} be unsigned, like @code{unsigned char}.
+
+Each kind of machine has a default for what @code{char} should
+be.  It is either like @code{unsigned char} by default or like
+@code{signed char} by default.
+
+Ideally, a portable program should always use @code{signed char} or
+@code{unsigned char} when it depends on the signedness of an object.
+But many programs have been written to use plain @code{char} and
+expect it to be signed, or expect it to be unsigned, depending on the
+machines they were written for.  This option, and its inverse, let you
+make such a program work with the opposite default.
+
+The type @code{char} is always a distinct type from each of
+@code{signed char} or @code{unsigned char}, even though its behavior
+is always just like one of those two.
+
+@item -fsigned-char
+@opindex fsigned-char
+Let the type @code{char} be signed, like @code{signed char}.
+
+Note that this is equivalent to @option{-fno-unsigned-char}, which is
+the negative form of @option{-funsigned-char}.  Likewise, the option
+@option{-fno-signed-char} is equivalent to @option{-funsigned-char}.
+
+@item -fsigned-bitfields
+@itemx -funsigned-bitfields
+@itemx -fno-signed-bitfields
+@itemx -fno-unsigned-bitfields
+@opindex fsigned-bitfields
+@opindex funsigned-bitfields
+@opindex fno-signed-bitfields
+@opindex fno-unsigned-bitfields
+These options control whether a bit-field is signed or unsigned, when the
+declaration does not use either @code{signed} or @code{unsigned}.  By
+default, such a bit-field is signed, because this is consistent: the
+basic integer types such as @code{int} are signed types.
+@end table
+
+@node C++ Dialect Options
+@section Options Controlling C++ Dialect
+
+@cindex compiler options, C++
+@cindex C++ options, command line
+@cindex options, C++
+This section describes the command-line options that are only meaningful
+for C++ programs; but you can also use most of the GNU compiler options
+regardless of what language your program is in.  For example, you
+might compile a file @code{firstClass.C} like this:
+
+@smallexample
+g++ -g -frepo -O -c firstClass.C
+@end smallexample
+
+@noindent
+In this example, only @option{-frepo} is an option meant
+only for C++ programs; you can use the other options with any
+language supported by GCC@.
+
+Here is a list of options that are @emph{only} for compiling C++ programs:
+
+@table @gcctabopt
+
+@item -fabi-version=@var{n}
+@opindex fabi-version
+Use version @var{n} of the C++ ABI@.  Version 2 is the version of the
+C++ ABI that first appeared in G++ 3.4.  Version 1 is the version of
+the C++ ABI that first appeared in G++ 3.2.  Version 0 will always be
+the version that conforms most closely to the C++ ABI specification.
+Therefore, the ABI obtained using version 0 will change as ABI bugs
+are fixed.
+
+The default is version 2.
+
+@item -fno-access-control
+@opindex fno-access-control
+Turn off all access checking.  This switch is mainly useful for working
+around bugs in the access control code.
+
+@item -fcheck-new
+@opindex fcheck-new
+Check that the pointer returned by @code{operator new} is non-null
+before attempting to modify the storage allocated.  This check is
+normally unnecessary because the C++ standard specifies that
+@code{operator new} will only return @code{0} if it is declared
+@samp{throw()}, in which case the compiler will always check the
+return value even without this option.  In all other cases, when
+@code{operator new} has a non-empty exception specification, memory
+exhaustion is signalled by throwing @code{std::bad_alloc}.  See also
+@samp{new (nothrow)}.
+
+@item -fconserve-space
+@opindex fconserve-space
+Put uninitialized or runtime-initialized global variables into the
+common segment, as C does.  This saves space in the executable at the
+cost of not diagnosing duplicate definitions.  If you compile with this
+flag and your program mysteriously crashes after @code{main()} has
+completed, you may have an object that is being destroyed twice because
+two definitions were merged.
+
+This option is no longer useful on most targets, now that support has
+been added for putting variables into BSS without making them common.
+
+@item -fno-deduce-init-list
+@opindex fno-deduce-init-list
+Disable deduction of a template type parameter as
+std::initializer_list from a brace-enclosed initializer list, i.e.
+
+@smallexample
+template <class T> auto forward(T t) -> decltype (realfn (t))
+@{
+  return realfn (t);
+@}
+
+void f()
+@{
+  forward(@{1,2@}); // call forward<std::initializer_list<int>>
+@}
+@end smallexample
+
+This option is present because this deduction is an extension to the
+current specification in the C++0x working draft, and there was
+some concern about potential overload resolution problems.
+
+@item -ffriend-injection
+@opindex ffriend-injection
+Inject friend functions into the enclosing namespace, so that they are
+visible outside the scope of the class in which they are declared.
+Friend functions were documented to work this way in the old Annotated
+C++ Reference Manual, and versions of G++ before 4.1 always worked
+that way.  However, in ISO C++ a friend function which is not declared
+in an enclosing scope can only be found using argument dependent
+lookup.  This option causes friends to be injected as they were in
+earlier releases.
+
+This option is for compatibility, and may be removed in a future
+release of G++.
+
+@item -fno-elide-constructors
+@opindex fno-elide-constructors
+The C++ standard allows an implementation to omit creating a temporary
+which is only used to initialize another object of the same type.
+Specifying this option disables that optimization, and forces G++ to
+call the copy constructor in all cases.
+
+@item -fno-enforce-eh-specs
+@opindex fno-enforce-eh-specs
+Don't generate code to check for violation of exception specifications
+at runtime.  This option violates the C++ standard, but may be useful
+for reducing code size in production builds, much like defining
+@samp{NDEBUG}.  This does not give user code permission to throw
+exceptions in violation of the exception specifications; the compiler
+will still optimize based on the specifications, so throwing an
+unexpected exception will result in undefined behavior.
+
+@item -ffor-scope
+@itemx -fno-for-scope
+@opindex ffor-scope
+@opindex fno-for-scope
+If @option{-ffor-scope} is specified, the scope of variables declared in
+a @i{for-init-statement} is limited to the @samp{for} loop itself,
+as specified by the C++ standard.
+If @option{-fno-for-scope} is specified, the scope of variables declared in
+a @i{for-init-statement} extends to the end of the enclosing scope,
+as was the case in old versions of G++, and other (traditional)
+implementations of C++.
+
+The default if neither flag is given to follow the standard,
+but to allow and give a warning for old-style code that would
+otherwise be invalid, or have different behavior.
+
+@item -fno-gnu-keywords
+@opindex fno-gnu-keywords
+Do not recognize @code{typeof} as a keyword, so that code can use this
+word as an identifier.  You can use the keyword @code{__typeof__} instead.
+@option{-ansi} implies @option{-fno-gnu-keywords}.
+
+@item -fno-implicit-templates
+@opindex fno-implicit-templates
+Never emit code for non-inline templates which are instantiated
+implicitly (i.e.@: by use); only emit code for explicit instantiations.
+@xref{Template Instantiation}, for more information.
+
+@item -fno-implicit-inline-templates
+@opindex fno-implicit-inline-templates
+Don't emit code for implicit instantiations of inline templates, either.
+The default is to handle inlines differently so that compiles with and
+without optimization will need the same set of explicit instantiations.
+
+@item -fno-implement-inlines
+@opindex fno-implement-inlines
+To save space, do not emit out-of-line copies of inline functions
+controlled by @samp{#pragma implementation}.  This will cause linker
+errors if these functions are not inlined everywhere they are called.
+
+@item -fms-extensions
+@opindex fms-extensions
+Disable pedantic warnings about constructs used in MFC, such as implicit
+int and getting a pointer to member function via non-standard syntax.
+
+@item -fno-nonansi-builtins
+@opindex fno-nonansi-builtins
+Disable built-in declarations of functions that are not mandated by
+ANSI/ISO C@.  These include @code{ffs}, @code{alloca}, @code{_exit},
+@code{index}, @code{bzero}, @code{conjf}, and other related functions.
+
+@item -fno-operator-names
+@opindex fno-operator-names
+Do not treat the operator name keywords @code{and}, @code{bitand},
+@code{bitor}, @code{compl}, @code{not}, @code{or} and @code{xor} as
+synonyms as keywords.
+
+@item -fno-optional-diags
+@opindex fno-optional-diags
+Disable diagnostics that the standard says a compiler does not need to
+issue.  Currently, the only such diagnostic issued by G++ is the one for
+a name having multiple meanings within a class.
+
+@item -fpermissive
+@opindex fpermissive
+Downgrade some diagnostics about nonconformant code from errors to
+warnings.  Thus, using @option{-fpermissive} will allow some
+nonconforming code to compile.
+
+@item -frepo
+@opindex frepo
+Enable automatic template instantiation at link time.  This option also
+implies @option{-fno-implicit-templates}.  @xref{Template
+Instantiation}, for more information.
+
+@item -fno-rtti
+@opindex fno-rtti
+Disable generation of information about every class with virtual
+functions for use by the C++ runtime type identification features
+(@samp{dynamic_cast} and @samp{typeid}).  If you don't use those parts
+of the language, you can save some space by using this flag.  Note that
+exception handling uses the same information, but it will generate it as
+needed. The @samp{dynamic_cast} operator can still be used for casts that
+do not require runtime type information, i.e.@: casts to @code{void *} or to
+unambiguous base classes.
+
+@item -fstats
+@opindex fstats
+Emit statistics about front-end processing at the end of the compilation.
+This information is generally only useful to the G++ development team.
+
+@item -ftemplate-depth-@var{n}
+@opindex ftemplate-depth
+Set the maximum instantiation depth for template classes to @var{n}.
+A limit on the template instantiation depth is needed to detect
+endless recursions during template class instantiation.  ANSI/ISO C++
+conforming programs must not rely on a maximum depth greater than 17.
+
+@item -fno-threadsafe-statics
+@opindex fno-threadsafe-statics
+Do not emit the extra code to use the routines specified in the C++
+ABI for thread-safe initialization of local statics.  You can use this
+option to reduce code size slightly in code that doesn't need to be
+thread-safe.
+
+@item -fuse-cxa-atexit
+@opindex fuse-cxa-atexit
+Register destructors for objects with static storage duration with the
+@code{__cxa_atexit} function rather than the @code{atexit} function.
+This option is required for fully standards-compliant handling of static
+destructors, but will only work if your C library supports
+@code{__cxa_atexit}.
+
+@item -fno-use-cxa-get-exception-ptr
+@opindex fno-use-cxa-get-exception-ptr
+Don't use the @code{__cxa_get_exception_ptr} runtime routine.  This
+will cause @code{std::uncaught_exception} to be incorrect, but is necessary
+if the runtime routine is not available.
+
+@item -fvisibility-inlines-hidden
+@opindex fvisibility-inlines-hidden
+This switch declares that the user does not attempt to compare
+pointers to inline methods where the addresses of the two functions
+were taken in different shared objects.
+
+The effect of this is that GCC may, effectively, mark inline methods with
+@code{__attribute__ ((visibility ("hidden")))} so that they do not
+appear in the export table of a DSO and do not require a PLT indirection
+when used within the DSO@.  Enabling this option can have a dramatic effect
+on load and link times of a DSO as it massively reduces the size of the
+dynamic export table when the library makes heavy use of templates.
+
+The behavior of this switch is not quite the same as marking the
+methods as hidden directly, because it does not affect static variables
+local to the function or cause the compiler to deduce that
+the function is defined in only one shared object.
+
+You may mark a method as having a visibility explicitly to negate the
+effect of the switch for that method.  For example, if you do want to
+compare pointers to a particular inline method, you might mark it as
+having default visibility.  Marking the enclosing class with explicit
+visibility will have no effect.
+
+Explicitly instantiated inline methods are unaffected by this option
+as their linkage might otherwise cross a shared library boundary.
+@xref{Template Instantiation}.
+
+@item -fvisibility-ms-compat
+@opindex fvisibility-ms-compat
+This flag attempts to use visibility settings to make GCC's C++
+linkage model compatible with that of Microsoft Visual Studio.
+
+The flag makes these changes to GCC's linkage model:
+
+@enumerate
+@item
+It sets the default visibility to @code{hidden}, like
+@option{-fvisibility=hidden}.
+
+@item
+Types, but not their members, are not hidden by default.
+
+@item
+The One Definition Rule is relaxed for types without explicit
+visibility specifications which are defined in more than one different
+shared object: those declarations are permitted if they would have
+been permitted when this option was not used.
+@end enumerate
+
+In new code it is better to use @option{-fvisibility=hidden} and
+export those classes which are intended to be externally visible.
+Unfortunately it is possible for code to rely, perhaps accidentally,
+on the Visual Studio behavior.
+
+Among the consequences of these changes are that static data members
+of the same type with the same name but defined in different shared
+objects will be different, so changing one will not change the other;
+and that pointers to function members defined in different shared
+objects may not compare equal.  When this flag is given, it is a
+violation of the ODR to define types with the same name differently.
+
+@item -fno-weak
+@opindex fno-weak
+Do not use weak symbol support, even if it is provided by the linker.
+By default, G++ will use weak symbols if they are available.  This
+option exists only for testing, and should not be used by end-users;
+it will result in inferior code and has no benefits.  This option may
+be removed in a future release of G++.
+
+@item -nostdinc++
+@opindex nostdinc++
+Do not search for header files in the standard directories specific to
+C++, but do still search the other standard directories.  (This option
+is used when building the C++ library.)
+@end table
+
+In addition, these optimization, warning, and code generation options
+have meanings only for C++ programs:
+
+@table @gcctabopt
+@item -fno-default-inline
+@opindex fno-default-inline
+Do not assume @samp{inline} for functions defined inside a class scope.
+@xref{Optimize Options,,Options That Control Optimization}.  Note that these
+functions will have linkage like inline functions; they just won't be
+inlined by default.
+
+@item -Wabi @r{(C, Objective-C, C++ and Objective-C++ only)}
+@opindex Wabi
+@opindex Wno-abi
+Warn when G++ generates code that is probably not compatible with the
+vendor-neutral C++ ABI@.  Although an effort has been made to warn about
+all such cases, there are probably some cases that are not warned about,
+even though G++ is generating incompatible code.  There may also be
+cases where warnings are emitted even though the code that is generated
+will be compatible.
+
+You should rewrite your code to avoid these warnings if you are
+concerned about the fact that code generated by G++ may not be binary
+compatible with code generated by other compilers.
+
+The known incompatibilities at this point include:
+
+@itemize @bullet
+
+@item
+Incorrect handling of tail-padding for bit-fields.  G++ may attempt to
+pack data into the same byte as a base class.  For example:
+
+@smallexample
+struct A @{ virtual void f(); int f1 : 1; @};
+struct B : public A @{ int f2 : 1; @};
+@end smallexample
+
+@noindent
+In this case, G++ will place @code{B::f2} into the same byte
+as@code{A::f1}; other compilers will not.  You can avoid this problem
+by explicitly padding @code{A} so that its size is a multiple of the
+byte size on your platform; that will cause G++ and other compilers to
+layout @code{B} identically.
+
+@item
+Incorrect handling of tail-padding for virtual bases.  G++ does not use
+tail padding when laying out virtual bases.  For example:
+
+@smallexample
+struct A @{ virtual void f(); char c1; @};
+struct B @{ B(); char c2; @};
+struct C : public A, public virtual B @{@};
+@end smallexample
+
+@noindent
+In this case, G++ will not place @code{B} into the tail-padding for
+@code{A}; other compilers will.  You can avoid this problem by
+explicitly padding @code{A} so that its size is a multiple of its
+alignment (ignoring virtual base classes); that will cause G++ and other
+compilers to layout @code{C} identically.
+
+@item
+Incorrect handling of bit-fields with declared widths greater than that
+of their underlying types, when the bit-fields appear in a union.  For
+example:
+
+@smallexample
+union U @{ int i : 4096; @};
+@end smallexample
+
+@noindent
+Assuming that an @code{int} does not have 4096 bits, G++ will make the
+union too small by the number of bits in an @code{int}.
+
+@item
+Empty classes can be placed at incorrect offsets.  For example:
+
+@smallexample
+struct A @{@};
+
+struct B @{
+  A a;
+  virtual void f ();
+@};
+
+struct C : public B, public A @{@};
+@end smallexample
+
+@noindent
+G++ will place the @code{A} base class of @code{C} at a nonzero offset;
+it should be placed at offset zero.  G++ mistakenly believes that the
+@code{A} data member of @code{B} is already at offset zero.
+
+@item
+Names of template functions whose types involve @code{typename} or
+template template parameters can be mangled incorrectly.
+
+@smallexample
+template <typename Q>
+void f(typename Q::X) @{@}
+
+template <template <typename> class Q>
+void f(typename Q<int>::X) @{@}
+@end smallexample
+
+@noindent
+Instantiations of these templates may be mangled incorrectly.
+
+@end itemize
+
+It also warns psABI related changes.  The known psABI changes at this
+point include:
+
+@itemize @bullet
+
+@item
+For SYSV/x86-64, when passing union with long double, it is changed to
+pass in memory as specified in psABI.  For example:
+
+@smallexample
+union U @{
+  long double ld;
+  int i;
+@};
+@end smallexample
+
+@noindent
+@code{union U} will always be passed in memory.
+
+@end itemize
+
+@item -Wctor-dtor-privacy @r{(C++ and Objective-C++ only)}
+@opindex Wctor-dtor-privacy
+@opindex Wno-ctor-dtor-privacy
+Warn when a class seems unusable because all the constructors or
+destructors in that class are private, and it has neither friends nor
+public static member functions.
+
+@item -Wnon-virtual-dtor @r{(C++ and Objective-C++ only)}
+@opindex Wnon-virtual-dtor
+@opindex Wno-non-virtual-dtor
+Warn when a class has virtual functions and accessible non-virtual
+destructor, in which case it would be possible but unsafe to delete
+an instance of a derived class through a pointer to the base class.
+This warning is also enabled if -Weffc++ is specified.
+
+@item -Wreorder @r{(C++ and Objective-C++ only)}
+@opindex Wreorder
+@opindex Wno-reorder
+@cindex reordering, warning
+@cindex warning for reordering of member initializers
+Warn when the order of member initializers given in the code does not
+match the order in which they must be executed.  For instance:
+
+@smallexample
+struct A @{
+  int i;
+  int j;
+  A(): j (0), i (1) @{ @}
+@};
+@end smallexample
+
+The compiler will rearrange the member initializers for @samp{i}
+and @samp{j} to match the declaration order of the members, emitting
+a warning to that effect.  This warning is enabled by @option{-Wall}.
+@end table
+
+The following @option{-W@dots{}} options are not affected by @option{-Wall}.
+
+@table @gcctabopt
+@item -Weffc++ @r{(C++ and Objective-C++ only)}
+@opindex Weffc++
+@opindex Wno-effc++
+Warn about violations of the following style guidelines from Scott Meyers'
+@cite{Effective C++} book:
+
+@itemize @bullet
+@item
+Item 11:  Define a copy constructor and an assignment operator for classes
+with dynamically allocated memory.
+
+@item
+Item 12:  Prefer initialization to assignment in constructors.
+
+@item
+Item 14:  Make destructors virtual in base classes.
+
+@item
+Item 15:  Have @code{operator=} return a reference to @code{*this}.
+
+@item
+Item 23:  Don't try to return a reference when you must return an object.
+
+@end itemize
+
+Also warn about violations of the following style guidelines from
+Scott Meyers' @cite{More Effective C++} book:
+
+@itemize @bullet
+@item
+Item 6:  Distinguish between prefix and postfix forms of increment and
+decrement operators.
+
+@item
+Item 7:  Never overload @code{&&}, @code{||}, or @code{,}.
+
+@end itemize
+
+When selecting this option, be aware that the standard library
+headers do not obey all of these guidelines; use @samp{grep -v}
+to filter out those warnings.
+
+@item -Wstrict-null-sentinel @r{(C++ and Objective-C++ only)}
+@opindex Wstrict-null-sentinel
+@opindex Wno-strict-null-sentinel
+Warn also about the use of an uncasted @code{NULL} as sentinel.  When
+compiling only with GCC this is a valid sentinel, as @code{NULL} is defined
+to @code{__null}.  Although it is a null pointer constant not a null pointer,
+it is guaranteed to be of the same size as a pointer.  But this use is
+not portable across different compilers.
+
+@item -Wno-non-template-friend @r{(C++ and Objective-C++ only)}
+@opindex Wno-non-template-friend
+@opindex Wnon-template-friend
+Disable warnings when non-templatized friend functions are declared
+within a template.  Since the advent of explicit template specification
+support in G++, if the name of the friend is an unqualified-id (i.e.,
+@samp{friend foo(int)}), the C++ language specification demands that the
+friend declare or define an ordinary, nontemplate function.  (Section
+14.5.3).  Before G++ implemented explicit specification, unqualified-ids
+could be interpreted as a particular specialization of a templatized
+function.  Because this non-conforming behavior is no longer the default
+behavior for G++, @option{-Wnon-template-friend} allows the compiler to
+check existing code for potential trouble spots and is on by default.
+This new compiler behavior can be turned off with
+@option{-Wno-non-template-friend} which keeps the conformant compiler code
+but disables the helpful warning.
+
+@item -Wold-style-cast @r{(C++ and Objective-C++ only)}
+@opindex Wold-style-cast
+@opindex Wno-old-style-cast
+Warn if an old-style (C-style) cast to a non-void type is used within
+a C++ program.  The new-style casts (@samp{dynamic_cast},
+@samp{static_cast}, @samp{reinterpret_cast}, and @samp{const_cast}) are
+less vulnerable to unintended effects and much easier to search for.
+
+@item -Woverloaded-virtual @r{(C++ and Objective-C++ only)}
+@opindex Woverloaded-virtual
+@opindex Wno-overloaded-virtual
+@cindex overloaded virtual fn, warning
+@cindex warning for overloaded virtual fn
+Warn when a function declaration hides virtual functions from a
+base class.  For example, in:
+
+@smallexample
+struct A @{
+  virtual void f();
+@};
+
+struct B: public A @{
+  void f(int);
+@};
+@end smallexample
+
+the @code{A} class version of @code{f} is hidden in @code{B}, and code
+like:
+
+@smallexample
+B* b;
+b->f();
+@end smallexample
+
+will fail to compile.
+
+@item -Wno-pmf-conversions @r{(C++ and Objective-C++ only)}
+@opindex Wno-pmf-conversions
+@opindex Wpmf-conversions
+Disable the diagnostic for converting a bound pointer to member function
+to a plain pointer.
+
+@item -Wsign-promo @r{(C++ and Objective-C++ only)}
+@opindex Wsign-promo
+@opindex Wno-sign-promo
+Warn when overload resolution chooses a promotion from unsigned or
+enumerated type to a signed type, over a conversion to an unsigned type of
+the same size.  Previous versions of G++ would try to preserve
+unsignedness, but the standard mandates the current behavior.
+
+@smallexample
+struct A @{
+  operator int ();
+  A& operator = (int);
+@};
+
+main ()
+@{
+  A a,b;
+  a = b;
+@}
+@end smallexample
+
+In this example, G++ will synthesize a default @samp{A& operator =
+(const A&);}, while cfront will use the user-defined @samp{operator =}.
+@end table
+
+@node Objective-C and Objective-C++ Dialect Options
+@section Options Controlling Objective-C and Objective-C++ Dialects
+
+@cindex compiler options, Objective-C and Objective-C++
+@cindex Objective-C and Objective-C++ options, command line
+@cindex options, Objective-C and Objective-C++
+(NOTE: This manual does not describe the Objective-C and Objective-C++
+languages themselves.  See @xref{Standards,,Language Standards
+Supported by GCC}, for references.)
+
+This section describes the command-line options that are only meaningful
+for Objective-C and Objective-C++ programs, but you can also use most of
+the language-independent GNU compiler options.
+For example, you might compile a file @code{some_class.m} like this:
+
+@smallexample
+gcc -g -fgnu-runtime -O -c some_class.m
+@end smallexample
+
+@noindent
+In this example, @option{-fgnu-runtime} is an option meant only for
+Objective-C and Objective-C++ programs; you can use the other options with
+any language supported by GCC@.
+
+Note that since Objective-C is an extension of the C language, Objective-C
+compilations may also use options specific to the C front-end (e.g.,
+@option{-Wtraditional}).  Similarly, Objective-C++ compilations may use
+C++-specific options (e.g., @option{-Wabi}).
+
+Here is a list of options that are @emph{only} for compiling Objective-C
+and Objective-C++ programs:
+
+@table @gcctabopt
+@item -fconstant-string-class=@var{class-name}
+@opindex fconstant-string-class
+Use @var{class-name} as the name of the class to instantiate for each
+literal string specified with the syntax @code{@@"@dots{}"}.  The default
+class name is @code{NXConstantString} if the GNU runtime is being used, and
+@code{NSConstantString} if the NeXT runtime is being used (see below).  The
+@option{-fconstant-cfstrings} option, if also present, will override the
+@option{-fconstant-string-class} setting and cause @code{@@"@dots{}"} literals
+to be laid out as constant CoreFoundation strings.
+
+@item -fgnu-runtime
+@opindex fgnu-runtime
+Generate object code compatible with the standard GNU Objective-C
+runtime.  This is the default for most types of systems.
+
+@item -fnext-runtime
+@opindex fnext-runtime
+Generate output compatible with the NeXT runtime.  This is the default
+for NeXT-based systems, including Darwin and Mac OS X@.  The macro
+@code{__NEXT_RUNTIME__} is predefined if (and only if) this option is
+used.
+
+@item -fno-nil-receivers
+@opindex fno-nil-receivers
+Assume that all Objective-C message dispatches (e.g.,
+@code{[receiver message:arg]}) in this translation unit ensure that the receiver
+is not @code{nil}.  This allows for more efficient entry points in the runtime
+to be used.  Currently, this option is only available in conjunction with
+the NeXT runtime on Mac OS X 10.3 and later.
+
+@item -fobjc-call-cxx-cdtors
+@opindex fobjc-call-cxx-cdtors
+For each Objective-C class, check if any of its instance variables is a
+C++ object with a non-trivial default constructor.  If so, synthesize a
+special @code{- (id) .cxx_construct} instance method that will run
+non-trivial default constructors on any such instance variables, in order,
+and then return @code{self}.  Similarly, check if any instance variable
+is a C++ object with a non-trivial destructor, and if so, synthesize a
+special @code{- (void) .cxx_destruct} method that will run
+all such default destructors, in reverse order.
+
+The @code{- (id) .cxx_construct} and/or @code{- (void) .cxx_destruct} methods
+thusly generated will only operate on instance variables declared in the
+current Objective-C class, and not those inherited from superclasses.  It
+is the responsibility of the Objective-C runtime to invoke all such methods
+in an object's inheritance hierarchy.  The @code{- (id) .cxx_construct} methods
+will be invoked by the runtime immediately after a new object
+instance is allocated; the @code{- (void) .cxx_destruct} methods will
+be invoked immediately before the runtime deallocates an object instance.
+
+As of this writing, only the NeXT runtime on Mac OS X 10.4 and later has
+support for invoking the @code{- (id) .cxx_construct} and
+@code{- (void) .cxx_destruct} methods.
+
+@item -fobjc-direct-dispatch
+@opindex fobjc-direct-dispatch
+Allow fast jumps to the message dispatcher.  On Darwin this is
+accomplished via the comm page.
+
+@item -fobjc-exceptions
+@opindex fobjc-exceptions
+Enable syntactic support for structured exception handling in Objective-C,
+similar to what is offered by C++ and Java.  This option is
+unavailable in conjunction with the NeXT runtime on Mac OS X 10.2 and
+earlier.
+
+@smallexample
+  @@try @{
+    @dots{}
+       @@throw expr;
+    @dots{}
+  @}
+  @@catch (AnObjCClass *exc) @{
+    @dots{}
+      @@throw expr;
+    @dots{}
+      @@throw;
+    @dots{}
+  @}
+  @@catch (AnotherClass *exc) @{
+    @dots{}
+  @}
+  @@catch (id allOthers) @{
+    @dots{}
+  @}
+  @@finally @{
+    @dots{}
+      @@throw expr;
+    @dots{}
+  @}
+@end smallexample
+
+The @code{@@throw} statement may appear anywhere in an Objective-C or
+Objective-C++ program; when used inside of a @code{@@catch} block, the
+@code{@@throw} may appear without an argument (as shown above), in which case
+the object caught by the @code{@@catch} will be rethrown.
+
+Note that only (pointers to) Objective-C objects may be thrown and
+caught using this scheme.  When an object is thrown, it will be caught
+by the nearest @code{@@catch} clause capable of handling objects of that type,
+analogously to how @code{catch} blocks work in C++ and Java.  A
+@code{@@catch(id @dots{})} clause (as shown above) may also be provided to catch
+any and all Objective-C exceptions not caught by previous @code{@@catch}
+clauses (if any).
+
+The @code{@@finally} clause, if present, will be executed upon exit from the
+immediately preceding @code{@@try @dots{} @@catch} section.  This will happen
+regardless of whether any exceptions are thrown, caught or rethrown
+inside the @code{@@try @dots{} @@catch} section, analogously to the behavior
+of the @code{finally} clause in Java.
+
+There are several caveats to using the new exception mechanism:
+
+@itemize @bullet
+@item
+Although currently designed to be binary compatible with @code{NS_HANDLER}-style
+idioms provided by the @code{NSException} class, the new
+exceptions can only be used on Mac OS X 10.3 (Panther) and later
+systems, due to additional functionality needed in the (NeXT) Objective-C
+runtime.
+
+@item
+As mentioned above, the new exceptions do not support handling
+types other than Objective-C objects.   Furthermore, when used from
+Objective-C++, the Objective-C exception model does not interoperate with C++
+exceptions at this time.  This means you cannot @code{@@throw} an exception
+from Objective-C and @code{catch} it in C++, or vice versa
+(i.e., @code{throw @dots{} @@catch}).
+@end itemize
+
+The @option{-fobjc-exceptions} switch also enables the use of synchronization
+blocks for thread-safe execution:
+
+@smallexample
+  @@synchronized (ObjCClass *guard) @{
+    @dots{}
+  @}
+@end smallexample
+
+Upon entering the @code{@@synchronized} block, a thread of execution shall
+first check whether a lock has been placed on the corresponding @code{guard}
+object by another thread.  If it has, the current thread shall wait until
+the other thread relinquishes its lock.  Once @code{guard} becomes available,
+the current thread will place its own lock on it, execute the code contained in
+the @code{@@synchronized} block, and finally relinquish the lock (thereby
+making @code{guard} available to other threads).
+
+Unlike Java, Objective-C does not allow for entire methods to be marked
+@code{@@synchronized}.  Note that throwing exceptions out of
+@code{@@synchronized} blocks is allowed, and will cause the guarding object
+to be unlocked properly.
+
+@item -fobjc-gc
+@opindex fobjc-gc
+Enable garbage collection (GC) in Objective-C and Objective-C++ programs.
+
+@item -freplace-objc-classes
+@opindex freplace-objc-classes
+Emit a special marker instructing @command{ld(1)} not to statically link in
+the resulting object file, and allow @command{dyld(1)} to load it in at
+run time instead.  This is used in conjunction with the Fix-and-Continue
+debugging mode, where the object file in question may be recompiled and
+dynamically reloaded in the course of program execution, without the need
+to restart the program itself.  Currently, Fix-and-Continue functionality
+is only available in conjunction with the NeXT runtime on Mac OS X 10.3
+and later.
+
+@item -fzero-link
+@opindex fzero-link
+When compiling for the NeXT runtime, the compiler ordinarily replaces calls
+to @code{objc_getClass("@dots{}")} (when the name of the class is known at
+compile time) with static class references that get initialized at load time,
+which improves run-time performance.  Specifying the @option{-fzero-link} flag
+suppresses this behavior and causes calls to @code{objc_getClass("@dots{}")}
+to be retained.  This is useful in Zero-Link debugging mode, since it allows
+for individual class implementations to be modified during program execution.
+
+@item -gen-decls
+@opindex gen-decls
+Dump interface declarations for all classes seen in the source file to a
+file named @file{@var{sourcename}.decl}.
+
+@item -Wassign-intercept @r{(Objective-C and Objective-C++ only)}
+@opindex Wassign-intercept
+@opindex Wno-assign-intercept
+Warn whenever an Objective-C assignment is being intercepted by the
+garbage collector.
+
+@item -Wno-protocol @r{(Objective-C and Objective-C++ only)}
+@opindex Wno-protocol
+@opindex Wprotocol
+If a class is declared to implement a protocol, a warning is issued for
+every method in the protocol that is not implemented by the class.  The
+default behavior is to issue a warning for every method not explicitly
+implemented in the class, even if a method implementation is inherited
+from the superclass.  If you use the @option{-Wno-protocol} option, then
+methods inherited from the superclass are considered to be implemented,
+and no warning is issued for them.
+
+@item -Wselector @r{(Objective-C and Objective-C++ only)}
+@opindex Wselector
+@opindex Wno-selector
+Warn if multiple methods of different types for the same selector are
+found during compilation.  The check is performed on the list of methods
+in the final stage of compilation.  Additionally, a check is performed
+for each selector appearing in a @code{@@selector(@dots{})}
+expression, and a corresponding method for that selector has been found
+during compilation.  Because these checks scan the method table only at
+the end of compilation, these warnings are not produced if the final
+stage of compilation is not reached, for example because an error is
+found during compilation, or because the @option{-fsyntax-only} option is
+being used.
+
+@item -Wstrict-selector-match @r{(Objective-C and Objective-C++ only)}
+@opindex Wstrict-selector-match
+@opindex Wno-strict-selector-match
+Warn if multiple methods with differing argument and/or return types are
+found for a given selector when attempting to send a message using this
+selector to a receiver of type @code{id} or @code{Class}.  When this flag
+is off (which is the default behavior), the compiler will omit such warnings
+if any differences found are confined to types which share the same size
+and alignment.
+
+@item -Wundeclared-selector @r{(Objective-C and Objective-C++ only)}
+@opindex Wundeclared-selector
+@opindex Wno-undeclared-selector
+Warn if a @code{@@selector(@dots{})} expression referring to an
+undeclared selector is found.  A selector is considered undeclared if no
+method with that name has been declared before the
+@code{@@selector(@dots{})} expression, either explicitly in an
+@code{@@interface} or @code{@@protocol} declaration, or implicitly in
+an @code{@@implementation} section.  This option always performs its
+checks as soon as a @code{@@selector(@dots{})} expression is found,
+while @option{-Wselector} only performs its checks in the final stage of
+compilation.  This also enforces the coding style convention
+that methods and selectors must be declared before being used.
+
+@item -print-objc-runtime-info
+@opindex print-objc-runtime-info
+Generate C header describing the largest structure that is passed by
+value, if any.
+
+@end table
+
+@node Language Independent Options
+@section Options to Control Diagnostic Messages Formatting
+@cindex options to control diagnostics formatting
+@cindex diagnostic messages
+@cindex message formatting
+
+Traditionally, diagnostic messages have been formatted irrespective of
+the output device's aspect (e.g.@: its width, @dots{}).  The options described
+below can be used to control the diagnostic messages formatting
+algorithm, e.g.@: how many characters per line, how often source location
+information should be reported.  Right now, only the C++ front end can
+honor these options.  However it is expected, in the near future, that
+the remaining front ends would be able to digest them correctly.
+
+@table @gcctabopt
+@item -fmessage-length=@var{n}
+@opindex fmessage-length
+Try to format error messages so that they fit on lines of about @var{n}
+characters.  The default is 72 characters for @command{g++} and 0 for the rest of
+the front ends supported by GCC@.  If @var{n} is zero, then no
+line-wrapping will be done; each error message will appear on a single
+line.
+
+@opindex fdiagnostics-show-location
+@item -fdiagnostics-show-location=once
+Only meaningful in line-wrapping mode.  Instructs the diagnostic messages
+reporter to emit @emph{once} source location information; that is, in
+case the message is too long to fit on a single physical line and has to
+be wrapped, the source location won't be emitted (as prefix) again,
+over and over, in subsequent continuation lines.  This is the default
+behavior.
+
+@item -fdiagnostics-show-location=every-line
+Only meaningful in line-wrapping mode.  Instructs the diagnostic
+messages reporter to emit the same source location information (as
+prefix) for physical lines that result from the process of breaking
+a message which is too long to fit on a single line.
+
+@item -fdiagnostics-show-option
+@opindex fdiagnostics-show-option
+This option instructs the diagnostic machinery to add text to each
+diagnostic emitted, which indicates which command line option directly
+controls that diagnostic, when such an option is known to the
+diagnostic machinery.
+
+@item -Wcoverage-mismatch
+@opindex Wcoverage-mismatch
+Warn if feedback profiles do not match when using the
+@option{-fprofile-use} option.
+If a source file was changed between @option{-fprofile-gen} and
+@option{-fprofile-use}, the files with the profile feedback can fail
+to match the source file and GCC can not use the profile feedback
+information.  By default, GCC emits an error message in this case.
+The option @option{-Wcoverage-mismatch} emits a warning instead of an
+error.  GCC does not use appropriate feedback profiles, so using this
+option can result in poorly optimized code.  This option is useful
+only in the case of very minor changes such as bug fixes to an
+existing code-base.
+
+@end table
+
+@node Warning Options
+@section Options to Request or Suppress Warnings
+@cindex options to control warnings
+@cindex warning messages
+@cindex messages, warning
+@cindex suppressing warnings
+
+Warnings are diagnostic messages that report constructions which
+are not inherently erroneous but which are risky or suggest there
+may have been an error.
+
+The following language-independent options do not enable specific
+warnings but control the kinds of diagnostics produced by GCC.
+
+@table @gcctabopt
+@cindex syntax checking
+@item -fsyntax-only
+@opindex fsyntax-only
+Check the code for syntax errors, but don't do anything beyond that.
+
+@item -w
+@opindex w
+Inhibit all warning messages.
+
+@item -Werror
+@opindex Werror
+@opindex Wno-error
+Make all warnings into errors.
+
+@item -Werror=
+@opindex Werror=
+@opindex Wno-error=
+Make the specified warning into an error.  The specifier for a warning
+is appended, for example @option{-Werror=switch} turns the warnings
+controlled by @option{-Wswitch} into errors.  This switch takes a
+negative form, to be used to negate @option{-Werror} for specific
+warnings, for example @option{-Wno-error=switch} makes
+@option{-Wswitch} warnings not be errors, even when @option{-Werror}
+is in effect.  You can use the @option{-fdiagnostics-show-option}
+option to have each controllable warning amended with the option which
+controls it, to determine what to use with this option.
+
+Note that specifying @option{-Werror=}@var{foo} automatically implies
+@option{-W}@var{foo}.  However, @option{-Wno-error=}@var{foo} does not
+imply anything.
+
+@item -Wfatal-errors
+@opindex Wfatal-errors
+@opindex Wno-fatal-errors
+This option causes the compiler to abort compilation on the first error
+occurred rather than trying to keep going and printing further error
+messages.
+
+@end table
+
+You can request many specific warnings with options beginning
+@samp{-W}, for example @option{-Wimplicit} to request warnings on
+implicit declarations.  Each of these specific warning options also
+has a negative form beginning @samp{-Wno-} to turn off warnings; for
+example, @option{-Wno-implicit}.  This manual lists only one of the
+two forms, whichever is not the default.  For further,
+language-specific options also refer to @ref{C++ Dialect Options} and
+@ref{Objective-C and Objective-C++ Dialect Options}.
+
+@table @gcctabopt
+@item -pedantic
+@opindex pedantic
+Issue all the warnings demanded by strict ISO C and ISO C++;
+reject all programs that use forbidden extensions, and some other
+programs that do not follow ISO C and ISO C++.  For ISO C, follows the
+version of the ISO C standard specified by any @option{-std} option used.
+
+Valid ISO C and ISO C++ programs should compile properly with or without
+this option (though a rare few will require @option{-ansi} or a
+@option{-std} option specifying the required version of ISO C)@.  However,
+without this option, certain GNU extensions and traditional C and C++
+features are supported as well.  With this option, they are rejected.
+
+@option{-pedantic} does not cause warning messages for use of the
+alternate keywords whose names begin and end with @samp{__}.  Pedantic
+warnings are also disabled in the expression that follows
+@code{__extension__}.  However, only system header files should use
+these escape routes; application programs should avoid them.
+@xref{Alternate Keywords}.
+
+Some users try to use @option{-pedantic} to check programs for strict ISO
+C conformance.  They soon find that it does not do quite what they want:
+it finds some non-ISO practices, but not all---only those for which
+ISO C @emph{requires} a diagnostic, and some others for which
+diagnostics have been added.
+
+A feature to report any failure to conform to ISO C might be useful in
+some instances, but would require considerable additional work and would
+be quite different from @option{-pedantic}.  We don't have plans to
+support such a feature in the near future.
+
+Where the standard specified with @option{-std} represents a GNU
+extended dialect of C, such as @samp{gnu89} or @samp{gnu99}, there is a
+corresponding @dfn{base standard}, the version of ISO C on which the GNU
+extended dialect is based.  Warnings from @option{-pedantic} are given
+where they are required by the base standard.  (It would not make sense
+for such warnings to be given only for features not in the specified GNU
+C dialect, since by definition the GNU dialects of C include all
+features the compiler supports with the given option, and there would be
+nothing to warn about.)
+
+@item -pedantic-errors
+@opindex pedantic-errors
+Like @option{-pedantic}, except that errors are produced rather than
+warnings.
+
+@item -Wall
+@opindex Wall
+@opindex Wno-all
+This enables all the warnings about constructions that some users
+consider questionable, and that are easy to avoid (or modify to
+prevent the warning), even in conjunction with macros.  This also
+enables some language-specific warnings described in @ref{C++ Dialect
+Options} and @ref{Objective-C and Objective-C++ Dialect Options}.
+
+@option{-Wall} turns on the following warning flags:
+
+@gccoptlist{-Waddress   @gol
+-Warray-bounds @r{(only with} @option{-O2}@r{)}  @gol
+-Wc++0x-compat  @gol
+-Wchar-subscripts  @gol
+-Wimplicit-int  @gol
+-Wimplicit-function-declaration  @gol
+-Wcomment  @gol
+-Wformat   @gol
+-Wmain @r{(only for C/ObjC and unless} @option{-ffreestanding}@r{)}  @gol
+-Wmissing-braces  @gol
+-Wnonnull  @gol
+-Wparentheses  @gol
+-Wpointer-sign  @gol
+-Wreorder   @gol
+-Wreturn-type  @gol
+-Wsequence-point  @gol
+-Wsign-compare @r{(only in C++)}  @gol
+-Wstrict-aliasing  @gol
+-Wstrict-overflow=1  @gol
+-Wswitch  @gol
+-Wtrigraphs  @gol
+-Wuninitialized  @gol
+-Wunknown-pragmas  @gol
+-Wunused-function  @gol
+-Wunused-label     @gol
+-Wunused-value     @gol
+-Wunused-variable  @gol
+-Wvolatile-register-var @gol
+}
+
+Note that some warning flags are not implied by @option{-Wall}.  Some of
+them warn about constructions that users generally do not consider
+questionable, but which occasionally you might wish to check for;
+others warn about constructions that are necessary or hard to avoid in
+some cases, and there is no simple way to modify the code to suppress
+the warning. Some of them are enabled by @option{-Wextra} but many of
+them must be enabled individually.
+
+@item -Wextra
+@opindex W
+@opindex Wextra
+@opindex Wno-extra
+This enables some extra warning flags that are not enabled by
+@option{-Wall}. (This option used to be called @option{-W}.  The older
+name is still supported, but the newer name is more descriptive.)
+
+@gccoptlist{-Wclobbered  @gol
+-Wempty-body  @gol
+-Wignored-qualifiers @gol
+-Wmissing-field-initializers  @gol
+-Wmissing-parameter-type @r{(C only)}  @gol
+-Wold-style-declaration @r{(C only)}  @gol
+-Woverride-init  @gol
+-Wsign-compare  @gol
+-Wtype-limits  @gol
+-Wuninitialized  @gol
+-Wunused-parameter @r{(only with} @option{-Wunused} @r{or} @option{-Wall}@r{)}  @gol
+}
+
+The option @option{-Wextra} also prints warning messages for the
+following cases:
+
+@itemize @bullet
+
+@item
+A pointer is compared against integer zero with @samp{<}, @samp{<=},
+@samp{>}, or @samp{>=}.
+
+@item 
+(C++ only) An enumerator and a non-enumerator both appear in a
+conditional expression.
+
+@item 
+(C++ only) Ambiguous virtual bases.
+
+@item 
+(C++ only) Subscripting an array which has been declared @samp{register}.
+
+@item 
+(C++ only) Taking the address of a variable which has been declared
+@samp{register}.
+
+@item 
+(C++ only) A base class is not initialized in a derived class' copy
+constructor.
+
+@end itemize
+
+@item -Wchar-subscripts
+@opindex Wchar-subscripts
+@opindex Wno-char-subscripts
+Warn if an array subscript has type @code{char}.  This is a common cause
+of error, as programmers often forget that this type is signed on some
+machines.
+This warning is enabled by @option{-Wall}.
+
+@item -Wcomment
+@opindex Wcomment
+@opindex Wno-comment
+Warn whenever a comment-start sequence @samp{/*} appears in a @samp{/*}
+comment, or whenever a Backslash-Newline appears in a @samp{//} comment.
+This warning is enabled by @option{-Wall}.
+
+@item -Wformat
+@opindex Wformat
+@opindex Wno-format
+@opindex ffreestanding
+@opindex fno-builtin
+Check calls to @code{printf} and @code{scanf}, etc., to make sure that
+the arguments supplied have types appropriate to the format string
+specified, and that the conversions specified in the format string make
+sense.  This includes standard functions, and others specified by format
+attributes (@pxref{Function Attributes}), in the @code{printf},
+@code{scanf}, @code{strftime} and @code{strfmon} (an X/Open extension,
+not in the C standard) families (or other target-specific families).
+Which functions are checked without format attributes having been
+specified depends on the standard version selected, and such checks of
+functions without the attribute specified are disabled by
+@option{-ffreestanding} or @option{-fno-builtin}.
+
+The formats are checked against the format features supported by GNU
+libc version 2.2.  These include all ISO C90 and C99 features, as well
+as features from the Single Unix Specification and some BSD and GNU
+extensions.  Other library implementations may not support all these
+features; GCC does not support warning about features that go beyond a
+particular library's limitations.  However, if @option{-pedantic} is used
+with @option{-Wformat}, warnings will be given about format features not
+in the selected standard version (but not for @code{strfmon} formats,
+since those are not in any version of the C standard).  @xref{C Dialect
+Options,,Options Controlling C Dialect}.
+
+Since @option{-Wformat} also checks for null format arguments for
+several functions, @option{-Wformat} also implies @option{-Wnonnull}.
+
+@option{-Wformat} is included in @option{-Wall}.  For more control over some
+aspects of format checking, the options @option{-Wformat-y2k},
+@option{-Wno-format-extra-args}, @option{-Wno-format-zero-length},
+@option{-Wformat-nonliteral}, @option{-Wformat-security}, and
+@option{-Wformat=2} are available, but are not included in @option{-Wall}.
+
+@item -Wformat-y2k
+@opindex Wformat-y2k
+@opindex Wno-format-y2k
+If @option{-Wformat} is specified, also warn about @code{strftime}
+formats which may yield only a two-digit year.
+
+@item -Wno-format-contains-nul
+@opindex Wno-format-contains-nul
+@opindex Wformat-contains-nul
+If @option{-Wformat} is specified, do not warn about format strings that
+contain NUL bytes.
+
+@item -Wno-format-extra-args
+@opindex Wno-format-extra-args
+@opindex Wformat-extra-args
+If @option{-Wformat} is specified, do not warn about excess arguments to a
+@code{printf} or @code{scanf} format function.  The C standard specifies
+that such arguments are ignored.
+
+Where the unused arguments lie between used arguments that are
+specified with @samp{$} operand number specifications, normally
+warnings are still given, since the implementation could not know what
+type to pass to @code{va_arg} to skip the unused arguments.  However,
+in the case of @code{scanf} formats, this option will suppress the
+warning if the unused arguments are all pointers, since the Single
+Unix Specification says that such unused arguments are allowed.
+
+@item -Wno-format-zero-length @r{(C and Objective-C only)}
+@opindex Wno-format-zero-length
+@opindex Wformat-zero-length
+If @option{-Wformat} is specified, do not warn about zero-length formats.
+The C standard specifies that zero-length formats are allowed.
+
+@item -Wformat-nonliteral
+@opindex Wformat-nonliteral
+@opindex Wno-format-nonliteral
+If @option{-Wformat} is specified, also warn if the format string is not a
+string literal and so cannot be checked, unless the format function
+takes its format arguments as a @code{va_list}.
+
+@item -Wformat-security
+@opindex Wformat-security
+@opindex Wno-format-security
+If @option{-Wformat} is specified, also warn about uses of format
+functions that represent possible security problems.  At present, this
+warns about calls to @code{printf} and @code{scanf} functions where the
+format string is not a string literal and there are no format arguments,
+as in @code{printf (foo);}.  This may be a security hole if the format
+string came from untrusted input and contains @samp{%n}.  (This is
+currently a subset of what @option{-Wformat-nonliteral} warns about, but
+in future warnings may be added to @option{-Wformat-security} that are not
+included in @option{-Wformat-nonliteral}.)
+
+@item -Wformat=2
+@opindex Wformat=2
+@opindex Wno-format=2
+Enable @option{-Wformat} plus format checks not included in
+@option{-Wformat}.  Currently equivalent to @samp{-Wformat
+-Wformat-nonliteral -Wformat-security -Wformat-y2k}.
+
+@item -Wnonnull @r{(C and Objective-C only)}
+@opindex Wnonnull
+@opindex Wno-nonnull
+Warn about passing a null pointer for arguments marked as
+requiring a non-null value by the @code{nonnull} function attribute.
+
+@option{-Wnonnull} is included in @option{-Wall} and @option{-Wformat}.  It
+can be disabled with the @option{-Wno-nonnull} option.
+
+@item -Winit-self @r{(C, C++, Objective-C and Objective-C++ only)}
+@opindex Winit-self
+@opindex Wno-init-self
+Warn about uninitialized variables which are initialized with themselves.
+Note this option can only be used with the @option{-Wuninitialized} option.
+
+For example, GCC will warn about @code{i} being uninitialized in the
+following snippet only when @option{-Winit-self} has been specified:
+@smallexample
+@group
+int f()
+@{
+  int i = i;
+  return i;
+@}
+@end group
+@end smallexample
+
+@item -Wimplicit-int @r{(C and Objective-C only)}
+@opindex Wimplicit-int
+@opindex Wno-implicit-int
+Warn when a declaration does not specify a type.
+This warning is enabled by @option{-Wall}.
+
+@item -Wimplicit-function-declaration @r{(C and Objective-C only)}
+@opindex Wimplicit-function-declaration
+@opindex Wno-implicit-function-declaration
+Give a warning whenever a function is used before being declared. In
+C99 mode (@option{-std=c99} or @option{-std=gnu99}), this warning is
+enabled by default and it is made into an error by
+@option{-pedantic-errors}. This warning is also enabled by
+@option{-Wall}.
+
+@item -Wimplicit
+@opindex Wimplicit
+@opindex Wno-implicit
+Same as @option{-Wimplicit-int} and @option{-Wimplicit-function-declaration}.
+This warning is enabled by @option{-Wall}.
+
+@item -Wignored-qualifiers @r{(C and C++ only)}
+@opindex Wignored-qualifiers
+@opindex Wno-ignored-qualifiers
+Warn if the return type of a function has a type qualifier
+such as @code{const}.  For ISO C such a type qualifier has no effect,
+since the value returned by a function is not an lvalue.
+For C++, the warning is only emitted for scalar types or @code{void}.
+ISO C prohibits qualified @code{void} return types on function
+definitions, so such return types always receive a warning
+even without this option.
+
+This warning is also enabled by @option{-Wextra}.
+
+@item -Wmain
+@opindex Wmain
+@opindex Wno-main
+Warn if the type of @samp{main} is suspicious.  @samp{main} should be
+a function with external linkage, returning int, taking either zero
+arguments, two, or three arguments of appropriate types.  This warning
+is enabled by default in C++ and is enabled by either @option{-Wall}
+or @option{-pedantic}.
+
+@item -Wmissing-braces
+@opindex Wmissing-braces
+@opindex Wno-missing-braces
+Warn if an aggregate or union initializer is not fully bracketed.  In
+the following example, the initializer for @samp{a} is not fully
+bracketed, but that for @samp{b} is fully bracketed.
+
+@smallexample
+int a[2][2] = @{ 0, 1, 2, 3 @};
+int b[2][2] = @{ @{ 0, 1 @}, @{ 2, 3 @} @};
+@end smallexample
+
+This warning is enabled by @option{-Wall}.
+
+@item -Wmissing-include-dirs @r{(C, C++, Objective-C and Objective-C++ only)}
+@opindex Wmissing-include-dirs
+@opindex Wno-missing-include-dirs
+Warn if a user-supplied include directory does not exist.
+
+@item -Wparentheses
+@opindex Wparentheses
+@opindex Wno-parentheses
+Warn if parentheses are omitted in certain contexts, such
+as when there is an assignment in a context where a truth value
+is expected, or when operators are nested whose precedence people
+often get confused about.
+
+Also warn if a comparison like @samp{x<=y<=z} appears; this is
+equivalent to @samp{(x<=y ? 1 : 0) <= z}, which is a different
+interpretation from that of ordinary mathematical notation.
+
+Also warn about constructions where there may be confusion to which
+@code{if} statement an @code{else} branch belongs.  Here is an example of
+such a case:
+
+@smallexample
+@group
+@{
+  if (a)
+    if (b)
+      foo ();
+  else
+    bar ();
+@}
+@end group
+@end smallexample
+
+In C/C++, every @code{else} branch belongs to the innermost possible
+@code{if} statement, which in this example is @code{if (b)}.  This is
+often not what the programmer expected, as illustrated in the above
+example by indentation the programmer chose.  When there is the
+potential for this confusion, GCC will issue a warning when this flag
+is specified.  To eliminate the warning, add explicit braces around
+the innermost @code{if} statement so there is no way the @code{else}
+could belong to the enclosing @code{if}.  The resulting code would
+look like this:
+
+@smallexample
+@group
+@{
+  if (a)
+    @{
+      if (b)
+        foo ();
+      else
+        bar ();
+    @}
+@}
+@end group
+@end smallexample
+
+This warning is enabled by @option{-Wall}.
+
+@item -Wsequence-point
+@opindex Wsequence-point
+@opindex Wno-sequence-point
+Warn about code that may have undefined semantics because of violations
+of sequence point rules in the C and C++ standards.
+
+The C and C++ standards defines the order in which expressions in a C/C++
+program are evaluated in terms of @dfn{sequence points}, which represent
+a partial ordering between the execution of parts of the program: those
+executed before the sequence point, and those executed after it.  These
+occur after the evaluation of a full expression (one which is not part
+of a larger expression), after the evaluation of the first operand of a
+@code{&&}, @code{||}, @code{? :} or @code{,} (comma) operator, before a
+function is called (but after the evaluation of its arguments and the
+expression denoting the called function), and in certain other places.
+Other than as expressed by the sequence point rules, the order of
+evaluation of subexpressions of an expression is not specified.  All
+these rules describe only a partial order rather than a total order,
+since, for example, if two functions are called within one expression
+with no sequence point between them, the order in which the functions
+are called is not specified.  However, the standards committee have
+ruled that function calls do not overlap.
+
+It is not specified when between sequence points modifications to the
+values of objects take effect.  Programs whose behavior depends on this
+have undefined behavior; the C and C++ standards specify that ``Between
+the previous and next sequence point an object shall have its stored
+value modified at most once by the evaluation of an expression.
+Furthermore, the prior value shall be read only to determine the value
+to be stored.''.  If a program breaks these rules, the results on any
+particular implementation are entirely unpredictable.
+
+Examples of code with undefined behavior are @code{a = a++;}, @code{a[n]
+= b[n++]} and @code{a[i++] = i;}.  Some more complicated cases are not
+diagnosed by this option, and it may give an occasional false positive
+result, but in general it has been found fairly effective at detecting
+this sort of problem in programs.
+
+The standard is worded confusingly, therefore there is some debate
+over the precise meaning of the sequence point rules in subtle cases.
+Links to discussions of the problem, including proposed formal
+definitions, may be found on the GCC readings page, at
+@w{@uref{http://gcc.gnu.org/readings.html}}.
+
+This warning is enabled by @option{-Wall} for C and C++.
+
+@item -Wreturn-type
+@opindex Wreturn-type
+@opindex Wno-return-type
+Warn whenever a function is defined with a return-type that defaults
+to @code{int}.  Also warn about any @code{return} statement with no
+return-value in a function whose return-type is not @code{void}
+(falling off the end of the function body is considered returning
+without a value), and about a @code{return} statement with a
+expression in a function whose return-type is @code{void}.
+
+For C++, a function without return type always produces a diagnostic
+message, even when @option{-Wno-return-type} is specified.  The only
+exceptions are @samp{main} and functions defined in system headers.
+
+This warning is enabled by @option{-Wall}.
+
+@item -Wswitch
+@opindex Wswitch
+@opindex Wno-switch
+Warn whenever a @code{switch} statement has an index of enumerated type
+and lacks a @code{case} for one or more of the named codes of that
+enumeration.  (The presence of a @code{default} label prevents this
+warning.)  @code{case} labels outside the enumeration range also
+provoke warnings when this option is used.
+This warning is enabled by @option{-Wall}.
+
+@item -Wswitch-default
+@opindex Wswitch-default
+@opindex Wno-switch-default
+Warn whenever a @code{switch} statement does not have a @code{default}
+case.
+
+@item -Wswitch-enum
+@opindex Wswitch-enum
+@opindex Wno-switch-enum
+Warn whenever a @code{switch} statement has an index of enumerated type
+and lacks a @code{case} for one or more of the named codes of that
+enumeration.  @code{case} labels outside the enumeration range also
+provoke warnings when this option is used.
+
+@item -Wsync-nand @r{(C and C++ only)}
+@opindex Wsync-nand
+@opindex Wno-sync-nand
+Warn when @code{__sync_fetch_and_nand} and @code{__sync_nand_and_fetch}
+built-in functions are used.  These functions changed semantics in GCC 4.4.
+
+@item -Wtrigraphs
+@opindex Wtrigraphs
+@opindex Wno-trigraphs
+Warn if any trigraphs are encountered that might change the meaning of
+the program (trigraphs within comments are not warned about).
+This warning is enabled by @option{-Wall}.
+
+@item -Wunused-function
+@opindex Wunused-function
+@opindex Wno-unused-function
+Warn whenever a static function is declared but not defined or a
+non-inline static function is unused.
+This warning is enabled by @option{-Wall}.
+
+@item -Wunused-label
+@opindex Wunused-label
+@opindex Wno-unused-label
+Warn whenever a label is declared but not used.
+This warning is enabled by @option{-Wall}.
+
+To suppress this warning use the @samp{unused} attribute
+(@pxref{Variable Attributes}).
+
+@item -Wunused-parameter
+@opindex Wunused-parameter
+@opindex Wno-unused-parameter
+Warn whenever a function parameter is unused aside from its declaration.
+
+To suppress this warning use the @samp{unused} attribute
+(@pxref{Variable Attributes}).
+
+@item -Wunused-variable
+@opindex Wunused-variable
+@opindex Wno-unused-variable
+Warn whenever a local variable or non-constant static variable is unused
+aside from its declaration.
+This warning is enabled by @option{-Wall}.
+
+To suppress this warning use the @samp{unused} attribute
+(@pxref{Variable Attributes}).
+
+@item -Wunused-value
+@opindex Wunused-value
+@opindex Wno-unused-value
+Warn whenever a statement computes a result that is explicitly not
+used. To suppress this warning cast the unused expression to
+@samp{void}. This includes an expression-statement or the left-hand
+side of a comma expression that contains no side effects. For example,
+an expression such as @samp{x[i,j]} will cause a warning, while
+@samp{x[(void)i,j]} will not.
+
+This warning is enabled by @option{-Wall}.
+
+@item -Wunused
+@opindex Wunused
+@opindex Wno-unused
+All the above @option{-Wunused} options combined.
+
+In order to get a warning about an unused function parameter, you must
+either specify @samp{-Wextra -Wunused} (note that @samp{-Wall} implies
+@samp{-Wunused}), or separately specify @option{-Wunused-parameter}.
+
+@item -Wuninitialized
+@opindex Wuninitialized
+@opindex Wno-uninitialized
+Warn if an automatic variable is used without first being initialized
+or if a variable may be clobbered by a @code{setjmp} call. In C++,
+warn if a non-static reference or non-static @samp{const} member
+appears in a class without constructors.
+
+If you want to warn about code which uses the uninitialized value of the
+variable in its own initializer, use the @option{-Winit-self} option.
+
+These warnings occur for individual uninitialized or clobbered
+elements of structure, union or array variables as well as for
+variables which are uninitialized or clobbered as a whole.  They do
+not occur for variables or elements declared @code{volatile}.  Because
+these warnings depend on optimization, the exact variables or elements
+for which there are warnings will depend on the precise optimization
+options and version of GCC used.
+
+Note that there may be no warning about a variable that is used only
+to compute a value that itself is never used, because such
+computations may be deleted by data flow analysis before the warnings
+are printed.
+
+These warnings are made optional because GCC is not smart
+enough to see all the reasons why the code might be correct
+despite appearing to have an error.  Here is one example of how
+this can happen:
+
+@smallexample
+@group
+@{
+  int x;
+  switch (y)
+    @{
+    case 1: x = 1;
+      break;
+    case 2: x = 4;
+      break;
+    case 3: x = 5;
+    @}
+  foo (x);
+@}
+@end group
+@end smallexample
+
+@noindent
+If the value of @code{y} is always 1, 2 or 3, then @code{x} is
+always initialized, but GCC doesn't know this.  Here is
+another common case:
+
+@smallexample
+@{
+  int save_y;
+  if (change_y) save_y = y, y = new_y;
+  @dots{}
+  if (change_y) y = save_y;
+@}
+@end smallexample
+
+@noindent
+This has no bug because @code{save_y} is used only if it is set.
+
+@cindex @code{longjmp} warnings
+This option also warns when a non-volatile automatic variable might be
+changed by a call to @code{longjmp}.  These warnings as well are possible
+only in optimizing compilation.
+
+The compiler sees only the calls to @code{setjmp}.  It cannot know
+where @code{longjmp} will be called; in fact, a signal handler could
+call it at any point in the code.  As a result, you may get a warning
+even when there is in fact no problem because @code{longjmp} cannot
+in fact be called at the place which would cause a problem.
+
+Some spurious warnings can be avoided if you declare all the functions
+you use that never return as @code{noreturn}.  @xref{Function
+Attributes}.
+
+This warning is enabled by @option{-Wall} or @option{-Wextra}.
+
+@item -Wunknown-pragmas
+@opindex Wunknown-pragmas
+@opindex Wno-unknown-pragmas
+@cindex warning for unknown pragmas
+@cindex unknown pragmas, warning
+@cindex pragmas, warning of unknown
+Warn when a #pragma directive is encountered which is not understood by
+GCC@.  If this command line option is used, warnings will even be issued
+for unknown pragmas in system header files.  This is not the case if
+the warnings were only enabled by the @option{-Wall} command line option.
+
+@item -Wno-pragmas
+@opindex Wno-pragmas
+@opindex Wpragmas
+Do not warn about misuses of pragmas, such as incorrect parameters,
+invalid syntax, or conflicts between pragmas.  See also
+@samp{-Wunknown-pragmas}.
+
+@item -Wstrict-aliasing
+@opindex Wstrict-aliasing
+@opindex Wno-strict-aliasing
+This option is only active when @option{-fstrict-aliasing} is active.
+It warns about code which might break the strict aliasing rules that the
+compiler is using for optimization.  The warning does not catch all
+cases, but does attempt to catch the more common pitfalls.  It is
+included in @option{-Wall}.
+It is equivalent to @option{-Wstrict-aliasing=3}
+
+@item -Wstrict-aliasing=n
+@opindex Wstrict-aliasing=n
+@opindex Wno-strict-aliasing=n
+This option is only active when @option{-fstrict-aliasing} is active.
+It warns about code which might break the strict aliasing rules that the
+compiler is using for optimization.
+Higher levels correspond to higher accuracy (fewer false positives).
+Higher levels also correspond to more effort, similar to the way -O works.
+@option{-Wstrict-aliasing} is equivalent to @option{-Wstrict-aliasing=n},
+with n=3.
+
+Level 1: Most aggressive, quick, least accurate.
+Possibly useful when higher levels
+do not warn but -fstrict-aliasing still breaks the code, as it has very few 
+false negatives.  However, it has many false positives.
+Warns for all pointer conversions between possibly incompatible types, 
+even if never dereferenced.  Runs in the frontend only.
+
+Level 2: Aggressive, quick, not too precise.
+May still have many false positives (not as many as level 1 though),
+and few false negatives (but possibly more than level 1).
+Unlike level 1, it only warns when an address is taken.  Warns about
+incomplete types.  Runs in the frontend only.
+
+Level 3 (default for @option{-Wstrict-aliasing}): 
+Should have very few false positives and few false 
+negatives.  Slightly slower than levels 1 or 2 when optimization is enabled.
+Takes care of the common punn+dereference pattern in the frontend:
+@code{*(int*)&some_float}.
+If optimization is enabled, it also runs in the backend, where it deals 
+with multiple statement cases using flow-sensitive points-to information.
+Only warns when the converted pointer is dereferenced.
+Does not warn about incomplete types.
+
+@item -Wstrict-overflow
+@itemx -Wstrict-overflow=@var{n}
+@opindex Wstrict-overflow
+@opindex Wno-strict-overflow
+This option is only active when @option{-fstrict-overflow} is active.
+It warns about cases where the compiler optimizes based on the
+assumption that signed overflow does not occur.  Note that it does not
+warn about all cases where the code might overflow: it only warns
+about cases where the compiler implements some optimization.  Thus
+this warning depends on the optimization level.
+
+An optimization which assumes that signed overflow does not occur is
+perfectly safe if the values of the variables involved are such that
+overflow never does, in fact, occur.  Therefore this warning can
+easily give a false positive: a warning about code which is not
+actually a problem.  To help focus on important issues, several
+warning levels are defined.  No warnings are issued for the use of
+undefined signed overflow when estimating how many iterations a loop
+will require, in particular when determining whether a loop will be
+executed at all.
+
+@table @gcctabopt
+@item -Wstrict-overflow=1
+Warn about cases which are both questionable and easy to avoid.  For
+example: @code{x + 1 > x}; with @option{-fstrict-overflow}, the
+compiler will simplify this to @code{1}.  This level of
+@option{-Wstrict-overflow} is enabled by @option{-Wall}; higher levels
+are not, and must be explicitly requested.
+
+@item -Wstrict-overflow=2
+Also warn about other cases where a comparison is simplified to a
+constant.  For example: @code{abs (x) >= 0}.  This can only be
+simplified when @option{-fstrict-overflow} is in effect, because
+@code{abs (INT_MIN)} overflows to @code{INT_MIN}, which is less than
+zero.  @option{-Wstrict-overflow} (with no level) is the same as
+@option{-Wstrict-overflow=2}.
+
+@item -Wstrict-overflow=3
+Also warn about other cases where a comparison is simplified.  For
+example: @code{x + 1 > 1} will be simplified to @code{x > 0}.
+
+@item -Wstrict-overflow=4
+Also warn about other simplifications not covered by the above cases.
+For example: @code{(x * 10) / 5} will be simplified to @code{x * 2}.
+
+@item -Wstrict-overflow=5
+Also warn about cases where the compiler reduces the magnitude of a
+constant involved in a comparison.  For example: @code{x + 2 > y} will
+be simplified to @code{x + 1 >= y}.  This is reported only at the
+highest warning level because this simplification applies to many
+comparisons, so this warning level will give a very large number of
+false positives.
+@end table
+
+@item -Warray-bounds
+@opindex Wno-array-bounds
+@opindex Warray-bounds
+This option is only active when @option{-ftree-vrp} is active
+(default for -O2 and above). It warns about subscripts to arrays
+that are always out of bounds. This warning is enabled by @option{-Wall}.
+
+@item -Wno-div-by-zero
+@opindex Wno-div-by-zero
+@opindex Wdiv-by-zero
+Do not warn about compile-time integer division by zero.  Floating point
+division by zero is not warned about, as it can be a legitimate way of
+obtaining infinities and NaNs.
+
+@item -Wsystem-headers
+@opindex Wsystem-headers
+@opindex Wno-system-headers
+@cindex warnings from system headers
+@cindex system headers, warnings from
+Print warning messages for constructs found in system header files.
+Warnings from system headers are normally suppressed, on the assumption
+that they usually do not indicate real problems and would only make the
+compiler output harder to read.  Using this command line option tells
+GCC to emit warnings from system headers as if they occurred in user
+code.  However, note that using @option{-Wall} in conjunction with this
+option will @emph{not} warn about unknown pragmas in system
+headers---for that, @option{-Wunknown-pragmas} must also be used.
+
+@item -Wfloat-equal
+@opindex Wfloat-equal
+@opindex Wno-float-equal
+Warn if floating point values are used in equality comparisons.
+
+The idea behind this is that sometimes it is convenient (for the
+programmer) to consider floating-point values as approximations to
+infinitely precise real numbers.  If you are doing this, then you need
+to compute (by analyzing the code, or in some other way) the maximum or
+likely maximum error that the computation introduces, and allow for it
+when performing comparisons (and when producing output, but that's a
+different problem).  In particular, instead of testing for equality, you
+would check to see whether the two values have ranges that overlap; and
+this is done with the relational operators, so equality comparisons are
+probably mistaken.
+
+@item -Wtraditional @r{(C and Objective-C only)}
+@opindex Wtraditional
+@opindex Wno-traditional
+Warn about certain constructs that behave differently in traditional and
+ISO C@.  Also warn about ISO C constructs that have no traditional C
+equivalent, and/or problematic constructs which should be avoided.
+
+@itemize @bullet
+@item
+Macro parameters that appear within string literals in the macro body.
+In traditional C macro replacement takes place within string literals,
+but does not in ISO C@.
+
+@item
+In traditional C, some preprocessor directives did not exist.
+Traditional preprocessors would only consider a line to be a directive
+if the @samp{#} appeared in column 1 on the line.  Therefore
+@option{-Wtraditional} warns about directives that traditional C
+understands but would ignore because the @samp{#} does not appear as the
+first character on the line.  It also suggests you hide directives like
+@samp{#pragma} not understood by traditional C by indenting them.  Some
+traditional implementations would not recognize @samp{#elif}, so it
+suggests avoiding it altogether.
+
+@item
+A function-like macro that appears without arguments.
+
+@item
+The unary plus operator.
+
+@item
+The @samp{U} integer constant suffix, or the @samp{F} or @samp{L} floating point
+constant suffixes.  (Traditional C does support the @samp{L} suffix on integer
+constants.)  Note, these suffixes appear in macros defined in the system
+headers of most modern systems, e.g.@: the @samp{_MIN}/@samp{_MAX} macros in @code{<limits.h>}.
+Use of these macros in user code might normally lead to spurious
+warnings, however GCC's integrated preprocessor has enough context to
+avoid warning in these cases.
+
+@item
+A function declared external in one block and then used after the end of
+the block.
+
+@item
+A @code{switch} statement has an operand of type @code{long}.
+
+@item
+A non-@code{static} function declaration follows a @code{static} one.
+This construct is not accepted by some traditional C compilers.
+
+@item
+The ISO type of an integer constant has a different width or
+signedness from its traditional type.  This warning is only issued if
+the base of the constant is ten.  I.e.@: hexadecimal or octal values, which
+typically represent bit patterns, are not warned about.
+
+@item
+Usage of ISO string concatenation is detected.
+
+@item
+Initialization of automatic aggregates.
+
+@item
+Identifier conflicts with labels.  Traditional C lacks a separate
+namespace for labels.
+
+@item
+Initialization of unions.  If the initializer is zero, the warning is
+omitted.  This is done under the assumption that the zero initializer in
+user code appears conditioned on e.g.@: @code{__STDC__} to avoid missing
+initializer warnings and relies on default initialization to zero in the
+traditional C case.
+
+@item
+Conversions by prototypes between fixed/floating point values and vice
+versa.  The absence of these prototypes when compiling with traditional
+C would cause serious problems.  This is a subset of the possible
+conversion warnings, for the full set use @option{-Wtraditional-conversion}.
+
+@item
+Use of ISO C style function definitions.  This warning intentionally is
+@emph{not} issued for prototype declarations or variadic functions
+because these ISO C features will appear in your code when using
+libiberty's traditional C compatibility macros, @code{PARAMS} and
+@code{VPARAMS}.  This warning is also bypassed for nested functions
+because that feature is already a GCC extension and thus not relevant to
+traditional C compatibility.
+@end itemize
+
+@item -Wtraditional-conversion @r{(C and Objective-C only)}
+@opindex Wtraditional-conversion
+@opindex Wno-traditional-conversion
+Warn if a prototype causes a type conversion that is different from what
+would happen to the same argument in the absence of a prototype.  This
+includes conversions of fixed point to floating and vice versa, and
+conversions changing the width or signedness of a fixed point argument
+except when the same as the default promotion.
+
+@item -Wdeclaration-after-statement @r{(C and Objective-C only)}
+@opindex Wdeclaration-after-statement
+@opindex Wno-declaration-after-statement
+Warn when a declaration is found after a statement in a block.  This
+construct, known from C++, was introduced with ISO C99 and is by default
+allowed in GCC@.  It is not supported by ISO C90 and was not supported by
+GCC versions before GCC 3.0.  @xref{Mixed Declarations}.
+
+@item -Wundef
+@opindex Wundef
+@opindex Wno-undef
+Warn if an undefined identifier is evaluated in an @samp{#if} directive.
+
+@item -Wno-endif-labels
+@opindex Wno-endif-labels
+@opindex Wendif-labels
+Do not warn whenever an @samp{#else} or an @samp{#endif} are followed by text.
+
+@item -Wshadow
+@opindex Wshadow
+@opindex Wno-shadow
+Warn whenever a local variable shadows another local variable, parameter or
+global variable or whenever a built-in function is shadowed.
+
+@item -Wlarger-than=@var{len}
+@opindex Wlarger-than=@var{len}
+@opindex Wlarger-than-@var{len}
+Warn whenever an object of larger than @var{len} bytes is defined.
+
+@item -Wframe-larger-than=@var{len}
+@opindex Wframe-larger-than
+Warn if the size of a function frame is larger than @var{len} bytes.
+The computation done to determine the stack frame size is approximate
+and not conservative.
+The actual requirements may be somewhat greater than @var{len}
+even if you do not get a warning.  In addition, any space allocated
+via @code{alloca}, variable-length arrays, or related constructs
+is not included by the compiler when determining
+whether or not to issue a warning.
+
+@item -Wunsafe-loop-optimizations
+@opindex Wunsafe-loop-optimizations
+@opindex Wno-unsafe-loop-optimizations
+Warn if the loop cannot be optimized because the compiler could not
+assume anything on the bounds of the loop indices.  With
+@option{-funsafe-loop-optimizations} warn if the compiler made
+such assumptions.
+
+@item -Wno-pedantic-ms-format @r{(MinGW targets only)}
+@opindex Wno-pedantic-ms-format
+@opindex Wpedantic-ms-format
+Disables the warnings about non-ISO @code{printf} / @code{scanf} format
+width specifiers @code{I32}, @code{I64}, and @code{I} used on Windows targets
+depending on the MS runtime, when you are using the options @option{-Wformat}
+and @option{-pedantic} without gnu-extensions.
+
+@item -Wpointer-arith
+@opindex Wpointer-arith
+@opindex Wno-pointer-arith
+Warn about anything that depends on the ``size of'' a function type or
+of @code{void}.  GNU C assigns these types a size of 1, for
+convenience in calculations with @code{void *} pointers and pointers
+to functions.  In C++, warn also when an arithmetic operation involves
+@code{NULL}.  This warning is also enabled by @option{-pedantic}.
+
+@item -Wtype-limits
+@opindex Wtype-limits
+@opindex Wno-type-limits
+Warn if a comparison is always true or always false due to the limited
+range of the data type, but do not warn for constant expressions.  For
+example, warn if an unsigned variable is compared against zero with
+@samp{<} or @samp{>=}.  This warning is also enabled by
+@option{-Wextra}.
+
+@item -Wbad-function-cast @r{(C and Objective-C only)}
+@opindex Wbad-function-cast
+@opindex Wno-bad-function-cast
+Warn whenever a function call is cast to a non-matching type.
+For example, warn if @code{int malloc()} is cast to @code{anything *}.
+
+@item -Wc++-compat @r{(C and Objective-C only)}
+Warn about ISO C constructs that are outside of the common subset of
+ISO C and ISO C++, e.g.@: request for implicit conversion from
+@code{void *} to a pointer to non-@code{void} type.
+
+@item -Wc++0x-compat @r{(C++ and Objective-C++ only)}
+Warn about C++ constructs whose meaning differs between ISO C++ 1998 and
+ISO C++ 200x, e.g., identifiers in ISO C++ 1998 that will become keywords
+in ISO C++ 200x.  This warning is enabled by @option{-Wall}.
+
+@item -Wcast-qual
+@opindex Wcast-qual
+@opindex Wno-cast-qual
+Warn whenever a pointer is cast so as to remove a type qualifier from
+the target type.  For example, warn if a @code{const char *} is cast
+to an ordinary @code{char *}.
+
+@item -Wcast-align
+@opindex Wcast-align
+@opindex Wno-cast-align
+Warn whenever a pointer is cast such that the required alignment of the
+target is increased.  For example, warn if a @code{char *} is cast to
+an @code{int *} on machines where integers can only be accessed at
+two- or four-byte boundaries.
+
+@item -Wwrite-strings
+@opindex Wwrite-strings
+@opindex Wno-write-strings
+When compiling C, give string constants the type @code{const
+char[@var{length}]} so that copying the address of one into a
+non-@code{const} @code{char *} pointer will get a warning.  These
+warnings will help you find at compile time code that can try to write
+into a string constant, but only if you have been very careful about
+using @code{const} in declarations and prototypes.  Otherwise, it will
+just be a nuisance. This is why we did not make @option{-Wall} request
+these warnings.
+
+When compiling C++, warn about the deprecated conversion from string
+literals to @code{char *}.  This warning is enabled by default for C++
+programs.
+
+@item -Wclobbered
+@opindex Wclobbered
+@opindex Wno-clobbered
+Warn for variables that might be changed by @samp{longjmp} or
+@samp{vfork}.  This warning is also enabled by @option{-Wextra}.
+
+@item -Wconversion
+@opindex Wconversion
+@opindex Wno-conversion
+Warn for implicit conversions that may alter a value. This includes
+conversions between real and integer, like @code{abs (x)} when
+@code{x} is @code{double}; conversions between signed and unsigned,
+like @code{unsigned ui = -1}; and conversions to smaller types, like
+@code{sqrtf (M_PI)}. Do not warn for explicit casts like @code{abs
+((int) x)} and @code{ui = (unsigned) -1}, or if the value is not
+changed by the conversion like in @code{abs (2.0)}.  Warnings about
+conversions between signed and unsigned integers can be disabled by
+using @option{-Wno-sign-conversion}.
+
+For C++, also warn for conversions between @code{NULL} and non-pointer
+types; confusing overload resolution for user-defined conversions; and
+conversions that will never use a type conversion operator:
+conversions to @code{void}, the same type, a base class or a reference
+to them. Warnings about conversions between signed and unsigned
+integers are disabled by default in C++ unless
+@option{-Wsign-conversion} is explicitly enabled.
+
+@item -Wempty-body
+@opindex Wempty-body
+@opindex Wno-empty-body
+Warn if an empty body occurs in an @samp{if}, @samp{else} or @samp{do
+while} statement.  This warning is also enabled by @option{-Wextra}.
+
+@item -Wenum-compare @r{(C++ and Objective-C++ only)}
+@opindex Wenum-compare
+@opindex Wno-enum-compare
+Warn about a comparison between values of different enum types. This
+warning is enabled by default.
+
+@item -Wsign-compare
+@opindex Wsign-compare
+@opindex Wno-sign-compare
+@cindex warning for comparison of signed and unsigned values
+@cindex comparison of signed and unsigned values, warning
+@cindex signed and unsigned values, comparison warning
+Warn when a comparison between signed and unsigned values could produce
+an incorrect result when the signed value is converted to unsigned.
+This warning is also enabled by @option{-Wextra}; to get the other warnings
+of @option{-Wextra} without this warning, use @samp{-Wextra -Wno-sign-compare}.
+
+@item -Wsign-conversion
+@opindex Wsign-conversion
+@opindex Wno-sign-conversion
+Warn for implicit conversions that may change the sign of an integer
+value, like assigning a signed integer expression to an unsigned
+integer variable. An explicit cast silences the warning. In C, this
+option is enabled also by @option{-Wconversion}.
+
+@item -Waddress
+@opindex Waddress
+@opindex Wno-address
+Warn about suspicious uses of memory addresses. These include using
+the address of a function in a conditional expression, such as
+@code{void func(void); if (func)}, and comparisons against the memory
+address of a string literal, such as @code{if (x == "abc")}.  Such
+uses typically indicate a programmer error: the address of a function
+always evaluates to true, so their use in a conditional usually
+indicate that the programmer forgot the parentheses in a function
+call; and comparisons against string literals result in unspecified
+behavior and are not portable in C, so they usually indicate that the
+programmer intended to use @code{strcmp}.  This warning is enabled by
+@option{-Wall}.
+
+@item -Wlogical-op
+@opindex Wlogical-op
+@opindex Wno-logical-op
+Warn about suspicious uses of logical operators in expressions.
+This includes using logical operators in contexts where a
+bit-wise operator is likely to be expected.
+
+@item -Waggregate-return
+@opindex Waggregate-return
+@opindex Wno-aggregate-return
+Warn if any functions that return structures or unions are defined or
+called.  (In languages where you can return an array, this also elicits
+a warning.)
+
+@item -Wno-attributes
+@opindex Wno-attributes
+@opindex Wattributes
+Do not warn if an unexpected @code{__attribute__} is used, such as
+unrecognized attributes, function attributes applied to variables,
+etc.  This will not stop errors for incorrect use of supported
+attributes.
+
+@item -Wno-builtin-macro-redefined
+@opindex Wno-builtin-macro-redefined
+@opindex Wbuiltin-macro-redefined
+Do not warn if certain built-in macros are redefined.  This suppresses
+warnings for redefinition of @code{__TIMESTAMP__}, @code{__TIME__},
+@code{__DATE__}, @code{__FILE__}, and @code{__BASE_FILE__}.
+
+@item -Wstrict-prototypes @r{(C and Objective-C only)}
+@opindex Wstrict-prototypes
+@opindex Wno-strict-prototypes
+Warn if a function is declared or defined without specifying the
+argument types.  (An old-style function definition is permitted without
+a warning if preceded by a declaration which specifies the argument
+types.)
+
+@item -Wold-style-declaration @r{(C and Objective-C only)}
+@opindex Wold-style-declaration
+@opindex Wno-old-style-declaration
+Warn for obsolescent usages, according to the C Standard, in a
+declaration. For example, warn if storage-class specifiers like
+@code{static} are not the first things in a declaration.  This warning
+is also enabled by @option{-Wextra}.
+
+@item -Wold-style-definition @r{(C and Objective-C only)}
+@opindex Wold-style-definition
+@opindex Wno-old-style-definition
+Warn if an old-style function definition is used.  A warning is given
+even if there is a previous prototype.
+
+@item -Wmissing-parameter-type @r{(C and Objective-C only)}
+@opindex Wmissing-parameter-type
+@opindex Wno-missing-parameter-type
+A function parameter is declared without a type specifier in K&R-style
+functions:
+
+@smallexample
+void foo(bar) @{ @}
+@end smallexample
+
+This warning is also enabled by @option{-Wextra}.
+
+@item -Wmissing-prototypes @r{(C and Objective-C only)}
+@opindex Wmissing-prototypes
+@opindex Wno-missing-prototypes
+Warn if a global function is defined without a previous prototype
+declaration.  This warning is issued even if the definition itself
+provides a prototype.  The aim is to detect global functions that fail
+to be declared in header files.
+
+@item -Wmissing-declarations
+@opindex Wmissing-declarations
+@opindex Wno-missing-declarations
+Warn if a global function is defined without a previous declaration.
+Do so even if the definition itself provides a prototype.
+Use this option to detect global functions that are not declared in
+header files.  In C++, no warnings are issued for function templates,
+or for inline functions, or for functions in anonymous namespaces.
+
+@item -Wmissing-field-initializers
+@opindex Wmissing-field-initializers
+@opindex Wno-missing-field-initializers
+@opindex W
+@opindex Wextra
+@opindex Wno-extra
+Warn if a structure's initializer has some fields missing.  For
+example, the following code would cause such a warning, because
+@code{x.h} is implicitly zero:
+
+@smallexample
+struct s @{ int f, g, h; @};
+struct s x = @{ 3, 4 @};
+@end smallexample
+
+This option does not warn about designated initializers, so the following
+modification would not trigger a warning:
+
+@smallexample
+struct s @{ int f, g, h; @};
+struct s x = @{ .f = 3, .g = 4 @};
+@end smallexample
+
+This warning is included in @option{-Wextra}.  To get other @option{-Wextra}
+warnings without this one, use @samp{-Wextra -Wno-missing-field-initializers}.
+
+@item -Wmissing-noreturn
+@opindex Wmissing-noreturn
+@opindex Wno-missing-noreturn
+Warn about functions which might be candidates for attribute @code{noreturn}.
+Note these are only possible candidates, not absolute ones.  Care should
+be taken to manually verify functions actually do not ever return before
+adding the @code{noreturn} attribute, otherwise subtle code generation
+bugs could be introduced.  You will not get a warning for @code{main} in
+hosted C environments.
+
+@item -Wmissing-format-attribute
+@opindex Wmissing-format-attribute
+@opindex Wno-missing-format-attribute
+@opindex Wformat
+@opindex Wno-format
+Warn about function pointers which might be candidates for @code{format}
+attributes.  Note these are only possible candidates, not absolute ones.
+GCC will guess that function pointers with @code{format} attributes that
+are used in assignment, initialization, parameter passing or return
+statements should have a corresponding @code{format} attribute in the
+resulting type.  I.e.@: the left-hand side of the assignment or
+initialization, the type of the parameter variable, or the return type
+of the containing function respectively should also have a @code{format}
+attribute to avoid the warning.
+
+GCC will also warn about function definitions which might be
+candidates for @code{format} attributes.  Again, these are only
+possible candidates.  GCC will guess that @code{format} attributes
+might be appropriate for any function that calls a function like
+@code{vprintf} or @code{vscanf}, but this might not always be the
+case, and some functions for which @code{format} attributes are
+appropriate may not be detected.
+
+@item -Wno-multichar
+@opindex Wno-multichar
+@opindex Wmultichar
+Do not warn if a multicharacter constant (@samp{'FOOF'}) is used.
+Usually they indicate a typo in the user's code, as they have
+implementation-defined values, and should not be used in portable code.
+
+@item -Wnormalized=<none|id|nfc|nfkc>
+@opindex Wnormalized=
+@cindex NFC
+@cindex NFKC
+@cindex character set, input normalization
+In ISO C and ISO C++, two identifiers are different if they are
+different sequences of characters.  However, sometimes when characters
+outside the basic ASCII character set are used, you can have two
+different character sequences that look the same.  To avoid confusion,
+the ISO 10646 standard sets out some @dfn{normalization rules} which
+when applied ensure that two sequences that look the same are turned into
+the same sequence.  GCC can warn you if you are using identifiers which
+have not been normalized; this option controls that warning.
+
+There are four levels of warning that GCC supports.  The default is
+@option{-Wnormalized=nfc}, which warns about any identifier which is
+not in the ISO 10646 ``C'' normalized form, @dfn{NFC}.  NFC is the
+recommended form for most uses.
+
+Unfortunately, there are some characters which ISO C and ISO C++ allow
+in identifiers that when turned into NFC aren't allowable as
+identifiers.  That is, there's no way to use these symbols in portable
+ISO C or C++ and have all your identifiers in NFC@.
+@option{-Wnormalized=id} suppresses the warning for these characters.
+It is hoped that future versions of the standards involved will correct
+this, which is why this option is not the default.
+
+You can switch the warning off for all characters by writing
+@option{-Wnormalized=none}.  You would only want to do this if you
+were using some other normalization scheme (like ``D''), because
+otherwise you can easily create bugs that are literally impossible to see.
+
+Some characters in ISO 10646 have distinct meanings but look identical
+in some fonts or display methodologies, especially once formatting has
+been applied.  For instance @code{\u207F}, ``SUPERSCRIPT LATIN SMALL
+LETTER N'', will display just like a regular @code{n} which has been
+placed in a superscript.  ISO 10646 defines the @dfn{NFKC}
+normalization scheme to convert all these into a standard form as
+well, and GCC will warn if your code is not in NFKC if you use
+@option{-Wnormalized=nfkc}.  This warning is comparable to warning
+about every identifier that contains the letter O because it might be
+confused with the digit 0, and so is not the default, but may be
+useful as a local coding convention if the programming environment is
+unable to be fixed to display these characters distinctly.
+
+@item -Wno-deprecated
+@opindex Wno-deprecated
+@opindex Wdeprecated
+Do not warn about usage of deprecated features.  @xref{Deprecated Features}.
+
+@item -Wno-deprecated-declarations
+@opindex Wno-deprecated-declarations
+@opindex Wdeprecated-declarations
+Do not warn about uses of functions (@pxref{Function Attributes}),
+variables (@pxref{Variable Attributes}), and types (@pxref{Type
+Attributes}) marked as deprecated by using the @code{deprecated}
+attribute.
+
+@item -Wno-overflow
+@opindex Wno-overflow
+@opindex Woverflow
+Do not warn about compile-time overflow in constant expressions.
+
+@item -Woverride-init @r{(C and Objective-C only)}
+@opindex Woverride-init
+@opindex Wno-override-init
+@opindex W
+@opindex Wextra
+@opindex Wno-extra
+Warn if an initialized field without side effects is overridden when
+using designated initializers (@pxref{Designated Inits, , Designated
+Initializers}).
+
+This warning is included in @option{-Wextra}.  To get other
+@option{-Wextra} warnings without this one, use @samp{-Wextra
+-Wno-override-init}.
+
+@item -Wpacked
+@opindex Wpacked
+@opindex Wno-packed
+Warn if a structure is given the packed attribute, but the packed
+attribute has no effect on the layout or size of the structure.
+Such structures may be mis-aligned for little benefit.  For
+instance, in this code, the variable @code{f.x} in @code{struct bar}
+will be misaligned even though @code{struct bar} does not itself
+have the packed attribute:
+
+@smallexample
+@group
+struct foo @{
+  int x;
+  char a, b, c, d;
+@} __attribute__((packed));
+struct bar @{
+  char z;
+  struct foo f;
+@};
+@end group
+@end smallexample
+
+@item -Wpacked-bitfield-compat
+@opindex Wpacked-bitfield-compat
+@opindex Wno-packed-bitfield-compat
+The 4.1, 4.2 and 4.3 series of GCC ignore the @code{packed} attribute
+on bit-fields of type @code{char}.  This has been fixed in GCC 4.4 but
+the change can lead to differences in the structure layout.  GCC
+informs you when the offset of such a field has changed in GCC 4.4.
+For example there is no longer a 4-bit padding between field @code{a}
+and @code{b} in this structure:
+
+@smallexample
+struct foo
+@{
+  char a:4;
+  char b:8;
+@} __attribute__ ((packed));
+@end smallexample
+
+This warning is enabled by default.  Use
+@option{-Wno-packed-bitfield-compat} to disable this warning.
+
+@item -Wpadded
+@opindex Wpadded
+@opindex Wno-padded
+Warn if padding is included in a structure, either to align an element
+of the structure or to align the whole structure.  Sometimes when this
+happens it is possible to rearrange the fields of the structure to
+reduce the padding and so make the structure smaller.
+
+@item -Wredundant-decls
+@opindex Wredundant-decls
+@opindex Wno-redundant-decls
+Warn if anything is declared more than once in the same scope, even in
+cases where multiple declaration is valid and changes nothing.
+
+@item -Wnested-externs @r{(C and Objective-C only)}
+@opindex Wnested-externs
+@opindex Wno-nested-externs
+Warn if an @code{extern} declaration is encountered within a function.
+
+@item -Wunreachable-code
+@opindex Wunreachable-code
+@opindex Wno-unreachable-code
+Warn if the compiler detects that code will never be executed.
+
+This option is intended to warn when the compiler detects that at
+least a whole line of source code will never be executed, because
+some condition is never satisfied or because it is after a
+procedure that never returns.
+
+It is possible for this option to produce a warning even though there
+are circumstances under which part of the affected line can be executed,
+so care should be taken when removing apparently-unreachable code.
+
+For instance, when a function is inlined, a warning may mean that the
+line is unreachable in only one inlined copy of the function.
+
+This option is not made part of @option{-Wall} because in a debugging
+version of a program there is often substantial code which checks
+correct functioning of the program and is, hopefully, unreachable
+because the program does work.  Another common use of unreachable
+code is to provide behavior which is selectable at compile-time.
+
+@item -Winline
+@opindex Winline
+@opindex Wno-inline
+Warn if a function can not be inlined and it was declared as inline.
+Even with this option, the compiler will not warn about failures to
+inline functions declared in system headers.
+
+The compiler uses a variety of heuristics to determine whether or not
+to inline a function.  For example, the compiler takes into account
+the size of the function being inlined and the amount of inlining
+that has already been done in the current function.  Therefore,
+seemingly insignificant changes in the source program can cause the
+warnings produced by @option{-Winline} to appear or disappear.
+
+@item -Wno-invalid-offsetof @r{(C++ and Objective-C++ only)}
+@opindex Wno-invalid-offsetof
+@opindex Winvalid-offsetof
+Suppress warnings from applying the @samp{offsetof} macro to a non-POD
+type.  According to the 1998 ISO C++ standard, applying @samp{offsetof}
+to a non-POD type is undefined.  In existing C++ implementations,
+however, @samp{offsetof} typically gives meaningful results even when
+applied to certain kinds of non-POD types. (Such as a simple
+@samp{struct} that fails to be a POD type only by virtue of having a
+constructor.)  This flag is for users who are aware that they are
+writing nonportable code and who have deliberately chosen to ignore the
+warning about it.
+
+The restrictions on @samp{offsetof} may be relaxed in a future version
+of the C++ standard.
+
+@item -Wno-int-to-pointer-cast @r{(C and Objective-C only)}
+@opindex Wno-int-to-pointer-cast
+@opindex Wint-to-pointer-cast
+Suppress warnings from casts to pointer type of an integer of a
+different size.
+
+@item -Wno-pointer-to-int-cast @r{(C and Objective-C only)}
+@opindex Wno-pointer-to-int-cast
+@opindex Wpointer-to-int-cast
+Suppress warnings from casts from a pointer to an integer type of a
+different size.
+
+@item -Winvalid-pch
+@opindex Winvalid-pch
+@opindex Wno-invalid-pch
+Warn if a precompiled header (@pxref{Precompiled Headers}) is found in
+the search path but can't be used.
+
+@item -Wlong-long
+@opindex Wlong-long
+@opindex Wno-long-long
+Warn if @samp{long long} type is used.  This is default.  To inhibit
+the warning messages, use @option{-Wno-long-long}.  Flags
+@option{-Wlong-long} and @option{-Wno-long-long} are taken into account
+only when @option{-pedantic} flag is used.
+
+@item -Wvariadic-macros
+@opindex Wvariadic-macros
+@opindex Wno-variadic-macros
+Warn if variadic macros are used in pedantic ISO C90 mode, or the GNU
+alternate syntax when in pedantic ISO C99 mode.  This is default.
+To inhibit the warning messages, use @option{-Wno-variadic-macros}.
+
+@item -Wvla
+@opindex Wvla
+@opindex Wno-vla
+Warn if variable length array is used in the code.
+@option{-Wno-vla} will prevent the @option{-pedantic} warning of
+the variable length array.
+
+@item -Wvolatile-register-var
+@opindex Wvolatile-register-var
+@opindex Wno-volatile-register-var
+Warn if a register variable is declared volatile.  The volatile
+modifier does not inhibit all optimizations that may eliminate reads
+and/or writes to register variables.  This warning is enabled by
+@option{-Wall}.
+
+@item -Wdisabled-optimization
+@opindex Wdisabled-optimization
+@opindex Wno-disabled-optimization
+Warn if a requested optimization pass is disabled.  This warning does
+not generally indicate that there is anything wrong with your code; it
+merely indicates that GCC's optimizers were unable to handle the code
+effectively.  Often, the problem is that your code is too big or too
+complex; GCC will refuse to optimize programs when the optimization
+itself is likely to take inordinate amounts of time.
+
+@item -Wpointer-sign @r{(C and Objective-C only)}
+@opindex Wpointer-sign
+@opindex Wno-pointer-sign
+Warn for pointer argument passing or assignment with different signedness.
+This option is only supported for C and Objective-C@.  It is implied by
+@option{-Wall} and by @option{-pedantic}, which can be disabled with
+@option{-Wno-pointer-sign}.
+
+@item -Wstack-protector
+@opindex Wstack-protector
+@opindex Wno-stack-protector
+This option is only active when @option{-fstack-protector} is active.  It
+warns about functions that will not be protected against stack smashing.
+
+@item -Wno-mudflap
+@opindex Wno-mudflap
+Suppress warnings about constructs that cannot be instrumented by
+@option{-fmudflap}.
+
+@item -Woverlength-strings
+@opindex Woverlength-strings
+@opindex Wno-overlength-strings
+Warn about string constants which are longer than the ``minimum
+maximum'' length specified in the C standard.  Modern compilers
+generally allow string constants which are much longer than the
+standard's minimum limit, but very portable programs should avoid
+using longer strings.
+
+The limit applies @emph{after} string constant concatenation, and does
+not count the trailing NUL@.  In C89, the limit was 509 characters; in
+C99, it was raised to 4095.  C++98 does not specify a normative
+minimum maximum, so we do not diagnose overlength strings in C++@.
+
+This option is implied by @option{-pedantic}, and can be disabled with
+@option{-Wno-overlength-strings}.
+@end table
+
+@node Debugging Options
+@section Options for Debugging Your Program or GCC
+@cindex options, debugging
+@cindex debugging information options
+
+GCC has various special options that are used for debugging
+either your program or GCC:
+
+@table @gcctabopt
+@item -g
+@opindex g
+Produce debugging information in the operating system's native format
+(stabs, COFF, XCOFF, or DWARF 2)@.  GDB can work with this debugging
+information.
+
+On most systems that use stabs format, @option{-g} enables use of extra
+debugging information that only GDB can use; this extra information
+makes debugging work better in GDB but will probably make other debuggers
+crash or
+refuse to read the program.  If you want to control for certain whether
+to generate the extra information, use @option{-gstabs+}, @option{-gstabs},
+@option{-gxcoff+}, @option{-gxcoff}, or @option{-gvms} (see below).
+
+GCC allows you to use @option{-g} with
+@option{-O}.  The shortcuts taken by optimized code may occasionally
+produce surprising results: some variables you declared may not exist
+at all; flow of control may briefly move where you did not expect it;
+some statements may not be executed because they compute constant
+results or their values were already at hand; some statements may
+execute in different places because they were moved out of loops.
+
+Nevertheless it proves possible to debug optimized output.  This makes
+it reasonable to use the optimizer for programs that might have bugs.
+
+The following options are useful when GCC is generated with the
+capability for more than one debugging format.
+
+@item -ggdb
+@opindex ggdb
+Produce debugging information for use by GDB@.  This means to use the
+most expressive format available (DWARF 2, stabs, or the native format
+if neither of those are supported), including GDB extensions if at all
+possible.
+
+@item -gstabs
+@opindex gstabs
+Produce debugging information in stabs format (if that is supported),
+without GDB extensions.  This is the format used by DBX on most BSD
+systems.  On MIPS, Alpha and System V Release 4 systems this option
+produces stabs debugging output which is not understood by DBX or SDB@.
+On System V Release 4 systems this option requires the GNU assembler.
+
+@item -feliminate-unused-debug-symbols
+@opindex feliminate-unused-debug-symbols
+Produce debugging information in stabs format (if that is supported),
+for only symbols that are actually used.
+
+@item -femit-class-debug-always
+Instead of emitting debugging information for a C++ class in only one
+object file, emit it in all object files using the class.  This option
+should be used only with debuggers that are unable to handle the way GCC
+normally emits debugging information for classes because using this
+option will increase the size of debugging information by as much as a
+factor of two.
+
+@item -gstabs+
+@opindex gstabs+
+Produce debugging information in stabs format (if that is supported),
+using GNU extensions understood only by the GNU debugger (GDB)@.  The
+use of these extensions is likely to make other debuggers crash or
+refuse to read the program.
+
+@item -gcoff
+@opindex gcoff
+Produce debugging information in COFF format (if that is supported).
+This is the format used by SDB on most System V systems prior to
+System V Release 4.
+
+@item -gxcoff
+@opindex gxcoff
+Produce debugging information in XCOFF format (if that is supported).
+This is the format used by the DBX debugger on IBM RS/6000 systems.
+
+@item -gxcoff+
+@opindex gxcoff+
+Produce debugging information in XCOFF format (if that is supported),
+using GNU extensions understood only by the GNU debugger (GDB)@.  The
+use of these extensions is likely to make other debuggers crash or
+refuse to read the program, and may cause assemblers other than the GNU
+assembler (GAS) to fail with an error.
+
+@item -gdwarf-2
+@opindex gdwarf-2
+Produce debugging information in DWARF version 2 format (if that is
+supported).  This is the format used by DBX on IRIX 6.  With this
+option, GCC uses features of DWARF version 3 when they are useful;
+version 3 is upward compatible with version 2, but may still cause
+problems for older debuggers.
+
+@item -gvms
+@opindex gvms
+Produce debugging information in VMS debug format (if that is
+supported).  This is the format used by DEBUG on VMS systems.
+
+@item -g@var{level}
+@itemx -ggdb@var{level}
+@itemx -gstabs@var{level}
+@itemx -gcoff@var{level}
+@itemx -gxcoff@var{level}
+@itemx -gvms@var{level}
+Request debugging information and also use @var{level} to specify how
+much information.  The default level is 2.
+
+Level 0 produces no debug information at all.  Thus, @option{-g0} negates
+@option{-g}.
+
+Level 1 produces minimal information, enough for making backtraces in
+parts of the program that you don't plan to debug.  This includes
+descriptions of functions and external variables, but no information
+about local variables and no line numbers.
+
+Level 3 includes extra information, such as all the macro definitions
+present in the program.  Some debuggers support macro expansion when
+you use @option{-g3}.
+
+@option{-gdwarf-2} does not accept a concatenated debug level, because
+GCC used to support an option @option{-gdwarf} that meant to generate
+debug information in version 1 of the DWARF format (which is very
+different from version 2), and it would have been too confusing.  That
+debug format is long obsolete, but the option cannot be changed now.
+Instead use an additional @option{-g@var{level}} option to change the
+debug level for DWARF2.
+
+@item -feliminate-dwarf2-dups
+@opindex feliminate-dwarf2-dups
+Compress DWARF2 debugging information by eliminating duplicated
+information about each symbol.  This option only makes sense when
+generating DWARF2 debugging information with @option{-gdwarf-2}.
+
+@item -femit-struct-debug-baseonly
+Emit debug information for struct-like types
+only when the base name of the compilation source file
+matches the base name of file in which the struct was defined.
+
+This option substantially reduces the size of debugging information,
+but at significant potential loss in type information to the debugger.
+See @option{-femit-struct-debug-reduced} for a less aggressive option.
+See @option{-femit-struct-debug-detailed} for more detailed control.
+
+This option works only with DWARF 2.
+
+@item -femit-struct-debug-reduced
+Emit debug information for struct-like types
+only when the base name of the compilation source file
+matches the base name of file in which the type was defined,
+unless the struct is a template or defined in a system header.
+
+This option significantly reduces the size of debugging information,
+with some potential loss in type information to the debugger.
+See @option{-femit-struct-debug-baseonly} for a more aggressive option.
+See @option{-femit-struct-debug-detailed} for more detailed control.
+
+This option works only with DWARF 2.
+
+@item -femit-struct-debug-detailed@r{[}=@var{spec-list}@r{]}
+Specify the struct-like types
+for which the compiler will generate debug information.
+The intent is to reduce duplicate struct debug information
+between different object files within the same program.
+
+This option is a detailed version of
+@option{-femit-struct-debug-reduced} and @option{-femit-struct-debug-baseonly},
+which will serve for most needs.
+
+A specification has the syntax
+[@samp{dir:}|@samp{ind:}][@samp{ord:}|@samp{gen:}](@samp{any}|@samp{sys}|@samp{base}|@samp{none})
+
+The optional first word limits the specification to
+structs that are used directly (@samp{dir:}) or used indirectly (@samp{ind:}).
+A struct type is used directly when it is the type of a variable, member.
+Indirect uses arise through pointers to structs.
+That is, when use of an incomplete struct would be legal, the use is indirect.
+An example is
+@samp{struct one direct; struct two * indirect;}.
+
+The optional second word limits the specification to
+ordinary structs (@samp{ord:}) or generic structs (@samp{gen:}).
+Generic structs are a bit complicated to explain.
+For C++, these are non-explicit specializations of template classes,
+or non-template classes within the above.
+Other programming languages have generics,
+but @samp{-femit-struct-debug-detailed} does not yet implement them.
+
+The third word specifies the source files for those
+structs for which the compiler will emit debug information.
+The values @samp{none} and @samp{any} have the normal meaning.
+The value @samp{base} means that
+the base of name of the file in which the type declaration appears
+must match the base of the name of the main compilation file.
+In practice, this means that
+types declared in @file{foo.c} and @file{foo.h} will have debug information,
+but types declared in other header will not.
+The value @samp{sys} means those types satisfying @samp{base}
+or declared in system or compiler headers.
+
+You may need to experiment to determine the best settings for your application.
+
+The default is @samp{-femit-struct-debug-detailed=all}.
+
+This option works only with DWARF 2.
+
+@item -fno-merge-debug-strings
+@opindex fmerge-debug-strings
+@opindex fno-merge-debug-strings
+Direct the linker to not merge together strings in the debugging
+information which are identical in different object files.  Merging is
+not supported by all assemblers or linkers.  Merging decreases the size
+of the debug information in the output file at the cost of increasing
+link processing time.  Merging is enabled by default.
+
+@item -fdebug-prefix-map=@var{old}=@var{new}
+@opindex fdebug-prefix-map
+When compiling files in directory @file{@var{old}}, record debugging
+information describing them as in @file{@var{new}} instead.
+
+@item -fno-dwarf2-cfi-asm
+@opindex fdwarf2-cfi-asm
+@opindex fno-dwarf2-cfi-asm
+Emit DWARF 2 unwind info as compiler generated @code{.eh_frame} section
+instead of using GAS @code{.cfi_*} directives.
+
+@cindex @command{prof}
+@item -p
+@opindex p
+Generate extra code to write profile information suitable for the
+analysis program @command{prof}.  You must use this option when compiling
+the source files you want data about, and you must also use it when
+linking.
+
+@cindex @command{gprof}
+@item -pg
+@opindex pg
+Generate extra code to write profile information suitable for the
+analysis program @command{gprof}.  You must use this option when compiling
+the source files you want data about, and you must also use it when
+linking.
+
+@item -Q
+@opindex Q
+Makes the compiler print out each function name as it is compiled, and
+print some statistics about each pass when it finishes.
+
+@item -ftime-report
+@opindex ftime-report
+Makes the compiler print some statistics about the time consumed by each
+pass when it finishes.
+
+@item -fmem-report
+@opindex fmem-report
+Makes the compiler print some statistics about permanent memory
+allocation when it finishes.
+
+@item -fpre-ipa-mem-report
+@opindex fpre-ipa-mem-report
+@item -fpost-ipa-mem-report
+@opindex fpost-ipa-mem-report
+Makes the compiler print some statistics about permanent memory
+allocation before or after interprocedural optimization.
+
+@item -fprofile-arcs
+@opindex fprofile-arcs
+Add code so that program flow @dfn{arcs} are instrumented.  During
+execution the program records how many times each branch and call is
+executed and how many times it is taken or returns.  When the compiled
+program exits it saves this data to a file called
+@file{@var{auxname}.gcda} for each source file.  The data may be used for
+profile-directed optimizations (@option{-fbranch-probabilities}), or for
+test coverage analysis (@option{-ftest-coverage}).  Each object file's
+@var{auxname} is generated from the name of the output file, if
+explicitly specified and it is not the final executable, otherwise it is
+the basename of the source file.  In both cases any suffix is removed
+(e.g.@: @file{foo.gcda} for input file @file{dir/foo.c}, or
+@file{dir/foo.gcda} for output file specified as @option{-o dir/foo.o}).
+@xref{Cross-profiling}.
+
+@cindex @command{gcov}
+@item --coverage
+@opindex coverage
+
+This option is used to compile and link code instrumented for coverage
+analysis.  The option is a synonym for @option{-fprofile-arcs}
+@option{-ftest-coverage} (when compiling) and @option{-lgcov} (when
+linking).  See the documentation for those options for more details.
+
+@itemize
+
+@item
+Compile the source files with @option{-fprofile-arcs} plus optimization
+and code generation options.  For test coverage analysis, use the
+additional @option{-ftest-coverage} option.  You do not need to profile
+every source file in a program.
+
+@item
+Link your object files with @option{-lgcov} or @option{-fprofile-arcs}
+(the latter implies the former).
+
+@item
+Run the program on a representative workload to generate the arc profile
+information.  This may be repeated any number of times.  You can run
+concurrent instances of your program, and provided that the file system
+supports locking, the data files will be correctly updated.  Also
+@code{fork} calls are detected and correctly handled (double counting
+will not happen).
+
+@item
+For profile-directed optimizations, compile the source files again with
+the same optimization and code generation options plus
+@option{-fbranch-probabilities} (@pxref{Optimize Options,,Options that
+Control Optimization}).
+
+@item
+For test coverage analysis, use @command{gcov} to produce human readable
+information from the @file{.gcno} and @file{.gcda} files.  Refer to the
+@command{gcov} documentation for further information.
+
+@end itemize
+
+With @option{-fprofile-arcs}, for each function of your program GCC
+creates a program flow graph, then finds a spanning tree for the graph.
+Only arcs that are not on the spanning tree have to be instrumented: the
+compiler adds code to count the number of times that these arcs are
+executed.  When an arc is the only exit or only entrance to a block, the
+instrumentation code can be added to the block; otherwise, a new basic
+block must be created to hold the instrumentation code.
+
+@need 2000
+@item -ftest-coverage
+@opindex ftest-coverage
+Produce a notes file that the @command{gcov} code-coverage utility
+(@pxref{Gcov,, @command{gcov}---a Test Coverage Program}) can use to
+show program coverage.  Each source file's note file is called
+@file{@var{auxname}.gcno}.  Refer to the @option{-fprofile-arcs} option
+above for a description of @var{auxname} and instructions on how to
+generate test coverage data.  Coverage data will match the source files
+more closely, if you do not optimize.
+
+@item -fdbg-cnt-list
+@opindex fdbg-cnt-list
+Print the name and the counter upperbound for all debug counters.
+
+@item -fdbg-cnt=@var{counter-value-list}
+@opindex fdbg-cnt
+Set the internal debug counter upperbound. @var{counter-value-list} 
+is a comma-separated list of @var{name}:@var{value} pairs
+which sets the upperbound of each debug counter @var{name} to @var{value}.
+All debug counters have the initial upperbound of @var{UINT_MAX},
+thus dbg_cnt() returns true always unless the upperbound is set by this option.
+e.g. With -fdbg-cnt=dce:10,tail_call:0
+dbg_cnt(dce) will return true only for first 10 invocations
+and dbg_cnt(tail_call) will return false always.
+
+@item -d@var{letters}
+@itemx -fdump-rtl-@var{pass}
+@opindex d
+Says to make debugging dumps during compilation at times specified by
+@var{letters}.    This is used for debugging the RTL-based passes of the
+compiler.  The file names for most of the dumps are made by appending a
+pass number and a word to the @var{dumpname}.  @var{dumpname} is generated
+from the name of the output file, if explicitly specified and it is not
+an executable, otherwise it is the basename of the source file. These
+switches may have different effects when @option{-E} is used for
+preprocessing.
+
+Debug dumps can be enabled with a @option{-fdump-rtl} switch or some
+@option{-d} option @var{letters}.  Here are the possible
+letters for use in @var{pass} and @var{letters}, and their meanings:
+
+@table @gcctabopt
+
+@item -fdump-rtl-alignments
+@opindex fdump-rtl-alignments
+Dump after branch alignments have been computed.
+
+@item -fdump-rtl-asmcons
+@opindex fdump-rtl-asmcons
+Dump after fixing rtl statements that have unsatisfied in/out constraints.
+
+@item -fdump-rtl-auto_inc_dec
+@opindex fdump-rtl-auto_inc_dec
+Dump after auto-inc-dec discovery.  This pass is only run on
+architectures that have auto inc or auto dec instructions.
+
+@item -fdump-rtl-barriers
+@opindex fdump-rtl-barriers
+Dump after cleaning up the barrier instructions.
+
+@item -fdump-rtl-bbpart
+@opindex fdump-rtl-bbpart
+Dump after partitioning hot and cold basic blocks.
+
+@item -fdump-rtl-bbro
+@opindex fdump-rtl-bbro
+Dump after block reordering.
+
+@item -fdump-rtl-btl1
+@itemx -fdump-rtl-btl2
+@opindex fdump-rtl-btl2
+@opindex fdump-rtl-btl2
+@option{-fdump-rtl-btl1} and @option{-fdump-rtl-btl2} enable dumping
+after the two branch
+target load optimization passes.
+
+@item -fdump-rtl-bypass
+@opindex fdump-rtl-bypass
+Dump after jump bypassing and control flow optimizations.
+
+@item -fdump-rtl-combine
+@opindex fdump-rtl-combine
+Dump after the RTL instruction combination pass.
+
+@item -fdump-rtl-compgotos
+@opindex fdump-rtl-compgotos
+Dump after duplicating the computed gotos.
+
+@item -fdump-rtl-ce1
+@itemx -fdump-rtl-ce2
+@itemx -fdump-rtl-ce3
+@opindex fdump-rtl-ce1
+@opindex fdump-rtl-ce2
+@opindex fdump-rtl-ce3
+@option{-fdump-rtl-ce1}, @option{-fdump-rtl-ce2}, and
+@option{-fdump-rtl-ce3} enable dumping after the three
+if conversion passes. 
+
+@itemx -fdump-rtl-cprop_hardreg
+@opindex fdump-rtl-cprop_hardreg
+Dump after hard register copy propagation.
+
+@itemx -fdump-rtl-csa
+@opindex fdump-rtl-csa
+Dump after combining stack adjustments.
+
+@item -fdump-rtl-cse1
+@itemx -fdump-rtl-cse2
+@opindex fdump-rtl-cse1
+@opindex fdump-rtl-cse2
+@option{-fdump-rtl-cse1} and @option{-fdump-rtl-cse2} enable dumping after
+the two common sub-expression elimination passes.
+
+@itemx -fdump-rtl-dce
+@opindex fdump-rtl-dce
+Dump after the standalone dead code elimination passes.
+
+@itemx -fdump-rtl-dbr
+@opindex fdump-rtl-dbr
+Dump after delayed branch scheduling.
+
+@item -fdump-rtl-dce1
+@itemx -fdump-rtl-dce2
+@opindex fdump-rtl-dce1
+@opindex fdump-rtl-dce2
+@option{-fdump-rtl-dce1} and @option{-fdump-rtl-dce2} enable dumping after
+the two dead store elimination passes.
+
+@item -fdump-rtl-eh
+@opindex fdump-rtl-eh
+Dump after finalization of EH handling code.
+
+@item -fdump-rtl-eh_ranges
+@opindex fdump-rtl-eh_ranges
+Dump after conversion of EH handling range regions.
+
+@item -fdump-rtl-expand
+@opindex fdump-rtl-expand
+Dump after RTL generation.
+
+@item -fdump-rtl-fwprop1
+@itemx -fdump-rtl-fwprop2
+@opindex fdump-rtl-fwprop1
+@opindex fdump-rtl-fwprop2
+@option{-fdump-rtl-fwprop1} and @option{-fdump-rtl-fwprop2} enable
+dumping after the two forward propagation passes.
+
+@item -fdump-rtl-gcse1
+@itemx -fdump-rtl-gcse2
+@opindex fdump-rtl-gcse1
+@opindex fdump-rtl-gcse2
+@option{-fdump-rtl-gcse1} and @option{-fdump-rtl-gcse2} enable dumping
+after global common subexpression elimination.
+
+@item -fdump-rtl-init-regs
+@opindex fdump-rtl-init-regs
+Dump after the initialization of the registers.
+
+@item -fdump-rtl-initvals
+@opindex fdump-rtl-initvals
+Dump after the computation of the initial value sets.
+
+@itemx -fdump-rtl-into_cfglayout
+@opindex fdump-rtl-into_cfglayout
+Dump after converting to cfglayout mode.
+
+@item -fdump-rtl-ira
+@opindex fdump-rtl-ira
+Dump after iterated register allocation.
+
+@item -fdump-rtl-jump
+@opindex fdump-rtl-jump
+Dump after the second jump optimization.
+
+@item -fdump-rtl-loop2
+@opindex fdump-rtl-loop2
+@option{-fdump-rtl-loop2} enables dumping after the rtl
+loop optimization passes.
+
+@item -fdump-rtl-mach
+@opindex fdump-rtl-mach
+Dump after performing the machine dependent reorganization pass, if that
+pass exists.
+
+@item -fdump-rtl-mode_sw
+@opindex fdump-rtl-mode_sw
+Dump after removing redundant mode switches.
+
+@item -fdump-rtl-rnreg
+@opindex fdump-rtl-rnreg
+Dump after register renumbering.
+
+@itemx -fdump-rtl-outof_cfglayout
+@opindex fdump-rtl-outof_cfglayout
+Dump after converting from cfglayout mode.
+
+@item -fdump-rtl-peephole2
+@opindex fdump-rtl-peephole2
+Dump after the peephole pass.
+
+@item -fdump-rtl-postreload
+@opindex fdump-rtl-postreload
+Dump after post-reload optimizations.
+
+@itemx -fdump-rtl-pro_and_epilogue
+@opindex fdump-rtl-pro_and_epilogue
+Dump after generating the function pro and epilogues.
+
+@item -fdump-rtl-regmove
+@opindex fdump-rtl-regmove
+Dump after the register move pass.
+
+@item -fdump-rtl-sched1
+@itemx -fdump-rtl-sched2
+@opindex fdump-rtl-sched1
+@opindex fdump-rtl-sched2
+@option{-fdump-rtl-sched1} and @option{-fdump-rtl-sched2} enable dumping
+after the basic block scheduling passes.
+
+@item -fdump-rtl-see
+@opindex fdump-rtl-see
+Dump after sign extension elimination.
+
+@item -fdump-rtl-seqabstr
+@opindex fdump-rtl-seqabstr
+Dump after common sequence discovery. 
+
+@item -fdump-rtl-shorten
+@opindex fdump-rtl-shorten
+Dump after shortening branches.
+
+@item -fdump-rtl-sibling
+@opindex fdump-rtl-sibling
+Dump after sibling call optimizations.
+
+@item -fdump-rtl-split1
+@itemx -fdump-rtl-split2
+@itemx -fdump-rtl-split3
+@itemx -fdump-rtl-split4
+@itemx -fdump-rtl-split5
+@opindex fdump-rtl-split1
+@opindex fdump-rtl-split2
+@opindex fdump-rtl-split3
+@opindex fdump-rtl-split4
+@opindex fdump-rtl-split5
+@option{-fdump-rtl-split1}, @option{-fdump-rtl-split2},
+@option{-fdump-rtl-split3}, @option{-fdump-rtl-split4} and
+@option{-fdump-rtl-split5} enable dumping after five rounds of
+instruction splitting.
+
+@item -fdump-rtl-sms
+@opindex fdump-rtl-sms
+Dump after modulo scheduling.  This pass is only run on some
+architectures.
+
+@item -fdump-rtl-stack
+@opindex fdump-rtl-stack
+Dump after conversion from GCC's "flat register file" registers to the
+x87's stack-like registers.  This pass is only run on x86 variants.
+
+@item -fdump-rtl-subreg1
+@itemx -fdump-rtl-subreg2
+@opindex fdump-rtl-subreg1
+@opindex fdump-rtl-subreg2
+@option{-fdump-rtl-subreg1} and @option{-fdump-rtl-subreg2} enable dumping after
+the two subreg expansion passes.
+
+@item -fdump-rtl-unshare
+@opindex fdump-rtl-unshare
+Dump after all rtl has been unshared.
+
+@item -fdump-rtl-vartrack
+@opindex fdump-rtl-vartrack
+Dump after variable tracking.
+
+@item -fdump-rtl-vregs
+@opindex fdump-rtl-vregs
+Dump after converting virtual registers to hard registers.
+
+@item -fdump-rtl-web
+@opindex fdump-rtl-web
+Dump after live range splitting.
+
+@item -fdump-rtl-regclass
+@itemx -fdump-rtl-subregs_of_mode_init
+@itemx -fdump-rtl-subregs_of_mode_finish
+@itemx -fdump-rtl-dfinit
+@itemx -fdump-rtl-dfinish
+@opindex fdump-rtl-regclass
+@opindex fdump-rtl-subregs_of_mode_init
+@opindex fdump-rtl-subregs_of_mode_finish
+@opindex fdump-rtl-dfinit
+@opindex fdump-rtl-dfinish
+These dumps are defined but always produce empty files.
+
+@item -fdump-rtl-all
+@opindex fdump-rtl-all
+Produce all the dumps listed above.
+
+@item -dA
+@opindex dA
+Annotate the assembler output with miscellaneous debugging information.
+
+@item -dD
+@opindex dD
+Dump all macro definitions, at the end of preprocessing, in addition to
+normal output.
+
+@item -dH
+@opindex dH
+Produce a core dump whenever an error occurs.
+
+@item -dm
+@opindex dm
+Print statistics on memory usage, at the end of the run, to
+standard error.
+
+@item -dp
+@opindex dp
+Annotate the assembler output with a comment indicating which
+pattern and alternative was used.  The length of each instruction is
+also printed.
+
+@item -dP
+@opindex dP
+Dump the RTL in the assembler output as a comment before each instruction.
+Also turns on @option{-dp} annotation.
+
+@item -dv
+@opindex dv
+For each of the other indicated dump files (@option{-fdump-rtl-@var{pass}}),
+dump a representation of the control flow graph suitable for viewing with VCG
+to @file{@var{file}.@var{pass}.vcg}.
+
+@item -dx
+@opindex dx
+Just generate RTL for a function instead of compiling it.  Usually used
+with @option{-fdump-rtl-expand}.
+
+@item -dy
+@opindex dy
+Dump debugging information during parsing, to standard error.
+@end table
+
+@item -fdump-noaddr
+@opindex fdump-noaddr
+When doing debugging dumps, suppress address output.  This makes it more
+feasible to use diff on debugging dumps for compiler invocations with
+different compiler binaries and/or different
+text / bss / data / heap / stack / dso start locations.
+
+@item -fdump-unnumbered
+@opindex fdump-unnumbered
+When doing debugging dumps, suppress instruction numbers and address output.
+This makes it more feasible to use diff on debugging dumps for compiler
+invocations with different options, in particular with and without
+@option{-g}.
+
+@item -fdump-translation-unit @r{(C++ only)}
+@itemx -fdump-translation-unit-@var{options} @r{(C++ only)}
+@opindex fdump-translation-unit
+Dump a representation of the tree structure for the entire translation
+unit to a file.  The file name is made by appending @file{.tu} to the
+source file name.  If the @samp{-@var{options}} form is used, @var{options}
+controls the details of the dump as described for the
+@option{-fdump-tree} options.
+
+@item -fdump-class-hierarchy @r{(C++ only)}
+@itemx -fdump-class-hierarchy-@var{options} @r{(C++ only)}
+@opindex fdump-class-hierarchy
+Dump a representation of each class's hierarchy and virtual function
+table layout to a file.  The file name is made by appending @file{.class}
+to the source file name.  If the @samp{-@var{options}} form is used,
+@var{options} controls the details of the dump as described for the
+@option{-fdump-tree} options.
+
+@item -fdump-ipa-@var{switch}
+@opindex fdump-ipa
+Control the dumping at various stages of inter-procedural analysis
+language tree to a file.  The file name is generated by appending a switch
+specific suffix to the source file name.  The following dumps are possible:
+
+@table @samp
+@item all
+Enables all inter-procedural analysis dumps.
+
+@item cgraph
+Dumps information about call-graph optimization, unused function removal,
+and inlining decisions.
+
+@item inline
+Dump after function inlining.
+
+@end table
+
+@item -fdump-statistics-@var{option}
+@opindex -fdump-statistics
+Enable and control dumping of pass statistics in a separate file.  The
+file name is generated by appending a suffix ending in @samp{.statistics}
+to the source file name.  If the @samp{-@var{option}} form is used,
+@samp{-stats} will cause counters to be summed over the whole compilation unit
+while @samp{-details} will dump every event as the passes generate them.
+The default with no option is to sum counters for each function compiled.
+
+@item -fdump-tree-@var{switch}
+@itemx -fdump-tree-@var{switch}-@var{options}
+@opindex fdump-tree
+Control the dumping at various stages of processing the intermediate
+language tree to a file.  The file name is generated by appending a switch
+specific suffix to the source file name.  If the @samp{-@var{options}}
+form is used, @var{options} is a list of @samp{-} separated options that
+control the details of the dump.  Not all options are applicable to all
+dumps, those which are not meaningful will be ignored.  The following
+options are available
+
+@table @samp
+@item address
+Print the address of each node.  Usually this is not meaningful as it
+changes according to the environment and source file.  Its primary use
+is for tying up a dump file with a debug environment.
+@item slim
+Inhibit dumping of members of a scope or body of a function merely
+because that scope has been reached.  Only dump such items when they
+are directly reachable by some other path.  When dumping pretty-printed
+trees, this option inhibits dumping the bodies of control structures.
+@item raw
+Print a raw representation of the tree.  By default, trees are
+pretty-printed into a C-like representation.
+@item details
+Enable more detailed dumps (not honored by every dump option).
+@item stats
+Enable dumping various statistics about the pass (not honored by every dump
+option).
+@item blocks
+Enable showing basic block boundaries (disabled in raw dumps).
+@item vops
+Enable showing virtual operands for every statement.
+@item lineno
+Enable showing line numbers for statements.
+@item uid
+Enable showing the unique ID (@code{DECL_UID}) for each variable.
+@item verbose
+Enable showing the tree dump for each statement.
+@item all
+Turn on all options, except @option{raw}, @option{slim}, @option{verbose}
+and @option{lineno}.
+@end table
+
+The following tree dumps are possible:
+@table @samp
+
+@item original
+Dump before any tree based optimization, to @file{@var{file}.original}.
+
+@item optimized
+Dump after all tree based optimization, to @file{@var{file}.optimized}.
+
+@item gimple
+@opindex fdump-tree-gimple
+Dump each function before and after the gimplification pass to a file.  The
+file name is made by appending @file{.gimple} to the source file name.
+
+@item cfg
+@opindex fdump-tree-cfg
+Dump the control flow graph of each function to a file.  The file name is
+made by appending @file{.cfg} to the source file name.
+
+@item vcg
+@opindex fdump-tree-vcg
+Dump the control flow graph of each function to a file in VCG format.  The
+file name is made by appending @file{.vcg} to the source file name.  Note
+that if the file contains more than one function, the generated file cannot
+be used directly by VCG@.  You will need to cut and paste each function's
+graph into its own separate file first.
+
+@item ch
+@opindex fdump-tree-ch
+Dump each function after copying loop headers.  The file name is made by
+appending @file{.ch} to the source file name.
+
+@item ssa
+@opindex fdump-tree-ssa
+Dump SSA related information to a file.  The file name is made by appending
+@file{.ssa} to the source file name.
+
+@item alias
+@opindex fdump-tree-alias
+Dump aliasing information for each function.  The file name is made by
+appending @file{.alias} to the source file name.
+
+@item ccp
+@opindex fdump-tree-ccp
+Dump each function after CCP@.  The file name is made by appending
+@file{.ccp} to the source file name.
+
+@item storeccp
+@opindex fdump-tree-storeccp
+Dump each function after STORE-CCP@.  The file name is made by appending
+@file{.storeccp} to the source file name.
+
+@item pre
+@opindex fdump-tree-pre
+Dump trees after partial redundancy elimination.  The file name is made
+by appending @file{.pre} to the source file name.
+
+@item fre
+@opindex fdump-tree-fre
+Dump trees after full redundancy elimination.  The file name is made
+by appending @file{.fre} to the source file name.
+
+@item copyprop
+@opindex fdump-tree-copyprop
+Dump trees after copy propagation.  The file name is made
+by appending @file{.copyprop} to the source file name.
+
+@item store_copyprop
+@opindex fdump-tree-store_copyprop
+Dump trees after store copy-propagation.  The file name is made
+by appending @file{.store_copyprop} to the source file name.
+
+@item dce
+@opindex fdump-tree-dce
+Dump each function after dead code elimination.  The file name is made by
+appending @file{.dce} to the source file name.
+
+@item mudflap
+@opindex fdump-tree-mudflap
+Dump each function after adding mudflap instrumentation.  The file name is
+made by appending @file{.mudflap} to the source file name.
+
+@item sra
+@opindex fdump-tree-sra
+Dump each function after performing scalar replacement of aggregates.  The
+file name is made by appending @file{.sra} to the source file name.
+
+@item sink
+@opindex fdump-tree-sink
+Dump each function after performing code sinking.  The file name is made
+by appending @file{.sink} to the source file name.
+
+@item dom
+@opindex fdump-tree-dom
+Dump each function after applying dominator tree optimizations.  The file
+name is made by appending @file{.dom} to the source file name.
+
+@item dse
+@opindex fdump-tree-dse
+Dump each function after applying dead store elimination.  The file
+name is made by appending @file{.dse} to the source file name.
+
+@item phiopt
+@opindex fdump-tree-phiopt
+Dump each function after optimizing PHI nodes into straightline code.  The file
+name is made by appending @file{.phiopt} to the source file name.
+
+@item forwprop
+@opindex fdump-tree-forwprop
+Dump each function after forward propagating single use variables.  The file
+name is made by appending @file{.forwprop} to the source file name.
+
+@item copyrename
+@opindex fdump-tree-copyrename
+Dump each function after applying the copy rename optimization.  The file
+name is made by appending @file{.copyrename} to the source file name.
+
+@item nrv
+@opindex fdump-tree-nrv
+Dump each function after applying the named return value optimization on
+generic trees.  The file name is made by appending @file{.nrv} to the source
+file name.
+
+@item vect
+@opindex fdump-tree-vect
+Dump each function after applying vectorization of loops.  The file name is
+made by appending @file{.vect} to the source file name.
+
+@item vrp
+@opindex fdump-tree-vrp
+Dump each function after Value Range Propagation (VRP).  The file name
+is made by appending @file{.vrp} to the source file name.
+
+@item all
+@opindex fdump-tree-all
+Enable all the available tree dumps with the flags provided in this option.
+@end table
+
+@item -ftree-vectorizer-verbose=@var{n}
+@opindex ftree-vectorizer-verbose
+This option controls the amount of debugging output the vectorizer prints.
+This information is written to standard error, unless
+@option{-fdump-tree-all} or @option{-fdump-tree-vect} is specified,
+in which case it is output to the usual dump listing file, @file{.vect}.
+For @var{n}=0 no diagnostic information is reported.
+If @var{n}=1 the vectorizer reports each loop that got vectorized,
+and the total number of loops that got vectorized.
+If @var{n}=2 the vectorizer also reports non-vectorized loops that passed
+the first analysis phase (vect_analyze_loop_form) - i.e.@: countable,
+inner-most, single-bb, single-entry/exit loops.  This is the same verbosity
+level that @option{-fdump-tree-vect-stats} uses.
+Higher verbosity levels mean either more information dumped for each
+reported loop, or same amount of information reported for more loops:
+If @var{n}=3, alignment related information is added to the reports.
+If @var{n}=4, data-references related information (e.g.@: memory dependences,
+memory access-patterns) is added to the reports.
+If @var{n}=5, the vectorizer reports also non-vectorized inner-most loops
+that did not pass the first analysis phase (i.e., may not be countable, or
+may have complicated control-flow).
+If @var{n}=6, the vectorizer reports also non-vectorized nested loops.
+For @var{n}=7, all the information the vectorizer generates during its
+analysis and transformation is reported.  This is the same verbosity level
+that @option{-fdump-tree-vect-details} uses.
+
+@item -frandom-seed=@var{string}
+@opindex frandom-string
+This option provides a seed that GCC uses when it would otherwise use
+random numbers.  It is used to generate certain symbol names
+that have to be different in every compiled file.  It is also used to
+place unique stamps in coverage data files and the object files that
+produce them.  You can use the @option{-frandom-seed} option to produce
+reproducibly identical object files.
+
+The @var{string} should be different for every file you compile.
+
+@item -fsched-verbose=@var{n}
+@opindex fsched-verbose
+On targets that use instruction scheduling, this option controls the
+amount of debugging output the scheduler prints.  This information is
+written to standard error, unless @option{-fdump-rtl-sched1} or
+@option{-fdump-rtl-sched2} is specified, in which case it is output
+to the usual dump listing file, @file{.sched} or @file{.sched2}
+respectively.  However for @var{n} greater than nine, the output is
+always printed to standard error.
+
+For @var{n} greater than zero, @option{-fsched-verbose} outputs the
+same information as @option{-fdump-rtl-sched1} and @option{-fdump-rtl-sched2}.
+For @var{n} greater than one, it also output basic block probabilities,
+detailed ready list information and unit/insn info.  For @var{n} greater
+than two, it includes RTL at abort point, control-flow and regions info.
+And for @var{n} over four, @option{-fsched-verbose} also includes
+dependence info.
+
+@item -save-temps
+@opindex save-temps
+Store the usual ``temporary'' intermediate files permanently; place them
+in the current directory and name them based on the source file.  Thus,
+compiling @file{foo.c} with @samp{-c -save-temps} would produce files
+@file{foo.i} and @file{foo.s}, as well as @file{foo.o}.  This creates a
+preprocessed @file{foo.i} output file even though the compiler now
+normally uses an integrated preprocessor.
+
+When used in combination with the @option{-x} command line option,
+@option{-save-temps} is sensible enough to avoid over writing an
+input source file with the same extension as an intermediate file.
+The corresponding intermediate file may be obtained by renaming the
+source file before using @option{-save-temps}.
+
+@item -time
+@opindex time
+Report the CPU time taken by each subprocess in the compilation
+sequence.  For C source files, this is the compiler proper and assembler
+(plus the linker if linking is done).  The output looks like this:
+
+@smallexample
+# cc1 0.12 0.01
+# as 0.00 0.01
+@end smallexample
+
+The first number on each line is the ``user time'', that is time spent
+executing the program itself.  The second number is ``system time'',
+time spent executing operating system routines on behalf of the program.
+Both numbers are in seconds.
+
+@item -fvar-tracking
+@opindex fvar-tracking
+Run variable tracking pass.  It computes where variables are stored at each
+position in code.  Better debugging information is then generated
+(if the debugging information format supports this information).
+
+It is enabled by default when compiling with optimization (@option{-Os},
+@option{-O}, @option{-O2}, @dots{}), debugging information (@option{-g}) and
+the debug info format supports it.
+
+@item -print-file-name=@var{library}
+@opindex print-file-name
+Print the full absolute name of the library file @var{library} that
+would be used when linking---and don't do anything else.  With this
+option, GCC does not compile or link anything; it just prints the
+file name.
+
+@item -print-multi-directory
+@opindex print-multi-directory
+Print the directory name corresponding to the multilib selected by any
+other switches present in the command line.  This directory is supposed
+to exist in @env{GCC_EXEC_PREFIX}.
+
+@item -print-multi-lib
+@opindex print-multi-lib
+Print the mapping from multilib directory names to compiler switches
+that enable them.  The directory name is separated from the switches by
+@samp{;}, and each switch starts with an @samp{@@} instead of the
+@samp{-}, without spaces between multiple switches.  This is supposed to
+ease shell-processing.
+
+@item -print-prog-name=@var{program}
+@opindex print-prog-name
+Like @option{-print-file-name}, but searches for a program such as @samp{cpp}.
+
+@item -print-libgcc-file-name
+@opindex print-libgcc-file-name
+Same as @option{-print-file-name=libgcc.a}.
+
+This is useful when you use @option{-nostdlib} or @option{-nodefaultlibs}
+but you do want to link with @file{libgcc.a}.  You can do
+
+@smallexample
+gcc -nostdlib @var{files}@dots{} `gcc -print-libgcc-file-name`
+@end smallexample
+
+@item -print-search-dirs
+@opindex print-search-dirs
+Print the name of the configured installation directory and a list of
+program and library directories @command{gcc} will search---and don't do anything else.
+
+This is useful when @command{gcc} prints the error message
+@samp{installation problem, cannot exec cpp0: No such file or directory}.
+To resolve this you either need to put @file{cpp0} and the other compiler
+components where @command{gcc} expects to find them, or you can set the environment
+variable @env{GCC_EXEC_PREFIX} to the directory where you installed them.
+Don't forget the trailing @samp{/}.
+@xref{Environment Variables}.
+
+@item -print-sysroot
+@opindex print-sysroot
+Print the target sysroot directory that will be used during
+compilation.  This is the target sysroot specified either at configure
+time or using the @option{--sysroot} option, possibly with an extra
+suffix that depends on compilation options.  If no target sysroot is
+specified, the option prints nothing.
+
+@item -print-sysroot-headers-suffix
+@opindex print-sysroot-headers-suffix
+Print the suffix added to the target sysroot when searching for
+headers, or give an error if the compiler is not configured with such
+a suffix---and don't do anything else.
+
+@item -dumpmachine
+@opindex dumpmachine
+Print the compiler's target machine (for example,
+@samp{i686-pc-linux-gnu})---and don't do anything else.
+
+@item -dumpversion
+@opindex dumpversion
+Print the compiler version (for example, @samp{3.0})---and don't do
+anything else.
+
+@item -dumpspecs
+@opindex dumpspecs
+Print the compiler's built-in specs---and don't do anything else.  (This
+is used when GCC itself is being built.)  @xref{Spec Files}.
+
+@item -feliminate-unused-debug-types
+@opindex feliminate-unused-debug-types
+Normally, when producing DWARF2 output, GCC will emit debugging
+information for all types declared in a compilation
+unit, regardless of whether or not they are actually used
+in that compilation unit.  Sometimes this is useful, such as
+if, in the debugger, you want to cast a value to a type that is
+not actually used in your program (but is declared).  More often,
+however, this results in a significant amount of wasted space.
+With this option, GCC will avoid producing debug symbol output
+for types that are nowhere used in the source file being compiled.
+@end table
+
+@node Optimize Options
+@section Options That Control Optimization
+@cindex optimize options
+@cindex options, optimization
+
+These options control various sorts of optimizations.
+
+Without any optimization option, the compiler's goal is to reduce the
+cost of compilation and to make debugging produce the expected
+results.  Statements are independent: if you stop the program with a
+breakpoint between statements, you can then assign a new value to any
+variable or change the program counter to any other statement in the
+function and get exactly the results you would expect from the source
+code.
+
+Turning on optimization flags makes the compiler attempt to improve
+the performance and/or code size at the expense of compilation time
+and possibly the ability to debug the program.
+
+The compiler performs optimization based on the knowledge it has of the
+program.  Compiling multiple files at once to a single output file mode allows
+the compiler to use information gained from all of the files when compiling
+each of them.
+
+Not all optimizations are controlled directly by a flag.  Only
+optimizations that have a flag are listed.
+
+@table @gcctabopt
+@item -O
+@itemx -O1
+@opindex O
+@opindex O1
+Optimize.  Optimizing compilation takes somewhat more time, and a lot
+more memory for a large function.
+
+With @option{-O}, the compiler tries to reduce code size and execution
+time, without performing any optimizations that take a great deal of
+compilation time.
+
+@option{-O} turns on the following optimization flags:
+@gccoptlist{
+-fauto-inc-dec @gol
+-fcprop-registers @gol
+-fdce @gol
+-fdefer-pop @gol
+-fdelayed-branch @gol
+-fdse @gol
+-fguess-branch-probability @gol
+-fif-conversion2 @gol
+-fif-conversion @gol
+-finline-small-functions @gol
+-fipa-pure-const @gol
+-fipa-reference @gol
+-fmerge-constants
+-fsplit-wide-types @gol
+-ftree-builtin-call-dce @gol
+-ftree-ccp @gol
+-ftree-ch @gol
+-ftree-copyrename @gol
+-ftree-dce @gol
+-ftree-dominator-opts @gol
+-ftree-dse @gol
+-ftree-fre @gol
+-ftree-sra @gol
+-ftree-ter @gol
+-funit-at-a-time}
+
+@option{-O} also turns on @option{-fomit-frame-pointer} on machines
+where doing so does not interfere with debugging.
+
+@item -O2
+@opindex O2
+Optimize even more.  GCC performs nearly all supported optimizations
+that do not involve a space-speed tradeoff.
+As compared to @option{-O}, this option increases both compilation time
+and the performance of the generated code.
+
+@option{-O2} turns on all optimization flags specified by @option{-O}.  It
+also turns on the following optimization flags:
+@gccoptlist{-fthread-jumps @gol
+-falign-functions  -falign-jumps @gol
+-falign-loops  -falign-labels @gol
+-fcaller-saves @gol
+-fcrossjumping @gol
+-fcse-follow-jumps  -fcse-skip-blocks @gol
+-fdelete-null-pointer-checks @gol
+-fexpensive-optimizations @gol
+-fgcse  -fgcse-lm  @gol
+-findirect-inlining @gol
+-foptimize-sibling-calls @gol
+-fpeephole2 @gol
+-fregmove @gol
+-freorder-blocks  -freorder-functions @gol
+-frerun-cse-after-loop  @gol
+-fsched-interblock  -fsched-spec @gol
+-fschedule-insns  -fschedule-insns2 @gol
+-fstrict-aliasing -fstrict-overflow @gol
+-ftree-switch-conversion @gol
+-ftree-pre @gol
+-ftree-vrp}
+
+Please note the warning under @option{-fgcse} about
+invoking @option{-O2} on programs that use computed gotos.
+
+@item -O3
+@opindex O3
+Optimize yet more.  @option{-O3} turns on all optimizations specified
+by @option{-O2} and also turns on the @option{-finline-functions},
+@option{-funswitch-loops}, @option{-fpredictive-commoning},
+@option{-fgcse-after-reload} and @option{-ftree-vectorize} options.
+
+@item -O0
+@opindex O0
+Reduce compilation time and make debugging produce the expected
+results.  This is the default.
+
+@item -Os
+@opindex Os
+Optimize for size.  @option{-Os} enables all @option{-O2} optimizations that
+do not typically increase code size.  It also performs further
+optimizations designed to reduce code size.
+
+@option{-Os} disables the following optimization flags:
+@gccoptlist{-falign-functions  -falign-jumps  -falign-loops @gol
+-falign-labels  -freorder-blocks  -freorder-blocks-and-partition @gol
+-fprefetch-loop-arrays  -ftree-vect-loop-version}
+
+If you use multiple @option{-O} options, with or without level numbers,
+the last such option is the one that is effective.
+@end table
+
+Options of the form @option{-f@var{flag}} specify machine-independent
+flags.  Most flags have both positive and negative forms; the negative
+form of @option{-ffoo} would be @option{-fno-foo}.  In the table
+below, only one of the forms is listed---the one you typically will
+use.  You can figure out the other form by either removing @samp{no-}
+or adding it.
+
+The following options control specific optimizations.  They are either
+activated by @option{-O} options or are related to ones that are.  You
+can use the following flags in the rare cases when ``fine-tuning'' of
+optimizations to be performed is desired.
+
+@table @gcctabopt
+@item -fno-default-inline
+@opindex fno-default-inline
+Do not make member functions inline by default merely because they are
+defined inside the class scope (C++ only).  Otherwise, when you specify
+@w{@option{-O}}, member functions defined inside class scope are compiled
+inline by default; i.e., you don't need to add @samp{inline} in front of
+the member function name.
+
+@item -fno-defer-pop
+@opindex fno-defer-pop
+Always pop the arguments to each function call as soon as that function
+returns.  For machines which must pop arguments after a function call,
+the compiler normally lets arguments accumulate on the stack for several
+function calls and pops them all at once.
+
+Disabled at levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -fforward-propagate
+@opindex fforward-propagate
+Perform a forward propagation pass on RTL@.  The pass tries to combine two
+instructions and checks if the result can be simplified.  If loop unrolling
+is active, two passes are performed and the second is scheduled after
+loop unrolling.
+
+This option is enabled by default at optimization levels @option{-O2},
+@option{-O3}, @option{-Os}.
+
+@item -fomit-frame-pointer
+@opindex fomit-frame-pointer
+Don't keep the frame pointer in a register for functions that
+don't need one.  This avoids the instructions to save, set up and
+restore frame pointers; it also makes an extra register available
+in many functions.  @strong{It also makes debugging impossible on
+some machines.}
+
+On some machines, such as the VAX, this flag has no effect, because
+the standard calling sequence automatically handles the frame pointer
+and nothing is saved by pretending it doesn't exist.  The
+machine-description macro @code{FRAME_POINTER_REQUIRED} controls
+whether a target machine supports this flag.  @xref{Registers,,Register
+Usage, gccint, GNU Compiler Collection (GCC) Internals}.
+
+Enabled at levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -foptimize-sibling-calls
+@opindex foptimize-sibling-calls
+Optimize sibling and tail recursive calls.
+
+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -fno-inline
+@opindex fno-inline
+Don't pay attention to the @code{inline} keyword.  Normally this option
+is used to keep the compiler from expanding any functions inline.
+Note that if you are not optimizing, no functions can be expanded inline.
+
+@item -finline-small-functions
+@opindex finline-small-functions
+Integrate functions into their callers when their body is smaller than expected
+function call code (so overall size of program gets smaller).  The compiler
+heuristically decides which functions are simple enough to be worth integrating
+in this way.
+
+Enabled at level @option{-O2}.
+
+@item -findirect-inlining
+@opindex findirect-inlining
+Inline also indirect calls that are discovered to be known at compile
+time thanks to previous inlining.  This option has any effect only
+when inlining itself is turned on by the @option{-finline-functions}
+or @option{-finline-small-functions} options.
+
+Enabled at level @option{-O2}.
+
+@item -finline-functions
+@opindex finline-functions
+Integrate all simple functions into their callers.  The compiler
+heuristically decides which functions are simple enough to be worth
+integrating in this way.
+
+If all calls to a given function are integrated, and the function is
+declared @code{static}, then the function is normally not output as
+assembler code in its own right.
+
+Enabled at level @option{-O3}.
+
+@item -finline-functions-called-once
+@opindex finline-functions-called-once
+Consider all @code{static} functions called once for inlining into their
+caller even if they are not marked @code{inline}.  If a call to a given
+function is integrated, then the function is not output as assembler code
+in its own right.
+
+Enabled at levels @option{-O1}, @option{-O2}, @option{-O3} and @option{-Os}.
+
+@item -fearly-inlining
+@opindex fearly-inlining
+Inline functions marked by @code{always_inline} and functions whose body seems
+smaller than the function call overhead early before doing
+@option{-fprofile-generate} instrumentation and real inlining pass.  Doing so
+makes profiling significantly cheaper and usually inlining faster on programs
+having large chains of nested wrapper functions.
+
+Enabled by default.
+
+@item -finline-limit=@var{n}
+@opindex finline-limit
+By default, GCC limits the size of functions that can be inlined.  This flag
+allows coarse control of this limit.  @var{n} is the size of functions that
+can be inlined in number of pseudo instructions.
+
+Inlining is actually controlled by a number of parameters, which may be
+specified individually by using @option{--param @var{name}=@var{value}}.
+The @option{-finline-limit=@var{n}} option sets some of these parameters
+as follows:
+
+@table @gcctabopt
+@item max-inline-insns-single
+is set to @var{n}/2.
+@item max-inline-insns-auto
+is set to @var{n}/2.
+@end table
+
+See below for a documentation of the individual
+parameters controlling inlining and for the defaults of these parameters.
+
+@emph{Note:} there may be no value to @option{-finline-limit} that results
+in default behavior.
+
+@emph{Note:} pseudo instruction represents, in this particular context, an
+abstract measurement of function's size.  In no way does it represent a count
+of assembly instructions and as such its exact meaning might change from one
+release to an another.
+
+@item -fkeep-inline-functions
+@opindex fkeep-inline-functions
+In C, emit @code{static} functions that are declared @code{inline}
+into the object file, even if the function has been inlined into all
+of its callers.  This switch does not affect functions using the
+@code{extern inline} extension in GNU C89@.  In C++, emit any and all
+inline functions into the object file.
+
+@item -fkeep-static-consts
+@opindex fkeep-static-consts
+Emit variables declared @code{static const} when optimization isn't turned
+on, even if the variables aren't referenced.
+
+GCC enables this option by default.  If you want to force the compiler to
+check if the variable was referenced, regardless of whether or not
+optimization is turned on, use the @option{-fno-keep-static-consts} option.
+
+@item -fmerge-constants
+@opindex fmerge-constants
+Attempt to merge identical constants (string constants and floating point
+constants) across compilation units.
+
+This option is the default for optimized compilation if the assembler and
+linker support it.  Use @option{-fno-merge-constants} to inhibit this
+behavior.
+
+Enabled at levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -fmerge-all-constants
+@opindex fmerge-all-constants
+Attempt to merge identical constants and identical variables.
+
+This option implies @option{-fmerge-constants}.  In addition to
+@option{-fmerge-constants} this considers e.g.@: even constant initialized
+arrays or initialized constant variables with integral or floating point
+types.  Languages like C or C++ require each variable, including multiple
+instances of the same variable in recursive calls, to have distinct locations,
+so using this option will result in non-conforming
+behavior.
+
+@item -fmodulo-sched
+@opindex fmodulo-sched
+Perform swing modulo scheduling immediately before the first scheduling
+pass.  This pass looks at innermost loops and reorders their
+instructions by overlapping different iterations.
+
+@item -fmodulo-sched-allow-regmoves
+@opindex fmodulo-sched-allow-regmoves
+Perform more aggressive SMS based modulo scheduling with register moves
+allowed.  By setting this flag certain anti-dependences edges will be
+deleted which will trigger the generation of reg-moves based on the
+life-range analysis.  This option is effective only with
+@option{-fmodulo-sched} enabled.
+
+@item -fno-branch-count-reg
+@opindex fno-branch-count-reg
+Do not use ``decrement and branch'' instructions on a count register,
+but instead generate a sequence of instructions that decrement a
+register, compare it against zero, then branch based upon the result.
+This option is only meaningful on architectures that support such
+instructions, which include x86, PowerPC, IA-64 and S/390.
+
+The default is @option{-fbranch-count-reg}.
+
+@item -fno-function-cse
+@opindex fno-function-cse
+Do not put function addresses in registers; make each instruction that
+calls a constant function contain the function's address explicitly.
+
+This option results in less efficient code, but some strange hacks
+that alter the assembler output may be confused by the optimizations
+performed when this option is not used.
+
+The default is @option{-ffunction-cse}
+
+@item -fno-zero-initialized-in-bss
+@opindex fno-zero-initialized-in-bss
+If the target supports a BSS section, GCC by default puts variables that
+are initialized to zero into BSS@.  This can save space in the resulting
+code.
+
+This option turns off this behavior because some programs explicitly
+rely on variables going to the data section.  E.g., so that the
+resulting executable can find the beginning of that section and/or make
+assumptions based on that.
+
+The default is @option{-fzero-initialized-in-bss}.
+
+@item -fmudflap -fmudflapth -fmudflapir
+@opindex fmudflap
+@opindex fmudflapth
+@opindex fmudflapir
+@cindex bounds checking
+@cindex mudflap
+For front-ends that support it (C and C++), instrument all risky
+pointer/array dereferencing operations, some standard library
+string/heap functions, and some other associated constructs with
+range/validity tests.  Modules so instrumented should be immune to
+buffer overflows, invalid heap use, and some other classes of C/C++
+programming errors.  The instrumentation relies on a separate runtime
+library (@file{libmudflap}), which will be linked into a program if
+@option{-fmudflap} is given at link time.  Run-time behavior of the
+instrumented program is controlled by the @env{MUDFLAP_OPTIONS}
+environment variable.  See @code{env MUDFLAP_OPTIONS=-help a.out}
+for its options.
+
+Use @option{-fmudflapth} instead of @option{-fmudflap} to compile and to
+link if your program is multi-threaded.  Use @option{-fmudflapir}, in
+addition to @option{-fmudflap} or @option{-fmudflapth}, if
+instrumentation should ignore pointer reads.  This produces less
+instrumentation (and therefore faster execution) and still provides
+some protection against outright memory corrupting writes, but allows
+erroneously read data to propagate within a program.
+
+@item -fthread-jumps
+@opindex fthread-jumps
+Perform optimizations where we check to see if a jump branches to a
+location where another comparison subsumed by the first is found.  If
+so, the first branch is redirected to either the destination of the
+second branch or a point immediately following it, depending on whether
+the condition is known to be true or false.
+
+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -fsplit-wide-types
+@opindex fsplit-wide-types
+When using a type that occupies multiple registers, such as @code{long
+long} on a 32-bit system, split the registers apart and allocate them
+independently.  This normally generates better code for those types,
+but may make debugging more difficult.
+
+Enabled at levels @option{-O}, @option{-O2}, @option{-O3},
+@option{-Os}.
+
+@item -fcse-follow-jumps
+@opindex fcse-follow-jumps
+In common subexpression elimination (CSE), scan through jump instructions
+when the target of the jump is not reached by any other path.  For
+example, when CSE encounters an @code{if} statement with an
+@code{else} clause, CSE will follow the jump when the condition
+tested is false.
+
+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -fcse-skip-blocks
+@opindex fcse-skip-blocks
+This is similar to @option{-fcse-follow-jumps}, but causes CSE to
+follow jumps which conditionally skip over blocks.  When CSE
+encounters a simple @code{if} statement with no else clause,
+@option{-fcse-skip-blocks} causes CSE to follow the jump around the
+body of the @code{if}.
+
+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -frerun-cse-after-loop
+@opindex frerun-cse-after-loop
+Re-run common subexpression elimination after loop optimizations has been
+performed.
+
+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -fgcse
+@opindex fgcse
+Perform a global common subexpression elimination pass.
+This pass also performs global constant and copy propagation.
+
+@emph{Note:} When compiling a program using computed gotos, a GCC
+extension, you may get better runtime performance if you disable
+the global common subexpression elimination pass by adding
+@option{-fno-gcse} to the command line.
+
+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -fgcse-lm
+@opindex fgcse-lm
+When @option{-fgcse-lm} is enabled, global common subexpression elimination will
+attempt to move loads which are only killed by stores into themselves.  This
+allows a loop containing a load/store sequence to be changed to a load outside
+the loop, and a copy/store within the loop.
+
+Enabled by default when gcse is enabled.
+
+@item -fgcse-sm
+@opindex fgcse-sm
+When @option{-fgcse-sm} is enabled, a store motion pass is run after
+global common subexpression elimination.  This pass will attempt to move
+stores out of loops.  When used in conjunction with @option{-fgcse-lm},
+loops containing a load/store sequence can be changed to a load before
+the loop and a store after the loop.
+
+Not enabled at any optimization level.
+
+@item -fgcse-las
+@opindex fgcse-las
+When @option{-fgcse-las} is enabled, the global common subexpression
+elimination pass eliminates redundant loads that come after stores to the
+same memory location (both partial and full redundancies).
+
+Not enabled at any optimization level.
+
+@item -fgcse-after-reload
+@opindex fgcse-after-reload
+When @option{-fgcse-after-reload} is enabled, a redundant load elimination
+pass is performed after reload.  The purpose of this pass is to cleanup
+redundant spilling.
+
+@item -funsafe-loop-optimizations
+@opindex funsafe-loop-optimizations
+If given, the loop optimizer will assume that loop indices do not
+overflow, and that the loops with nontrivial exit condition are not
+infinite.  This enables a wider range of loop optimizations even if
+the loop optimizer itself cannot prove that these assumptions are valid.
+Using @option{-Wunsafe-loop-optimizations}, the compiler will warn you
+if it finds this kind of loop.
+
+@item -fcrossjumping
+@opindex fcrossjumping
+Perform cross-jumping transformation.  This transformation unifies equivalent code and save code size.  The
+resulting code may or may not perform better than without cross-jumping.
+
+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -fauto-inc-dec
+@opindex fauto-inc-dec
+Combine increments or decrements of addresses with memory accesses.
+This pass is always skipped on architectures that do not have
+instructions to support this.  Enabled by default at @option{-O} and
+higher on architectures that support this.
+
+@item -fdce
+@opindex fdce
+Perform dead code elimination (DCE) on RTL@.
+Enabled by default at @option{-O} and higher.
+
+@item -fdse
+@opindex fdse
+Perform dead store elimination (DSE) on RTL@.
+Enabled by default at @option{-O} and higher.
+
+@item -fif-conversion
+@opindex fif-conversion
+Attempt to transform conditional jumps into branch-less equivalents.  This
+include use of conditional moves, min, max, set flags and abs instructions, and
+some tricks doable by standard arithmetics.  The use of conditional execution
+on chips where it is available is controlled by @code{if-conversion2}.
+
+Enabled at levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -fif-conversion2
+@opindex fif-conversion2
+Use conditional execution (where available) to transform conditional jumps into
+branch-less equivalents.
+
+Enabled at levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -fdelete-null-pointer-checks
+@opindex fdelete-null-pointer-checks
+Use global dataflow analysis to identify and eliminate useless checks
+for null pointers.  The compiler assumes that dereferencing a null
+pointer would have halted the program.  If a pointer is checked after
+it has already been dereferenced, it cannot be null.
+
+In some environments, this assumption is not true, and programs can
+safely dereference null pointers.  Use
+@option{-fno-delete-null-pointer-checks} to disable this optimization
+for programs which depend on that behavior.
+
+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -fexpensive-optimizations
+@opindex fexpensive-optimizations
+Perform a number of minor optimizations that are relatively expensive.
+
+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -foptimize-register-move
+@itemx -fregmove
+@opindex foptimize-register-move
+@opindex fregmove
+Attempt to reassign register numbers in move instructions and as
+operands of other simple instructions in order to maximize the amount of
+register tying.  This is especially helpful on machines with two-operand
+instructions.
+
+Note @option{-fregmove} and @option{-foptimize-register-move} are the same
+optimization.
+
+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -fira-algorithm=@var{algorithm}
+Use specified coloring algorithm for the integrated register
+allocator.  The @var{algorithm} argument should be @code{priority} or
+@code{CB}.  The first algorithm specifies Chow's priority coloring,
+the second one specifies Chaitin-Briggs coloring.  The second
+algorithm can be unimplemented for some architectures.  If it is
+implemented, it is the default because Chaitin-Briggs coloring as a
+rule generates a better code.
+
+@item -fira-region=@var{region}
+Use specified regions for the integrated register allocator.  The
+@var{region} argument should be one of @code{all}, @code{mixed}, or
+@code{one}.  The first value means using all loops as register
+allocation regions, the second value which is the default means using
+all loops except for loops with small register pressure as the
+regions, and third one means using all function as a single region.
+The first value can give best result for machines with small size and
+irregular register set, the third one results in faster and generates
+decent code and the smallest size code, and the default value usually
+give the best results in most cases and for most architectures.
+
+@item -fira-coalesce
+@opindex fira-coalesce
+Do optimistic register coalescing.  This option might be profitable for
+architectures with big regular register files.
+
+@item -fno-ira-share-save-slots
+@opindex fno-ira-share-save-slots
+Switch off sharing stack slots used for saving call used hard
+registers living through a call.  Each hard register will get a
+separate stack slot and as a result function stack frame will be
+bigger.
+
+@item -fno-ira-share-spill-slots
+@opindex fno-ira-share-spill-slots
+Switch off sharing stack slots allocated for pseudo-registers.  Each
+pseudo-register which did not get a hard register will get a separate
+stack slot and as a result function stack frame will be bigger.
+
+@item -fira-verbose=@var{n}
+@opindex fira-verbose
+Set up how verbose dump file for the integrated register allocator
+will be.  Default value is 5.  If the value is greater or equal to 10,
+the dump file will be stderr as if the value were @var{n} minus 10.
+
+@item -fdelayed-branch
+@opindex fdelayed-branch
+If supported for the target machine, attempt to reorder instructions
+to exploit instruction slots available after delayed branch
+instructions.
+
+Enabled at levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -fschedule-insns
+@opindex fschedule-insns
+If supported for the target machine, attempt to reorder instructions to
+eliminate execution stalls due to required data being unavailable.  This
+helps machines that have slow floating point or memory load instructions
+by allowing other instructions to be issued until the result of the load
+or floating point instruction is required.
+
+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -fschedule-insns2
+@opindex fschedule-insns2
+Similar to @option{-fschedule-insns}, but requests an additional pass of
+instruction scheduling after register allocation has been done.  This is
+especially useful on machines with a relatively small number of
+registers and where memory load instructions take more than one cycle.
+
+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -fno-sched-interblock
+@opindex fno-sched-interblock
+Don't schedule instructions across basic blocks.  This is normally
+enabled by default when scheduling before register allocation, i.e.@:
+with @option{-fschedule-insns} or at @option{-O2} or higher.
+
+@item -fno-sched-spec
+@opindex fno-sched-spec
+Don't allow speculative motion of non-load instructions.  This is normally
+enabled by default when scheduling before register allocation, i.e.@:
+with @option{-fschedule-insns} or at @option{-O2} or higher.
+
+@item -fsched-spec-load
+@opindex fsched-spec-load
+Allow speculative motion of some load instructions.  This only makes
+sense when scheduling before register allocation, i.e.@: with
+@option{-fschedule-insns} or at @option{-O2} or higher.
+
+@item -fsched-spec-load-dangerous
+@opindex fsched-spec-load-dangerous
+Allow speculative motion of more load instructions.  This only makes
+sense when scheduling before register allocation, i.e.@: with
+@option{-fschedule-insns} or at @option{-O2} or higher.
+
+@item -fsched-stalled-insns
+@itemx -fsched-stalled-insns=@var{n}
+@opindex fsched-stalled-insns
+Define how many insns (if any) can be moved prematurely from the queue
+of stalled insns into the ready list, during the second scheduling pass.
+@option{-fno-sched-stalled-insns} means that no insns will be moved
+prematurely, @option{-fsched-stalled-insns=0} means there is no limit
+on how many queued insns can be moved prematurely.
+@option{-fsched-stalled-insns} without a value is equivalent to
+@option{-fsched-stalled-insns=1}.
+
+@item -fsched-stalled-insns-dep
+@itemx -fsched-stalled-insns-dep=@var{n}
+@opindex fsched-stalled-insns-dep
+Define how many insn groups (cycles) will be examined for a dependency
+on a stalled insn that is candidate for premature removal from the queue
+of stalled insns.  This has an effect only during the second scheduling pass,
+and only if @option{-fsched-stalled-insns} is used.
+@option{-fno-sched-stalled-insns-dep} is equivalent to
+@option{-fsched-stalled-insns-dep=0}.
+@option{-fsched-stalled-insns-dep} without a value is equivalent to
+@option{-fsched-stalled-insns-dep=1}.
+
+@item -fsched2-use-superblocks
+@opindex fsched2-use-superblocks
+When scheduling after register allocation, do use superblock scheduling
+algorithm.  Superblock scheduling allows motion across basic block boundaries
+resulting on faster schedules.  This option is experimental, as not all machine
+descriptions used by GCC model the CPU closely enough to avoid unreliable
+results from the algorithm.
+
+This only makes sense when scheduling after register allocation, i.e.@: with
+@option{-fschedule-insns2} or at @option{-O2} or higher.
+
+@item -fsched2-use-traces
+@opindex fsched2-use-traces
+Use @option{-fsched2-use-superblocks} algorithm when scheduling after register
+allocation and additionally perform code duplication in order to increase the
+size of superblocks using tracer pass.  See @option{-ftracer} for details on
+trace formation.
+
+This mode should produce faster but significantly longer programs.  Also
+without @option{-fbranch-probabilities} the traces constructed may not
+match the reality and hurt the performance.  This only makes
+sense when scheduling after register allocation, i.e.@: with
+@option{-fschedule-insns2} or at @option{-O2} or higher.
+
+@item -fsee
+@opindex fsee
+Eliminate redundant sign extension instructions and move the non-redundant
+ones to optimal placement using lazy code motion (LCM).
+
+@item -freschedule-modulo-scheduled-loops
+@opindex freschedule-modulo-scheduled-loops
+The modulo scheduling comes before the traditional scheduling, if a loop
+was modulo scheduled we may want to prevent the later scheduling passes
+from changing its schedule, we use this option to control that.
+
+@item -fselective-scheduling
+@opindex fselective-scheduling
+Schedule instructions using selective scheduling algorithm.  Selective
+scheduling runs instead of the first scheduler pass.
+
+@item -fselective-scheduling2
+@opindex fselective-scheduling2
+Schedule instructions using selective scheduling algorithm.  Selective
+scheduling runs instead of the second scheduler pass.
+
+@item -fsel-sched-pipelining
+@opindex fsel-sched-pipelining
+Enable software pipelining of innermost loops during selective scheduling.  
+This option has no effect until one of @option{-fselective-scheduling} or 
+@option{-fselective-scheduling2} is turned on.
+
+@item -fsel-sched-pipelining-outer-loops
+@opindex fsel-sched-pipelining-outer-loops
+When pipelining loops during selective scheduling, also pipeline outer loops.
+This option has no effect until @option{-fsel-sched-pipelining} is turned on.
+
+@item -fcaller-saves
+@opindex fcaller-saves
+Enable values to be allocated in registers that will be clobbered by
+function calls, by emitting extra instructions to save and restore the
+registers around such calls.  Such allocation is done only when it
+seems to result in better code than would otherwise be produced.
+
+This option is always enabled by default on certain machines, usually
+those which have no call-preserved registers to use instead.
+
+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -fconserve-stack
+@opindex fconserve-stack
+Attempt to minimize stack usage.  The compiler will attempt to use less
+stack space, even if that makes the program slower.  This option
+implies setting the @option{large-stack-frame} parameter to 100
+and the @option{large-stack-frame-growth} parameter to 400.
+
+@item -ftree-reassoc
+@opindex ftree-reassoc
+Perform reassociation on trees.  This flag is enabled by default
+at @option{-O} and higher.
+
+@item -ftree-pre
+@opindex ftree-pre
+Perform partial redundancy elimination (PRE) on trees.  This flag is
+enabled by default at @option{-O2} and @option{-O3}.
+
+@item -ftree-fre
+@opindex ftree-fre
+Perform full redundancy elimination (FRE) on trees.  The difference
+between FRE and PRE is that FRE only considers expressions
+that are computed on all paths leading to the redundant computation.
+This analysis is faster than PRE, though it exposes fewer redundancies.
+This flag is enabled by default at @option{-O} and higher.
+
+@item -ftree-copy-prop
+@opindex ftree-copy-prop
+Perform copy propagation on trees.  This pass eliminates unnecessary
+copy operations.  This flag is enabled by default at @option{-O} and
+higher.
+
+@item -fipa-pure-const
+@opindex fipa-pure-const
+Discover which functions are pure or constant.
+Enabled by default at @option{-O} and higher.
+
+@item -fipa-reference
+@opindex fipa-reference
+Discover which static variables do not escape cannot escape the
+compilation unit.
+Enabled by default at @option{-O} and higher.
+
+@item -fipa-struct-reorg
+@opindex fipa-struct-reorg
+Perform structure reorganization optimization, that change C-like structures 
+layout in order to better utilize spatial locality.  This transformation is 
+affective for programs containing arrays of structures.  Available in two 
+compilation modes: profile-based (enabled with @option{-fprofile-generate})
+or static (which uses built-in heuristics).  Require @option{-fipa-type-escape}
+to provide the safety of this transformation.  It works only in whole program
+mode, so it requires @option{-fwhole-program} and @option{-combine} to be
+enabled.  Structures considered @samp{cold} by this transformation are not
+affected (see @option{--param struct-reorg-cold-struct-ratio=@var{value}}).
+
+With this flag, the program debug info reflects a new structure layout.
+
+@item -fipa-pta
+@opindex fipa-pta
+Perform interprocedural pointer analysis.  This option is experimental
+and does not affect generated code.
+
+@item -fipa-cp
+@opindex fipa-cp
+Perform interprocedural constant propagation.
+This optimization analyzes the program to determine when values passed
+to functions are constants and then optimizes accordingly.  
+This optimization can substantially increase performance
+if the application has constants passed to functions.
+This flag is enabled by default at @option{-O2}, @option{-Os} and @option{-O3}.
+
+@item -fipa-cp-clone
+@opindex fipa-cp-clone
+Perform function cloning to make interprocedural constant propagation stronger.
+When enabled, interprocedural constant propagation will perform function cloning
+when externally visible function can be called with constant arguments.
+Because this optimization can create multiple copies of functions,
+it may significantly increase code size
+(see @option{--param ipcp-unit-growth=@var{value}}).
+This flag is enabled by default at @option{-O3}.
+
+@item -fipa-matrix-reorg
+@opindex fipa-matrix-reorg
+Perform matrix flattening and transposing.
+Matrix flattening tries to replace a m-dimensional matrix 
+with its equivalent n-dimensional matrix, where n < m.
+This reduces the level of indirection needed for accessing the elements
+of the matrix. The second optimization is matrix transposing that
+attempts to change the order of the matrix's dimensions in order to
+improve cache locality.
+Both optimizations need the @option{-fwhole-program} flag. 
+Transposing is enabled only if profiling information is available.
+
+
+@item -ftree-sink
+@opindex ftree-sink
+Perform forward store motion  on trees.  This flag is
+enabled by default at @option{-O} and higher.
+
+@item -ftree-ccp
+@opindex ftree-ccp
+Perform sparse conditional constant propagation (CCP) on trees.  This
+pass only operates on local scalar variables and is enabled by default
+at @option{-O} and higher.
+
+@item -ftree-switch-conversion
+Perform conversion of simple initializations in a switch to
+initializations from a scalar array.  This flag is enabled by default
+at @option{-O2} and higher.
+
+@item -ftree-dce
+@opindex ftree-dce
+Perform dead code elimination (DCE) on trees.  This flag is enabled by
+default at @option{-O} and higher.
+
+@item -ftree-builtin-call-dce
+@opindex ftree-builtin-call-dce
+Perform conditional dead code elimination (DCE) for calls to builtin functions 
+that may set @code{errno} but are otherwise side-effect free.  This flag is 
+enabled by default at @option{-O2} and higher if @option{-Os} is not also 
+specified.
+
+@item -ftree-dominator-opts
+@opindex ftree-dominator-opts
+Perform a variety of simple scalar cleanups (constant/copy
+propagation, redundancy elimination, range propagation and expression
+simplification) based on a dominator tree traversal.  This also
+performs jump threading (to reduce jumps to jumps). This flag is
+enabled by default at @option{-O} and higher.
+
+@item -ftree-dse
+@opindex ftree-dse
+Perform dead store elimination (DSE) on trees.  A dead store is a store into
+a memory location which will later be overwritten by another store without
+any intervening loads.  In this case the earlier store can be deleted.  This
+flag is enabled by default at @option{-O} and higher.
+
+@item -ftree-ch
+@opindex ftree-ch
+Perform loop header copying on trees.  This is beneficial since it increases
+effectiveness of code motion optimizations.  It also saves one jump.  This flag
+is enabled by default at @option{-O} and higher.  It is not enabled
+for @option{-Os}, since it usually increases code size.
+
+@item -ftree-loop-optimize
+@opindex ftree-loop-optimize
+Perform loop optimizations on trees.  This flag is enabled by default
+at @option{-O} and higher.
+
+@item -ftree-loop-linear
+@opindex ftree-loop-linear
+Perform linear loop transformations on tree.  This flag can improve cache
+performance and allow further loop optimizations to take place.
+
+@item -floop-interchange
+Perform loop interchange transformations on loops.  Interchanging two
+nested loops switches the inner and outer loops.  For example, given a
+loop like:
+@smallexample
+DO J = 1, M
+  DO I = 1, N
+    A(J, I) = A(J, I) * C
+  ENDDO
+ENDDO
+@end smallexample
+loop interchange will transform the loop as if the user had written:
+@smallexample
+DO I = 1, N
+  DO J = 1, M
+    A(J, I) = A(J, I) * C
+  ENDDO
+ENDDO
+@end smallexample
+which can be beneficial when @code{N} is larger than the caches,
+because in Fortran, the elements of an array are stored in memory
+contiguously by column, and the original loop iterates over rows,
+potentially creating at each access a cache miss.  This optimization
+applies to all the languages supported by GCC and is not limited to
+Fortran.  To use this code transformation, GCC has to be configured
+with @option{--with-ppl} and @option{--with-cloog} to enable the
+Graphite loop transformation infrastructure.
+
+@item -floop-strip-mine
+Perform loop strip mining transformations on loops.  Strip mining
+splits a loop into two nested loops.  The outer loop has strides 
+equal to the strip size and the inner loop has strides of the 
+original loop within a strip.  For example, given a loop like:
+@smallexample
+DO I = 1, N
+  A(I) = A(I) + C
+ENDDO
+@end smallexample
+loop strip mining will transform the loop as if the user had written:
+@smallexample
+DO II = 1, N, 4
+  DO I = II, min (II + 3, N)
+    A(I) = A(I) + C
+  ENDDO
+ENDDO
+@end smallexample
+This optimization applies to all the languages supported by GCC and is
+not limited to Fortran.  To use this code transformation, GCC has to
+be configured with @option{--with-ppl} and @option{--with-cloog} to
+enable the Graphite loop transformation infrastructure.
+
+@item -floop-block
+Perform loop blocking transformations on loops.  Blocking strip mines
+each loop in the loop nest such that the memory accesses of the
+element loops fit inside caches.  For example, given a loop like:
+@smallexample
+DO I = 1, N
+  DO J = 1, M
+    A(J, I) = B(I) + C(J)
+  ENDDO
+ENDDO
+@end smallexample
+loop blocking will transform the loop as if the user had written:
+@smallexample
+DO II = 1, N, 64
+  DO JJ = 1, M, 64
+    DO I = II, min (II + 63, N)
+      DO J = JJ, min (JJ + 63, M)
+        A(J, I) = B(I) + C(J)
+      ENDDO
+    ENDDO
+  ENDDO
+ENDDO
+@end smallexample
+which can be beneficial when @code{M} is larger than the caches,
+because the innermost loop will iterate over a smaller amount of data
+that can be kept in the caches.  This optimization applies to all the
+languages supported by GCC and is not limited to Fortran.  To use this
+code transformation, GCC has to be configured with @option{--with-ppl}
+and @option{--with-cloog} to enable the Graphite loop transformation
+infrastructure.
+
+@item -fcheck-data-deps
+@opindex fcheck-data-deps
+Compare the results of several data dependence analyzers.  This option
+is used for debugging the data dependence analyzers.
+
+@item -ftree-loop-distribution
+Perform loop distribution.  This flag can improve cache performance on
+big loop bodies and allow further loop optimizations, like
+parallelization or vectorization, to take place.  For example, the loop
+@smallexample
+DO I = 1, N
+  A(I) = B(I) + C
+  D(I) = E(I) * F
+ENDDO
+@end smallexample
+is transformed to
+@smallexample
+DO I = 1, N
+   A(I) = B(I) + C
+ENDDO
+DO I = 1, N
+   D(I) = E(I) * F
+ENDDO
+@end smallexample
+
+@item -ftree-loop-im
+@opindex ftree-loop-im
+Perform loop invariant motion on trees.  This pass moves only invariants that
+would be hard to handle at RTL level (function calls, operations that expand to
+nontrivial sequences of insns).  With @option{-funswitch-loops} it also moves
+operands of conditions that are invariant out of the loop, so that we can use
+just trivial invariantness analysis in loop unswitching.  The pass also includes
+store motion.
+
+@item -ftree-loop-ivcanon
+@opindex ftree-loop-ivcanon
+Create a canonical counter for number of iterations in the loop for that
+determining number of iterations requires complicated analysis.  Later
+optimizations then may determine the number easily.  Useful especially
+in connection with unrolling.
+
+@item -fivopts
+@opindex fivopts
+Perform induction variable optimizations (strength reduction, induction
+variable merging and induction variable elimination) on trees.
+
+@item -ftree-parallelize-loops=n
+@opindex ftree-parallelize-loops
+Parallelize loops, i.e., split their iteration space to run in n threads.
+This is only possible for loops whose iterations are independent
+and can be arbitrarily reordered.  The optimization is only
+profitable on multiprocessor machines, for loops that are CPU-intensive,
+rather than constrained e.g.@: by memory bandwidth.  This option
+implies @option{-pthread}, and thus is only supported on targets
+that have support for @option{-pthread}.
+
+@item -ftree-sra
+@opindex ftree-sra
+Perform scalar replacement of aggregates.  This pass replaces structure
+references with scalars to prevent committing structures to memory too
+early.  This flag is enabled by default at @option{-O} and higher.
+
+@item -ftree-copyrename
+@opindex ftree-copyrename
+Perform copy renaming on trees.  This pass attempts to rename compiler
+temporaries to other variables at copy locations, usually resulting in
+variable names which more closely resemble the original variables.  This flag
+is enabled by default at @option{-O} and higher.
+
+@item -ftree-ter
+@opindex ftree-ter
+Perform temporary expression replacement during the SSA->normal phase.  Single
+use/single def temporaries are replaced at their use location with their
+defining expression.  This results in non-GIMPLE code, but gives the expanders
+much more complex trees to work on resulting in better RTL generation.  This is
+enabled by default at @option{-O} and higher.
+
+@item -ftree-vectorize
+@opindex ftree-vectorize
+Perform loop vectorization on trees. This flag is enabled by default at
+@option{-O3}.
+
+@item -ftree-vect-loop-version
+@opindex ftree-vect-loop-version
+Perform loop versioning when doing loop vectorization on trees.  When a loop
+appears to be vectorizable except that data alignment or data dependence cannot
+be determined at compile time then vectorized and non-vectorized versions of
+the loop are generated along with runtime checks for alignment or dependence
+to control which version is executed.  This option is enabled by default
+except at level @option{-Os} where it is disabled.
+
+@item -fvect-cost-model
+@opindex fvect-cost-model
+Enable cost model for vectorization.
+
+@item -ftree-vrp
+@opindex ftree-vrp
+Perform Value Range Propagation on trees.  This is similar to the
+constant propagation pass, but instead of values, ranges of values are
+propagated.  This allows the optimizers to remove unnecessary range
+checks like array bound checks and null pointer checks.  This is
+enabled by default at @option{-O2} and higher.  Null pointer check
+elimination is only done if @option{-fdelete-null-pointer-checks} is
+enabled.
+
+@item -ftracer
+@opindex ftracer
+Perform tail duplication to enlarge superblock size.  This transformation
+simplifies the control flow of the function allowing other optimizations to do
+better job.
+
+@item -funroll-loops
+@opindex funroll-loops
+Unroll loops whose number of iterations can be determined at compile
+time or upon entry to the loop.  @option{-funroll-loops} implies
+@option{-frerun-cse-after-loop}.  This option makes code larger,
+and may or may not make it run faster.
+
+@item -funroll-all-loops
+@opindex funroll-all-loops
+Unroll all loops, even if their number of iterations is uncertain when
+the loop is entered.  This usually makes programs run more slowly.
+@option{-funroll-all-loops} implies the same options as
+@option{-funroll-loops},
+
+@item -fsplit-ivs-in-unroller
+@opindex fsplit-ivs-in-unroller
+Enables expressing of values of induction variables in later iterations
+of the unrolled loop using the value in the first iteration.  This breaks
+long dependency chains, thus improving efficiency of the scheduling passes.
+
+Combination of @option{-fweb} and CSE is often sufficient to obtain the
+same effect.  However in cases the loop body is more complicated than
+a single basic block, this is not reliable.  It also does not work at all
+on some of the architectures due to restrictions in the CSE pass.
+
+This optimization is enabled by default.
+
+@item -fvariable-expansion-in-unroller
+@opindex fvariable-expansion-in-unroller
+With this option, the compiler will create multiple copies of some
+local variables when unrolling a loop which can result in superior code.
+
+@item -fpredictive-commoning
+@opindex fpredictive-commoning
+Perform predictive commoning optimization, i.e., reusing computations
+(especially memory loads and stores) performed in previous
+iterations of loops.
+
+This option is enabled at level @option{-O3}.
+
+@item -fprefetch-loop-arrays
+@opindex fprefetch-loop-arrays
+If supported by the target machine, generate instructions to prefetch
+memory to improve the performance of loops that access large arrays.
+
+This option may generate better or worse code; results are highly
+dependent on the structure of loops within the source code.
+
+Disabled at level @option{-Os}.
+
+@item -fno-peephole
+@itemx -fno-peephole2
+@opindex fno-peephole
+@opindex fno-peephole2
+Disable any machine-specific peephole optimizations.  The difference
+between @option{-fno-peephole} and @option{-fno-peephole2} is in how they
+are implemented in the compiler; some targets use one, some use the
+other, a few use both.
+
+@option{-fpeephole} is enabled by default.
+@option{-fpeephole2} enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -fno-guess-branch-probability
+@opindex fno-guess-branch-probability
+Do not guess branch probabilities using heuristics.
+
+GCC will use heuristics to guess branch probabilities if they are
+not provided by profiling feedback (@option{-fprofile-arcs}).  These
+heuristics are based on the control flow graph.  If some branch probabilities
+are specified by @samp{__builtin_expect}, then the heuristics will be
+used to guess branch probabilities for the rest of the control flow graph,
+taking the @samp{__builtin_expect} info into account.  The interactions
+between the heuristics and @samp{__builtin_expect} can be complex, and in
+some cases, it may be useful to disable the heuristics so that the effects
+of @samp{__builtin_expect} are easier to understand.
+
+The default is @option{-fguess-branch-probability} at levels
+@option{-O}, @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -freorder-blocks
+@opindex freorder-blocks
+Reorder basic blocks in the compiled function in order to reduce number of
+taken branches and improve code locality.
+
+Enabled at levels @option{-O2}, @option{-O3}.
+
+@item -freorder-blocks-and-partition
+@opindex freorder-blocks-and-partition
+In addition to reordering basic blocks in the compiled function, in order
+to reduce number of taken branches, partitions hot and cold basic blocks
+into separate sections of the assembly and .o files, to improve
+paging and cache locality performance.
+
+This optimization is automatically turned off in the presence of
+exception handling, for linkonce sections, for functions with a user-defined
+section attribute and on any architecture that does not support named
+sections.
+
+@item -freorder-functions
+@opindex freorder-functions
+Reorder functions in the object file in order to
+improve code locality.  This is implemented by using special
+subsections @code{.text.hot} for most frequently executed functions and
+@code{.text.unlikely} for unlikely executed functions.  Reordering is done by
+the linker so object file format must support named sections and linker must
+place them in a reasonable way.
+
+Also profile feedback must be available in to make this option effective.  See
+@option{-fprofile-arcs} for details.
+
+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -fstrict-aliasing
+@opindex fstrict-aliasing
+Allow the compiler to assume the strictest aliasing rules applicable to
+the language being compiled.  For C (and C++), this activates
+optimizations based on the type of expressions.  In particular, an
+object of one type is assumed never to reside at the same address as an
+object of a different type, unless the types are almost the same.  For
+example, an @code{unsigned int} can alias an @code{int}, but not a
+@code{void*} or a @code{double}.  A character type may alias any other
+type.
+
+@anchor{Type-punning}Pay special attention to code like this:
+@smallexample
+union a_union @{
+  int i;
+  double d;
+@};
+
+int f() @{
+  union a_union t;
+  t.d = 3.0;
+  return t.i;
+@}
+@end smallexample
+The practice of reading from a different union member than the one most
+recently written to (called ``type-punning'') is common.  Even with
+@option{-fstrict-aliasing}, type-punning is allowed, provided the memory
+is accessed through the union type.  So, the code above will work as
+expected.  @xref{Structures unions enumerations and bit-fields
+implementation}.  However, this code might not:
+@smallexample
+int f() @{
+  union a_union t;
+  int* ip;
+  t.d = 3.0;
+  ip = &t.i;
+  return *ip;
+@}
+@end smallexample
+
+Similarly, access by taking the address, casting the resulting pointer
+and dereferencing the result has undefined behavior, even if the cast
+uses a union type, e.g.:
+@smallexample
+int f() @{
+  double d = 3.0;
+  return ((union a_union *) &d)->i;
+@}
+@end smallexample
+
+The @option{-fstrict-aliasing} option is enabled at levels
+@option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -fstrict-overflow
+@opindex fstrict-overflow
+Allow the compiler to assume strict signed overflow rules, depending
+on the language being compiled.  For C (and C++) this means that
+overflow when doing arithmetic with signed numbers is undefined, which
+means that the compiler may assume that it will not happen.  This
+permits various optimizations.  For example, the compiler will assume
+that an expression like @code{i + 10 > i} will always be true for
+signed @code{i}.  This assumption is only valid if signed overflow is
+undefined, as the expression is false if @code{i + 10} overflows when
+using twos complement arithmetic.  When this option is in effect any
+attempt to determine whether an operation on signed numbers will
+overflow must be written carefully to not actually involve overflow.
+
+This option also allows the compiler to assume strict pointer
+semantics: given a pointer to an object, if adding an offset to that
+pointer does not produce a pointer to the same object, the addition is
+undefined.  This permits the compiler to conclude that @code{p + u >
+p} is always true for a pointer @code{p} and unsigned integer
+@code{u}.  This assumption is only valid because pointer wraparound is
+undefined, as the expression is false if @code{p + u} overflows using
+twos complement arithmetic.
+
+See also the @option{-fwrapv} option.  Using @option{-fwrapv} means
+that integer signed overflow is fully defined: it wraps.  When
+@option{-fwrapv} is used, there is no difference between
+@option{-fstrict-overflow} and @option{-fno-strict-overflow} for
+integers.  With @option{-fwrapv} certain types of overflow are
+permitted.  For example, if the compiler gets an overflow when doing
+arithmetic on constants, the overflowed value can still be used with
+@option{-fwrapv}, but not otherwise.
+
+The @option{-fstrict-overflow} option is enabled at levels
+@option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -falign-functions
+@itemx -falign-functions=@var{n}
+@opindex falign-functions
+Align the start of functions to the next power-of-two greater than
+@var{n}, skipping up to @var{n} bytes.  For instance,
+@option{-falign-functions=32} aligns functions to the next 32-byte
+boundary, but @option{-falign-functions=24} would align to the next
+32-byte boundary only if this can be done by skipping 23 bytes or less.
+
+@option{-fno-align-functions} and @option{-falign-functions=1} are
+equivalent and mean that functions will not be aligned.
+
+Some assemblers only support this flag when @var{n} is a power of two;
+in that case, it is rounded up.
+
+If @var{n} is not specified or is zero, use a machine-dependent default.
+
+Enabled at levels @option{-O2}, @option{-O3}.
+
+@item -falign-labels
+@itemx -falign-labels=@var{n}
+@opindex falign-labels
+Align all branch targets to a power-of-two boundary, skipping up to
+@var{n} bytes like @option{-falign-functions}.  This option can easily
+make code slower, because it must insert dummy operations for when the
+branch target is reached in the usual flow of the code.
+
+@option{-fno-align-labels} and @option{-falign-labels=1} are
+equivalent and mean that labels will not be aligned.
+
+If @option{-falign-loops} or @option{-falign-jumps} are applicable and
+are greater than this value, then their values are used instead.
+
+If @var{n} is not specified or is zero, use a machine-dependent default
+which is very likely to be @samp{1}, meaning no alignment.
+
+Enabled at levels @option{-O2}, @option{-O3}.
+
+@item -falign-loops
+@itemx -falign-loops=@var{n}
+@opindex falign-loops
+Align loops to a power-of-two boundary, skipping up to @var{n} bytes
+like @option{-falign-functions}.  The hope is that the loop will be
+executed many times, which will make up for any execution of the dummy
+operations.
+
+@option{-fno-align-loops} and @option{-falign-loops=1} are
+equivalent and mean that loops will not be aligned.
+
+If @var{n} is not specified or is zero, use a machine-dependent default.
+
+Enabled at levels @option{-O2}, @option{-O3}.
+
+@item -falign-jumps
+@itemx -falign-jumps=@var{n}
+@opindex falign-jumps
+Align branch targets to a power-of-two boundary, for branch targets
+where the targets can only be reached by jumping, skipping up to @var{n}
+bytes like @option{-falign-functions}.  In this case, no dummy operations
+need be executed.
+
+@option{-fno-align-jumps} and @option{-falign-jumps=1} are
+equivalent and mean that loops will not be aligned.
+
+If @var{n} is not specified or is zero, use a machine-dependent default.
+
+Enabled at levels @option{-O2}, @option{-O3}.
+
+@item -funit-at-a-time
+@opindex funit-at-a-time
+This option is left for compatibility reasons. @option{-funit-at-a-time}
+has no effect, while @option{-fno-unit-at-a-time} implies
+@option{-fno-toplevel-reorder} and @option{-fno-section-anchors}.
+
+Enabled by default.
+
+@item -fno-toplevel-reorder
+@opindex fno-toplevel-reorder
+Do not reorder top-level functions, variables, and @code{asm}
+statements.  Output them in the same order that they appear in the
+input file.  When this option is used, unreferenced static variables
+will not be removed.  This option is intended to support existing code
+which relies on a particular ordering.  For new code, it is better to
+use attributes.
+
+Enabled at level @option{-O0}.  When disabled explicitly, it also imply
+@option{-fno-section-anchors} that is otherwise enabled at @option{-O0} on some
+targets.
+
+@item -fweb
+@opindex fweb
+Constructs webs as commonly used for register allocation purposes and assign
+each web individual pseudo register.  This allows the register allocation pass
+to operate on pseudos directly, but also strengthens several other optimization
+passes, such as CSE, loop optimizer and trivial dead code remover.  It can,
+however, make debugging impossible, since variables will no longer stay in a
+``home register''.
+
+Enabled by default with @option{-funroll-loops}.
+
+@item -fwhole-program
+@opindex fwhole-program
+Assume that the current compilation unit represents whole program being
+compiled.  All public functions and variables with the exception of @code{main}
+and those merged by attribute @code{externally_visible} become static functions
+and in a affect gets more aggressively optimized by interprocedural optimizers.
+While this option is equivalent to proper use of @code{static} keyword for
+programs consisting of single file, in combination with option
+@option{--combine} this flag can be used to compile most of smaller scale C
+programs since the functions and variables become local for the whole combined
+compilation unit, not for the single source file itself.
+
+This option is not supported for Fortran programs.
+
+@item -fcprop-registers
+@opindex fcprop-registers
+After register allocation and post-register allocation instruction splitting,
+we perform a copy-propagation pass to try to reduce scheduling dependencies
+and occasionally eliminate the copy.
+
+Enabled at levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os}.
+
+@item -fprofile-correction
+@opindex fprofile-correction
+Profiles collected using an instrumented binary for multi-threaded programs may
+be inconsistent due to missed counter updates. When this option is specified,
+GCC will use heuristics to correct or smooth out such inconsistencies. By
+default, GCC will emit an error message when an inconsistent profile is detected.
+
+@item -fprofile-dir=@var{path}
+@opindex fprofile-dir
+
+Set the directory to search the profile data files in to @var{path}.
+This option affects only the profile data generated by
+@option{-fprofile-generate}, @option{-ftest-coverage}, @option{-fprofile-arcs}
+and used by @option{-fprofile-use} and @option{-fbranch-probabilities} 
+and its related options.
+By default, GCC will use the current directory as @var{path}
+thus the profile data file will appear in the same directory as the object file.
+
+@item -fprofile-generate
+@itemx -fprofile-generate=@var{path}
+@opindex fprofile-generate
+
+Enable options usually used for instrumenting application to produce
+profile useful for later recompilation with profile feedback based
+optimization.  You must use @option{-fprofile-generate} both when
+compiling and when linking your program.
+
+The following options are enabled: @code{-fprofile-arcs}, @code{-fprofile-values}, @code{-fvpt}.
+
+If @var{path} is specified, GCC will look at the @var{path} to find
+the profile feedback data files. See @option{-fprofile-dir}.
+
+@item -fprofile-use
+@itemx -fprofile-use=@var{path}
+@opindex fprofile-use
+Enable profile feedback directed optimizations, and optimizations
+generally profitable only with profile feedback available.
+
+The following options are enabled: @code{-fbranch-probabilities}, @code{-fvpt},
+@code{-funroll-loops}, @code{-fpeel-loops}, @code{-ftracer}
+
+By default, GCC emits an error message if the feedback profiles do not
+match the source code.  This error can be turned into a warning by using
+@option{-Wcoverage-mismatch}.  Note this may result in poorly optimized
+code.
+
+If @var{path} is specified, GCC will look at the @var{path} to find
+the profile feedback data files. See @option{-fprofile-dir}.
+@end table
+
+The following options control compiler behavior regarding floating
+point arithmetic.  These options trade off between speed and
+correctness.  All must be specifically enabled.
+
+@table @gcctabopt
+@item -ffloat-store
+@opindex ffloat-store
+Do not store floating point variables in registers, and inhibit other
+options that might change whether a floating point value is taken from a
+register or memory.
+
+@cindex floating point precision
+This option prevents undesirable excess precision on machines such as
+the 68000 where the floating registers (of the 68881) keep more
+precision than a @code{double} is supposed to have.  Similarly for the
+x86 architecture.  For most programs, the excess precision does only
+good, but a few programs rely on the precise definition of IEEE floating
+point.  Use @option{-ffloat-store} for such programs, after modifying
+them to store all pertinent intermediate computations into variables.
+
+@item -ffast-math
+@opindex ffast-math
+Sets @option{-fno-math-errno}, @option{-funsafe-math-optimizations},
+@option{-ffinite-math-only}, @option{-fno-rounding-math},
+@option{-fno-signaling-nans} and @option{-fcx-limited-range}.
+
+This option causes the preprocessor macro @code{__FAST_MATH__} to be defined.
+
+This option is not turned on by any @option{-O} option since
+it can result in incorrect output for programs which depend on
+an exact implementation of IEEE or ISO rules/specifications for
+math functions. It may, however, yield faster code for programs
+that do not require the guarantees of these specifications.
+
+@item -fno-math-errno
+@opindex fno-math-errno
+Do not set ERRNO after calling math functions that are executed
+with a single instruction, e.g., sqrt.  A program that relies on
+IEEE exceptions for math error handling may want to use this flag
+for speed while maintaining IEEE arithmetic compatibility.
+
+This option is not turned on by any @option{-O} option since
+it can result in incorrect output for programs which depend on
+an exact implementation of IEEE or ISO rules/specifications for
+math functions. It may, however, yield faster code for programs
+that do not require the guarantees of these specifications.
+
+The default is @option{-fmath-errno}.
+
+On Darwin systems, the math library never sets @code{errno}.  There is
+therefore no reason for the compiler to consider the possibility that
+it might, and @option{-fno-math-errno} is the default.
+
+@item -funsafe-math-optimizations
+@opindex funsafe-math-optimizations
+
+Allow optimizations for floating-point arithmetic that (a) assume
+that arguments and results are valid and (b) may violate IEEE or
+ANSI standards.  When used at link-time, it may include libraries
+or startup files that change the default FPU control word or other
+similar optimizations.
+
+This option is not turned on by any @option{-O} option since
+it can result in incorrect output for programs which depend on
+an exact implementation of IEEE or ISO rules/specifications for
+math functions. It may, however, yield faster code for programs
+that do not require the guarantees of these specifications.
+Enables @option{-fno-signed-zeros}, @option{-fno-trapping-math},
+@option{-fassociative-math} and @option{-freciprocal-math}.
+
+The default is @option{-fno-unsafe-math-optimizations}.
+
+@item -fassociative-math
+@opindex fassociative-math
+
+Allow re-association of operands in series of floating-point operations.
+This violates the ISO C and C++ language standard by possibly changing
+computation result.  NOTE: re-ordering may change the sign of zero as
+well as ignore NaNs and inhibit or create underflow or overflow (and
+thus cannot be used on a code which relies on rounding behavior like
+@code{(x + 2**52) - 2**52)}.  May also reorder floating-point comparisons
+and thus may not be used when ordered comparisons are required.
+This option requires that both @option{-fno-signed-zeros} and
+@option{-fno-trapping-math} be in effect.  Moreover, it doesn't make
+much sense with @option{-frounding-math}.
+
+The default is @option{-fno-associative-math}.
+
+@item -freciprocal-math
+@opindex freciprocal-math
+
+Allow the reciprocal of a value to be used instead of dividing by
+the value if this enables optimizations.  For example @code{x / y}
+can be replaced with @code{x * (1/y)} which is useful if @code{(1/y)}
+is subject to common subexpression elimination.  Note that this loses
+precision and increases the number of flops operating on the value.
+
+The default is @option{-fno-reciprocal-math}.
+
+@item -ffinite-math-only
+@opindex ffinite-math-only
+Allow optimizations for floating-point arithmetic that assume
+that arguments and results are not NaNs or +-Infs.
+
+This option is not turned on by any @option{-O} option since
+it can result in incorrect output for programs which depend on
+an exact implementation of IEEE or ISO rules/specifications for
+math functions. It may, however, yield faster code for programs
+that do not require the guarantees of these specifications.
+
+The default is @option{-fno-finite-math-only}.
+
+@item -fno-signed-zeros
+@opindex fno-signed-zeros
+Allow optimizations for floating point arithmetic that ignore the
+signedness of zero.  IEEE arithmetic specifies the behavior of
+distinct +0.0 and @minus{}0.0 values, which then prohibits simplification
+of expressions such as x+0.0 or 0.0*x (even with @option{-ffinite-math-only}).
+This option implies that the sign of a zero result isn't significant.
+
+The default is @option{-fsigned-zeros}.
+
+@item -fno-trapping-math
+@opindex fno-trapping-math
+Compile code assuming that floating-point operations cannot generate
+user-visible traps.  These traps include division by zero, overflow,
+underflow, inexact result and invalid operation.  This option requires
+that @option{-fno-signaling-nans} be in effect.  Setting this option may
+allow faster code if one relies on ``non-stop'' IEEE arithmetic, for example.
+
+This option should never be turned on by any @option{-O} option since
+it can result in incorrect output for programs which depend on
+an exact implementation of IEEE or ISO rules/specifications for
+math functions.
+
+The default is @option{-ftrapping-math}.
+
+@item -frounding-math
+@opindex frounding-math
+Disable transformations and optimizations that assume default floating
+point rounding behavior.  This is round-to-zero for all floating point
+to integer conversions, and round-to-nearest for all other arithmetic
+truncations.  This option should be specified for programs that change
+the FP rounding mode dynamically, or that may be executed with a
+non-default rounding mode.  This option disables constant folding of
+floating point expressions at compile-time (which may be affected by
+rounding mode) and arithmetic transformations that are unsafe in the
+presence of sign-dependent rounding modes.
+
+The default is @option{-fno-rounding-math}.
+
+This option is experimental and does not currently guarantee to
+disable all GCC optimizations that are affected by rounding mode.
+Future versions of GCC may provide finer control of this setting
+using C99's @code{FENV_ACCESS} pragma.  This command line option
+will be used to specify the default state for @code{FENV_ACCESS}.
+
+@item -frtl-abstract-sequences
+@opindex frtl-abstract-sequences
+It is a size optimization method. This option is to find identical
+sequences of code, which can be turned into pseudo-procedures  and
+then  replace  all  occurrences with  calls to  the  newly created
+subroutine. It is kind of an opposite of @option{-finline-functions}.
+This optimization runs at RTL level.
+
+@item -fsignaling-nans
+@opindex fsignaling-nans
+Compile code assuming that IEEE signaling NaNs may generate user-visible
+traps during floating-point operations.  Setting this option disables
+optimizations that may change the number of exceptions visible with
+signaling NaNs.  This option implies @option{-ftrapping-math}.
+
+This option causes the preprocessor macro @code{__SUPPORT_SNAN__} to
+be defined.
+
+The default is @option{-fno-signaling-nans}.
+
+This option is experimental and does not currently guarantee to
+disable all GCC optimizations that affect signaling NaN behavior.
+
+@item -fsingle-precision-constant
+@opindex fsingle-precision-constant
+Treat floating point constant as single precision constant instead of
+implicitly converting it to double precision constant.
+
+@item -fcx-limited-range
+@opindex fcx-limited-range
+When enabled, this option states that a range reduction step is not
+needed when performing complex division.  Also, there is no checking
+whether the result of a complex multiplication or division is @code{NaN
++ I*NaN}, with an attempt to rescue the situation in that case.  The
+default is @option{-fno-cx-limited-range}, but is enabled by
+@option{-ffast-math}.
+
+This option controls the default setting of the ISO C99
+@code{CX_LIMITED_RANGE} pragma.  Nevertheless, the option applies to
+all languages.
+
+@item -fcx-fortran-rules
+@opindex fcx-fortran-rules
+Complex multiplication and division follow Fortran rules.  Range
+reduction is done as part of complex division, but there is no checking
+whether the result of a complex multiplication or division is @code{NaN
++ I*NaN}, with an attempt to rescue the situation in that case.
+
+The default is @option{-fno-cx-fortran-rules}.
+
+@end table
+
+The following options control optimizations that may improve
+performance, but are not enabled by any @option{-O} options.  This
+section includes experimental options that may produce broken code.
+
+@table @gcctabopt
+@item -fbranch-probabilities
+@opindex fbranch-probabilities
+After running a program compiled with @option{-fprofile-arcs}
+(@pxref{Debugging Options,, Options for Debugging Your Program or
+@command{gcc}}), you can compile it a second time using
+@option{-fbranch-probabilities}, to improve optimizations based on
+the number of times each branch was taken.  When the program
+compiled with @option{-fprofile-arcs} exits it saves arc execution
+counts to a file called @file{@var{sourcename}.gcda} for each source
+file.  The information in this data file is very dependent on the
+structure of the generated code, so you must use the same source code
+and the same optimization options for both compilations.
+
+With @option{-fbranch-probabilities}, GCC puts a
+@samp{REG_BR_PROB} note on each @samp{JUMP_INSN} and @samp{CALL_INSN}.
+These can be used to improve optimization.  Currently, they are only
+used in one place: in @file{reorg.c}, instead of guessing which path a
+branch is mostly to take, the @samp{REG_BR_PROB} values are used to
+exactly determine which path is taken more often.
+
+@item -fprofile-values
+@opindex fprofile-values
+If combined with @option{-fprofile-arcs}, it adds code so that some
+data about values of expressions in the program is gathered.
+
+With @option{-fbranch-probabilities}, it reads back the data gathered
+from profiling values of expressions and adds @samp{REG_VALUE_PROFILE}
+notes to instructions for their later usage in optimizations.
+
+Enabled with @option{-fprofile-generate} and @option{-fprofile-use}.
+
+@item -fvpt
+@opindex fvpt
+If combined with @option{-fprofile-arcs}, it instructs the compiler to add
+a code to gather information about values of expressions.
+
+With @option{-fbranch-probabilities}, it reads back the data gathered
+and actually performs the optimizations based on them.
+Currently the optimizations include specialization of division operation
+using the knowledge about the value of the denominator.
+
+@item -frename-registers
+@opindex frename-registers
+Attempt to avoid false dependencies in scheduled code by making use
+of registers left over after register allocation.  This optimization
+will most benefit processors with lots of registers.  Depending on the
+debug information format adopted by the target, however, it can
+make debugging impossible, since variables will no longer stay in
+a ``home register''.
+
+Enabled by default with @option{-funroll-loops}.
+
+@item -ftracer
+@opindex ftracer
+Perform tail duplication to enlarge superblock size.  This transformation
+simplifies the control flow of the function allowing other optimizations to do
+better job.
+
+Enabled with @option{-fprofile-use}.
+
+@item -funroll-loops
+@opindex funroll-loops
+Unroll loops whose number of iterations can be determined at compile time or
+upon entry to the loop.  @option{-funroll-loops} implies
+@option{-frerun-cse-after-loop}, @option{-fweb} and @option{-frename-registers}.
+It also turns on complete loop peeling (i.e.@: complete removal of loops with
+small constant number of iterations).  This option makes code larger, and may
+or may not make it run faster.
+
+Enabled with @option{-fprofile-use}.
+
+@item -funroll-all-loops
+@opindex funroll-all-loops
+Unroll all loops, even if their number of iterations is uncertain when
+the loop is entered.  This usually makes programs run more slowly.
+@option{-funroll-all-loops} implies the same options as
+@option{-funroll-loops}.
+
+@item -fpeel-loops
+@opindex fpeel-loops
+Peels the loops for that there is enough information that they do not
+roll much (from profile feedback).  It also turns on complete loop peeling
+(i.e.@: complete removal of loops with small constant number of iterations).
+
+Enabled with @option{-fprofile-use}.
+
+@item -fmove-loop-invariants
+@opindex fmove-loop-invariants
+Enables the loop invariant motion pass in the RTL loop optimizer.  Enabled
+at level @option{-O1}
+
+@item -funswitch-loops
+@opindex funswitch-loops
+Move branches with loop invariant conditions out of the loop, with duplicates
+of the loop on both branches (modified according to result of the condition).
+
+@item -ffunction-sections
+@itemx -fdata-sections
+@opindex ffunction-sections
+@opindex fdata-sections
+Place each function or data item into its own section in the output
+file if the target supports arbitrary sections.  The name of the
+function or the name of the data item determines the section's name
+in the output file.
+
+Use these options on systems where the linker can perform optimizations
+to improve locality of reference in the instruction space.  Most systems
+using the ELF object format and SPARC processors running Solaris 2 have
+linkers with such optimizations.  AIX may have these optimizations in
+the future.
+
+Only use these options when there are significant benefits from doing
+so.  When you specify these options, the assembler and linker will
+create larger object and executable files and will also be slower.
+You will not be able to use @code{gprof} on all systems if you
+specify this option and you may have problems with debugging if
+you specify both this option and @option{-g}.
+
+@item -fbranch-target-load-optimize
+@opindex fbranch-target-load-optimize
+Perform branch target register load optimization before prologue / epilogue
+threading.
+The use of target registers can typically be exposed only during reload,
+thus hoisting loads out of loops and doing inter-block scheduling needs
+a separate optimization pass.
+
+@item -fbranch-target-load-optimize2
+@opindex fbranch-target-load-optimize2
+Perform branch target register load optimization after prologue / epilogue
+threading.
+
+@item -fbtr-bb-exclusive
+@opindex fbtr-bb-exclusive
+When performing branch target register load optimization, don't reuse
+branch target registers in within any basic block.
+
+@item -fstack-protector
+@opindex fstack-protector
+Emit extra code to check for buffer overflows, such as stack smashing
+attacks.  This is done by adding a guard variable to functions with
+vulnerable objects.  This includes functions that call alloca, and
+functions with buffers larger than 8 bytes.  The guards are initialized
+when a function is entered and then checked when the function exits.
+If a guard check fails, an error message is printed and the program exits.
+
+@item -fstack-protector-all
+@opindex fstack-protector-all
+Like @option{-fstack-protector} except that all functions are protected.
+
+@item -fsection-anchors
+@opindex fsection-anchors
+Try to reduce the number of symbolic address calculations by using
+shared ``anchor'' symbols to address nearby objects.  This transformation
+can help to reduce the number of GOT entries and GOT accesses on some
+targets.
+
+For example, the implementation of the following function @code{foo}:
+
+@smallexample
+static int a, b, c;
+int foo (void) @{ return a + b + c; @}
+@end smallexample
+
+would usually calculate the addresses of all three variables, but if you
+compile it with @option{-fsection-anchors}, it will access the variables
+from a common anchor point instead.  The effect is similar to the
+following pseudocode (which isn't valid C):
+
+@smallexample
+int foo (void)
+@{
+  register int *xr = &x;
+  return xr[&a - &x] + xr[&b - &x] + xr[&c - &x];
+@}
+@end smallexample
+
+Not all targets support this option.
+
+@item --param @var{name}=@var{value}
+@opindex param
+In some places, GCC uses various constants to control the amount of
+optimization that is done.  For example, GCC will not inline functions
+that contain more that a certain number of instructions.  You can
+control some of these constants on the command-line using the
+@option{--param} option.
+
+The names of specific parameters, and the meaning of the values, are
+tied to the internals of the compiler, and are subject to change
+without notice in future releases.
+
+In each case, the @var{value} is an integer.  The allowable choices for
+@var{name} are given in the following table:
+
+@table @gcctabopt
+@item sra-max-structure-size
+The maximum structure size, in bytes, at which the scalar replacement
+of aggregates (SRA) optimization will perform block copies.  The
+default value, 0, implies that GCC will select the most appropriate
+size itself.
+
+@item sra-field-structure-ratio
+The threshold ratio (as a percentage) between instantiated fields and
+the complete structure size.  We say that if the ratio of the number
+of bytes in instantiated fields to the number of bytes in the complete
+structure exceeds this parameter, then block copies are not used.  The
+default is 75.
+
+@item struct-reorg-cold-struct-ratio
+The threshold ratio (as a percentage) between a structure frequency
+and the frequency of the hottest structure in the program.  This parameter
+is used by struct-reorg optimization enabled by @option{-fipa-struct-reorg}.
+We say that if the ratio of a structure frequency, calculated by profiling, 
+to the hottest structure frequency in the program is less than this 
+parameter, then structure reorganization is not applied to this structure.
+The default is 10.
+
+@item predictable-branch-cost-outcome
+When branch is predicted to be taken with probability lower than this threshold
+(in percent), then it is considered well predictable. The default is 10.
+
+@item max-crossjump-edges
+The maximum number of incoming edges to consider for crossjumping.
+The algorithm used by @option{-fcrossjumping} is @math{O(N^2)} in
+the number of edges incoming to each block.  Increasing values mean
+more aggressive optimization, making the compile time increase with
+probably small improvement in executable size.
+
+@item min-crossjump-insns
+The minimum number of instructions which must be matched at the end
+of two blocks before crossjumping will be performed on them.  This
+value is ignored in the case where all instructions in the block being
+crossjumped from are matched.  The default value is 5.
+
+@item max-grow-copy-bb-insns
+The maximum code size expansion factor when copying basic blocks
+instead of jumping.  The expansion is relative to a jump instruction.
+The default value is 8.
+
+@item max-goto-duplication-insns
+The maximum number of instructions to duplicate to a block that jumps
+to a computed goto.  To avoid @math{O(N^2)} behavior in a number of
+passes, GCC factors computed gotos early in the compilation process,
+and unfactors them as late as possible.  Only computed jumps at the
+end of a basic blocks with no more than max-goto-duplication-insns are
+unfactored.  The default value is 8.
+
+@item max-delay-slot-insn-search
+The maximum number of instructions to consider when looking for an
+instruction to fill a delay slot.  If more than this arbitrary number of
+instructions is searched, the time savings from filling the delay slot
+will be minimal so stop searching.  Increasing values mean more
+aggressive optimization, making the compile time increase with probably
+small improvement in executable run time.
+
+@item max-delay-slot-live-search
+When trying to fill delay slots, the maximum number of instructions to
+consider when searching for a block with valid live register
+information.  Increasing this arbitrarily chosen value means more
+aggressive optimization, increasing the compile time.  This parameter
+should be removed when the delay slot code is rewritten to maintain the
+control-flow graph.
+
+@item max-gcse-memory
+The approximate maximum amount of memory that will be allocated in
+order to perform the global common subexpression elimination
+optimization.  If more memory than specified is required, the
+optimization will not be done.
+
+@item max-gcse-passes
+The maximum number of passes of GCSE to run.  The default is 1.
+
+@item max-pending-list-length
+The maximum number of pending dependencies scheduling will allow
+before flushing the current state and starting over.  Large functions
+with few branches or calls can create excessively large lists which
+needlessly consume memory and resources.
+
+@item max-inline-insns-single
+Several parameters control the tree inliner used in gcc.
+This number sets the maximum number of instructions (counted in GCC's
+internal representation) in a single function that the tree inliner
+will consider for inlining.  This only affects functions declared
+inline and methods implemented in a class declaration (C++).
+The default value is 450.
+
+@item max-inline-insns-auto
+When you use @option{-finline-functions} (included in @option{-O3}),
+a lot of functions that would otherwise not be considered for inlining
+by the compiler will be investigated.  To those functions, a different
+(more restrictive) limit compared to functions declared inline can
+be applied.
+The default value is 90.
+
+@item large-function-insns
+The limit specifying really large functions.  For functions larger than this
+limit after inlining, inlining is constrained by
+@option{--param large-function-growth}.  This parameter is useful primarily
+to avoid extreme compilation time caused by non-linear algorithms used by the
+backend.
+The default value is 2700.
+
+@item large-function-growth
+Specifies maximal growth of large function caused by inlining in percents.
+The default value is 100 which limits large function growth to 2.0 times
+the original size.
+
+@item large-unit-insns
+The limit specifying large translation unit.  Growth caused by inlining of
+units larger than this limit is limited by @option{--param inline-unit-growth}.
+For small units this might be too tight (consider unit consisting of function A
+that is inline and B that just calls A three time.  If B is small relative to
+A, the growth of unit is 300\% and yet such inlining is very sane.  For very
+large units consisting of small inlineable functions however the overall unit
+growth limit is needed to avoid exponential explosion of code size.  Thus for
+smaller units, the size is increased to @option{--param large-unit-insns}
+before applying @option{--param inline-unit-growth}.  The default is 10000
+
+@item inline-unit-growth
+Specifies maximal overall growth of the compilation unit caused by inlining.
+The default value is 30 which limits unit growth to 1.3 times the original
+size.
+
+@item ipcp-unit-growth
+Specifies maximal overall growth of the compilation unit caused by
+interprocedural constant propagation.  The default value is 10 which limits
+unit growth to 1.1 times the original size.
+
+@item large-stack-frame
+The limit specifying large stack frames.  While inlining the algorithm is trying
+to not grow past this limit too much.  Default value is 256 bytes.
+
+@item large-stack-frame-growth
+Specifies maximal growth of large stack frames caused by inlining in percents.
+The default value is 1000 which limits large stack frame growth to 11 times
+the original size.
+
+@item max-inline-insns-recursive
+@itemx max-inline-insns-recursive-auto
+Specifies maximum number of instructions out-of-line copy of self recursive inline
+function can grow into by performing recursive inlining.
+
+For functions declared inline @option{--param max-inline-insns-recursive} is
+taken into account.  For function not declared inline, recursive inlining
+happens only when @option{-finline-functions} (included in @option{-O3}) is
+enabled and @option{--param max-inline-insns-recursive-auto} is used.  The
+default value is 450.
+
+@item max-inline-recursive-depth
+@itemx max-inline-recursive-depth-auto
+Specifies maximum recursion depth used by the recursive inlining.
+
+For functions declared inline @option{--param max-inline-recursive-depth} is
+taken into account.  For function not declared inline, recursive inlining
+happens only when @option{-finline-functions} (included in @option{-O3}) is
+enabled and @option{--param max-inline-recursive-depth-auto} is used.  The
+default value is 8.
+
+@item min-inline-recursive-probability
+Recursive inlining is profitable only for function having deep recursion
+in average and can hurt for function having little recursion depth by
+increasing the prologue size or complexity of function body to other
+optimizers.
+
+When profile feedback is available (see @option{-fprofile-generate}) the actual
+recursion depth can be guessed from probability that function will recurse via
+given call expression.  This parameter limits inlining only to call expression
+whose probability exceeds given threshold (in percents).  The default value is
+10.
+
+@item inline-call-cost
+Specify cost of call instruction relative to simple arithmetics operations
+(having cost of 1).  Increasing this cost disqualifies inlining of non-leaf
+functions and at the same time increases size of leaf function that is believed to
+reduce function size by being inlined.  In effect it increases amount of
+inlining for code having large abstraction penalty (many functions that just
+pass the arguments to other functions) and decrease inlining for code with low
+abstraction penalty.  The default value is 12.
+
+@item min-vect-loop-bound
+The minimum number of iterations under which a loop will not get vectorized
+when @option{-ftree-vectorize} is used.  The number of iterations after
+vectorization needs to be greater than the value specified by this option
+to allow vectorization.  The default value is 0.
+
+@item max-unrolled-insns
+The maximum number of instructions that a loop should have if that loop
+is unrolled, and if the loop is unrolled, it determines how many times
+the loop code is unrolled.
+
+@item max-average-unrolled-insns
+The maximum number of instructions biased by probabilities of their execution
+that a loop should have if that loop is unrolled, and if the loop is unrolled,
+it determines how many times the loop code is unrolled.
+
+@item max-unroll-times
+The maximum number of unrollings of a single loop.
+
+@item max-peeled-insns
+The maximum number of instructions that a loop should have if that loop
+is peeled, and if the loop is peeled, it determines how many times
+the loop code is peeled.
+
+@item max-peel-times
+The maximum number of peelings of a single loop.
+
+@item max-completely-peeled-insns
+The maximum number of insns of a completely peeled loop.
+
+@item max-completely-peel-times
+The maximum number of iterations of a loop to be suitable for complete peeling.
+
+@item max-unswitch-insns
+The maximum number of insns of an unswitched loop.
+
+@item max-unswitch-level
+The maximum number of branches unswitched in a single loop.
+
+@item lim-expensive
+The minimum cost of an expensive expression in the loop invariant motion.
+
+@item iv-consider-all-candidates-bound
+Bound on number of candidates for induction variables below that
+all candidates are considered for each use in induction variable
+optimizations.  Only the most relevant candidates are considered
+if there are more candidates, to avoid quadratic time complexity.
+
+@item iv-max-considered-uses
+The induction variable optimizations give up on loops that contain more
+induction variable uses.
+
+@item iv-always-prune-cand-set-bound
+If number of candidates in the set is smaller than this value,
+we always try to remove unnecessary ivs from the set during its
+optimization when a new iv is added to the set.
+
+@item scev-max-expr-size
+Bound on size of expressions used in the scalar evolutions analyzer.
+Large expressions slow the analyzer.
+
+@item omega-max-vars
+The maximum number of variables in an Omega constraint system.
+The default value is 128.
+
+@item omega-max-geqs
+The maximum number of inequalities in an Omega constraint system.
+The default value is 256.
+
+@item omega-max-eqs
+The maximum number of equalities in an Omega constraint system.
+The default value is 128.
+
+@item omega-max-wild-cards
+The maximum number of wildcard variables that the Omega solver will
+be able to insert.  The default value is 18.
+
+@item omega-hash-table-size
+The size of the hash table in the Omega solver.  The default value is
+550.
+
+@item omega-max-keys
+The maximal number of keys used by the Omega solver.  The default
+value is 500.
+
+@item omega-eliminate-redundant-constraints
+When set to 1, use expensive methods to eliminate all redundant
+constraints.  The default value is 0.
+
+@item vect-max-version-for-alignment-checks
+The maximum number of runtime checks that can be performed when
+doing loop versioning for alignment in the vectorizer.  See option
+ftree-vect-loop-version for more information.
+
+@item vect-max-version-for-alias-checks
+The maximum number of runtime checks that can be performed when
+doing loop versioning for alias in the vectorizer.  See option
+ftree-vect-loop-version for more information.
+
+@item max-iterations-to-track
+
+The maximum number of iterations of a loop the brute force algorithm
+for analysis of # of iterations of the loop tries to evaluate.
+
+@item hot-bb-count-fraction
+Select fraction of the maximal count of repetitions of basic block in program
+given basic block needs to have to be considered hot.
+
+@item hot-bb-frequency-fraction
+Select fraction of the maximal frequency of executions of basic block in
+function given basic block needs to have to be considered hot
+
+@item max-predicted-iterations
+The maximum number of loop iterations we predict statically.  This is useful
+in cases where function contain single loop with known bound and other loop
+with unknown.  We predict the known number of iterations correctly, while
+the unknown number of iterations average to roughly 10.  This means that the
+loop without bounds would appear artificially cold relative to the other one.
+
+@item align-threshold
+
+Select fraction of the maximal frequency of executions of basic block in
+function given basic block will get aligned.
+
+@item align-loop-iterations
+
+A loop expected to iterate at lest the selected number of iterations will get
+aligned.
+
+@item tracer-dynamic-coverage
+@itemx tracer-dynamic-coverage-feedback
+
+This value is used to limit superblock formation once the given percentage of
+executed instructions is covered.  This limits unnecessary code size
+expansion.
+
+The @option{tracer-dynamic-coverage-feedback} is used only when profile
+feedback is available.  The real profiles (as opposed to statically estimated
+ones) are much less balanced allowing the threshold to be larger value.
+
+@item tracer-max-code-growth
+Stop tail duplication once code growth has reached given percentage.  This is
+rather hokey argument, as most of the duplicates will be eliminated later in
+cross jumping, so it may be set to much higher values than is the desired code
+growth.
+
+@item tracer-min-branch-ratio
+
+Stop reverse growth when the reverse probability of best edge is less than this
+threshold (in percent).
+
+@item tracer-min-branch-ratio
+@itemx tracer-min-branch-ratio-feedback
+
+Stop forward growth if the best edge do have probability lower than this
+threshold.
+
+Similarly to @option{tracer-dynamic-coverage} two values are present, one for
+compilation for profile feedback and one for compilation without.  The value
+for compilation with profile feedback needs to be more conservative (higher) in
+order to make tracer effective.
+
+@item max-cse-path-length
+
+Maximum number of basic blocks on path that cse considers.  The default is 10.
+
+@item max-cse-insns
+The maximum instructions CSE process before flushing. The default is 1000.
+
+@item max-aliased-vops
+
+Maximum number of virtual operands per function allowed to represent
+aliases before triggering the alias partitioning heuristic.  Alias
+partitioning reduces compile times and memory consumption needed for
+aliasing at the expense of precision loss in alias information.  The
+default value for this parameter is 100 for -O1, 500 for -O2 and 1000
+for -O3.
+
+Notice that if a function contains more memory statements than the
+value of this parameter, it is not really possible to achieve this
+reduction.  In this case, the compiler will use the number of memory
+statements as the value for @option{max-aliased-vops}.
+
+@item avg-aliased-vops
+
+Average number of virtual operands per statement allowed to represent
+aliases before triggering the alias partitioning heuristic.  This
+works in conjunction with @option{max-aliased-vops}.  If a function
+contains more than @option{max-aliased-vops} virtual operators, then
+memory symbols will be grouped into memory partitions until either the
+total number of virtual operators is below @option{max-aliased-vops}
+or the average number of virtual operators per memory statement is
+below @option{avg-aliased-vops}.  The default value for this parameter
+is 1 for -O1 and -O2, and 3 for -O3.
+
+@item ggc-min-expand
+
+GCC uses a garbage collector to manage its own memory allocation.  This
+parameter specifies the minimum percentage by which the garbage
+collector's heap should be allowed to expand between collections.
+Tuning this may improve compilation speed; it has no effect on code
+generation.
+
+The default is 30% + 70% * (RAM/1GB) with an upper bound of 100% when
+RAM >= 1GB@.  If @code{getrlimit} is available, the notion of "RAM" is
+the smallest of actual RAM and @code{RLIMIT_DATA} or @code{RLIMIT_AS}.  If
+GCC is not able to calculate RAM on a particular platform, the lower
+bound of 30% is used.  Setting this parameter and
+@option{ggc-min-heapsize} to zero causes a full collection to occur at
+every opportunity.  This is extremely slow, but can be useful for
+debugging.
+
+@item ggc-min-heapsize
+
+Minimum size of the garbage collector's heap before it begins bothering
+to collect garbage.  The first collection occurs after the heap expands
+by @option{ggc-min-expand}% beyond @option{ggc-min-heapsize}.  Again,
+tuning this may improve compilation speed, and has no effect on code
+generation.
+
+The default is the smaller of RAM/8, RLIMIT_RSS, or a limit which
+tries to ensure that RLIMIT_DATA or RLIMIT_AS are not exceeded, but
+with a lower bound of 4096 (four megabytes) and an upper bound of
+131072 (128 megabytes).  If GCC is not able to calculate RAM on a
+particular platform, the lower bound is used.  Setting this parameter
+very large effectively disables garbage collection.  Setting this
+parameter and @option{ggc-min-expand} to zero causes a full collection
+to occur at every opportunity.
+
+@item max-reload-search-insns
+The maximum number of instruction reload should look backward for equivalent
+register.  Increasing values mean more aggressive optimization, making the
+compile time increase with probably slightly better performance.  The default
+value is 100.
+
+@item max-cselib-memory-locations
+The maximum number of memory locations cselib should take into account.
+Increasing values mean more aggressive optimization, making the compile time
+increase with probably slightly better performance.  The default value is 500.
+
+@item reorder-blocks-duplicate
+@itemx reorder-blocks-duplicate-feedback
+
+Used by basic block reordering pass to decide whether to use unconditional
+branch or duplicate the code on its destination.  Code is duplicated when its
+estimated size is smaller than this value multiplied by the estimated size of
+unconditional jump in the hot spots of the program.
+
+The @option{reorder-block-duplicate-feedback} is used only when profile
+feedback is available and may be set to higher values than
+@option{reorder-block-duplicate} since information about the hot spots is more
+accurate.
+
+@item max-sched-ready-insns
+The maximum number of instructions ready to be issued the scheduler should
+consider at any given time during the first scheduling pass.  Increasing
+values mean more thorough searches, making the compilation time increase
+with probably little benefit.  The default value is 100.
+
+@item max-sched-region-blocks
+The maximum number of blocks in a region to be considered for
+interblock scheduling.  The default value is 10.
+
+@item max-pipeline-region-blocks
+The maximum number of blocks in a region to be considered for
+pipelining in the selective scheduler.  The default value is 15.
+
+@item max-sched-region-insns
+The maximum number of insns in a region to be considered for
+interblock scheduling.  The default value is 100.
+
+@item max-pipeline-region-insns
+The maximum number of insns in a region to be considered for
+pipelining in the selective scheduler.  The default value is 200.
+
+@item min-spec-prob
+The minimum probability (in percents) of reaching a source block
+for interblock speculative scheduling.  The default value is 40.
+
+@item max-sched-extend-regions-iters
+The maximum number of iterations through CFG to extend regions.
+0 - disable region extension,
+N - do at most N iterations.
+The default value is 0.
+
+@item max-sched-insn-conflict-delay
+The maximum conflict delay for an insn to be considered for speculative motion.
+The default value is 3.
+
+@item sched-spec-prob-cutoff
+The minimal probability of speculation success (in percents), so that
+speculative insn will be scheduled.
+The default value is 40.
+
+@item sched-mem-true-dep-cost
+Minimal distance (in CPU cycles) between store and load targeting same
+memory locations.  The default value is 1.
+
+@item selsched-max-lookahead
+The maximum size of the lookahead window of selective scheduling.  It is a
+depth of search for available instructions.
+The default value is 50.
+
+@item selsched-max-sched-times
+The maximum number of times that an instruction will be scheduled during 
+selective scheduling.  This is the limit on the number of iterations 
+through which the instruction may be pipelined.  The default value is 2.
+
+@item selsched-max-insns-to-rename
+The maximum number of best instructions in the ready list that are considered
+for renaming in the selective scheduler.  The default value is 2.
+
+@item max-last-value-rtl
+The maximum size measured as number of RTLs that can be recorded in an expression
+in combiner for a pseudo register as last known value of that register.  The default
+is 10000.
+
+@item integer-share-limit
+Small integer constants can use a shared data structure, reducing the
+compiler's memory usage and increasing its speed.  This sets the maximum
+value of a shared integer constant.  The default value is 256.
+
+@item min-virtual-mappings
+Specifies the minimum number of virtual mappings in the incremental
+SSA updater that should be registered to trigger the virtual mappings
+heuristic defined by virtual-mappings-ratio.  The default value is
+100.
+
+@item virtual-mappings-ratio
+If the number of virtual mappings is virtual-mappings-ratio bigger
+than the number of virtual symbols to be updated, then the incremental
+SSA updater switches to a full update for those symbols.  The default
+ratio is 3.
+
+@item ssp-buffer-size
+The minimum size of buffers (i.e.@: arrays) that will receive stack smashing
+protection when @option{-fstack-protection} is used.
+
+@item max-jump-thread-duplication-stmts
+Maximum number of statements allowed in a block that needs to be
+duplicated when threading jumps.
+
+@item max-fields-for-field-sensitive
+Maximum number of fields in a structure we will treat in
+a field sensitive manner during pointer analysis.  The default is zero
+for -O0, and -O1 and 100 for -Os, -O2, and -O3.
+
+@item prefetch-latency
+Estimate on average number of instructions that are executed before
+prefetch finishes.  The distance we prefetch ahead is proportional
+to this constant.  Increasing this number may also lead to less
+streams being prefetched (see @option{simultaneous-prefetches}).
+
+@item simultaneous-prefetches
+Maximum number of prefetches that can run at the same time.
+
+@item l1-cache-line-size
+The size of cache line in L1 cache, in bytes.
+
+@item l1-cache-size
+The size of L1 cache, in kilobytes.
+
+@item l2-cache-size
+The size of L2 cache, in kilobytes.
+
+@item use-canonical-types
+Whether the compiler should use the ``canonical'' type system.  By
+default, this should always be 1, which uses a more efficient internal
+mechanism for comparing types in C++ and Objective-C++.  However, if
+bugs in the canonical type system are causing compilation failures,
+set this value to 0 to disable canonical types.
+
+@item switch-conversion-max-branch-ratio
+Switch initialization conversion will refuse to create arrays that are
+bigger than @option{switch-conversion-max-branch-ratio} times the number of
+branches in the switch.
+
+@item max-partial-antic-length
+Maximum length of the partial antic set computed during the tree
+partial redundancy elimination optimization (@option{-ftree-pre}) when
+optimizing at @option{-O3} and above.  For some sorts of source code
+the enhanced partial redundancy elimination optimization can run away,
+consuming all of the memory available on the host machine.  This
+parameter sets a limit on the length of the sets that are computed,
+which prevents the runaway behavior.  Setting a value of 0 for
+this parameter will allow an unlimited set length.
+
+@item sccvn-max-scc-size
+Maximum size of a strongly connected component (SCC) during SCCVN
+processing.  If this limit is hit, SCCVN processing for the whole
+function will not be done and optimizations depending on it will
+be disabled.  The default maximum SCC size is 10000.
+
+@item ira-max-loops-num
+IRA uses a regional register allocation by default.  If a function
+contains loops more than number given by the parameter, only at most
+given number of the most frequently executed loops will form regions
+for the regional register allocation.  The default value of the
+parameter is 100.
+
+@item ira-max-conflict-table-size
+Although IRA uses a sophisticated algorithm of compression conflict
+table, the table can be still big for huge functions.  If the conflict
+table for a function could be more than size in MB given by the
+parameter, the conflict table is not built and faster, simpler, and
+lower quality register allocation algorithm will be used.  The
+algorithm do not use pseudo-register conflicts.  The default value of
+the parameter is 2000.
+
+@item loop-invariant-max-bbs-in-loop
+Loop invariant motion can be very expensive, both in compile time and
+in amount of needed compile time memory, with very large loops.  Loops
+with more basic blocks than this parameter won't have loop invariant
+motion optimization performed on them.  The default value of the
+parameter is 1000 for -O1 and 10000 for -O2 and above.
+
+@end table
+@end table
+
+@node Preprocessor Options
+@section Options Controlling the Preprocessor
+@cindex preprocessor options
+@cindex options, preprocessor
+
+These options control the C preprocessor, which is run on each C source
+file before actual compilation.
+
+If you use the @option{-E} option, nothing is done except preprocessing.
+Some of these options make sense only together with @option{-E} because
+they cause the preprocessor output to be unsuitable for actual
+compilation.
+
+@table @gcctabopt
+@opindex Wp
+You can use @option{-Wp,@var{option}} to bypass the compiler driver
+and pass @var{option} directly through to the preprocessor.  If
+@var{option} contains commas, it is split into multiple options at the
+commas.  However, many options are modified, translated or interpreted
+by the compiler driver before being passed to the preprocessor, and
+@option{-Wp} forcibly bypasses this phase.  The preprocessor's direct
+interface is undocumented and subject to change, so whenever possible
+you should avoid using @option{-Wp} and let the driver handle the
+options instead.
+
+@item -Xpreprocessor @var{option}
+@opindex preprocessor
+Pass @var{option} as an option to the preprocessor.  You can use this to
+supply system-specific preprocessor options which GCC does not know how to
+recognize.
+
+If you want to pass an option that takes an argument, you must use
+@option{-Xpreprocessor} twice, once for the option and once for the argument.
+@end table
+
+@include cppopts.texi
+
+@node Assembler Options
+@section Passing Options to the Assembler
+
+@c prevent bad page break with this line
+You can pass options to the assembler.
+
+@table @gcctabopt
+@item -Wa,@var{option}
+@opindex Wa
+Pass @var{option} as an option to the assembler.  If @var{option}
+contains commas, it is split into multiple options at the commas.
+
+@item -Xassembler @var{option}
+@opindex Xassembler
+Pass @var{option} as an option to the assembler.  You can use this to
+supply system-specific assembler options which GCC does not know how to
+recognize.
+
+If you want to pass an option that takes an argument, you must use
+@option{-Xassembler} twice, once for the option and once for the argument.
+
+@end table
+
+@node Link Options
+@section Options for Linking
+@cindex link options
+@cindex options, linking
+
+These options come into play when the compiler links object files into
+an executable output file.  They are meaningless if the compiler is
+not doing a link step.
+
+@table @gcctabopt
+@cindex file names
+@item @var{object-file-name}
+A file name that does not end in a special recognized suffix is
+considered to name an object file or library.  (Object files are
+distinguished from libraries by the linker according to the file
+contents.)  If linking is done, these object files are used as input
+to the linker.
+
+@item -c
+@itemx -S
+@itemx -E
+@opindex c
+@opindex S
+@opindex E
+If any of these options is used, then the linker is not run, and
+object file names should not be used as arguments.  @xref{Overall
+Options}.
+
+@cindex Libraries
+@item -l@var{library}
+@itemx -l @var{library}
+@opindex l
+Search the library named @var{library} when linking.  (The second
+alternative with the library as a separate argument is only for
+POSIX compliance and is not recommended.)
+
+It makes a difference where in the command you write this option; the
+linker searches and processes libraries and object files in the order they
+are specified.  Thus, @samp{foo.o -lz bar.o} searches library @samp{z}
+after file @file{foo.o} but before @file{bar.o}.  If @file{bar.o} refers
+to functions in @samp{z}, those functions may not be loaded.
+
+The linker searches a standard list of directories for the library,
+which is actually a file named @file{lib@var{library}.a}.  The linker
+then uses this file as if it had been specified precisely by name.
+
+The directories searched include several standard system directories
+plus any that you specify with @option{-L}.
+
+Normally the files found this way are library files---archive files
+whose members are object files.  The linker handles an archive file by
+scanning through it for members which define symbols that have so far
+been referenced but not defined.  But if the file that is found is an
+ordinary object file, it is linked in the usual fashion.  The only
+difference between using an @option{-l} option and specifying a file name
+is that @option{-l} surrounds @var{library} with @samp{lib} and @samp{.a}
+and searches several directories.
+
+@item -lobjc
+@opindex lobjc
+You need this special case of the @option{-l} option in order to
+link an Objective-C or Objective-C++ program.
+
+@item -nostartfiles
+@opindex nostartfiles
+Do not use the standard system startup files when linking.
+The standard system libraries are used normally, unless @option{-nostdlib}
+or @option{-nodefaultlibs} is used.
+
+@item -nodefaultlibs
+@opindex nodefaultlibs
+Do not use the standard system libraries when linking.
+Only the libraries you specify will be passed to the linker.
+The standard startup files are used normally, unless @option{-nostartfiles}
+is used.  The compiler may generate calls to @code{memcmp},
+@code{memset}, @code{memcpy} and @code{memmove}.
+These entries are usually resolved by entries in
+libc.  These entry points should be supplied through some other
+mechanism when this option is specified.
+
+@item -nostdlib
+@opindex nostdlib
+Do not use the standard system startup files or libraries when linking.
+No startup files and only the libraries you specify will be passed to
+the linker.  The compiler may generate calls to @code{memcmp}, @code{memset},
+@code{memcpy} and @code{memmove}.
+These entries are usually resolved by entries in
+libc.  These entry points should be supplied through some other
+mechanism when this option is specified.
+
+@cindex @option{-lgcc}, use with @option{-nostdlib}
+@cindex @option{-nostdlib} and unresolved references
+@cindex unresolved references and @option{-nostdlib}
+@cindex @option{-lgcc}, use with @option{-nodefaultlibs}
+@cindex @option{-nodefaultlibs} and unresolved references
+@cindex unresolved references and @option{-nodefaultlibs}
+One of the standard libraries bypassed by @option{-nostdlib} and
+@option{-nodefaultlibs} is @file{libgcc.a}, a library of internal subroutines
+that GCC uses to overcome shortcomings of particular machines, or special
+needs for some languages.
+(@xref{Interface,,Interfacing to GCC Output,gccint,GNU Compiler
+Collection (GCC) Internals},
+for more discussion of @file{libgcc.a}.)
+In most cases, you need @file{libgcc.a} even when you want to avoid
+other standard libraries.  In other words, when you specify @option{-nostdlib}
+or @option{-nodefaultlibs} you should usually specify @option{-lgcc} as well.
+This ensures that you have no unresolved references to internal GCC
+library subroutines.  (For example, @samp{__main}, used to ensure C++
+constructors will be called; @pxref{Collect2,,@code{collect2}, gccint,
+GNU Compiler Collection (GCC) Internals}.)
+
+@item -pie
+@opindex pie
+Produce a position independent executable on targets which support it.
+For predictable results, you must also specify the same set of options
+that were used to generate code (@option{-fpie}, @option{-fPIE},
+or model suboptions) when you specify this option.
+
+@item -rdynamic
+@opindex rdynamic
+Pass the flag @option{-export-dynamic} to the ELF linker, on targets
+that support it. This instructs the linker to add all symbols, not
+only used ones, to the dynamic symbol table. This option is needed
+for some uses of @code{dlopen} or to allow obtaining backtraces
+from within a program.
+
+@item -s
+@opindex s
+Remove all symbol table and relocation information from the executable.
+
+@item -static
+@opindex static
+On systems that support dynamic linking, this prevents linking with the shared
+libraries.  On other systems, this option has no effect.
+
+@item -shared
+@opindex shared
+Produce a shared object which can then be linked with other objects to
+form an executable.  Not all systems support this option.  For predictable
+results, you must also specify the same set of options that were used to
+generate code (@option{-fpic}, @option{-fPIC}, or model suboptions)
+when you specify this option.@footnote{On some systems, @samp{gcc -shared}
+needs to build supplementary stub code for constructors to work.  On
+multi-libbed systems, @samp{gcc -shared} must select the correct support
+libraries to link against.  Failing to supply the correct flags may lead
+to subtle defects.  Supplying them in cases where they are not necessary
+is innocuous.}
+
+@item -shared-libgcc
+@itemx -static-libgcc
+@opindex shared-libgcc
+@opindex static-libgcc
+On systems that provide @file{libgcc} as a shared library, these options
+force the use of either the shared or static version respectively.
+If no shared version of @file{libgcc} was built when the compiler was
+configured, these options have no effect.
+
+There are several situations in which an application should use the
+shared @file{libgcc} instead of the static version.  The most common
+of these is when the application wishes to throw and catch exceptions
+across different shared libraries.  In that case, each of the libraries
+as well as the application itself should use the shared @file{libgcc}.
+
+Therefore, the G++ and GCJ drivers automatically add
+@option{-shared-libgcc} whenever you build a shared library or a main
+executable, because C++ and Java programs typically use exceptions, so
+this is the right thing to do.
+
+If, instead, you use the GCC driver to create shared libraries, you may
+find that they will not always be linked with the shared @file{libgcc}.
+If GCC finds, at its configuration time, that you have a non-GNU linker
+or a GNU linker that does not support option @option{--eh-frame-hdr},
+it will link the shared version of @file{libgcc} into shared libraries
+by default.  Otherwise, it will take advantage of the linker and optimize
+away the linking with the shared version of @file{libgcc}, linking with
+the static version of libgcc by default.  This allows exceptions to
+propagate through such shared libraries, without incurring relocation
+costs at library load time.
+
+However, if a library or main executable is supposed to throw or catch
+exceptions, you must link it using the G++ or GCJ driver, as appropriate
+for the languages used in the program, or using the option
+@option{-shared-libgcc}, such that it is linked with the shared
+@file{libgcc}.
+
+@item -symbolic
+@opindex symbolic
+Bind references to global symbols when building a shared object.  Warn
+about any unresolved references (unless overridden by the link editor
+option @samp{-Xlinker -z -Xlinker defs}).  Only a few systems support
+this option.
+
+@item -T @var{script}
+@opindex T
+@cindex linker script
+Use @var{script} as the linker script.  This option is supported by most
+systems using the GNU linker.  On some targets, such as bare-board
+targets without an operating system, the @option{-T} option may be required 
+when linking to avoid references to undefined symbols.
+
+@item -Xlinker @var{option}
+@opindex Xlinker
+Pass @var{option} as an option to the linker.  You can use this to
+supply system-specific linker options which GCC does not know how to
+recognize.
+
+If you want to pass an option that takes a separate argument, you must use
+@option{-Xlinker} twice, once for the option and once for the argument.
+For example, to pass @option{-assert definitions}, you must write
+@samp{-Xlinker -assert -Xlinker definitions}.  It does not work to write
+@option{-Xlinker "-assert definitions"}, because this passes the entire
+string as a single argument, which is not what the linker expects.
+
+When using the GNU linker, it is usually more convenient to pass 
+arguments to linker options using the @option{@var{option}=@var{value}}
+syntax than as separate arguments.  For example, you can specify
+@samp{-Xlinker -Map=output.map} rather than
+@samp{-Xlinker -Map -Xlinker output.map}.  Other linkers may not support
+this syntax for command-line options.
+
+@item -Wl,@var{option}
+@opindex Wl
+Pass @var{option} as an option to the linker.  If @var{option} contains
+commas, it is split into multiple options at the commas.  You can use this
+syntax to pass an argument to the option.  
+For example, @samp{-Wl,-Map,output.map} passes @samp{-Map output.map} to the
+linker.  When using the GNU linker, you can also get the same effect with
+@samp{-Wl,-Map=output.map}.
+
+@item -u @var{symbol}
+@opindex u
+Pretend the symbol @var{symbol} is undefined, to force linking of
+library modules to define it.  You can use @option{-u} multiple times with
+different symbols to force loading of additional library modules.
+@end table
+
+@node Directory Options
+@section Options for Directory Search
+@cindex directory options
+@cindex options, directory search
+@cindex search path
+
+These options specify directories to search for header files, for
+libraries and for parts of the compiler:
+
+@table @gcctabopt
+@item -I@var{dir}
+@opindex I
+Add the directory @var{dir} to the head of the list of directories to be
+searched for header files.  This can be used to override a system header
+file, substituting your own version, since these directories are
+searched before the system header file directories.  However, you should
+not use this option to add directories that contain vendor-supplied
+system header files (use @option{-isystem} for that).  If you use more than
+one @option{-I} option, the directories are scanned in left-to-right
+order; the standard system directories come after.
+
+If a standard system include directory, or a directory specified with
+@option{-isystem}, is also specified with @option{-I}, the @option{-I}
+option will be ignored.  The directory will still be searched but as a
+system directory at its normal position in the system include chain.
+This is to ensure that GCC's procedure to fix buggy system headers and
+the ordering for the include_next directive are not inadvertently changed.
+If you really need to change the search order for system directories,
+use the @option{-nostdinc} and/or @option{-isystem} options.
+
+@item -iquote@var{dir}
+@opindex iquote
+Add the directory @var{dir} to the head of the list of directories to
+be searched for header files only for the case of @samp{#include
+"@var{file}"}; they are not searched for @samp{#include <@var{file}>},
+otherwise just like @option{-I}.
+
+@item -L@var{dir}
+@opindex L
+Add directory @var{dir} to the list of directories to be searched
+for @option{-l}.
+
+@item -B@var{prefix}
+@opindex B
+This option specifies where to find the executables, libraries,
+include files, and data files of the compiler itself.
+
+The compiler driver program runs one or more of the subprograms
+@file{cpp}, @file{cc1}, @file{as} and @file{ld}.  It tries
+@var{prefix} as a prefix for each program it tries to run, both with and
+without @samp{@var{machine}/@var{version}/} (@pxref{Target Options}).
+
+For each subprogram to be run, the compiler driver first tries the
+@option{-B} prefix, if any.  If that name is not found, or if @option{-B}
+was not specified, the driver tries two standard prefixes, which are
+@file{/usr/lib/gcc/} and @file{/usr/local/lib/gcc/}.  If neither of
+those results in a file name that is found, the unmodified program
+name is searched for using the directories specified in your
+@env{PATH} environment variable.
+
+The compiler will check to see if the path provided by the @option{-B}
+refers to a directory, and if necessary it will add a directory
+separator character at the end of the path.
+
+@option{-B} prefixes that effectively specify directory names also apply
+to libraries in the linker, because the compiler translates these
+options into @option{-L} options for the linker.  They also apply to
+includes files in the preprocessor, because the compiler translates these
+options into @option{-isystem} options for the preprocessor.  In this case,
+the compiler appends @samp{include} to the prefix.
+
+The run-time support file @file{libgcc.a} can also be searched for using
+the @option{-B} prefix, if needed.  If it is not found there, the two
+standard prefixes above are tried, and that is all.  The file is left
+out of the link if it is not found by those means.
+
+Another way to specify a prefix much like the @option{-B} prefix is to use
+the environment variable @env{GCC_EXEC_PREFIX}.  @xref{Environment
+Variables}.
+
+As a special kludge, if the path provided by @option{-B} is
+@file{[dir/]stage@var{N}/}, where @var{N} is a number in the range 0 to
+9, then it will be replaced by @file{[dir/]include}.  This is to help
+with boot-strapping the compiler.
+
+@item -specs=@var{file}
+@opindex specs
+Process @var{file} after the compiler reads in the standard @file{specs}
+file, in order to override the defaults that the @file{gcc} driver
+program uses when determining what switches to pass to @file{cc1},
+@file{cc1plus}, @file{as}, @file{ld}, etc.  More than one
+@option{-specs=@var{file}} can be specified on the command line, and they
+are processed in order, from left to right.
+
+@item --sysroot=@var{dir}
+@opindex sysroot
+Use @var{dir} as the logical root directory for headers and libraries.
+For example, if the compiler would normally search for headers in
+@file{/usr/include} and libraries in @file{/usr/lib}, it will instead
+search @file{@var{dir}/usr/include} and @file{@var{dir}/usr/lib}.
+
+If you use both this option and the @option{-isysroot} option, then
+the @option{--sysroot} option will apply to libraries, but the
+@option{-isysroot} option will apply to header files.
+
+The GNU linker (beginning with version 2.16) has the necessary support
+for this option.  If your linker does not support this option, the
+header file aspect of @option{--sysroot} will still work, but the
+library aspect will not.
+
+@item -I-
+@opindex I-
+This option has been deprecated.  Please use @option{-iquote} instead for
+@option{-I} directories before the @option{-I-} and remove the @option{-I-}.
+Any directories you specify with @option{-I} options before the @option{-I-}
+option are searched only for the case of @samp{#include "@var{file}"};
+they are not searched for @samp{#include <@var{file}>}.
+
+If additional directories are specified with @option{-I} options after
+the @option{-I-}, these directories are searched for all @samp{#include}
+directives.  (Ordinarily @emph{all} @option{-I} directories are used
+this way.)
+
+In addition, the @option{-I-} option inhibits the use of the current
+directory (where the current input file came from) as the first search
+directory for @samp{#include "@var{file}"}.  There is no way to
+override this effect of @option{-I-}.  With @option{-I.} you can specify
+searching the directory which was current when the compiler was
+invoked.  That is not exactly the same as what the preprocessor does
+by default, but it is often satisfactory.
+
+@option{-I-} does not inhibit the use of the standard system directories
+for header files.  Thus, @option{-I-} and @option{-nostdinc} are
+independent.
+@end table
+
+@c man end
+
+@node Spec Files
+@section Specifying subprocesses and the switches to pass to them
+@cindex Spec Files
+
+@command{gcc} is a driver program.  It performs its job by invoking a
+sequence of other programs to do the work of compiling, assembling and
+linking.  GCC interprets its command-line parameters and uses these to
+deduce which programs it should invoke, and which command-line options
+it ought to place on their command lines.  This behavior is controlled
+by @dfn{spec strings}.  In most cases there is one spec string for each
+program that GCC can invoke, but a few programs have multiple spec
+strings to control their behavior.  The spec strings built into GCC can
+be overridden by using the @option{-specs=} command-line switch to specify
+a spec file.
+
+@dfn{Spec files} are plaintext files that are used to construct spec
+strings.  They consist of a sequence of directives separated by blank
+lines.  The type of directive is determined by the first non-whitespace
+character on the line and it can be one of the following:
+
+@table @code
+@item %@var{command}
+Issues a @var{command} to the spec file processor.  The commands that can
+appear here are:
+
+@table @code
+@item %include <@var{file}>
+@cindex %include
+Search for @var{file} and insert its text at the current point in the
+specs file.
+
+@item %include_noerr <@var{file}>
+@cindex %include_noerr
+Just like @samp{%include}, but do not generate an error message if the include
+file cannot be found.
+
+@item %rename @var{old_name} @var{new_name}
+@cindex %rename
+Rename the spec string @var{old_name} to @var{new_name}.
+
+@end table
+
+@item *[@var{spec_name}]:
+This tells the compiler to create, override or delete the named spec
+string.  All lines after this directive up to the next directive or
+blank line are considered to be the text for the spec string.  If this
+results in an empty string then the spec will be deleted.  (Or, if the
+spec did not exist, then nothing will happened.)  Otherwise, if the spec
+does not currently exist a new spec will be created.  If the spec does
+exist then its contents will be overridden by the text of this
+directive, unless the first character of that text is the @samp{+}
+character, in which case the text will be appended to the spec.
+
+@item [@var{suffix}]:
+Creates a new @samp{[@var{suffix}] spec} pair.  All lines after this directive
+and up to the next directive or blank line are considered to make up the
+spec string for the indicated suffix.  When the compiler encounters an
+input file with the named suffix, it will processes the spec string in
+order to work out how to compile that file.  For example:
+
+@smallexample
+.ZZ:
+z-compile -input %i
+@end smallexample
+
+This says that any input file whose name ends in @samp{.ZZ} should be
+passed to the program @samp{z-compile}, which should be invoked with the
+command-line switch @option{-input} and with the result of performing the
+@samp{%i} substitution.  (See below.)
+
+As an alternative to providing a spec string, the text that follows a
+suffix directive can be one of the following:
+
+@table @code
+@item @@@var{language}
+This says that the suffix is an alias for a known @var{language}.  This is
+similar to using the @option{-x} command-line switch to GCC to specify a
+language explicitly.  For example:
+
+@smallexample
+.ZZ:
+@@c++
+@end smallexample
+
+Says that .ZZ files are, in fact, C++ source files.
+
+@item #@var{name}
+This causes an error messages saying:
+
+@smallexample
+@var{name} compiler not installed on this system.
+@end smallexample
+@end table
+
+GCC already has an extensive list of suffixes built into it.
+This directive will add an entry to the end of the list of suffixes, but
+since the list is searched from the end backwards, it is effectively
+possible to override earlier entries using this technique.
+
+@end table
+
+GCC has the following spec strings built into it.  Spec files can
+override these strings or create their own.  Note that individual
+targets can also add their own spec strings to this list.
+
+@smallexample
+asm          Options to pass to the assembler
+asm_final    Options to pass to the assembler post-processor
+cpp          Options to pass to the C preprocessor
+cc1          Options to pass to the C compiler
+cc1plus      Options to pass to the C++ compiler
+endfile      Object files to include at the end of the link
+link         Options to pass to the linker
+lib          Libraries to include on the command line to the linker
+libgcc       Decides which GCC support library to pass to the linker
+linker       Sets the name of the linker
+predefines   Defines to be passed to the C preprocessor
+signed_char  Defines to pass to CPP to say whether @code{char} is signed
+             by default
+startfile    Object files to include at the start of the link
+@end smallexample
+
+Here is a small example of a spec file:
+
+@smallexample
+%rename lib                 old_lib
+
+*lib:
+--start-group -lgcc -lc -leval1 --end-group %(old_lib)
+@end smallexample
+
+This example renames the spec called @samp{lib} to @samp{old_lib} and
+then overrides the previous definition of @samp{lib} with a new one.
+The new definition adds in some extra command-line options before
+including the text of the old definition.
+
+@dfn{Spec strings} are a list of command-line options to be passed to their
+corresponding program.  In addition, the spec strings can contain
+@samp{%}-prefixed sequences to substitute variable text or to
+conditionally insert text into the command line.  Using these constructs
+it is possible to generate quite complex command lines.
+
+Here is a table of all defined @samp{%}-sequences for spec
+strings.  Note that spaces are not generated automatically around the
+results of expanding these sequences.  Therefore you can concatenate them
+together or combine them with constant text in a single argument.
+
+@table @code
+@item %%
+Substitute one @samp{%} into the program name or argument.
+
+@item %i
+Substitute the name of the input file being processed.
+
+@item %b
+Substitute the basename of the input file being processed.
+This is the substring up to (and not including) the last period
+and not including the directory.
+
+@item %B
+This is the same as @samp{%b}, but include the file suffix (text after
+the last period).
+
+@item %d
+Marks the argument containing or following the @samp{%d} as a
+temporary file name, so that that file will be deleted if GCC exits
+successfully.  Unlike @samp{%g}, this contributes no text to the
+argument.
+
+@item %g@var{suffix}
+Substitute a file name that has suffix @var{suffix} and is chosen
+once per compilation, and mark the argument in the same way as
+@samp{%d}.  To reduce exposure to denial-of-service attacks, the file
+name is now chosen in a way that is hard to predict even when previously
+chosen file names are known.  For example, @samp{%g.s @dots{} %g.o @dots{} %g.s}
+might turn into @samp{ccUVUUAU.s ccXYAXZ12.o ccUVUUAU.s}.  @var{suffix} matches
+the regexp @samp{[.A-Za-z]*} or the special string @samp{%O}, which is
+treated exactly as if @samp{%O} had been preprocessed.  Previously, @samp{%g}
+was simply substituted with a file name chosen once per compilation,
+without regard to any appended suffix (which was therefore treated
+just like ordinary text), making such attacks more likely to succeed.
+
+@item %u@var{suffix}
+Like @samp{%g}, but generates a new temporary file name even if
+@samp{%u@var{suffix}} was already seen.
+
+@item %U@var{suffix}
+Substitutes the last file name generated with @samp{%u@var{suffix}}, generating a
+new one if there is no such last file name.  In the absence of any
+@samp{%u@var{suffix}}, this is just like @samp{%g@var{suffix}}, except they don't share
+the same suffix @emph{space}, so @samp{%g.s @dots{} %U.s @dots{} %g.s @dots{} %U.s}
+would involve the generation of two distinct file names, one
+for each @samp{%g.s} and another for each @samp{%U.s}.  Previously, @samp{%U} was
+simply substituted with a file name chosen for the previous @samp{%u},
+without regard to any appended suffix.
+
+@item %j@var{suffix}
+Substitutes the name of the @code{HOST_BIT_BUCKET}, if any, and if it is
+writable, and if save-temps is off; otherwise, substitute the name
+of a temporary file, just like @samp{%u}.  This temporary file is not
+meant for communication between processes, but rather as a junk
+disposal mechanism.
+
+@item %|@var{suffix}
+@itemx %m@var{suffix}
+Like @samp{%g}, except if @option{-pipe} is in effect.  In that case
+@samp{%|} substitutes a single dash and @samp{%m} substitutes nothing at
+all.  These are the two most common ways to instruct a program that it
+should read from standard input or write to standard output.  If you
+need something more elaborate you can use an @samp{%@{pipe:@code{X}@}}
+construct: see for example @file{f/lang-specs.h}.
+
+@item %.@var{SUFFIX}
+Substitutes @var{.SUFFIX} for the suffixes of a matched switch's args
+when it is subsequently output with @samp{%*}.  @var{SUFFIX} is
+terminated by the next space or %.
+
+@item %w
+Marks the argument containing or following the @samp{%w} as the
+designated output file of this compilation.  This puts the argument
+into the sequence of arguments that @samp{%o} will substitute later.
+
+@item %o
+Substitutes the names of all the output files, with spaces
+automatically placed around them.  You should write spaces
+around the @samp{%o} as well or the results are undefined.
+@samp{%o} is for use in the specs for running the linker.
+Input files whose names have no recognized suffix are not compiled
+at all, but they are included among the output files, so they will
+be linked.
+
+@item %O
+Substitutes the suffix for object files.  Note that this is
+handled specially when it immediately follows @samp{%g, %u, or %U},
+because of the need for those to form complete file names.  The
+handling is such that @samp{%O} is treated exactly as if it had already
+been substituted, except that @samp{%g, %u, and %U} do not currently
+support additional @var{suffix} characters following @samp{%O} as they would
+following, for example, @samp{.o}.
+
+@item %p
+Substitutes the standard macro predefinitions for the
+current target machine.  Use this when running @code{cpp}.
+
+@item %P
+Like @samp{%p}, but puts @samp{__} before and after the name of each
+predefined macro, except for macros that start with @samp{__} or with
+@samp{_@var{L}}, where @var{L} is an uppercase letter.  This is for ISO
+C@.
+
+@item %I
+Substitute any of @option{-iprefix} (made from @env{GCC_EXEC_PREFIX}),
+@option{-isysroot} (made from @env{TARGET_SYSTEM_ROOT}),
+@option{-isystem} (made from @env{COMPILER_PATH} and @option{-B} options)
+and @option{-imultilib} as necessary.
+
+@item %s
+Current argument is the name of a library or startup file of some sort.
+Search for that file in a standard list of directories and substitute
+the full name found.
+
+@item %e@var{str}
+Print @var{str} as an error message.  @var{str} is terminated by a newline.
+Use this when inconsistent options are detected.
+
+@item %(@var{name})
+Substitute the contents of spec string @var{name} at this point.
+
+@item %[@var{name}]
+Like @samp{%(@dots{})} but put @samp{__} around @option{-D} arguments.
+
+@item %x@{@var{option}@}
+Accumulate an option for @samp{%X}.
+
+@item %X
+Output the accumulated linker options specified by @option{-Wl} or a @samp{%x}
+spec string.
+
+@item %Y
+Output the accumulated assembler options specified by @option{-Wa}.
+
+@item %Z
+Output the accumulated preprocessor options specified by @option{-Wp}.
+
+@item %a
+Process the @code{asm} spec.  This is used to compute the
+switches to be passed to the assembler.
+
+@item %A
+Process the @code{asm_final} spec.  This is a spec string for
+passing switches to an assembler post-processor, if such a program is
+needed.
+
+@item %l
+Process the @code{link} spec.  This is the spec for computing the
+command line passed to the linker.  Typically it will make use of the
+@samp{%L %G %S %D and %E} sequences.
+
+@item %D
+Dump out a @option{-L} option for each directory that GCC believes might
+contain startup files.  If the target supports multilibs then the
+current multilib directory will be prepended to each of these paths.
+
+@item %L
+Process the @code{lib} spec.  This is a spec string for deciding which
+libraries should be included on the command line to the linker.
+
+@item %G
+Process the @code{libgcc} spec.  This is a spec string for deciding
+which GCC support library should be included on the command line to the linker.
+
+@item %S
+Process the @code{startfile} spec.  This is a spec for deciding which
+object files should be the first ones passed to the linker.  Typically
+this might be a file named @file{crt0.o}.
+
+@item %E
+Process the @code{endfile} spec.  This is a spec string that specifies
+the last object files that will be passed to the linker.
+
+@item %C
+Process the @code{cpp} spec.  This is used to construct the arguments
+to be passed to the C preprocessor.
+
+@item %1
+Process the @code{cc1} spec.  This is used to construct the options to be
+passed to the actual C compiler (@samp{cc1}).
+
+@item %2
+Process the @code{cc1plus} spec.  This is used to construct the options to be
+passed to the actual C++ compiler (@samp{cc1plus}).
+
+@item %*
+Substitute the variable part of a matched option.  See below.
+Note that each comma in the substituted string is replaced by
+a single space.
+
+@item %<@code{S}
+Remove all occurrences of @code{-S} from the command line.  Note---this
+command is position dependent.  @samp{%} commands in the spec string
+before this one will see @code{-S}, @samp{%} commands in the spec string
+after this one will not.
+
+@item %:@var{function}(@var{args})
+Call the named function @var{function}, passing it @var{args}.
+@var{args} is first processed as a nested spec string, then split
+into an argument vector in the usual fashion.  The function returns
+a string which is processed as if it had appeared literally as part
+of the current spec.
+
+The following built-in spec functions are provided:
+
+@table @code
+@item @code{getenv}
+The @code{getenv} spec function takes two arguments: an environment
+variable name and a string.  If the environment variable is not
+defined, a fatal error is issued.  Otherwise, the return value is the
+value of the environment variable concatenated with the string.  For
+example, if @env{TOPDIR} is defined as @file{/path/to/top}, then:
+
+@smallexample
+%:getenv(TOPDIR /include)
+@end smallexample
+
+expands to @file{/path/to/top/include}.
+
+@item @code{if-exists}
+The @code{if-exists} spec function takes one argument, an absolute
+pathname to a file.  If the file exists, @code{if-exists} returns the
+pathname.  Here is a small example of its usage:
+
+@smallexample
+*startfile:
+crt0%O%s %:if-exists(crti%O%s) crtbegin%O%s
+@end smallexample
+
+@item @code{if-exists-else}
+The @code{if-exists-else} spec function is similar to the @code{if-exists}
+spec function, except that it takes two arguments.  The first argument is
+an absolute pathname to a file.  If the file exists, @code{if-exists-else}
+returns the pathname.  If it does not exist, it returns the second argument.
+This way, @code{if-exists-else} can be used to select one file or another,
+based on the existence of the first.  Here is a small example of its usage:
+
+@smallexample
+*startfile:
+crt0%O%s %:if-exists(crti%O%s) \
+%:if-exists-else(crtbeginT%O%s crtbegin%O%s)
+@end smallexample
+
+@item @code{replace-outfile}
+The @code{replace-outfile} spec function takes two arguments.  It looks for the
+first argument in the outfiles array and replaces it with the second argument.  Here
+is a small example of its usage:
+
+@smallexample
+%@{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)@}
+@end smallexample
+
+@item @code{print-asm-header}
+The @code{print-asm-header} function takes no arguments and simply
+prints a banner like:
+
+@smallexample
+Assembler options
+=================
+
+Use "-Wa,OPTION" to pass "OPTION" to the assembler.
+@end smallexample
+
+It is used to separate compiler options from assembler options
+in the @option{--target-help} output.
+@end table
+
+@item %@{@code{S}@}
+Substitutes the @code{-S} switch, if that switch was given to GCC@.
+If that switch was not specified, this substitutes nothing.  Note that
+the leading dash is omitted when specifying this option, and it is
+automatically inserted if the substitution is performed.  Thus the spec
+string @samp{%@{foo@}} would match the command-line option @option{-foo}
+and would output the command line option @option{-foo}.
+
+@item %W@{@code{S}@}
+Like %@{@code{S}@} but mark last argument supplied within as a file to be
+deleted on failure.
+
+@item %@{@code{S}*@}
+Substitutes all the switches specified to GCC whose names start
+with @code{-S}, but which also take an argument.  This is used for
+switches like @option{-o}, @option{-D}, @option{-I}, etc.
+GCC considers @option{-o foo} as being
+one switch whose names starts with @samp{o}.  %@{o*@} would substitute this
+text, including the space.  Thus two arguments would be generated.
+
+@item %@{@code{S}*&@code{T}*@}
+Like %@{@code{S}*@}, but preserve order of @code{S} and @code{T} options
+(the order of @code{S} and @code{T} in the spec is not significant).
+There can be any number of ampersand-separated variables; for each the
+wild card is optional.  Useful for CPP as @samp{%@{D*&U*&A*@}}.
+
+@item %@{@code{S}:@code{X}@}
+Substitutes @code{X}, if the @samp{-S} switch was given to GCC@.
+
+@item %@{!@code{S}:@code{X}@}
+Substitutes @code{X}, if the @samp{-S} switch was @emph{not} given to GCC@.
+
+@item %@{@code{S}*:@code{X}@}
+Substitutes @code{X} if one or more switches whose names start with
+@code{-S} are specified to GCC@.  Normally @code{X} is substituted only
+once, no matter how many such switches appeared.  However, if @code{%*}
+appears somewhere in @code{X}, then @code{X} will be substituted once
+for each matching switch, with the @code{%*} replaced by the part of
+that switch that matched the @code{*}.
+
+@item %@{.@code{S}:@code{X}@}
+Substitutes @code{X}, if processing a file with suffix @code{S}.
+
+@item %@{!.@code{S}:@code{X}@}
+Substitutes @code{X}, if @emph{not} processing a file with suffix @code{S}.
+
+@item %@{,@code{S}:@code{X}@}
+Substitutes @code{X}, if processing a file for language @code{S}.
+
+@item %@{!,@code{S}:@code{X}@}
+Substitutes @code{X}, if not processing a file for language @code{S}.
+
+@item %@{@code{S}|@code{P}:@code{X}@}
+Substitutes @code{X} if either @code{-S} or @code{-P} was given to
+GCC@.  This may be combined with @samp{!}, @samp{.}, @samp{,}, and
+@code{*} sequences as well, although they have a stronger binding than
+the @samp{|}.  If @code{%*} appears in @code{X}, all of the
+alternatives must be starred, and only the first matching alternative
+is substituted.
+
+For example, a spec string like this:
+
+@smallexample
+%@{.c:-foo@} %@{!.c:-bar@} %@{.c|d:-baz@} %@{!.c|d:-boggle@}
+@end smallexample
+
+will output the following command-line options from the following input
+command-line options:
+
+@smallexample
+fred.c        -foo -baz
+jim.d         -bar -boggle
+-d fred.c     -foo -baz -boggle
+-d jim.d      -bar -baz -boggle
+@end smallexample
+
+@item %@{S:X; T:Y; :D@}
+
+If @code{S} was given to GCC, substitutes @code{X}; else if @code{T} was
+given to GCC, substitutes @code{Y}; else substitutes @code{D}.  There can
+be as many clauses as you need.  This may be combined with @code{.},
+@code{,}, @code{!}, @code{|}, and @code{*} as needed.
+
+
+@end table
+
+The conditional text @code{X} in a %@{@code{S}:@code{X}@} or similar
+construct may contain other nested @samp{%} constructs or spaces, or
+even newlines.  They are processed as usual, as described above.
+Trailing white space in @code{X} is ignored.  White space may also
+appear anywhere on the left side of the colon in these constructs,
+except between @code{.} or @code{*} and the corresponding word.
+
+The @option{-O}, @option{-f}, @option{-m}, and @option{-W} switches are
+handled specifically in these constructs.  If another value of
+@option{-O} or the negated form of a @option{-f}, @option{-m}, or
+@option{-W} switch is found later in the command line, the earlier
+switch value is ignored, except with @{@code{S}*@} where @code{S} is
+just one letter, which passes all matching options.
+
+The character @samp{|} at the beginning of the predicate text is used to
+indicate that a command should be piped to the following command, but
+only if @option{-pipe} is specified.
+
+It is built into GCC which switches take arguments and which do not.
+(You might think it would be useful to generalize this to allow each
+compiler's spec to say which switches take arguments.  But this cannot
+be done in a consistent fashion.  GCC cannot even decide which input
+files have been specified without knowing which switches take arguments,
+and it must know which input files to compile in order to tell which
+compilers to run).
+
+GCC also knows implicitly that arguments starting in @option{-l} are to be
+treated as compiler output files, and passed to the linker in their
+proper position among the other output files.
+
+@c man begin OPTIONS
+
+@node Target Options
+@section Specifying Target Machine and Compiler Version
+@cindex target options
+@cindex cross compiling
+@cindex specifying machine version
+@cindex specifying compiler version and target machine
+@cindex compiler version, specifying
+@cindex target machine, specifying
+
+The usual way to run GCC is to run the executable called @file{gcc}, or
+@file{<machine>-gcc} when cross-compiling, or
+@file{<machine>-gcc-<version>} to run a version other than the one that
+was installed last.  Sometimes this is inconvenient, so GCC provides
+options that will switch to another cross-compiler or version.
+
+@table @gcctabopt
+@item -b @var{machine}
+@opindex b
+The argument @var{machine} specifies the target machine for compilation.
+
+The value to use for @var{machine} is the same as was specified as the
+machine type when configuring GCC as a cross-compiler.  For
+example, if a cross-compiler was configured with @samp{configure
+arm-elf}, meaning to compile for an arm processor with elf binaries,
+then you would specify @option{-b arm-elf} to run that cross compiler.
+Because there are other options beginning with @option{-b}, the
+configuration must contain a hyphen, or @option{-b} alone should be one
+argument followed by the configuration in the next argument.
+
+@item -V @var{version}
+@opindex V
+The argument @var{version} specifies which version of GCC to run.
+This is useful when multiple versions are installed.  For example,
+@var{version} might be @samp{4.0}, meaning to run GCC version 4.0.
+@end table
+
+The @option{-V} and @option{-b} options work by running the
+@file{<machine>-gcc-<version>} executable, so there's no real reason to
+use them if you can just run that directly.
+
+@node Submodel Options
+@section Hardware Models and Configurations
+@cindex submodel options
+@cindex specifying hardware config
+@cindex hardware models and configurations, specifying
+@cindex machine dependent options
+
+Earlier we discussed the standard option @option{-b} which chooses among
+different installed compilers for completely different target
+machines, such as VAX vs.@: 68000 vs.@: 80386.
+
+In addition, each of these target machine types can have its own
+special options, starting with @samp{-m}, to choose among various
+hardware models or configurations---for example, 68010 vs 68020,
+floating coprocessor or none.  A single installed version of the
+compiler can compile for any model or configuration, according to the
+options specified.
+
+Some configurations of the compiler also support additional special
+options, usually for compatibility with other compilers on the same
+platform.
+
+@c This list is ordered alphanumerically by subsection name.
+@c It should be the same order and spelling as these options are listed
+@c in Machine Dependent Options
+
+@menu
+* ARC Options::
+* ARM Options::
+* AVR Options::
+* Blackfin Options::
+* CRIS Options::
+* CRX Options::
+* Darwin Options::
+* DEC Alpha Options::
+* DEC Alpha/VMS Options::
+* FR30 Options::
+* FRV Options::
+* GNU/Linux Options::
+* H8/300 Options::
+* HPPA Options::
+* i386 and x86-64 Options::
+* i386 and x86-64 Windows Options::
+* IA-64 Options::
+* M32C Options::
+* M32R/D Options::
+* M680x0 Options::
+* M68hc1x Options::
+* MCore Options::
+* MIPS Options::
+* MMIX Options::
+* MN10300 Options::
+* PDP-11 Options::
+* picoChip Options::
+* PowerPC Options::
+* RS/6000 and PowerPC Options::
+* S/390 and zSeries Options::
+* Score Options::
+* SH Options::
+* SPARC Options::
+* SPU Options::
+* System V Options::
+* V850 Options::
+* VAX Options::
+* VxWorks Options::
+* x86-64 Options::
+* Xstormy16 Options::
+* Xtensa Options::
+* zSeries Options::
+@end menu
+
+@node ARC Options
+@subsection ARC Options
+@cindex ARC Options
+
+These options are defined for ARC implementations:
+
+@table @gcctabopt
+@item -EL
+@opindex EL
+Compile code for little endian mode.  This is the default.
+
+@item -EB
+@opindex EB
+Compile code for big endian mode.
+
+@item -mmangle-cpu
+@opindex mmangle-cpu
+Prepend the name of the cpu to all public symbol names.
+In multiple-processor systems, there are many ARC variants with different
+instruction and register set characteristics.  This flag prevents code
+compiled for one cpu to be linked with code compiled for another.
+No facility exists for handling variants that are ``almost identical''.
+This is an all or nothing option.
+
+@item -mcpu=@var{cpu}
+@opindex mcpu
+Compile code for ARC variant @var{cpu}.
+Which variants are supported depend on the configuration.
+All variants support @option{-mcpu=base}, this is the default.
+
+@item -mtext=@var{text-section}
+@itemx -mdata=@var{data-section}
+@itemx -mrodata=@var{readonly-data-section}
+@opindex mtext
+@opindex mdata
+@opindex mrodata
+Put functions, data, and readonly data in @var{text-section},
+@var{data-section}, and @var{readonly-data-section} respectively
+by default.  This can be overridden with the @code{section} attribute.
+@xref{Variable Attributes}.
+
+@item -mfix-cortex-m3-ldrd
+@opindex mfix-cortex-m3-ldrd
+Some Cortex-M3 cores can cause data corruption when @code{ldrd} instructions
+with overlapping destination and base registers are used.  This option avoids
+generating these instructions.  This option is enabled by default when
+@option{-mcpu=cortex-m3} is specified.
+
+@end table
+
+@node ARM Options
+@subsection ARM Options
+@cindex ARM options
+
+These @samp{-m} options are defined for Advanced RISC Machines (ARM)
+architectures:
+
+@table @gcctabopt
+@item -mabi=@var{name}
+@opindex mabi
+Generate code for the specified ABI@.  Permissible values are: @samp{apcs-gnu},
+@samp{atpcs}, @samp{aapcs}, @samp{aapcs-linux} and @samp{iwmmxt}.
+
+@item -mapcs-frame
+@opindex mapcs-frame
+Generate a stack frame that is compliant with the ARM Procedure Call
+Standard for all functions, even if this is not strictly necessary for
+correct execution of the code.  Specifying @option{-fomit-frame-pointer}
+with this option will cause the stack frames not to be generated for
+leaf functions.  The default is @option{-mno-apcs-frame}.
+
+@item -mapcs
+@opindex mapcs
+This is a synonym for @option{-mapcs-frame}.
+
+@ignore
+@c not currently implemented
+@item -mapcs-stack-check
+@opindex mapcs-stack-check
+Generate code to check the amount of stack space available upon entry to
+every function (that actually uses some stack space).  If there is
+insufficient space available then either the function
+@samp{__rt_stkovf_split_small} or @samp{__rt_stkovf_split_big} will be
+called, depending upon the amount of stack space required.  The run time
+system is required to provide these functions.  The default is
+@option{-mno-apcs-stack-check}, since this produces smaller code.
+
+@c not currently implemented
+@item -mapcs-float
+@opindex mapcs-float
+Pass floating point arguments using the float point registers.  This is
+one of the variants of the APCS@.  This option is recommended if the
+target hardware has a floating point unit or if a lot of floating point
+arithmetic is going to be performed by the code.  The default is
+@option{-mno-apcs-float}, since integer only code is slightly increased in
+size if @option{-mapcs-float} is used.
+
+@c not currently implemented
+@item -mapcs-reentrant
+@opindex mapcs-reentrant
+Generate reentrant, position independent code.  The default is
+@option{-mno-apcs-reentrant}.
+@end ignore
+
+@item -mthumb-interwork
+@opindex mthumb-interwork
+Generate code which supports calling between the ARM and Thumb
+instruction sets.  Without this option the two instruction sets cannot
+be reliably used inside one program.  The default is
+@option{-mno-thumb-interwork}, since slightly larger code is generated
+when @option{-mthumb-interwork} is specified.
+
+@item -mno-sched-prolog
+@opindex mno-sched-prolog
+Prevent the reordering of instructions in the function prolog, or the
+merging of those instruction with the instructions in the function's
+body.  This means that all functions will start with a recognizable set
+of instructions (or in fact one of a choice from a small set of
+different function prologues), and this information can be used to
+locate the start if functions inside an executable piece of code.  The
+default is @option{-msched-prolog}.
+
+@item -mfloat-abi=@var{name}
+@opindex mfloat-abi
+Specifies which floating-point ABI to use.  Permissible values
+are: @samp{soft}, @samp{softfp} and @samp{hard}.
+
+Specifying @samp{soft} causes GCC to generate output containing 
+library calls for floating-point operations.
+@samp{softfp} allows the generation of code using hardware floating-point 
+instructions, but still uses the soft-float calling conventions.  
+@samp{hard} allows generation of floating-point instructions 
+and uses FPU-specific calling conventions.
+
+Using @option{-mfloat-abi=hard} with VFP coprocessors is not supported.
+Use @option{-mfloat-abi=softfp} with the appropriate @option{-mfpu} option
+to allow the compiler to generate code that makes use of the hardware
+floating-point capabilities for these CPUs.
+
+The default depends on the specific target configuration.  Note that
+the hard-float and soft-float ABIs are not link-compatible; you must
+compile your entire program with the same ABI, and link with a
+compatible set of libraries.
+
+@item -mhard-float
+@opindex mhard-float
+Equivalent to @option{-mfloat-abi=hard}.
+
+@item -msoft-float
+@opindex msoft-float
+Equivalent to @option{-mfloat-abi=soft}.
+
+@item -mlittle-endian
+@opindex mlittle-endian
+Generate code for a processor running in little-endian mode.  This is
+the default for all standard configurations.
+
+@item -mbig-endian
+@opindex mbig-endian
+Generate code for a processor running in big-endian mode; the default is
+to compile code for a little-endian processor.
+
+@item -mwords-little-endian
+@opindex mwords-little-endian
+This option only applies when generating code for big-endian processors.
+Generate code for a little-endian word order but a big-endian byte
+order.  That is, a byte order of the form @samp{32107654}.  Note: this
+option should only be used if you require compatibility with code for
+big-endian ARM processors generated by versions of the compiler prior to
+2.8.
+
+@item -mcpu=@var{name}
+@opindex mcpu
+This specifies the name of the target ARM processor.  GCC uses this name
+to determine what kind of instructions it can emit when generating
+assembly code.  Permissible names are: @samp{arm2}, @samp{arm250},
+@samp{arm3}, @samp{arm6}, @samp{arm60}, @samp{arm600}, @samp{arm610},
+@samp{arm620}, @samp{arm7}, @samp{arm7m}, @samp{arm7d}, @samp{arm7dm},
+@samp{arm7di}, @samp{arm7dmi}, @samp{arm70}, @samp{arm700},
+@samp{arm700i}, @samp{arm710}, @samp{arm710c}, @samp{arm7100},
+@samp{arm720},
+@samp{arm7500}, @samp{arm7500fe}, @samp{arm7tdmi}, @samp{arm7tdmi-s},
+@samp{arm710t}, @samp{arm720t}, @samp{arm740t},
+@samp{strongarm}, @samp{strongarm110}, @samp{strongarm1100},
+@samp{strongarm1110},
+@samp{arm8}, @samp{arm810}, @samp{arm9}, @samp{arm9e}, @samp{arm920},
+@samp{arm920t}, @samp{arm922t}, @samp{arm946e-s}, @samp{arm966e-s},
+@samp{arm968e-s}, @samp{arm926ej-s}, @samp{arm940t}, @samp{arm9tdmi},
+@samp{arm10tdmi}, @samp{arm1020t}, @samp{arm1026ej-s},
+@samp{arm10e}, @samp{arm1020e}, @samp{arm1022e},
+@samp{arm1136j-s}, @samp{arm1136jf-s}, @samp{mpcore}, @samp{mpcorenovfp},
+@samp{arm1156t2-s}, @samp{arm1176jz-s}, @samp{arm1176jzf-s},
+@samp{cortex-a8}, @samp{cortex-a9},
+@samp{cortex-r4}, @samp{cortex-r4f}, @samp{cortex-m3},
+@samp{cortex-m1},
+@samp{xscale}, @samp{iwmmxt}, @samp{iwmmxt2}, @samp{ep9312}.
+
+@item -mtune=@var{name}
+@opindex mtune
+This option is very similar to the @option{-mcpu=} option, except that
+instead of specifying the actual target processor type, and hence
+restricting which instructions can be used, it specifies that GCC should
+tune the performance of the code as if the target were of the type
+specified in this option, but still choosing the instructions that it
+will generate based on the cpu specified by a @option{-mcpu=} option.
+For some ARM implementations better performance can be obtained by using
+this option.
+
+@item -march=@var{name}
+@opindex march
+This specifies the name of the target ARM architecture.  GCC uses this
+name to determine what kind of instructions it can emit when generating
+assembly code.  This option can be used in conjunction with or instead
+of the @option{-mcpu=} option.  Permissible names are: @samp{armv2},
+@samp{armv2a}, @samp{armv3}, @samp{armv3m}, @samp{armv4}, @samp{armv4t},
+@samp{armv5}, @samp{armv5t}, @samp{armv5e}, @samp{armv5te},
+@samp{armv6}, @samp{armv6j},
+@samp{armv6t2}, @samp{armv6z}, @samp{armv6zk}, @samp{armv6-m},
+@samp{armv7}, @samp{armv7-a}, @samp{armv7-r}, @samp{armv7-m},
+@samp{iwmmxt}, @samp{iwmmxt2}, @samp{ep9312}.
+
+@item -mfpu=@var{name}
+@itemx -mfpe=@var{number}
+@itemx -mfp=@var{number}
+@opindex mfpu
+@opindex mfpe
+@opindex mfp
+This specifies what floating point hardware (or hardware emulation) is
+available on the target.  Permissible names are: @samp{fpa}, @samp{fpe2},
+@samp{fpe3}, @samp{maverick}, @samp{vfp}, @samp{vfpv3}, @samp{vfpv3-d16} and
+@samp{neon}.  @option{-mfp} and @option{-mfpe}
+are synonyms for @option{-mfpu}=@samp{fpe}@var{number}, for compatibility
+with older versions of GCC@.
+
+If @option{-msoft-float} is specified this specifies the format of
+floating point values.
+
+@item -mstructure-size-boundary=@var{n}
+@opindex mstructure-size-boundary
+The size of all structures and unions will be rounded up to a multiple
+of the number of bits set by this option.  Permissible values are 8, 32
+and 64.  The default value varies for different toolchains.  For the COFF
+targeted toolchain the default value is 8.  A value of 64 is only allowed
+if the underlying ABI supports it.
+
+Specifying the larger number can produce faster, more efficient code, but
+can also increase the size of the program.  Different values are potentially
+incompatible.  Code compiled with one value cannot necessarily expect to
+work with code or libraries compiled with another value, if they exchange
+information using structures or unions.
+
+@item -mabort-on-noreturn
+@opindex mabort-on-noreturn
+Generate a call to the function @code{abort} at the end of a
+@code{noreturn} function.  It will be executed if the function tries to
+return.
+
+@item -mlong-calls
+@itemx -mno-long-calls
+@opindex mlong-calls
+@opindex mno-long-calls
+Tells the compiler to perform function calls by first loading the
+address of the function into a register and then performing a subroutine
+call on this register.  This switch is needed if the target function
+will lie outside of the 64 megabyte addressing range of the offset based
+version of subroutine call instruction.
+
+Even if this switch is enabled, not all function calls will be turned
+into long calls.  The heuristic is that static functions, functions
+which have the @samp{short-call} attribute, functions that are inside
+the scope of a @samp{#pragma no_long_calls} directive and functions whose
+definitions have already been compiled within the current compilation
+unit, will not be turned into long calls.  The exception to this rule is
+that weak function definitions, functions with the @samp{long-call}
+attribute or the @samp{section} attribute, and functions that are within
+the scope of a @samp{#pragma long_calls} directive, will always be
+turned into long calls.
+
+This feature is not enabled by default.  Specifying
+@option{-mno-long-calls} will restore the default behavior, as will
+placing the function calls within the scope of a @samp{#pragma
+long_calls_off} directive.  Note these switches have no effect on how
+the compiler generates code to handle function calls via function
+pointers.
+
+@item -msingle-pic-base
+@opindex msingle-pic-base
+Treat the register used for PIC addressing as read-only, rather than
+loading it in the prologue for each function.  The run-time system is
+responsible for initializing this register with an appropriate value
+before execution begins.
+
+@item -mpic-register=@var{reg}
+@opindex mpic-register
+Specify the register to be used for PIC addressing.  The default is R10
+unless stack-checking is enabled, when R9 is used.
+
+@item -mcirrus-fix-invalid-insns
+@opindex mcirrus-fix-invalid-insns
+@opindex mno-cirrus-fix-invalid-insns
+Insert NOPs into the instruction stream to in order to work around
+problems with invalid Maverick instruction combinations.  This option
+is only valid if the @option{-mcpu=ep9312} option has been used to
+enable generation of instructions for the Cirrus Maverick floating
+point co-processor.  This option is not enabled by default, since the
+problem is only present in older Maverick implementations.  The default
+can be re-enabled by use of the @option{-mno-cirrus-fix-invalid-insns}
+switch.
+
+@item -mpoke-function-name
+@opindex mpoke-function-name
+Write the name of each function into the text section, directly
+preceding the function prologue.  The generated code is similar to this:
+
+@smallexample
+     t0
+         .ascii "arm_poke_function_name", 0
+         .align
+     t1
+         .word 0xff000000 + (t1 - t0)
+     arm_poke_function_name
+         mov     ip, sp
+         stmfd   sp!, @{fp, ip, lr, pc@}
+         sub     fp, ip, #4
+@end smallexample
+
+When performing a stack backtrace, code can inspect the value of
+@code{pc} stored at @code{fp + 0}.  If the trace function then looks at
+location @code{pc - 12} and the top 8 bits are set, then we know that
+there is a function name embedded immediately preceding this location
+and has length @code{((pc[-3]) & 0xff000000)}.
+
+@item -mthumb
+@opindex mthumb
+Generate code for the Thumb instruction set.  The default is to
+use the 32-bit ARM instruction set.
+This option automatically enables either 16-bit Thumb-1 or
+mixed 16/32-bit Thumb-2 instructions based on the @option{-mcpu=@var{name}}
+and @option{-march=@var{name}} options.
+
+@item -mtpcs-frame
+@opindex mtpcs-frame
+Generate a stack frame that is compliant with the Thumb Procedure Call
+Standard for all non-leaf functions.  (A leaf function is one that does
+not call any other functions.)  The default is @option{-mno-tpcs-frame}.
+
+@item -mtpcs-leaf-frame
+@opindex mtpcs-leaf-frame
+Generate a stack frame that is compliant with the Thumb Procedure Call
+Standard for all leaf functions.  (A leaf function is one that does
+not call any other functions.)  The default is @option{-mno-apcs-leaf-frame}.
+
+@item -mcallee-super-interworking
+@opindex mcallee-super-interworking
+Gives all externally visible functions in the file being compiled an ARM
+instruction set header which switches to Thumb mode before executing the
+rest of the function.  This allows these functions to be called from
+non-interworking code.
+
+@item -mcaller-super-interworking
+@opindex mcaller-super-interworking
+Allows calls via function pointers (including virtual functions) to
+execute correctly regardless of whether the target code has been
+compiled for interworking or not.  There is a small overhead in the cost
+of executing a function pointer if this option is enabled.
+
+@item -mtp=@var{name}
+@opindex mtp
+Specify the access model for the thread local storage pointer.  The valid
+models are @option{soft}, which generates calls to @code{__aeabi_read_tp},
+@option{cp15}, which fetches the thread pointer from @code{cp15} directly
+(supported in the arm6k architecture), and @option{auto}, which uses the
+best available method for the selected processor.  The default setting is
+@option{auto}.
+
+@item -mword-relocations
+@opindex mword-relocations
+Only generate absolute relocations on word sized values (i.e. R_ARM_ABS32).
+This is enabled by default on targets (uClinux, SymbianOS) where the runtime
+loader imposes this restriction, and when @option{-fpic} or @option{-fPIC}
+is specified.
+
+@end table
+
+@node AVR Options
+@subsection AVR Options
+@cindex AVR Options
+
+These options are defined for AVR implementations:
+
+@table @gcctabopt
+@item -mmcu=@var{mcu}
+@opindex mmcu
+Specify ATMEL AVR instruction set or MCU type.
+
+Instruction set avr1 is for the minimal AVR core, not supported by the C
+compiler, only for assembler programs (MCU types: at90s1200, attiny10,
+attiny11, attiny12, attiny15, attiny28).
+
+Instruction set avr2 (default) is for the classic AVR core with up to
+8K program memory space (MCU types: at90s2313, at90s2323, attiny22,
+at90s2333, at90s2343, at90s4414, at90s4433, at90s4434, at90s8515,
+at90c8534, at90s8535).
+
+Instruction set avr3 is for the classic AVR core with up to 128K program
+memory space (MCU types: atmega103, atmega603, at43usb320, at76c711).
+
+Instruction set avr4 is for the enhanced AVR core with up to 8K program
+memory space (MCU types: atmega8, atmega83, atmega85).
+
+Instruction set avr5 is for the enhanced AVR core with up to 128K program
+memory space (MCU types: atmega16, atmega161, atmega163, atmega32, atmega323,
+atmega64, atmega128, at43usb355, at94k).
+
+@item -msize
+@opindex msize
+Output instruction sizes to the asm file.
+
+@item -mno-interrupts
+@opindex mno-interrupts
+Generated code is not compatible with hardware interrupts.
+Code size will be smaller.
+
+@item -mcall-prologues
+@opindex mcall-prologues
+Functions prologues/epilogues expanded as call to appropriate
+subroutines.  Code size will be smaller.
+
+@item -mno-tablejump
+@opindex mno-tablejump
+Do not generate tablejump insns which sometimes increase code size.
+The option is now deprecated in favor of the equivalent 
+@option{-fno-jump-tables}
+
+@item -mtiny-stack
+@opindex mtiny-stack
+Change only the low 8 bits of the stack pointer.
+
+@item -mint8
+@opindex mint8
+Assume int to be 8 bit integer.  This affects the sizes of all types: A
+char will be 1 byte, an int will be 1 byte, an long will be 2 bytes
+and long long will be 4 bytes.  Please note that this option does not
+comply to the C standards, but it will provide you with smaller code
+size.
+@end table
+
+@node Blackfin Options
+@subsection Blackfin Options
+@cindex Blackfin Options
+
+@table @gcctabopt
+@item -mcpu=@var{cpu}@r{[}-@var{sirevision}@r{]}
+@opindex mcpu=
+Specifies the name of the target Blackfin processor.  Currently, @var{cpu}
+can be one of @samp{bf512}, @samp{bf514}, @samp{bf516}, @samp{bf518},
+@samp{bf522}, @samp{bf523}, @samp{bf524}, @samp{bf525}, @samp{bf526},
+@samp{bf527}, @samp{bf531}, @samp{bf532}, @samp{bf533},
+@samp{bf534}, @samp{bf536}, @samp{bf537}, @samp{bf538}, @samp{bf539},
+@samp{bf542}, @samp{bf544}, @samp{bf547}, @samp{bf548}, @samp{bf549},
+@samp{bf561}.
+The optional @var{sirevision} specifies the silicon revision of the target
+Blackfin processor.  Any workarounds available for the targeted silicon revision
+will be enabled.  If @var{sirevision} is @samp{none}, no workarounds are enabled.
+If @var{sirevision} is @samp{any}, all workarounds for the targeted processor
+will be enabled.  The @code{__SILICON_REVISION__} macro is defined to two
+hexadecimal digits representing the major and minor numbers in the silicon
+revision.  If @var{sirevision} is @samp{none}, the @code{__SILICON_REVISION__}
+is not defined.  If @var{sirevision} is @samp{any}, the
+@code{__SILICON_REVISION__} is defined to be @code{0xffff}.
+If this optional @var{sirevision} is not used, GCC assumes the latest known
+silicon revision of the targeted Blackfin processor.
+
+Support for @samp{bf561} is incomplete.  For @samp{bf561},
+Only the processor macro is defined.
+Without this option, @samp{bf532} is used as the processor by default.
+The corresponding predefined processor macros for @var{cpu} is to
+be defined.  And for @samp{bfin-elf} toolchain, this causes the hardware BSP
+provided by libgloss to be linked in if @option{-msim} is not given.
+
+@item -msim
+@opindex msim
+Specifies that the program will be run on the simulator.  This causes
+the simulator BSP provided by libgloss to be linked in.  This option
+has effect only for @samp{bfin-elf} toolchain.
+Certain other options, such as @option{-mid-shared-library} and
+@option{-mfdpic}, imply @option{-msim}.
+
+@item -momit-leaf-frame-pointer
+@opindex momit-leaf-frame-pointer
+Don't keep the frame pointer in a register for leaf functions.  This
+avoids the instructions to save, set up and restore frame pointers and
+makes an extra register available in leaf functions.  The option
+@option{-fomit-frame-pointer} removes the frame pointer for all functions
+which might make debugging harder.
+
+@item -mspecld-anomaly
+@opindex mspecld-anomaly
+When enabled, the compiler will ensure that the generated code does not
+contain speculative loads after jump instructions. If this option is used,
+@code{__WORKAROUND_SPECULATIVE_LOADS} is defined.
+
+@item -mno-specld-anomaly
+@opindex mno-specld-anomaly
+Don't generate extra code to prevent speculative loads from occurring.
+
+@item -mcsync-anomaly
+@opindex mcsync-anomaly
+When enabled, the compiler will ensure that the generated code does not
+contain CSYNC or SSYNC instructions too soon after conditional branches.
+If this option is used, @code{__WORKAROUND_SPECULATIVE_SYNCS} is defined.
+
+@item -mno-csync-anomaly
+@opindex mno-csync-anomaly
+Don't generate extra code to prevent CSYNC or SSYNC instructions from
+occurring too soon after a conditional branch.
+
+@item -mlow-64k
+@opindex mlow-64k
+When enabled, the compiler is free to take advantage of the knowledge that
+the entire program fits into the low 64k of memory.
+
+@item -mno-low-64k
+@opindex mno-low-64k
+Assume that the program is arbitrarily large.  This is the default.
+
+@item -mstack-check-l1
+@opindex mstack-check-l1
+Do stack checking using information placed into L1 scratchpad memory by the
+uClinux kernel.
+
+@item -mid-shared-library
+@opindex mid-shared-library
+Generate code that supports shared libraries via the library ID method.
+This allows for execute in place and shared libraries in an environment
+without virtual memory management.  This option implies @option{-fPIC}.
+With a @samp{bfin-elf} target, this option implies @option{-msim}.
+
+@item -mno-id-shared-library
+@opindex mno-id-shared-library
+Generate code that doesn't assume ID based shared libraries are being used.
+This is the default.
+
+@item -mleaf-id-shared-library
+@opindex mleaf-id-shared-library
+Generate code that supports shared libraries via the library ID method,
+but assumes that this library or executable won't link against any other
+ID shared libraries.  That allows the compiler to use faster code for jumps
+and calls.
+
+@item -mno-leaf-id-shared-library
+@opindex mno-leaf-id-shared-library
+Do not assume that the code being compiled won't link against any ID shared
+libraries.  Slower code will be generated for jump and call insns.
+
+@item -mshared-library-id=n
+@opindex mshared-library-id
+Specified the identification number of the ID based shared library being
+compiled.  Specifying a value of 0 will generate more compact code, specifying
+other values will force the allocation of that number to the current
+library but is no more space or time efficient than omitting this option.
+
+@item -msep-data
+@opindex msep-data
+Generate code that allows the data segment to be located in a different
+area of memory from the text segment.  This allows for execute in place in
+an environment without virtual memory management by eliminating relocations
+against the text section.
+
+@item -mno-sep-data
+@opindex mno-sep-data
+Generate code that assumes that the data segment follows the text segment.
+This is the default.
+
+@item -mlong-calls
+@itemx -mno-long-calls
+@opindex mlong-calls
+@opindex mno-long-calls
+Tells the compiler to perform function calls by first loading the
+address of the function into a register and then performing a subroutine
+call on this register.  This switch is needed if the target function
+will lie outside of the 24 bit addressing range of the offset based
+version of subroutine call instruction.
+
+This feature is not enabled by default.  Specifying
+@option{-mno-long-calls} will restore the default behavior.  Note these
+switches have no effect on how the compiler generates code to handle
+function calls via function pointers.
+
+@item -mfast-fp
+@opindex mfast-fp
+Link with the fast floating-point library. This library relaxes some of
+the IEEE floating-point standard's rules for checking inputs against
+Not-a-Number (NAN), in the interest of performance.
+
+@item -minline-plt
+@opindex minline-plt
+Enable inlining of PLT entries in function calls to functions that are
+not known to bind locally.  It has no effect without @option{-mfdpic}.
+
+@item -mmulticore
+@opindex mmulticore
+Build standalone application for multicore Blackfin processor. Proper
+start files and link scripts will be used to support multicore.
+This option defines @code{__BFIN_MULTICORE}. It can only be used with
+@option{-mcpu=bf561@r{[}-@var{sirevision}@r{]}}. It can be used with
+@option{-mcorea} or @option{-mcoreb}. If it's used without
+@option{-mcorea} or @option{-mcoreb}, single application/dual core
+programming model is used. In this model, the main function of Core B
+should be named as coreb_main. If it's used with @option{-mcorea} or
+@option{-mcoreb}, one application per core programming model is used.
+If this option is not used, single core application programming
+model is used.
+
+@item -mcorea
+@opindex mcorea
+Build standalone application for Core A of BF561 when using
+one application per core programming model. Proper start files
+and link scripts will be used to support Core A. This option
+defines @code{__BFIN_COREA}. It must be used with @option{-mmulticore}.
+
+@item -mcoreb
+@opindex mcoreb
+Build standalone application for Core B of BF561 when using
+one application per core programming model. Proper start files
+and link scripts will be used to support Core B. This option
+defines @code{__BFIN_COREB}. When this option is used, coreb_main
+should be used instead of main. It must be used with
+@option{-mmulticore}. 
+
+@item -msdram
+@opindex msdram
+Build standalone application for SDRAM. Proper start files and
+link scripts will be used to put the application into SDRAM.
+Loader should initialize SDRAM before loading the application
+into SDRAM. This option defines @code{__BFIN_SDRAM}.
+
+@item -micplb
+@opindex micplb
+Assume that ICPLBs are enabled at runtime.  This has an effect on certain
+anomaly workarounds.  For Linux targets, the default is to assume ICPLBs
+are enabled; for standalone applications the default is off.
+@end table
+
+@node CRIS Options
+@subsection CRIS Options
+@cindex CRIS Options
+
+These options are defined specifically for the CRIS ports.
+
+@table @gcctabopt
+@item -march=@var{architecture-type}
+@itemx -mcpu=@var{architecture-type}
+@opindex march
+@opindex mcpu
+Generate code for the specified architecture.  The choices for
+@var{architecture-type} are @samp{v3}, @samp{v8} and @samp{v10} for
+respectively ETRAX@w{ }4, ETRAX@w{ }100, and ETRAX@w{ }100@w{ }LX@.
+Default is @samp{v0} except for cris-axis-linux-gnu, where the default is
+@samp{v10}.
+
+@item -mtune=@var{architecture-type}
+@opindex mtune
+Tune to @var{architecture-type} everything applicable about the generated
+code, except for the ABI and the set of available instructions.  The
+choices for @var{architecture-type} are the same as for
+@option{-march=@var{architecture-type}}.
+
+@item -mmax-stack-frame=@var{n}
+@opindex mmax-stack-frame
+Warn when the stack frame of a function exceeds @var{n} bytes.
+
+@item -metrax4
+@itemx -metrax100
+@opindex metrax4
+@opindex metrax100
+The options @option{-metrax4} and @option{-metrax100} are synonyms for
+@option{-march=v3} and @option{-march=v8} respectively.
+
+@item -mmul-bug-workaround
+@itemx -mno-mul-bug-workaround
+@opindex mmul-bug-workaround
+@opindex mno-mul-bug-workaround
+Work around a bug in the @code{muls} and @code{mulu} instructions for CPU
+models where it applies.  This option is active by default.
+
+@item -mpdebug
+@opindex mpdebug
+Enable CRIS-specific verbose debug-related information in the assembly
+code.  This option also has the effect to turn off the @samp{#NO_APP}
+formatted-code indicator to the assembler at the beginning of the
+assembly file.
+
+@item -mcc-init
+@opindex mcc-init
+Do not use condition-code results from previous instruction; always emit
+compare and test instructions before use of condition codes.
+
+@item -mno-side-effects
+@opindex mno-side-effects
+Do not emit instructions with side-effects in addressing modes other than
+post-increment.
+
+@item -mstack-align
+@itemx -mno-stack-align
+@itemx -mdata-align
+@itemx -mno-data-align
+@itemx -mconst-align
+@itemx -mno-const-align
+@opindex mstack-align
+@opindex mno-stack-align
+@opindex mdata-align
+@opindex mno-data-align
+@opindex mconst-align
+@opindex mno-const-align
+These options (no-options) arranges (eliminate arrangements) for the
+stack-frame, individual data and constants to be aligned for the maximum
+single data access size for the chosen CPU model.  The default is to
+arrange for 32-bit alignment.  ABI details such as structure layout are
+not affected by these options.
+
+@item -m32-bit
+@itemx -m16-bit
+@itemx -m8-bit
+@opindex m32-bit
+@opindex m16-bit
+@opindex m8-bit
+Similar to the stack- data- and const-align options above, these options
+arrange for stack-frame, writable data and constants to all be 32-bit,
+16-bit or 8-bit aligned.  The default is 32-bit alignment.
+
+@item -mno-prologue-epilogue
+@itemx -mprologue-epilogue
+@opindex mno-prologue-epilogue
+@opindex mprologue-epilogue
+With @option{-mno-prologue-epilogue}, the normal function prologue and
+epilogue that sets up the stack-frame are omitted and no return
+instructions or return sequences are generated in the code.  Use this
+option only together with visual inspection of the compiled code: no
+warnings or errors are generated when call-saved registers must be saved,
+or storage for local variable needs to be allocated.
+
+@item -mno-gotplt
+@itemx -mgotplt
+@opindex mno-gotplt
+@opindex mgotplt
+With @option{-fpic} and @option{-fPIC}, don't generate (do generate)
+instruction sequences that load addresses for functions from the PLT part
+of the GOT rather than (traditional on other architectures) calls to the
+PLT@.  The default is @option{-mgotplt}.
+
+@item -melf
+@opindex melf
+Legacy no-op option only recognized with the cris-axis-elf and
+cris-axis-linux-gnu targets.
+
+@item -mlinux
+@opindex mlinux
+Legacy no-op option only recognized with the cris-axis-linux-gnu target.
+
+@item -sim
+@opindex sim
+This option, recognized for the cris-axis-elf arranges
+to link with input-output functions from a simulator library.  Code,
+initialized data and zero-initialized data are allocated consecutively.
+
+@item -sim2
+@opindex sim2
+Like @option{-sim}, but pass linker options to locate initialized data at
+0x40000000 and zero-initialized data at 0x80000000.
+@end table
+
+@node CRX Options
+@subsection CRX Options
+@cindex CRX Options
+
+These options are defined specifically for the CRX ports.
+
+@table @gcctabopt
+
+@item -mmac
+@opindex mmac
+Enable the use of multiply-accumulate instructions. Disabled by default.
+
+@item -mpush-args
+@opindex mpush-args
+Push instructions will be used to pass outgoing arguments when functions
+are called. Enabled by default.
+@end table
+
+@node Darwin Options
+@subsection Darwin Options
+@cindex Darwin options
+
+These options are defined for all architectures running the Darwin operating
+system.
+
+FSF GCC on Darwin does not create ``fat'' object files; it will create
+an object file for the single architecture that it was built to
+target.  Apple's GCC on Darwin does create ``fat'' files if multiple
+@option{-arch} options are used; it does so by running the compiler or
+linker multiple times and joining the results together with
+@file{lipo}.
+
+The subtype of the file created (like @samp{ppc7400} or @samp{ppc970} or
+@samp{i686}) is determined by the flags that specify the ISA
+that GCC is targetting, like @option{-mcpu} or @option{-march}.  The
+@option{-force_cpusubtype_ALL} option can be used to override this.
+
+The Darwin tools vary in their behavior when presented with an ISA
+mismatch.  The assembler, @file{as}, will only permit instructions to
+be used that are valid for the subtype of the file it is generating,
+so you cannot put 64-bit instructions in an @samp{ppc750} object file.
+The linker for shared libraries, @file{/usr/bin/libtool}, will fail
+and print an error if asked to create a shared library with a less
+restrictive subtype than its input files (for instance, trying to put
+a @samp{ppc970} object file in a @samp{ppc7400} library).  The linker
+for executables, @file{ld}, will quietly give the executable the most
+restrictive subtype of any of its input files.
+
+@table @gcctabopt
+@item -F@var{dir}
+@opindex F
+Add the framework directory @var{dir} to the head of the list of
+directories to be searched for header files.  These directories are
+interleaved with those specified by @option{-I} options and are
+scanned in a left-to-right order.
+
+A framework directory is a directory with frameworks in it.  A
+framework is a directory with a @samp{"Headers"} and/or
+@samp{"PrivateHeaders"} directory contained directly in it that ends
+in @samp{".framework"}.  The name of a framework is the name of this
+directory excluding the @samp{".framework"}.  Headers associated with
+the framework are found in one of those two directories, with
+@samp{"Headers"} being searched first.  A subframework is a framework
+directory that is in a framework's @samp{"Frameworks"} directory.
+Includes of subframework headers can only appear in a header of a
+framework that contains the subframework, or in a sibling subframework
+header.  Two subframeworks are siblings if they occur in the same
+framework.  A subframework should not have the same name as a
+framework, a warning will be issued if this is violated.  Currently a
+subframework cannot have subframeworks, in the future, the mechanism
+may be extended to support this.  The standard frameworks can be found
+in @samp{"/System/Library/Frameworks"} and
+@samp{"/Library/Frameworks"}.  An example include looks like
+@code{#include <Framework/header.h>}, where @samp{Framework} denotes
+the name of the framework and header.h is found in the
+@samp{"PrivateHeaders"} or @samp{"Headers"} directory.
+
+@item -iframework@var{dir}
+@opindex iframework
+Like @option{-F} except the directory is a treated as a system
+directory.  The main difference between this @option{-iframework} and
+@option{-F} is that with @option{-iframework} the compiler does not
+warn about constructs contained within header files found via
+@var{dir}.  This option is valid only for the C family of languages.
+
+@item -gused
+@opindex gused
+Emit debugging information for symbols that are used.  For STABS
+debugging format, this enables @option{-feliminate-unused-debug-symbols}.
+This is by default ON@.
+
+@item -gfull
+@opindex gfull
+Emit debugging information for all symbols and types.
+
+@item -mmacosx-version-min=@var{version}
+The earliest version of MacOS X that this executable will run on
+is @var{version}.  Typical values of @var{version} include @code{10.1},
+@code{10.2}, and @code{10.3.9}.
+
+If the compiler was built to use the system's headers by default,
+then the default for this option is the system version on which the
+compiler is running, otherwise the default is to make choices which
+are compatible with as many systems and code bases as possible.
+
+@item -mkernel
+@opindex mkernel
+Enable kernel development mode.  The @option{-mkernel} option sets
+@option{-static}, @option{-fno-common}, @option{-fno-cxa-atexit},
+@option{-fno-exceptions}, @option{-fno-non-call-exceptions},
+@option{-fapple-kext}, @option{-fno-weak} and @option{-fno-rtti} where
+applicable.  This mode also sets @option{-mno-altivec},
+@option{-msoft-float}, @option{-fno-builtin} and
+@option{-mlong-branch} for PowerPC targets.
+
+@item -mone-byte-bool
+@opindex mone-byte-bool
+Override the defaults for @samp{bool} so that @samp{sizeof(bool)==1}.
+By default @samp{sizeof(bool)} is @samp{4} when compiling for
+Darwin/PowerPC and @samp{1} when compiling for Darwin/x86, so this
+option has no effect on x86.
+
+@strong{Warning:} The @option{-mone-byte-bool} switch causes GCC
+to generate code that is not binary compatible with code generated
+without that switch.  Using this switch may require recompiling all
+other modules in a program, including system libraries.  Use this
+switch to conform to a non-default data model.
+
+@item -mfix-and-continue
+@itemx -ffix-and-continue
+@itemx -findirect-data
+@opindex mfix-and-continue
+@opindex ffix-and-continue
+@opindex findirect-data
+Generate code suitable for fast turn around development.  Needed to
+enable gdb to dynamically load @code{.o} files into already running
+programs.  @option{-findirect-data} and @option{-ffix-and-continue}
+are provided for backwards compatibility.
+
+@item -all_load
+@opindex all_load
+Loads all members of static archive libraries.
+See man ld(1) for more information.
+
+@item -arch_errors_fatal
+@opindex arch_errors_fatal
+Cause the errors having to do with files that have the wrong architecture
+to be fatal.
+
+@item -bind_at_load
+@opindex bind_at_load
+Causes the output file to be marked such that the dynamic linker will
+bind all undefined references when the file is loaded or launched.
+
+@item -bundle
+@opindex bundle
+Produce a Mach-o bundle format file.
+See man ld(1) for more information.
+
+@item -bundle_loader @var{executable}
+@opindex bundle_loader
+This option specifies the @var{executable} that will be loading the build
+output file being linked.  See man ld(1) for more information.
+
+@item -dynamiclib
+@opindex dynamiclib
+When passed this option, GCC will produce a dynamic library instead of
+an executable when linking, using the Darwin @file{libtool} command.
+
+@item -force_cpusubtype_ALL
+@opindex force_cpusubtype_ALL
+This causes GCC's output file to have the @var{ALL} subtype, instead of
+one controlled by the @option{-mcpu} or @option{-march} option.
+
+@item -allowable_client  @var{client_name}
+@itemx -client_name
+@itemx -compatibility_version
+@itemx -current_version
+@itemx -dead_strip
+@itemx -dependency-file
+@itemx -dylib_file
+@itemx -dylinker_install_name
+@itemx -dynamic
+@itemx -exported_symbols_list
+@itemx -filelist
+@itemx -flat_namespace
+@itemx -force_flat_namespace
+@itemx -headerpad_max_install_names
+@itemx -image_base
+@itemx -init
+@itemx -install_name
+@itemx -keep_private_externs
+@itemx -multi_module
+@itemx -multiply_defined
+@itemx -multiply_defined_unused
+@itemx -noall_load
+@itemx -no_dead_strip_inits_and_terms
+@itemx -nofixprebinding
+@itemx -nomultidefs
+@itemx -noprebind
+@itemx -noseglinkedit
+@itemx -pagezero_size
+@itemx -prebind
+@itemx -prebind_all_twolevel_modules
+@itemx -private_bundle
+@itemx -read_only_relocs
+@itemx -sectalign
+@itemx -sectobjectsymbols
+@itemx -whyload
+@itemx -seg1addr
+@itemx -sectcreate
+@itemx -sectobjectsymbols
+@itemx -sectorder
+@itemx -segaddr
+@itemx -segs_read_only_addr
+@itemx -segs_read_write_addr
+@itemx -seg_addr_table
+@itemx -seg_addr_table_filename
+@itemx -seglinkedit
+@itemx -segprot
+@itemx -segs_read_only_addr
+@itemx -segs_read_write_addr
+@itemx -single_module
+@itemx -static
+@itemx -sub_library
+@itemx -sub_umbrella
+@itemx -twolevel_namespace
+@itemx -umbrella
+@itemx -undefined
+@itemx -unexported_symbols_list
+@itemx -weak_reference_mismatches
+@itemx -whatsloaded
+@opindex allowable_client
+@opindex client_name
+@opindex compatibility_version
+@opindex current_version
+@opindex dead_strip
+@opindex dependency-file
+@opindex dylib_file
+@opindex dylinker_install_name
+@opindex dynamic
+@opindex exported_symbols_list
+@opindex filelist
+@opindex flat_namespace
+@opindex force_flat_namespace
+@opindex headerpad_max_install_names
+@opindex image_base
+@opindex init
+@opindex install_name
+@opindex keep_private_externs
+@opindex multi_module
+@opindex multiply_defined
+@opindex multiply_defined_unused
+@opindex noall_load
+@opindex no_dead_strip_inits_and_terms
+@opindex nofixprebinding
+@opindex nomultidefs
+@opindex noprebind
+@opindex noseglinkedit
+@opindex pagezero_size
+@opindex prebind
+@opindex prebind_all_twolevel_modules
+@opindex private_bundle
+@opindex read_only_relocs
+@opindex sectalign
+@opindex sectobjectsymbols
+@opindex whyload
+@opindex seg1addr
+@opindex sectcreate
+@opindex sectobjectsymbols
+@opindex sectorder
+@opindex segaddr
+@opindex segs_read_only_addr
+@opindex segs_read_write_addr
+@opindex seg_addr_table
+@opindex seg_addr_table_filename
+@opindex seglinkedit
+@opindex segprot
+@opindex segs_read_only_addr
+@opindex segs_read_write_addr
+@opindex single_module
+@opindex static
+@opindex sub_library
+@opindex sub_umbrella
+@opindex twolevel_namespace
+@opindex umbrella
+@opindex undefined
+@opindex unexported_symbols_list
+@opindex weak_reference_mismatches
+@opindex whatsloaded
+These options are passed to the Darwin linker.  The Darwin linker man page
+describes them in detail.
+@end table
+
+@node DEC Alpha Options
+@subsection DEC Alpha Options
+
+These @samp{-m} options are defined for the DEC Alpha implementations:
+
+@table @gcctabopt
+@item -mno-soft-float
+@itemx -msoft-float
+@opindex mno-soft-float
+@opindex msoft-float
+Use (do not use) the hardware floating-point instructions for
+floating-point operations.  When @option{-msoft-float} is specified,
+functions in @file{libgcc.a} will be used to perform floating-point
+operations.  Unless they are replaced by routines that emulate the
+floating-point operations, or compiled in such a way as to call such
+emulations routines, these routines will issue floating-point
+operations.   If you are compiling for an Alpha without floating-point
+operations, you must ensure that the library is built so as not to call
+them.
+
+Note that Alpha implementations without floating-point operations are
+required to have floating-point registers.
+
+@item -mfp-reg
+@itemx -mno-fp-regs
+@opindex mfp-reg
+@opindex mno-fp-regs
+Generate code that uses (does not use) the floating-point register set.
+@option{-mno-fp-regs} implies @option{-msoft-float}.  If the floating-point
+register set is not used, floating point operands are passed in integer
+registers as if they were integers and floating-point results are passed
+in @code{$0} instead of @code{$f0}.  This is a non-standard calling sequence,
+so any function with a floating-point argument or return value called by code
+compiled with @option{-mno-fp-regs} must also be compiled with that
+option.
+
+A typical use of this option is building a kernel that does not use,
+and hence need not save and restore, any floating-point registers.
+
+@item -mieee
+@opindex mieee
+The Alpha architecture implements floating-point hardware optimized for
+maximum performance.  It is mostly compliant with the IEEE floating
+point standard.  However, for full compliance, software assistance is
+required.  This option generates code fully IEEE compliant code
+@emph{except} that the @var{inexact-flag} is not maintained (see below).
+If this option is turned on, the preprocessor macro @code{_IEEE_FP} is
+defined during compilation.  The resulting code is less efficient but is
+able to correctly support denormalized numbers and exceptional IEEE
+values such as not-a-number and plus/minus infinity.  Other Alpha
+compilers call this option @option{-ieee_with_no_inexact}.
+
+@item -mieee-with-inexact
+@opindex mieee-with-inexact
+This is like @option{-mieee} except the generated code also maintains
+the IEEE @var{inexact-flag}.  Turning on this option causes the
+generated code to implement fully-compliant IEEE math.  In addition to
+@code{_IEEE_FP}, @code{_IEEE_FP_EXACT} is defined as a preprocessor
+macro.  On some Alpha implementations the resulting code may execute
+significantly slower than the code generated by default.  Since there is
+very little code that depends on the @var{inexact-flag}, you should
+normally not specify this option.  Other Alpha compilers call this
+option @option{-ieee_with_inexact}.
+
+@item -mfp-trap-mode=@var{trap-mode}
+@opindex mfp-trap-mode
+This option controls what floating-point related traps are enabled.
+Other Alpha compilers call this option @option{-fptm @var{trap-mode}}.
+The trap mode can be set to one of four values:
+
+@table @samp
+@item n
+This is the default (normal) setting.  The only traps that are enabled
+are the ones that cannot be disabled in software (e.g., division by zero
+trap).
+
+@item u
+In addition to the traps enabled by @samp{n}, underflow traps are enabled
+as well.
+
+@item su
+Like @samp{u}, but the instructions are marked to be safe for software
+completion (see Alpha architecture manual for details).
+
+@item sui
+Like @samp{su}, but inexact traps are enabled as well.
+@end table
+
+@item -mfp-rounding-mode=@var{rounding-mode}
+@opindex mfp-rounding-mode
+Selects the IEEE rounding mode.  Other Alpha compilers call this option
+@option{-fprm @var{rounding-mode}}.  The @var{rounding-mode} can be one
+of:
+
+@table @samp
+@item n
+Normal IEEE rounding mode.  Floating point numbers are rounded towards
+the nearest machine number or towards the even machine number in case
+of a tie.
+
+@item m
+Round towards minus infinity.
+
+@item c
+Chopped rounding mode.  Floating point numbers are rounded towards zero.
+
+@item d
+Dynamic rounding mode.  A field in the floating point control register
+(@var{fpcr}, see Alpha architecture reference manual) controls the
+rounding mode in effect.  The C library initializes this register for
+rounding towards plus infinity.  Thus, unless your program modifies the
+@var{fpcr}, @samp{d} corresponds to round towards plus infinity.
+@end table
+
+@item -mtrap-precision=@var{trap-precision}
+@opindex mtrap-precision
+In the Alpha architecture, floating point traps are imprecise.  This
+means without software assistance it is impossible to recover from a
+floating trap and program execution normally needs to be terminated.
+GCC can generate code that can assist operating system trap handlers
+in determining the exact location that caused a floating point trap.
+Depending on the requirements of an application, different levels of
+precisions can be selected:
+
+@table @samp
+@item p
+Program precision.  This option is the default and means a trap handler
+can only identify which program caused a floating point exception.
+
+@item f
+Function precision.  The trap handler can determine the function that
+caused a floating point exception.
+
+@item i
+Instruction precision.  The trap handler can determine the exact
+instruction that caused a floating point exception.
+@end table
+
+Other Alpha compilers provide the equivalent options called
+@option{-scope_safe} and @option{-resumption_safe}.
+
+@item -mieee-conformant
+@opindex mieee-conformant
+This option marks the generated code as IEEE conformant.  You must not
+use this option unless you also specify @option{-mtrap-precision=i} and either
+@option{-mfp-trap-mode=su} or @option{-mfp-trap-mode=sui}.  Its only effect
+is to emit the line @samp{.eflag 48} in the function prologue of the
+generated assembly file.  Under DEC Unix, this has the effect that
+IEEE-conformant math library routines will be linked in.
+
+@item -mbuild-constants
+@opindex mbuild-constants
+Normally GCC examines a 32- or 64-bit integer constant to
+see if it can construct it from smaller constants in two or three
+instructions.  If it cannot, it will output the constant as a literal and
+generate code to load it from the data segment at runtime.
+
+Use this option to require GCC to construct @emph{all} integer constants
+using code, even if it takes more instructions (the maximum is six).
+
+You would typically use this option to build a shared library dynamic
+loader.  Itself a shared library, it must relocate itself in memory
+before it can find the variables and constants in its own data segment.
+
+@item -malpha-as
+@itemx -mgas
+@opindex malpha-as
+@opindex mgas
+Select whether to generate code to be assembled by the vendor-supplied
+assembler (@option{-malpha-as}) or by the GNU assembler @option{-mgas}.
+
+@item -mbwx
+@itemx -mno-bwx
+@itemx -mcix
+@itemx -mno-cix
+@itemx -mfix
+@itemx -mno-fix
+@itemx -mmax
+@itemx -mno-max
+@opindex mbwx
+@opindex mno-bwx
+@opindex mcix
+@opindex mno-cix
+@opindex mfix
+@opindex mno-fix
+@opindex mmax
+@opindex mno-max
+Indicate whether GCC should generate code to use the optional BWX,
+CIX, FIX and MAX instruction sets.  The default is to use the instruction
+sets supported by the CPU type specified via @option{-mcpu=} option or that
+of the CPU on which GCC was built if none was specified.
+
+@item -mfloat-vax
+@itemx -mfloat-ieee
+@opindex mfloat-vax
+@opindex mfloat-ieee
+Generate code that uses (does not use) VAX F and G floating point
+arithmetic instead of IEEE single and double precision.
+
+@item -mexplicit-relocs
+@itemx -mno-explicit-relocs
+@opindex mexplicit-relocs
+@opindex mno-explicit-relocs
+Older Alpha assemblers provided no way to generate symbol relocations
+except via assembler macros.  Use of these macros does not allow
+optimal instruction scheduling.  GNU binutils as of version 2.12
+supports a new syntax that allows the compiler to explicitly mark
+which relocations should apply to which instructions.  This option
+is mostly useful for debugging, as GCC detects the capabilities of
+the assembler when it is built and sets the default accordingly.
+
+@item -msmall-data
+@itemx -mlarge-data
+@opindex msmall-data
+@opindex mlarge-data
+When @option{-mexplicit-relocs} is in effect, static data is
+accessed via @dfn{gp-relative} relocations.  When @option{-msmall-data}
+is used, objects 8 bytes long or smaller are placed in a @dfn{small data area}
+(the @code{.sdata} and @code{.sbss} sections) and are accessed via
+16-bit relocations off of the @code{$gp} register.  This limits the
+size of the small data area to 64KB, but allows the variables to be
+directly accessed via a single instruction.
+
+The default is @option{-mlarge-data}.  With this option the data area
+is limited to just below 2GB@.  Programs that require more than 2GB of
+data must use @code{malloc} or @code{mmap} to allocate the data in the
+heap instead of in the program's data segment.
+
+When generating code for shared libraries, @option{-fpic} implies
+@option{-msmall-data} and @option{-fPIC} implies @option{-mlarge-data}.
+
+@item -msmall-text
+@itemx -mlarge-text
+@opindex msmall-text
+@opindex mlarge-text
+When @option{-msmall-text} is used, the compiler assumes that the
+code of the entire program (or shared library) fits in 4MB, and is
+thus reachable with a branch instruction.  When @option{-msmall-data}
+is used, the compiler can assume that all local symbols share the
+same @code{$gp} value, and thus reduce the number of instructions
+required for a function call from 4 to 1.
+
+The default is @option{-mlarge-text}.
+
+@item -mcpu=@var{cpu_type}
+@opindex mcpu
+Set the instruction set and instruction scheduling parameters for
+machine type @var{cpu_type}.  You can specify either the @samp{EV}
+style name or the corresponding chip number.  GCC supports scheduling
+parameters for the EV4, EV5 and EV6 family of processors and will
+choose the default values for the instruction set from the processor
+you specify.  If you do not specify a processor type, GCC will default
+to the processor on which the compiler was built.
+
+Supported values for @var{cpu_type} are
+
+@table @samp
+@item ev4
+@itemx ev45
+@itemx 21064
+Schedules as an EV4 and has no instruction set extensions.
+
+@item ev5
+@itemx 21164
+Schedules as an EV5 and has no instruction set extensions.
+
+@item ev56
+@itemx 21164a
+Schedules as an EV5 and supports the BWX extension.
+
+@item pca56
+@itemx 21164pc
+@itemx 21164PC
+Schedules as an EV5 and supports the BWX and MAX extensions.
+
+@item ev6
+@itemx 21264
+Schedules as an EV6 and supports the BWX, FIX, and MAX extensions.
+
+@item ev67
+@itemx 21264a
+Schedules as an EV6 and supports the BWX, CIX, FIX, and MAX extensions.
+@end table
+
+Native Linux/GNU toolchains also support the value @samp{native},
+which selects the best architecture option for the host processor.
+@option{-mcpu=native} has no effect if GCC does not recognize
+the processor.
+
+@item -mtune=@var{cpu_type}
+@opindex mtune
+Set only the instruction scheduling parameters for machine type
+@var{cpu_type}.  The instruction set is not changed.
+
+Native Linux/GNU toolchains also support the value @samp{native},
+which selects the best architecture option for the host processor.
+@option{-mtune=native} has no effect if GCC does not recognize
+the processor.
+
+@item -mmemory-latency=@var{time}
+@opindex mmemory-latency
+Sets the latency the scheduler should assume for typical memory
+references as seen by the application.  This number is highly
+dependent on the memory access patterns used by the application
+and the size of the external cache on the machine.
+
+Valid options for @var{time} are
+
+@table @samp
+@item @var{number}
+A decimal number representing clock cycles.
+
+@item L1
+@itemx L2
+@itemx L3
+@itemx main
+The compiler contains estimates of the number of clock cycles for
+``typical'' EV4 & EV5 hardware for the Level 1, 2 & 3 caches
+(also called Dcache, Scache, and Bcache), as well as to main memory.
+Note that L3 is only valid for EV5.
+
+@end table
+@end table
+
+@node DEC Alpha/VMS Options
+@subsection DEC Alpha/VMS Options
+
+These @samp{-m} options are defined for the DEC Alpha/VMS implementations:
+
+@table @gcctabopt
+@item -mvms-return-codes
+@opindex mvms-return-codes
+Return VMS condition codes from main.  The default is to return POSIX
+style condition (e.g.@: error) codes.
+@end table
+
+@node FR30 Options
+@subsection FR30 Options
+@cindex FR30 Options
+
+These options are defined specifically for the FR30 port.
+
+@table @gcctabopt
+
+@item -msmall-model
+@opindex msmall-model
+Use the small address space model.  This can produce smaller code, but
+it does assume that all symbolic values and addresses will fit into a
+20-bit range.
+
+@item -mno-lsim
+@opindex mno-lsim
+Assume that run-time support has been provided and so there is no need
+to include the simulator library (@file{libsim.a}) on the linker
+command line.
+
+@end table
+
+@node FRV Options
+@subsection FRV Options
+@cindex FRV Options
+
+@table @gcctabopt
+@item -mgpr-32
+@opindex mgpr-32
+
+Only use the first 32 general purpose registers.
+
+@item -mgpr-64
+@opindex mgpr-64
+
+Use all 64 general purpose registers.
+
+@item -mfpr-32
+@opindex mfpr-32
+
+Use only the first 32 floating point registers.
+
+@item -mfpr-64
+@opindex mfpr-64
+
+Use all 64 floating point registers
+
+@item -mhard-float
+@opindex mhard-float
+
+Use hardware instructions for floating point operations.
+
+@item -msoft-float
+@opindex msoft-float
+
+Use library routines for floating point operations.
+
+@item -malloc-cc
+@opindex malloc-cc
+
+Dynamically allocate condition code registers.
+
+@item -mfixed-cc
+@opindex mfixed-cc
+
+Do not try to dynamically allocate condition code registers, only
+use @code{icc0} and @code{fcc0}.
+
+@item -mdword
+@opindex mdword
+
+Change ABI to use double word insns.
+
+@item -mno-dword
+@opindex mno-dword
+
+Do not use double word instructions.
+
+@item -mdouble
+@opindex mdouble
+
+Use floating point double instructions.
+
+@item -mno-double
+@opindex mno-double
+
+Do not use floating point double instructions.
+
+@item -mmedia
+@opindex mmedia
+
+Use media instructions.
+
+@item -mno-media
+@opindex mno-media
+
+Do not use media instructions.
+
+@item -mmuladd
+@opindex mmuladd
+
+Use multiply and add/subtract instructions.
+
+@item -mno-muladd
+@opindex mno-muladd
+
+Do not use multiply and add/subtract instructions.
+
+@item -mfdpic
+@opindex mfdpic
+
+Select the FDPIC ABI, that uses function descriptors to represent
+pointers to functions.  Without any PIC/PIE-related options, it
+implies @option{-fPIE}.  With @option{-fpic} or @option{-fpie}, it
+assumes GOT entries and small data are within a 12-bit range from the
+GOT base address; with @option{-fPIC} or @option{-fPIE}, GOT offsets
+are computed with 32 bits.
+With a @samp{bfin-elf} target, this option implies @option{-msim}.
+
+@item -minline-plt
+@opindex minline-plt
+
+Enable inlining of PLT entries in function calls to functions that are
+not known to bind locally.  It has no effect without @option{-mfdpic}.
+It's enabled by default if optimizing for speed and compiling for
+shared libraries (i.e., @option{-fPIC} or @option{-fpic}), or when an
+optimization option such as @option{-O3} or above is present in the
+command line.
+
+@item -mTLS
+@opindex TLS
+
+Assume a large TLS segment when generating thread-local code.
+
+@item -mtls
+@opindex tls
+
+Do not assume a large TLS segment when generating thread-local code.
+
+@item -mgprel-ro
+@opindex mgprel-ro
+
+Enable the use of @code{GPREL} relocations in the FDPIC ABI for data
+that is known to be in read-only sections.  It's enabled by default,
+except for @option{-fpic} or @option{-fpie}: even though it may help
+make the global offset table smaller, it trades 1 instruction for 4.
+With @option{-fPIC} or @option{-fPIE}, it trades 3 instructions for 4,
+one of which may be shared by multiple symbols, and it avoids the need
+for a GOT entry for the referenced symbol, so it's more likely to be a
+win.  If it is not, @option{-mno-gprel-ro} can be used to disable it.
+
+@item -multilib-library-pic
+@opindex multilib-library-pic
+
+Link with the (library, not FD) pic libraries.  It's implied by
+@option{-mlibrary-pic}, as well as by @option{-fPIC} and
+@option{-fpic} without @option{-mfdpic}.  You should never have to use
+it explicitly.
+
+@item -mlinked-fp
+@opindex mlinked-fp
+
+Follow the EABI requirement of always creating a frame pointer whenever
+a stack frame is allocated.  This option is enabled by default and can
+be disabled with @option{-mno-linked-fp}.
+
+@item -mlong-calls
+@opindex mlong-calls
+
+Use indirect addressing to call functions outside the current
+compilation unit.  This allows the functions to be placed anywhere
+within the 32-bit address space.
+
+@item -malign-labels
+@opindex malign-labels
+
+Try to align labels to an 8-byte boundary by inserting nops into the
+previous packet.  This option only has an effect when VLIW packing
+is enabled.  It doesn't create new packets; it merely adds nops to
+existing ones.
+
+@item -mlibrary-pic
+@opindex mlibrary-pic
+
+Generate position-independent EABI code.
+
+@item -macc-4
+@opindex macc-4
+
+Use only the first four media accumulator registers.
+
+@item -macc-8
+@opindex macc-8
+
+Use all eight media accumulator registers.
+
+@item -mpack
+@opindex mpack
+
+Pack VLIW instructions.
+
+@item -mno-pack
+@opindex mno-pack
+
+Do not pack VLIW instructions.
+
+@item -mno-eflags
+@opindex mno-eflags
+
+Do not mark ABI switches in e_flags.
+
+@item -mcond-move
+@opindex mcond-move
+
+Enable the use of conditional-move instructions (default).
+
+This switch is mainly for debugging the compiler and will likely be removed
+in a future version.
+
+@item -mno-cond-move
+@opindex mno-cond-move
+
+Disable the use of conditional-move instructions.
+
+This switch is mainly for debugging the compiler and will likely be removed
+in a future version.
+
+@item -mscc
+@opindex mscc
+
+Enable the use of conditional set instructions (default).
+
+This switch is mainly for debugging the compiler and will likely be removed
+in a future version.
+
+@item -mno-scc
+@opindex mno-scc
+
+Disable the use of conditional set instructions.
+
+This switch is mainly for debugging the compiler and will likely be removed
+in a future version.
+
+@item -mcond-exec
+@opindex mcond-exec
+
+Enable the use of conditional execution (default).
+
+This switch is mainly for debugging the compiler and will likely be removed
+in a future version.
+
+@item -mno-cond-exec
+@opindex mno-cond-exec
+
+Disable the use of conditional execution.
+
+This switch is mainly for debugging the compiler and will likely be removed
+in a future version.
+
+@item -mvliw-branch
+@opindex mvliw-branch
+
+Run a pass to pack branches into VLIW instructions (default).
+
+This switch is mainly for debugging the compiler and will likely be removed
+in a future version.
+
+@item -mno-vliw-branch
+@opindex mno-vliw-branch
+
+Do not run a pass to pack branches into VLIW instructions.
+
+This switch is mainly for debugging the compiler and will likely be removed
+in a future version.
+
+@item -mmulti-cond-exec
+@opindex mmulti-cond-exec
+
+Enable optimization of @code{&&} and @code{||} in conditional execution
+(default).
+
+This switch is mainly for debugging the compiler and will likely be removed
+in a future version.
+
+@item -mno-multi-cond-exec
+@opindex mno-multi-cond-exec
+
+Disable optimization of @code{&&} and @code{||} in conditional execution.
+
+This switch is mainly for debugging the compiler and will likely be removed
+in a future version.
+
+@item -mnested-cond-exec
+@opindex mnested-cond-exec
+
+Enable nested conditional execution optimizations (default).
+
+This switch is mainly for debugging the compiler and will likely be removed
+in a future version.
+
+@item -mno-nested-cond-exec
+@opindex mno-nested-cond-exec
+
+Disable nested conditional execution optimizations.
+
+This switch is mainly for debugging the compiler and will likely be removed
+in a future version.
+
+@item -moptimize-membar
+@opindex moptimize-membar
+
+This switch removes redundant @code{membar} instructions from the
+compiler generated code.  It is enabled by default.
+
+@item -mno-optimize-membar
+@opindex mno-optimize-membar
+
+This switch disables the automatic removal of redundant @code{membar}
+instructions from the generated code.
+
+@item -mtomcat-stats
+@opindex mtomcat-stats
+
+Cause gas to print out tomcat statistics.
+
+@item -mcpu=@var{cpu}
+@opindex mcpu
+
+Select the processor type for which to generate code.  Possible values are
+@samp{frv}, @samp{fr550}, @samp{tomcat}, @samp{fr500}, @samp{fr450},
+@samp{fr405}, @samp{fr400}, @samp{fr300} and @samp{simple}.
+
+@end table
+
+@node GNU/Linux Options
+@subsection GNU/Linux Options
+
+These @samp{-m} options are defined for GNU/Linux targets:
+
+@table @gcctabopt
+@item -mglibc
+@opindex mglibc
+Use the GNU C library instead of uClibc.  This is the default except
+on @samp{*-*-linux-*uclibc*} targets.
+
+@item -muclibc
+@opindex muclibc
+Use uClibc instead of the GNU C library.  This is the default on
+@samp{*-*-linux-*uclibc*} targets.
+@end table
+
+@node H8/300 Options
+@subsection H8/300 Options
+
+These @samp{-m} options are defined for the H8/300 implementations:
+
+@table @gcctabopt
+@item -mrelax
+@opindex mrelax
+Shorten some address references at link time, when possible; uses the
+linker option @option{-relax}.  @xref{H8/300,, @code{ld} and the H8/300,
+ld, Using ld}, for a fuller description.
+
+@item -mh
+@opindex mh
+Generate code for the H8/300H@.
+
+@item -ms
+@opindex ms
+Generate code for the H8S@.
+
+@item -mn
+@opindex mn
+Generate code for the H8S and H8/300H in the normal mode.  This switch
+must be used either with @option{-mh} or @option{-ms}.
+
+@item -ms2600
+@opindex ms2600
+Generate code for the H8S/2600.  This switch must be used with @option{-ms}.
+
+@item -mint32
+@opindex mint32
+Make @code{int} data 32 bits by default.
+
+@item -malign-300
+@opindex malign-300
+On the H8/300H and H8S, use the same alignment rules as for the H8/300.
+The default for the H8/300H and H8S is to align longs and floats on 4
+byte boundaries.
+@option{-malign-300} causes them to be aligned on 2 byte boundaries.
+This option has no effect on the H8/300.
+@end table
+
+@node HPPA Options
+@subsection HPPA Options
+@cindex HPPA Options
+
+These @samp{-m} options are defined for the HPPA family of computers:
+
+@table @gcctabopt
+@item -march=@var{architecture-type}
+@opindex march
+Generate code for the specified architecture.  The choices for
+@var{architecture-type} are @samp{1.0} for PA 1.0, @samp{1.1} for PA
+1.1, and @samp{2.0} for PA 2.0 processors.  Refer to
+@file{/usr/lib/sched.models} on an HP-UX system to determine the proper
+architecture option for your machine.  Code compiled for lower numbered
+architectures will run on higher numbered architectures, but not the
+other way around.
+
+@item -mpa-risc-1-0
+@itemx -mpa-risc-1-1
+@itemx -mpa-risc-2-0
+@opindex mpa-risc-1-0
+@opindex mpa-risc-1-1
+@opindex mpa-risc-2-0
+Synonyms for @option{-march=1.0}, @option{-march=1.1}, and @option{-march=2.0} respectively.
+
+@item -mbig-switch
+@opindex mbig-switch
+Generate code suitable for big switch tables.  Use this option only if
+the assembler/linker complain about out of range branches within a switch
+table.
+
+@item -mjump-in-delay
+@opindex mjump-in-delay
+Fill delay slots of function calls with unconditional jump instructions
+by modifying the return pointer for the function call to be the target
+of the conditional jump.
+
+@item -mdisable-fpregs
+@opindex mdisable-fpregs
+Prevent floating point registers from being used in any manner.  This is
+necessary for compiling kernels which perform lazy context switching of
+floating point registers.  If you use this option and attempt to perform
+floating point operations, the compiler will abort.
+
+@item -mdisable-indexing
+@opindex mdisable-indexing
+Prevent the compiler from using indexing address modes.  This avoids some
+rather obscure problems when compiling MIG generated code under MACH@.
+
+@item -mno-space-regs
+@opindex mno-space-regs
+Generate code that assumes the target has no space registers.  This allows
+GCC to generate faster indirect calls and use unscaled index address modes.
+
+Such code is suitable for level 0 PA systems and kernels.
+
+@item -mfast-indirect-calls
+@opindex mfast-indirect-calls
+Generate code that assumes calls never cross space boundaries.  This
+allows GCC to emit code which performs faster indirect calls.
+
+This option will not work in the presence of shared libraries or nested
+functions.
+
+@item -mfixed-range=@var{register-range}
+@opindex mfixed-range
+Generate code treating the given register range as fixed registers.
+A fixed register is one that the register allocator can not use.  This is
+useful when compiling kernel code.  A register range is specified as
+two registers separated by a dash.  Multiple register ranges can be
+specified separated by a comma.
+
+@item -mlong-load-store
+@opindex mlong-load-store
+Generate 3-instruction load and store sequences as sometimes required by
+the HP-UX 10 linker.  This is equivalent to the @samp{+k} option to
+the HP compilers.
+
+@item -mportable-runtime
+@opindex mportable-runtime
+Use the portable calling conventions proposed by HP for ELF systems.
+
+@item -mgas
+@opindex mgas
+Enable the use of assembler directives only GAS understands.
+
+@item -mschedule=@var{cpu-type}
+@opindex mschedule
+Schedule code according to the constraints for the machine type
+@var{cpu-type}.  The choices for @var{cpu-type} are @samp{700}
+@samp{7100}, @samp{7100LC}, @samp{7200}, @samp{7300} and @samp{8000}.  Refer
+to @file{/usr/lib/sched.models} on an HP-UX system to determine the
+proper scheduling option for your machine.  The default scheduling is
+@samp{8000}.
+
+@item -mlinker-opt
+@opindex mlinker-opt
+Enable the optimization pass in the HP-UX linker.  Note this makes symbolic
+debugging impossible.  It also triggers a bug in the HP-UX 8 and HP-UX 9
+linkers in which they give bogus error messages when linking some programs.
+
+@item -msoft-float
+@opindex msoft-float
+Generate output containing library calls for floating point.
+@strong{Warning:} the requisite libraries are not available for all HPPA
+targets.  Normally the facilities of the machine's usual C compiler are
+used, but this cannot be done directly in cross-compilation.  You must make
+your own arrangements to provide suitable library functions for
+cross-compilation.
+
+@option{-msoft-float} changes the calling convention in the output file;
+therefore, it is only useful if you compile @emph{all} of a program with
+this option.  In particular, you need to compile @file{libgcc.a}, the
+library that comes with GCC, with @option{-msoft-float} in order for
+this to work.
+
+@item -msio
+@opindex msio
+Generate the predefine, @code{_SIO}, for server IO@.  The default is
+@option{-mwsio}.  This generates the predefines, @code{__hp9000s700},
+@code{__hp9000s700__} and @code{_WSIO}, for workstation IO@.  These
+options are available under HP-UX and HI-UX@.
+
+@item -mgnu-ld
+@opindex gnu-ld
+Use GNU ld specific options.  This passes @option{-shared} to ld when
+building a shared library.  It is the default when GCC is configured,
+explicitly or implicitly, with the GNU linker.  This option does not
+have any affect on which ld is called, it only changes what parameters
+are passed to that ld.  The ld that is called is determined by the
+@option{--with-ld} configure option, GCC's program search path, and
+finally by the user's @env{PATH}.  The linker used by GCC can be printed
+using @samp{which `gcc -print-prog-name=ld`}.  This option is only available
+on the 64 bit HP-UX GCC, i.e.@: configured with @samp{hppa*64*-*-hpux*}.
+
+@item -mhp-ld
+@opindex hp-ld
+Use HP ld specific options.  This passes @option{-b} to ld when building
+a shared library and passes @option{+Accept TypeMismatch} to ld on all
+links.  It is the default when GCC is configured, explicitly or
+implicitly, with the HP linker.  This option does not have any affect on
+which ld is called, it only changes what parameters are passed to that
+ld.  The ld that is called is determined by the @option{--with-ld}
+configure option, GCC's program search path, and finally by the user's
+@env{PATH}.  The linker used by GCC can be printed using @samp{which
+`gcc -print-prog-name=ld`}.  This option is only available on the 64 bit
+HP-UX GCC, i.e.@: configured with @samp{hppa*64*-*-hpux*}.
+
+@item -mlong-calls
+@opindex mno-long-calls
+Generate code that uses long call sequences.  This ensures that a call
+is always able to reach linker generated stubs.  The default is to generate
+long calls only when the distance from the call site to the beginning
+of the function or translation unit, as the case may be, exceeds a
+predefined limit set by the branch type being used.  The limits for
+normal calls are 7,600,000 and 240,000 bytes, respectively for the
+PA 2.0 and PA 1.X architectures.  Sibcalls are always limited at
+240,000 bytes.
+
+Distances are measured from the beginning of functions when using the
+@option{-ffunction-sections} option, or when using the @option{-mgas}
+and @option{-mno-portable-runtime} options together under HP-UX with
+the SOM linker.
+
+It is normally not desirable to use this option as it will degrade
+performance.  However, it may be useful in large applications,
+particularly when partial linking is used to build the application.
+
+The types of long calls used depends on the capabilities of the
+assembler and linker, and the type of code being generated.  The
+impact on systems that support long absolute calls, and long pic
+symbol-difference or pc-relative calls should be relatively small.
+However, an indirect call is used on 32-bit ELF systems in pic code
+and it is quite long.
+
+@item -munix=@var{unix-std}
+@opindex march
+Generate compiler predefines and select a startfile for the specified
+UNIX standard.  The choices for @var{unix-std} are @samp{93}, @samp{95}
+and @samp{98}.  @samp{93} is supported on all HP-UX versions.  @samp{95}
+is available on HP-UX 10.10 and later.  @samp{98} is available on HP-UX
+11.11 and later.  The default values are @samp{93} for HP-UX 10.00,
+@samp{95} for HP-UX 10.10 though to 11.00, and @samp{98} for HP-UX 11.11
+and later.
+
+@option{-munix=93} provides the same predefines as GCC 3.3 and 3.4.
+@option{-munix=95} provides additional predefines for @code{XOPEN_UNIX}
+and @code{_XOPEN_SOURCE_EXTENDED}, and the startfile @file{unix95.o}.
+@option{-munix=98} provides additional predefines for @code{_XOPEN_UNIX},
+@code{_XOPEN_SOURCE_EXTENDED}, @code{_INCLUDE__STDC_A1_SOURCE} and
+@code{_INCLUDE_XOPEN_SOURCE_500}, and the startfile @file{unix98.o}.
+
+It is @emph{important} to note that this option changes the interfaces
+for various library routines.  It also affects the operational behavior
+of the C library.  Thus, @emph{extreme} care is needed in using this
+option.
+
+Library code that is intended to operate with more than one UNIX
+standard must test, set and restore the variable @var{__xpg4_extended_mask}
+as appropriate.  Most GNU software doesn't provide this capability.
+
+@item -nolibdld
+@opindex nolibdld
+Suppress the generation of link options to search libdld.sl when the
+@option{-static} option is specified on HP-UX 10 and later.
+
+@item -static
+@opindex static
+The HP-UX implementation of setlocale in libc has a dependency on
+libdld.sl.  There isn't an archive version of libdld.sl.  Thus,
+when the @option{-static} option is specified, special link options
+are needed to resolve this dependency.
+
+On HP-UX 10 and later, the GCC driver adds the necessary options to
+link with libdld.sl when the @option{-static} option is specified.
+This causes the resulting binary to be dynamic.  On the 64-bit port,
+the linkers generate dynamic binaries by default in any case.  The
+@option{-nolibdld} option can be used to prevent the GCC driver from
+adding these link options.
+
+@item -threads
+@opindex threads
+Add support for multithreading with the @dfn{dce thread} library
+under HP-UX@.  This option sets flags for both the preprocessor and
+linker.
+@end table
+
+@node i386 and x86-64 Options
+@subsection Intel 386 and AMD x86-64 Options
+@cindex i386 Options
+@cindex x86-64 Options
+@cindex Intel 386 Options
+@cindex AMD x86-64 Options
+
+These @samp{-m} options are defined for the i386 and x86-64 family of
+computers:
+
+@table @gcctabopt
+@item -mtune=@var{cpu-type}
+@opindex mtune
+Tune to @var{cpu-type} everything applicable about the generated code, except
+for the ABI and the set of available instructions.  The choices for
+@var{cpu-type} are:
+@table @emph
+@item generic
+Produce code optimized for the most common IA32/AMD64/EM64T processors.
+If you know the CPU on which your code will run, then you should use
+the corresponding @option{-mtune} option instead of
+@option{-mtune=generic}.  But, if you do not know exactly what CPU users
+of your application will have, then you should use this option.
+
+As new processors are deployed in the marketplace, the behavior of this
+option will change.  Therefore, if you upgrade to a newer version of
+GCC, the code generated option will change to reflect the processors
+that were most common when that version of GCC was released.
+
+There is no @option{-march=generic} option because @option{-march}
+indicates the instruction set the compiler can use, and there is no
+generic instruction set applicable to all processors.  In contrast,
+@option{-mtune} indicates the processor (or, in this case, collection of
+processors) for which the code is optimized.
+@item native
+This selects the CPU to tune for at compilation time by determining
+the processor type of the compiling machine.  Using @option{-mtune=native}
+will produce code optimized for the local machine under the constraints
+of the selected instruction set.  Using @option{-march=native} will
+enable all instruction subsets supported by the local machine (hence
+the result might not run on different machines).
+@item i386
+Original Intel's i386 CPU@.
+@item i486
+Intel's i486 CPU@.  (No scheduling is implemented for this chip.)
+@item i586, pentium
+Intel Pentium CPU with no MMX support.
+@item pentium-mmx
+Intel PentiumMMX CPU based on Pentium core with MMX instruction set support.
+@item pentiumpro
+Intel PentiumPro CPU@.
+@item i686
+Same as @code{generic}, but when used as @code{march} option, PentiumPro
+instruction set will be used, so the code will run on all i686 family chips.
+@item pentium2
+Intel Pentium2 CPU based on PentiumPro core with MMX instruction set support.
+@item pentium3, pentium3m
+Intel Pentium3 CPU based on PentiumPro core with MMX and SSE instruction set
+support.
+@item pentium-m
+Low power version of Intel Pentium3 CPU with MMX, SSE and SSE2 instruction set
+support.  Used by Centrino notebooks.
+@item pentium4, pentium4m
+Intel Pentium4 CPU with MMX, SSE and SSE2 instruction set support.
+@item prescott
+Improved version of Intel Pentium4 CPU with MMX, SSE, SSE2 and SSE3 instruction
+set support.
+@item nocona
+Improved version of Intel Pentium4 CPU with 64-bit extensions, MMX, SSE,
+SSE2 and SSE3 instruction set support.
+@item core2
+Intel Core2 CPU with 64-bit extensions, MMX, SSE, SSE2, SSE3 and SSSE3
+instruction set support.
+@item k6
+AMD K6 CPU with MMX instruction set support.
+@item k6-2, k6-3
+Improved versions of AMD K6 CPU with MMX and 3dNOW!@: instruction set support.
+@item athlon, athlon-tbird
+AMD Athlon CPU with MMX, 3dNOW!, enhanced 3dNOW!@: and SSE prefetch instructions
+support.
+@item athlon-4, athlon-xp, athlon-mp
+Improved AMD Athlon CPU with MMX, 3dNOW!, enhanced 3dNOW!@: and full SSE
+instruction set support.
+@item k8, opteron, athlon64, athlon-fx
+AMD K8 core based CPUs with x86-64 instruction set support.  (This supersets
+MMX, SSE, SSE2, 3dNOW!, enhanced 3dNOW!@: and 64-bit instruction set extensions.)
+@item k8-sse3, opteron-sse3, athlon64-sse3
+Improved versions of k8, opteron and athlon64 with SSE3 instruction set support.
+@item amdfam10, barcelona
+AMD Family 10h core based CPUs with x86-64 instruction set support.  (This
+supersets MMX, SSE, SSE2, SSE3, SSE4A, 3dNOW!, enhanced 3dNOW!, ABM and 64-bit
+instruction set extensions.)
+@item winchip-c6
+IDT Winchip C6 CPU, dealt in same way as i486 with additional MMX instruction
+set support.
+@item winchip2
+IDT Winchip2 CPU, dealt in same way as i486 with additional MMX and 3dNOW!@:
+instruction set support.
+@item c3
+Via C3 CPU with MMX and 3dNOW!@: instruction set support.  (No scheduling is
+implemented for this chip.)
+@item c3-2
+Via C3-2 CPU with MMX and SSE instruction set support.  (No scheduling is
+implemented for this chip.)
+@item geode
+Embedded AMD CPU with MMX and 3dNOW! instruction set support.
+@end table
+
+While picking a specific @var{cpu-type} will schedule things appropriately
+for that particular chip, the compiler will not generate any code that
+does not run on the i386 without the @option{-march=@var{cpu-type}} option
+being used.
+
+@item -march=@var{cpu-type}
+@opindex march
+Generate instructions for the machine type @var{cpu-type}.  The choices
+for @var{cpu-type} are the same as for @option{-mtune}.  Moreover,
+specifying @option{-march=@var{cpu-type}} implies @option{-mtune=@var{cpu-type}}.
+
+@item -mcpu=@var{cpu-type}
+@opindex mcpu
+A deprecated synonym for @option{-mtune}.
+
+@item -mfpmath=@var{unit}
+@opindex march
+Generate floating point arithmetics for selected unit @var{unit}.  The choices
+for @var{unit} are:
+
+@table @samp
+@item 387
+Use the standard 387 floating point coprocessor present majority of chips and
+emulated otherwise.  Code compiled with this option will run almost everywhere.
+The temporary results are computed in 80bit precision instead of precision
+specified by the type resulting in slightly different results compared to most
+of other chips.  See @option{-ffloat-store} for more detailed description.
+
+This is the default choice for i386 compiler.
+
+@item sse
+Use scalar floating point instructions present in the SSE instruction set.
+This instruction set is supported by Pentium3 and newer chips, in the AMD line
+by Athlon-4, Athlon-xp and Athlon-mp chips.  The earlier version of SSE
+instruction set supports only single precision arithmetics, thus the double and
+extended precision arithmetics is still done using 387.  Later version, present
+only in Pentium4 and the future AMD x86-64 chips supports double precision
+arithmetics too.
+
+For the i386 compiler, you need to use @option{-march=@var{cpu-type}}, @option{-msse}
+or @option{-msse2} switches to enable SSE extensions and make this option
+effective.  For the x86-64 compiler, these extensions are enabled by default.
+
+The resulting code should be considerably faster in the majority of cases and avoid
+the numerical instability problems of 387 code, but may break some existing
+code that expects temporaries to be 80bit.
+
+This is the default choice for the x86-64 compiler.
+
+@item sse,387
+@itemx sse+387
+@itemx both
+Attempt to utilize both instruction sets at once.  This effectively double the
+amount of available registers and on chips with separate execution units for
+387 and SSE the execution resources too.  Use this option with care, as it is
+still experimental, because the GCC register allocator does not model separate
+functional units well resulting in instable performance.
+@end table
+
+@item -masm=@var{dialect}
+@opindex masm=@var{dialect}
+Output asm instructions using selected @var{dialect}.  Supported
+choices are @samp{intel} or @samp{att} (the default one).  Darwin does
+not support @samp{intel}.
+
+@item -mieee-fp
+@itemx -mno-ieee-fp
+@opindex mieee-fp
+@opindex mno-ieee-fp
+Control whether or not the compiler uses IEEE floating point
+comparisons.  These handle correctly the case where the result of a
+comparison is unordered.
+
+@item -msoft-float
+@opindex msoft-float
+Generate output containing library calls for floating point.
+@strong{Warning:} the requisite libraries are not part of GCC@.
+Normally the facilities of the machine's usual C compiler are used, but
+this can't be done directly in cross-compilation.  You must make your
+own arrangements to provide suitable library functions for
+cross-compilation.
+
+On machines where a function returns floating point results in the 80387
+register stack, some floating point opcodes may be emitted even if
+@option{-msoft-float} is used.
+
+@item -mno-fp-ret-in-387
+@opindex mno-fp-ret-in-387
+Do not use the FPU registers for return values of functions.
+
+The usual calling convention has functions return values of types
+@code{float} and @code{double} in an FPU register, even if there
+is no FPU@.  The idea is that the operating system should emulate
+an FPU@.
+
+The option @option{-mno-fp-ret-in-387} causes such values to be returned
+in ordinary CPU registers instead.
+
+@item -mno-fancy-math-387
+@opindex mno-fancy-math-387
+Some 387 emulators do not support the @code{sin}, @code{cos} and
+@code{sqrt} instructions for the 387.  Specify this option to avoid
+generating those instructions.  This option is the default on FreeBSD,
+OpenBSD and NetBSD@.  This option is overridden when @option{-march}
+indicates that the target cpu will always have an FPU and so the
+instruction will not need emulation.  As of revision 2.6.1, these
+instructions are not generated unless you also use the
+@option{-funsafe-math-optimizations} switch.
+
+@item -malign-double
+@itemx -mno-align-double
+@opindex malign-double
+@opindex mno-align-double
+Control whether GCC aligns @code{double}, @code{long double}, and
+@code{long long} variables on a two word boundary or a one word
+boundary.  Aligning @code{double} variables on a two word boundary will
+produce code that runs somewhat faster on a @samp{Pentium} at the
+expense of more memory.
+
+On x86-64, @option{-malign-double} is enabled by default.
+
+@strong{Warning:} if you use the @option{-malign-double} switch,
+structures containing the above types will be aligned differently than
+the published application binary interface specifications for the 386
+and will not be binary compatible with structures in code compiled
+without that switch.
+
+@item -m96bit-long-double
+@itemx -m128bit-long-double
+@opindex m96bit-long-double
+@opindex m128bit-long-double
+These switches control the size of @code{long double} type.  The i386
+application binary interface specifies the size to be 96 bits,
+so @option{-m96bit-long-double} is the default in 32 bit mode.
+
+Modern architectures (Pentium and newer) would prefer @code{long double}
+to be aligned to an 8 or 16 byte boundary.  In arrays or structures
+conforming to the ABI, this would not be possible.  So specifying a
+@option{-m128bit-long-double} will align @code{long double}
+to a 16 byte boundary by padding the @code{long double} with an additional
+32 bit zero.
+
+In the x86-64 compiler, @option{-m128bit-long-double} is the default choice as
+its ABI specifies that @code{long double} is to be aligned on 16 byte boundary.
+
+Notice that neither of these options enable any extra precision over the x87
+standard of 80 bits for a @code{long double}.
+
+@strong{Warning:} if you override the default value for your target ABI, the
+structures and arrays containing @code{long double} variables will change
+their size as well as function calling convention for function taking
+@code{long double} will be modified.  Hence they will not be binary
+compatible with arrays or structures in code compiled without that switch.
+
+@item -mlarge-data-threshold=@var{number}
+@opindex mlarge-data-threshold=@var{number}
+When @option{-mcmodel=medium} is specified, the data greater than
+@var{threshold} are placed in large data section.  This value must be the
+same across all object linked into the binary and defaults to 65535.
+
+@item -mrtd
+@opindex mrtd
+Use a different function-calling convention, in which functions that
+take a fixed number of arguments return with the @code{ret} @var{num}
+instruction, which pops their arguments while returning.  This saves one
+instruction in the caller since there is no need to pop the arguments
+there.
+
+You can specify that an individual function is called with this calling
+sequence with the function attribute @samp{stdcall}.  You can also
+override the @option{-mrtd} option by using the function attribute
+@samp{cdecl}.  @xref{Function Attributes}.
+
+@strong{Warning:} this calling convention is incompatible with the one
+normally used on Unix, so you cannot use it if you need to call
+libraries compiled with the Unix compiler.
+
+Also, you must provide function prototypes for all functions that
+take variable numbers of arguments (including @code{printf});
+otherwise incorrect code will be generated for calls to those
+functions.
+
+In addition, seriously incorrect code will result if you call a
+function with too many arguments.  (Normally, extra arguments are
+harmlessly ignored.)
+
+@item -mregparm=@var{num}
+@opindex mregparm
+Control how many registers are used to pass integer arguments.  By
+default, no registers are used to pass arguments, and at most 3
+registers can be used.  You can control this behavior for a specific
+function by using the function attribute @samp{regparm}.
+@xref{Function Attributes}.
+
+@strong{Warning:} if you use this switch, and
+@var{num} is nonzero, then you must build all modules with the same
+value, including any libraries.  This includes the system libraries and
+startup modules.
+
+@item -msseregparm
+@opindex msseregparm
+Use SSE register passing conventions for float and double arguments
+and return values.  You can control this behavior for a specific
+function by using the function attribute @samp{sseregparm}.
+@xref{Function Attributes}.
+
+@strong{Warning:} if you use this switch then you must build all
+modules with the same value, including any libraries.  This includes
+the system libraries and startup modules.
+
+@item -mpc32
+@itemx -mpc64
+@itemx -mpc80
+@opindex mpc32
+@opindex mpc64
+@opindex mpc80
+
+Set 80387 floating-point precision to 32, 64 or 80 bits.  When @option{-mpc32}
+is specified, the significands of results of floating-point operations are
+rounded to 24 bits (single precision); @option{-mpc64} rounds the
+significands of results of floating-point operations to 53 bits (double
+precision) and @option{-mpc80} rounds the significands of results of
+floating-point operations to 64 bits (extended double precision), which is
+the default.  When this option is used, floating-point operations in higher
+precisions are not available to the programmer without setting the FPU
+control word explicitly.
+
+Setting the rounding of floating-point operations to less than the default
+80 bits can speed some programs by 2% or more.  Note that some mathematical
+libraries assume that extended precision (80 bit) floating-point operations
+are enabled by default; routines in such libraries could suffer significant
+loss of accuracy, typically through so-called "catastrophic cancellation",
+when this option is used to set the precision to less than extended precision. 
+
+@item -mstackrealign
+@opindex mstackrealign
+Realign the stack at entry.  On the Intel x86, the @option{-mstackrealign}
+option will generate an alternate prologue and epilogue that realigns the
+runtime stack if necessary.  This supports mixing legacy codes that keep
+a 4-byte aligned stack with modern codes that keep a 16-byte stack for
+SSE compatibility.  See also the attribute @code{force_align_arg_pointer},
+applicable to individual functions.
+
+@item -mpreferred-stack-boundary=@var{num}
+@opindex mpreferred-stack-boundary
+Attempt to keep the stack boundary aligned to a 2 raised to @var{num}
+byte boundary.  If @option{-mpreferred-stack-boundary} is not specified,
+the default is 4 (16 bytes or 128 bits).
+
+@item -mincoming-stack-boundary=@var{num}
+@opindex mincoming-stack-boundary
+Assume the incoming stack is aligned to a 2 raised to @var{num} byte
+boundary.  If @option{-mincoming-stack-boundary} is not specified,
+the one specified by @option{-mpreferred-stack-boundary} will be used.
+
+On Pentium and PentiumPro, @code{double} and @code{long double} values
+should be aligned to an 8 byte boundary (see @option{-malign-double}) or
+suffer significant run time performance penalties.  On Pentium III, the
+Streaming SIMD Extension (SSE) data type @code{__m128} may not work
+properly if it is not 16 byte aligned.
+
+To ensure proper alignment of this values on the stack, the stack boundary
+must be as aligned as that required by any value stored on the stack.
+Further, every function must be generated such that it keeps the stack
+aligned.  Thus calling a function compiled with a higher preferred
+stack boundary from a function compiled with a lower preferred stack
+boundary will most likely misalign the stack.  It is recommended that
+libraries that use callbacks always use the default setting.
+
+This extra alignment does consume extra stack space, and generally
+increases code size.  Code that is sensitive to stack space usage, such
+as embedded systems and operating system kernels, may want to reduce the
+preferred alignment to @option{-mpreferred-stack-boundary=2}.
+
+@item -mmmx
+@itemx -mno-mmx
+@itemx -msse
+@itemx -mno-sse
+@itemx -msse2
+@itemx -mno-sse2
+@itemx -msse3
+@itemx -mno-sse3
+@itemx -mssse3
+@itemx -mno-ssse3
+@itemx -msse4.1
+@itemx -mno-sse4.1
+@itemx -msse4.2
+@itemx -mno-sse4.2
+@itemx -msse4
+@itemx -mno-sse4
+@itemx -mavx
+@itemx -mno-avx
+@itemx -maes
+@itemx -mno-aes
+@itemx -mpclmul
+@itemx -mno-pclmul
+@itemx -msse4a
+@itemx -mno-sse4a
+@itemx -msse5
+@itemx -mno-sse5
+@itemx -m3dnow
+@itemx -mno-3dnow
+@itemx -mpopcnt
+@itemx -mno-popcnt
+@itemx -mabm
+@itemx -mno-abm
+@opindex mmmx
+@opindex mno-mmx
+@opindex msse
+@opindex mno-sse
+@opindex m3dnow
+@opindex mno-3dnow
+These switches enable or disable the use of instructions in the MMX,
+SSE, SSE2, SSE3, SSSE3, SSE4.1, AVX, AES, PCLMUL, SSE4A, SSE5, ABM or
+3DNow!@: extended instruction sets.
+These extensions are also available as built-in functions: see
+@ref{X86 Built-in Functions}, for details of the functions enabled and
+disabled by these switches.
+
+To have SSE/SSE2 instructions generated automatically from floating-point
+code (as opposed to 387 instructions), see @option{-mfpmath=sse}.
+
+GCC depresses SSEx instructions when @option{-mavx} is used. Instead, it
+generates new AVX instructions or AVX equivalence for all SSEx instructions
+when needed.
+
+These options will enable GCC to use these extended instructions in
+generated code, even without @option{-mfpmath=sse}.  Applications which
+perform runtime CPU detection must compile separate files for each
+supported architecture, using the appropriate flags.  In particular,
+the file containing the CPU detection code should be compiled without
+these options.
+
+@item -mcld
+@opindex mcld
+This option instructs GCC to emit a @code{cld} instruction in the prologue
+of functions that use string instructions.  String instructions depend on
+the DF flag to select between autoincrement or autodecrement mode.  While the
+ABI specifies the DF flag to be cleared on function entry, some operating
+systems violate this specification by not clearing the DF flag in their
+exception dispatchers.  The exception handler can be invoked with the DF flag
+set which leads to wrong direction mode, when string instructions are used.
+This option can be enabled by default on 32-bit x86 targets by configuring
+GCC with the @option{--enable-cld} configure option.  Generation of @code{cld}
+instructions can be suppressed with the @option{-mno-cld} compiler option
+in this case.
+
+@item -mcx16
+@opindex mcx16
+This option will enable GCC to use CMPXCHG16B instruction in generated code.
+CMPXCHG16B allows for atomic operations on 128-bit double quadword (or oword)
+data types.  This is useful for high resolution counters that could be updated
+by multiple processors (or cores).  This instruction is generated as part of
+atomic built-in functions: see @ref{Atomic Builtins} for details.
+
+@item -msahf
+@opindex msahf
+This option will enable GCC to use SAHF instruction in generated 64-bit code.
+Early Intel CPUs with Intel 64 lacked LAHF and SAHF instructions supported
+by AMD64 until introduction of Pentium 4 G1 step in December 2005.  LAHF and
+SAHF are load and store instructions, respectively, for certain status flags.
+In 64-bit mode, SAHF instruction is used to optimize @code{fmod}, @code{drem}
+or @code{remainder} built-in functions: see @ref{Other Builtins} for details.
+
+@item -mrecip
+@opindex mrecip
+This option will enable GCC to use RCPSS and RSQRTSS instructions (and their
+vectorized variants RCPPS and RSQRTPS) with an additional Newton-Raphson step
+to increase precision instead of DIVSS and SQRTSS (and their vectorized
+variants) for single precision floating point arguments.  These instructions
+are generated only when @option{-funsafe-math-optimizations} is enabled
+together with @option{-finite-math-only} and @option{-fno-trapping-math}.
+Note that while the throughput of the sequence is higher than the throughput
+of the non-reciprocal instruction, the precision of the sequence can be
+decreased by up to 2 ulp (i.e. the inverse of 1.0 equals 0.99999994).
+
+@item -mveclibabi=@var{type}
+@opindex mveclibabi
+Specifies the ABI type to use for vectorizing intrinsics using an
+external library.  Supported types are @code{svml} for the Intel short
+vector math library and @code{acml} for the AMD math core library style
+of interfacing.  GCC will currently emit calls to @code{vmldExp2},
+@code{vmldLn2}, @code{vmldLog102}, @code{vmldLog102}, @code{vmldPow2},
+@code{vmldTanh2}, @code{vmldTan2}, @code{vmldAtan2}, @code{vmldAtanh2},
+@code{vmldCbrt2}, @code{vmldSinh2}, @code{vmldSin2}, @code{vmldAsinh2},
+@code{vmldAsin2}, @code{vmldCosh2}, @code{vmldCos2}, @code{vmldAcosh2},
+@code{vmldAcos2}, @code{vmlsExp4}, @code{vmlsLn4}, @code{vmlsLog104},
+@code{vmlsLog104}, @code{vmlsPow4}, @code{vmlsTanh4}, @code{vmlsTan4},
+@code{vmlsAtan4}, @code{vmlsAtanh4}, @code{vmlsCbrt4}, @code{vmlsSinh4},
+@code{vmlsSin4}, @code{vmlsAsinh4}, @code{vmlsAsin4}, @code{vmlsCosh4},
+@code{vmlsCos4}, @code{vmlsAcosh4} and @code{vmlsAcos4} for corresponding
+function type when @option{-mveclibabi=svml} is used and @code{__vrd2_sin},
+@code{__vrd2_cos}, @code{__vrd2_exp}, @code{__vrd2_log}, @code{__vrd2_log2},
+@code{__vrd2_log10}, @code{__vrs4_sinf}, @code{__vrs4_cosf},
+@code{__vrs4_expf}, @code{__vrs4_logf}, @code{__vrs4_log2f},
+@code{__vrs4_log10f} and @code{__vrs4_powf} for corresponding function type
+when @option{-mveclibabi=acml} is used. Both @option{-ftree-vectorize} and
+@option{-funsafe-math-optimizations} have to be enabled. A SVML or ACML ABI
+compatible library will have to be specified at link time.
+
+@item -mpush-args
+@itemx -mno-push-args
+@opindex mpush-args
+@opindex mno-push-args
+Use PUSH operations to store outgoing parameters.  This method is shorter
+and usually equally fast as method using SUB/MOV operations and is enabled
+by default.  In some cases disabling it may improve performance because of
+improved scheduling and reduced dependencies.
+
+@item -maccumulate-outgoing-args
+@opindex maccumulate-outgoing-args
+If enabled, the maximum amount of space required for outgoing arguments will be
+computed in the function prologue.  This is faster on most modern CPUs
+because of reduced dependencies, improved scheduling and reduced stack usage
+when preferred stack boundary is not equal to 2.  The drawback is a notable
+increase in code size.  This switch implies @option{-mno-push-args}.
+
+@item -mthreads
+@opindex mthreads
+Support thread-safe exception handling on @samp{Mingw32}.  Code that relies
+on thread-safe exception handling must compile and link all code with the
+@option{-mthreads} option.  When compiling, @option{-mthreads} defines
+@option{-D_MT}; when linking, it links in a special thread helper library
+@option{-lmingwthrd} which cleans up per thread exception handling data.
+
+@item -mno-align-stringops
+@opindex mno-align-stringops
+Do not align destination of inlined string operations.  This switch reduces
+code size and improves performance in case the destination is already aligned,
+but GCC doesn't know about it.
+
+@item -minline-all-stringops
+@opindex minline-all-stringops
+By default GCC inlines string operations only when destination is known to be
+aligned at least to 4 byte boundary.  This enables more inlining, increase code
+size, but may improve performance of code that depends on fast memcpy, strlen
+and memset for short lengths.
+
+@item -minline-stringops-dynamically
+@opindex minline-stringops-dynamically
+For string operation of unknown size, inline runtime checks so for small
+blocks inline code is used, while for large blocks library call is used.
+
+@item -mstringop-strategy=@var{alg}
+@opindex mstringop-strategy=@var{alg}
+Overwrite internal decision heuristic about particular algorithm to inline
+string operation with.  The allowed values are @code{rep_byte},
+@code{rep_4byte}, @code{rep_8byte} for expanding using i386 @code{rep} prefix
+of specified size, @code{byte_loop}, @code{loop}, @code{unrolled_loop} for
+expanding inline loop, @code{libcall} for always expanding library call.
+
+@item -momit-leaf-frame-pointer
+@opindex momit-leaf-frame-pointer
+Don't keep the frame pointer in a register for leaf functions.  This
+avoids the instructions to save, set up and restore frame pointers and
+makes an extra register available in leaf functions.  The option
+@option{-fomit-frame-pointer} removes the frame pointer for all functions
+which might make debugging harder.
+
+@item -mtls-direct-seg-refs
+@itemx -mno-tls-direct-seg-refs
+@opindex mtls-direct-seg-refs
+Controls whether TLS variables may be accessed with offsets from the
+TLS segment register (@code{%gs} for 32-bit, @code{%fs} for 64-bit),
+or whether the thread base pointer must be added.  Whether or not this
+is legal depends on the operating system, and whether it maps the
+segment to cover the entire TLS area.
+
+For systems that use GNU libc, the default is on.
+
+@item -mfused-madd
+@itemx -mno-fused-madd
+@opindex mfused-madd
+Enable automatic generation of fused floating point multiply-add instructions
+if the ISA supports such instructions.  The -mfused-madd option is on by
+default.  The fused multiply-add instructions have a different
+rounding behavior compared to executing a multiply followed by an add.
+
+@item -msse2avx
+@itemx -mno-sse2avx
+@opindex msse2avx
+Specify that the assembler should encode SSE instructions with VEX
+prefix.  The option @option{-mavx} turns this on by default.
+@end table
+
+These @samp{-m} switches are supported in addition to the above
+on AMD x86-64 processors in 64-bit environments.
+
+@table @gcctabopt
+@item -m32
+@itemx -m64
+@opindex m32
+@opindex m64
+Generate code for a 32-bit or 64-bit environment.
+The 32-bit environment sets int, long and pointer to 32 bits and
+generates code that runs on any i386 system.
+The 64-bit environment sets int to 32 bits and long and pointer
+to 64 bits and generates code for AMD's x86-64 architecture. For
+darwin only the -m64 option turns off the @option{-fno-pic} and
+@option{-mdynamic-no-pic} options.
+
+@item -mno-red-zone
+@opindex no-red-zone
+Do not use a so called red zone for x86-64 code.  The red zone is mandated
+by the x86-64 ABI, it is a 128-byte area beyond the location of the
+stack pointer that will not be modified by signal or interrupt handlers
+and therefore can be used for temporary data without adjusting the stack
+pointer.  The flag @option{-mno-red-zone} disables this red zone.
+
+@item -mcmodel=small
+@opindex mcmodel=small
+Generate code for the small code model: the program and its symbols must
+be linked in the lower 2 GB of the address space.  Pointers are 64 bits.
+Programs can be statically or dynamically linked.  This is the default
+code model.
+
+@item -mcmodel=kernel
+@opindex mcmodel=kernel
+Generate code for the kernel code model.  The kernel runs in the
+negative 2 GB of the address space.
+This model has to be used for Linux kernel code.
+
+@item -mcmodel=medium
+@opindex mcmodel=medium
+Generate code for the medium model: The program is linked in the lower 2
+GB of the address space.  Small symbols are also placed there.  Symbols
+with sizes larger than @option{-mlarge-data-threshold} are put into
+large data or bss sections and can be located above 2GB.  Programs can
+be statically or dynamically linked.
+
+@item -mcmodel=large
+@opindex mcmodel=large
+Generate code for the large model: This model makes no assumptions
+about addresses and sizes of sections.
+@end table
+
+@node IA-64 Options
+@subsection IA-64 Options
+@cindex IA-64 Options
+
+These are the @samp{-m} options defined for the Intel IA-64 architecture.
+
+@table @gcctabopt
+@item -mbig-endian
+@opindex mbig-endian
+Generate code for a big endian target.  This is the default for HP-UX@.
+
+@item -mlittle-endian
+@opindex mlittle-endian
+Generate code for a little endian target.  This is the default for AIX5
+and GNU/Linux.
+
+@item -mgnu-as
+@itemx -mno-gnu-as
+@opindex mgnu-as
+@opindex mno-gnu-as
+Generate (or don't) code for the GNU assembler.  This is the default.
+@c Also, this is the default if the configure option @option{--with-gnu-as}
+@c is used.
+
+@item -mgnu-ld
+@itemx -mno-gnu-ld
+@opindex mgnu-ld
+@opindex mno-gnu-ld
+Generate (or don't) code for the GNU linker.  This is the default.
+@c Also, this is the default if the configure option @option{--with-gnu-ld}
+@c is used.
+
+@item -mno-pic
+@opindex mno-pic
+Generate code that does not use a global pointer register.  The result
+is not position independent code, and violates the IA-64 ABI@.
+
+@item -mvolatile-asm-stop
+@itemx -mno-volatile-asm-stop
+@opindex mvolatile-asm-stop
+@opindex mno-volatile-asm-stop
+Generate (or don't) a stop bit immediately before and after volatile asm
+statements.
+
+@item -mregister-names
+@itemx -mno-register-names
+@opindex mregister-names
+@opindex mno-register-names
+Generate (or don't) @samp{in}, @samp{loc}, and @samp{out} register names for
+the stacked registers.  This may make assembler output more readable.
+
+@item -mno-sdata
+@itemx -msdata
+@opindex mno-sdata
+@opindex msdata
+Disable (or enable) optimizations that use the small data section.  This may
+be useful for working around optimizer bugs.
+
+@item -mconstant-gp
+@opindex mconstant-gp
+Generate code that uses a single constant global pointer value.  This is
+useful when compiling kernel code.
+
+@item -mauto-pic
+@opindex mauto-pic
+Generate code that is self-relocatable.  This implies @option{-mconstant-gp}.
+This is useful when compiling firmware code.
+
+@item -minline-float-divide-min-latency
+@opindex minline-float-divide-min-latency
+Generate code for inline divides of floating point values
+using the minimum latency algorithm.
+
+@item -minline-float-divide-max-throughput
+@opindex minline-float-divide-max-throughput
+Generate code for inline divides of floating point values
+using the maximum throughput algorithm.
+
+@item -minline-int-divide-min-latency
+@opindex minline-int-divide-min-latency
+Generate code for inline divides of integer values
+using the minimum latency algorithm.
+
+@item -minline-int-divide-max-throughput
+@opindex minline-int-divide-max-throughput
+Generate code for inline divides of integer values
+using the maximum throughput algorithm.
+
+@item -minline-sqrt-min-latency
+@opindex minline-sqrt-min-latency
+Generate code for inline square roots
+using the minimum latency algorithm.
+
+@item -minline-sqrt-max-throughput
+@opindex minline-sqrt-max-throughput
+Generate code for inline square roots
+using the maximum throughput algorithm.
+
+@item -mno-dwarf2-asm
+@itemx -mdwarf2-asm
+@opindex mno-dwarf2-asm
+@opindex mdwarf2-asm
+Don't (or do) generate assembler code for the DWARF2 line number debugging
+info.  This may be useful when not using the GNU assembler.
+
+@item -mearly-stop-bits
+@itemx -mno-early-stop-bits
+@opindex mearly-stop-bits
+@opindex mno-early-stop-bits
+Allow stop bits to be placed earlier than immediately preceding the
+instruction that triggered the stop bit.  This can improve instruction
+scheduling, but does not always do so.
+
+@item -mfixed-range=@var{register-range}
+@opindex mfixed-range
+Generate code treating the given register range as fixed registers.
+A fixed register is one that the register allocator can not use.  This is
+useful when compiling kernel code.  A register range is specified as
+two registers separated by a dash.  Multiple register ranges can be
+specified separated by a comma.
+
+@item -mtls-size=@var{tls-size}
+@opindex mtls-size
+Specify bit size of immediate TLS offsets.  Valid values are 14, 22, and
+64.
+
+@item -mtune=@var{cpu-type}
+@opindex mtune
+Tune the instruction scheduling for a particular CPU, Valid values are
+itanium, itanium1, merced, itanium2, and mckinley.
+
+@item -mt
+@itemx -pthread
+@opindex mt
+@opindex pthread
+Add support for multithreading using the POSIX threads library.  This
+option sets flags for both the preprocessor and linker.  It does
+not affect the thread safety of object code produced by the compiler or
+that of libraries supplied with it.  These are HP-UX specific flags.
+
+@item -milp32
+@itemx -mlp64
+@opindex milp32
+@opindex mlp64
+Generate code for a 32-bit or 64-bit environment.
+The 32-bit environment sets int, long and pointer to 32 bits.
+The 64-bit environment sets int to 32 bits and long and pointer
+to 64 bits.  These are HP-UX specific flags.
+
+@item -mno-sched-br-data-spec
+@itemx -msched-br-data-spec
+@opindex mno-sched-br-data-spec
+@opindex msched-br-data-spec
+(Dis/En)able data speculative scheduling before reload.
+This will result in generation of the ld.a instructions and
+the corresponding check instructions (ld.c / chk.a).
+The default is 'disable'.
+
+@item -msched-ar-data-spec
+@itemx -mno-sched-ar-data-spec
+@opindex msched-ar-data-spec
+@opindex mno-sched-ar-data-spec
+(En/Dis)able data speculative scheduling after reload.
+This will result in generation of the ld.a instructions and
+the corresponding check instructions (ld.c / chk.a).
+The default is 'enable'.
+
+@item -mno-sched-control-spec
+@itemx -msched-control-spec
+@opindex mno-sched-control-spec
+@opindex msched-control-spec
+(Dis/En)able control speculative scheduling.  This feature is
+available only during region scheduling (i.e.@: before reload).
+This will result in generation of the ld.s instructions and
+the corresponding check instructions chk.s .
+The default is 'disable'.
+
+@item -msched-br-in-data-spec
+@itemx -mno-sched-br-in-data-spec
+@opindex msched-br-in-data-spec
+@opindex mno-sched-br-in-data-spec
+(En/Dis)able speculative scheduling of the instructions that
+are dependent on the data speculative loads before reload.
+This is effective only with @option{-msched-br-data-spec} enabled.
+The default is 'enable'.
+
+@item -msched-ar-in-data-spec
+@itemx -mno-sched-ar-in-data-spec
+@opindex msched-ar-in-data-spec
+@opindex mno-sched-ar-in-data-spec
+(En/Dis)able speculative scheduling of the instructions that
+are dependent on the data speculative loads after reload.
+This is effective only with @option{-msched-ar-data-spec} enabled.
+The default is 'enable'.
+
+@item -msched-in-control-spec
+@itemx -mno-sched-in-control-spec
+@opindex msched-in-control-spec
+@opindex mno-sched-in-control-spec
+(En/Dis)able speculative scheduling of the instructions that
+are dependent on the control speculative loads.
+This is effective only with @option{-msched-control-spec} enabled.
+The default is 'enable'.
+
+@item -msched-ldc
+@itemx -mno-sched-ldc
+@opindex msched-ldc
+@opindex mno-sched-ldc
+(En/Dis)able use of simple data speculation checks ld.c .
+If disabled, only chk.a instructions will be emitted to check
+data speculative loads.
+The default is 'enable'.
+
+@item -mno-sched-control-ldc
+@itemx -msched-control-ldc
+@opindex mno-sched-control-ldc
+@opindex msched-control-ldc
+(Dis/En)able use of ld.c instructions to check control speculative loads.
+If enabled, in case of control speculative load with no speculatively
+scheduled dependent instructions this load will be emitted as ld.sa and
+ld.c will be used to check it.
+The default is 'disable'.
+
+@item -mno-sched-spec-verbose
+@itemx -msched-spec-verbose
+@opindex mno-sched-spec-verbose
+@opindex msched-spec-verbose
+(Dis/En)able printing of the information about speculative motions.
+
+@item -mno-sched-prefer-non-data-spec-insns
+@itemx -msched-prefer-non-data-spec-insns
+@opindex mno-sched-prefer-non-data-spec-insns
+@opindex msched-prefer-non-data-spec-insns
+If enabled, data speculative instructions will be chosen for schedule
+only if there are no other choices at the moment.  This will make
+the use of the data speculation much more conservative.
+The default is 'disable'.
+
+@item -mno-sched-prefer-non-control-spec-insns
+@itemx -msched-prefer-non-control-spec-insns
+@opindex mno-sched-prefer-non-control-spec-insns
+@opindex msched-prefer-non-control-spec-insns
+If enabled, control speculative instructions will be chosen for schedule
+only if there are no other choices at the moment.  This will make
+the use of the control speculation much more conservative.
+The default is 'disable'.
+
+@item -mno-sched-count-spec-in-critical-path
+@itemx -msched-count-spec-in-critical-path
+@opindex mno-sched-count-spec-in-critical-path
+@opindex msched-count-spec-in-critical-path
+If enabled, speculative dependencies will be considered during
+computation of the instructions priorities.  This will make the use of the
+speculation a bit more conservative.
+The default is 'disable'.
+
+@end table
+
+@node M32C Options
+@subsection M32C Options
+@cindex M32C options
+
+@table @gcctabopt
+@item -mcpu=@var{name}
+@opindex mcpu=
+Select the CPU for which code is generated.  @var{name} may be one of
+@samp{r8c} for the R8C/Tiny series, @samp{m16c} for the M16C (up to
+/60) series, @samp{m32cm} for the M16C/80 series, or @samp{m32c} for
+the M32C/80 series.
+
+@item -msim
+@opindex msim
+Specifies that the program will be run on the simulator.  This causes
+an alternate runtime library to be linked in which supports, for
+example, file I/O@.  You must not use this option when generating
+programs that will run on real hardware; you must provide your own
+runtime library for whatever I/O functions are needed.
+
+@item -memregs=@var{number}
+@opindex memregs=
+Specifies the number of memory-based pseudo-registers GCC will use
+during code generation.  These pseudo-registers will be used like real
+registers, so there is a tradeoff between GCC's ability to fit the
+code into available registers, and the performance penalty of using
+memory instead of registers.  Note that all modules in a program must
+be compiled with the same value for this option.  Because of that, you
+must not use this option with the default runtime libraries gcc
+builds.
+
+@end table
+
+@node M32R/D Options
+@subsection M32R/D Options
+@cindex M32R/D options
+
+These @option{-m} options are defined for Renesas M32R/D architectures:
+
+@table @gcctabopt
+@item -m32r2
+@opindex m32r2
+Generate code for the M32R/2@.
+
+@item -m32rx
+@opindex m32rx
+Generate code for the M32R/X@.
+
+@item -m32r
+@opindex m32r
+Generate code for the M32R@.  This is the default.
+
+@item -mmodel=small
+@opindex mmodel=small
+Assume all objects live in the lower 16MB of memory (so that their addresses
+can be loaded with the @code{ld24} instruction), and assume all subroutines
+are reachable with the @code{bl} instruction.
+This is the default.
+
+The addressability of a particular object can be set with the
+@code{model} attribute.
+
+@item -mmodel=medium
+@opindex mmodel=medium
+Assume objects may be anywhere in the 32-bit address space (the compiler
+will generate @code{seth/add3} instructions to load their addresses), and
+assume all subroutines are reachable with the @code{bl} instruction.
+
+@item -mmodel=large
+@opindex mmodel=large
+Assume objects may be anywhere in the 32-bit address space (the compiler
+will generate @code{seth/add3} instructions to load their addresses), and
+assume subroutines may not be reachable with the @code{bl} instruction
+(the compiler will generate the much slower @code{seth/add3/jl}
+instruction sequence).
+
+@item -msdata=none
+@opindex msdata=none
+Disable use of the small data area.  Variables will be put into
+one of @samp{.data}, @samp{bss}, or @samp{.rodata} (unless the
+@code{section} attribute has been specified).
+This is the default.
+
+The small data area consists of sections @samp{.sdata} and @samp{.sbss}.
+Objects may be explicitly put in the small data area with the
+@code{section} attribute using one of these sections.
+
+@item -msdata=sdata
+@opindex msdata=sdata
+Put small global and static data in the small data area, but do not
+generate special code to reference them.
+
+@item -msdata=use
+@opindex msdata=use
+Put small global and static data in the small data area, and generate
+special instructions to reference them.
+
+@item -G @var{num}
+@opindex G
+@cindex smaller data references
+Put global and static objects less than or equal to @var{num} bytes
+into the small data or bss sections instead of the normal data or bss
+sections.  The default value of @var{num} is 8.
+The @option{-msdata} option must be set to one of @samp{sdata} or @samp{use}
+for this option to have any effect.
+
+All modules should be compiled with the same @option{-G @var{num}} value.
+Compiling with different values of @var{num} may or may not work; if it
+doesn't the linker will give an error message---incorrect code will not be
+generated.
+
+@item -mdebug
+@opindex mdebug
+Makes the M32R specific code in the compiler display some statistics
+that might help in debugging programs.
+
+@item -malign-loops
+@opindex malign-loops
+Align all loops to a 32-byte boundary.
+
+@item -mno-align-loops
+@opindex mno-align-loops
+Do not enforce a 32-byte alignment for loops.  This is the default.
+
+@item -missue-rate=@var{number}
+@opindex missue-rate=@var{number}
+Issue @var{number} instructions per cycle.  @var{number} can only be 1
+or 2.
+
+@item -mbranch-cost=@var{number}
+@opindex mbranch-cost=@var{number}
+@var{number} can only be 1 or 2.  If it is 1 then branches will be
+preferred over conditional code, if it is 2, then the opposite will
+apply.
+
+@item -mflush-trap=@var{number}
+@opindex mflush-trap=@var{number}
+Specifies the trap number to use to flush the cache.  The default is
+12.  Valid numbers are between 0 and 15 inclusive.
+
+@item -mno-flush-trap
+@opindex mno-flush-trap
+Specifies that the cache cannot be flushed by using a trap.
+
+@item -mflush-func=@var{name}
+@opindex mflush-func=@var{name}
+Specifies the name of the operating system function to call to flush
+the cache.  The default is @emph{_flush_cache}, but a function call
+will only be used if a trap is not available.
+
+@item -mno-flush-func
+@opindex mno-flush-func
+Indicates that there is no OS function for flushing the cache.
+
+@end table
+
+@node M680x0 Options
+@subsection M680x0 Options
+@cindex M680x0 options
+
+These are the @samp{-m} options defined for M680x0 and ColdFire processors.
+The default settings depend on which architecture was selected when
+the compiler was configured; the defaults for the most common choices
+are given below.
+
+@table @gcctabopt
+@item -march=@var{arch}
+@opindex march
+Generate code for a specific M680x0 or ColdFire instruction set
+architecture.  Permissible values of @var{arch} for M680x0
+architectures are: @samp{68000}, @samp{68010}, @samp{68020},
+@samp{68030}, @samp{68040}, @samp{68060} and @samp{cpu32}.  ColdFire
+architectures are selected according to Freescale's ISA classification
+and the permissible values are: @samp{isaa}, @samp{isaaplus},
+@samp{isab} and @samp{isac}.
+
+gcc defines a macro @samp{__mcf@var{arch}__} whenever it is generating
+code for a ColdFire target.  The @var{arch} in this macro is one of the
+@option{-march} arguments given above.
+
+When used together, @option{-march} and @option{-mtune} select code
+that runs on a family of similar processors but that is optimized
+for a particular microarchitecture.
+
+@item -mcpu=@var{cpu}
+@opindex mcpu
+Generate code for a specific M680x0 or ColdFire processor.
+The M680x0 @var{cpu}s are: @samp{68000}, @samp{68010}, @samp{68020},
+@samp{68030}, @samp{68040}, @samp{68060}, @samp{68302}, @samp{68332}
+and @samp{cpu32}.  The ColdFire @var{cpu}s are given by the table
+below, which also classifies the CPUs into families:
+
+@multitable @columnfractions 0.20 0.80
+@item @strong{Family} @tab @strong{@samp{-mcpu} arguments}
+@item @samp{51qe} @tab @samp{51qe}
+@item @samp{5206} @tab @samp{5202} @samp{5204} @samp{5206}
+@item @samp{5206e} @tab @samp{5206e}
+@item @samp{5208} @tab @samp{5207} @samp{5208}
+@item @samp{5211a} @tab @samp{5210a} @samp{5211a}
+@item @samp{5213} @tab @samp{5211} @samp{5212} @samp{5213}
+@item @samp{5216} @tab @samp{5214} @samp{5216}
+@item @samp{52235} @tab @samp{52230} @samp{52231} @samp{52232} @samp{52233} @samp{52234} @samp{52235}
+@item @samp{5225} @tab @samp{5224} @samp{5225}
+@item @samp{5235} @tab @samp{5232} @samp{5233} @samp{5234} @samp{5235} @samp{523x}
+@item @samp{5249} @tab @samp{5249}
+@item @samp{5250} @tab @samp{5250}
+@item @samp{5271} @tab @samp{5270} @samp{5271}
+@item @samp{5272} @tab @samp{5272}
+@item @samp{5275} @tab @samp{5274} @samp{5275}
+@item @samp{5282} @tab @samp{5280} @samp{5281} @samp{5282} @samp{528x}
+@item @samp{5307} @tab @samp{5307}
+@item @samp{5329} @tab @samp{5327} @samp{5328} @samp{5329} @samp{532x}
+@item @samp{5373} @tab @samp{5372} @samp{5373} @samp{537x}
+@item @samp{5407} @tab @samp{5407}
+@item @samp{5475} @tab @samp{5470} @samp{5471} @samp{5472} @samp{5473} @samp{5474} @samp{5475} @samp{547x} @samp{5480} @samp{5481} @samp{5482} @samp{5483} @samp{5484} @samp{5485}
+@end multitable
+
+@option{-mcpu=@var{cpu}} overrides @option{-march=@var{arch}} if
+@var{arch} is compatible with @var{cpu}.  Other combinations of
+@option{-mcpu} and @option{-march} are rejected.
+
+gcc defines the macro @samp{__mcf_cpu_@var{cpu}} when ColdFire target
+@var{cpu} is selected.  It also defines @samp{__mcf_family_@var{family}},
+where the value of @var{family} is given by the table above.
+
+@item -mtune=@var{tune}
+@opindex mtune
+Tune the code for a particular microarchitecture, within the
+constraints set by @option{-march} and @option{-mcpu}.
+The M680x0 microarchitectures are: @samp{68000}, @samp{68010},
+@samp{68020}, @samp{68030}, @samp{68040}, @samp{68060}
+and @samp{cpu32}.  The ColdFire microarchitectures
+are: @samp{cfv1}, @samp{cfv2}, @samp{cfv3}, @samp{cfv4} and @samp{cfv4e}.
+
+You can also use @option{-mtune=68020-40} for code that needs
+to run relatively well on 68020, 68030 and 68040 targets.
+@option{-mtune=68020-60} is similar but includes 68060 targets
+as well.  These two options select the same tuning decisions as
+@option{-m68020-40} and @option{-m68020-60} respectively.
+
+gcc defines the macros @samp{__mc@var{arch}} and @samp{__mc@var{arch}__}
+when tuning for 680x0 architecture @var{arch}.  It also defines
+@samp{mc@var{arch}} unless either @option{-ansi} or a non-GNU @option{-std}
+option is used.  If gcc is tuning for a range of architectures,
+as selected by @option{-mtune=68020-40} or @option{-mtune=68020-60},
+it defines the macros for every architecture in the range.
+
+gcc also defines the macro @samp{__m@var{uarch}__} when tuning for
+ColdFire microarchitecture @var{uarch}, where @var{uarch} is one
+of the arguments given above.
+
+@item -m68000
+@itemx -mc68000
+@opindex m68000
+@opindex mc68000
+Generate output for a 68000.  This is the default
+when the compiler is configured for 68000-based systems.
+It is equivalent to @option{-march=68000}.
+
+Use this option for microcontrollers with a 68000 or EC000 core,
+including the 68008, 68302, 68306, 68307, 68322, 68328 and 68356.
+
+@item -m68010
+@opindex m68010
+Generate output for a 68010.  This is the default
+when the compiler is configured for 68010-based systems.
+It is equivalent to @option{-march=68010}.
+
+@item -m68020
+@itemx -mc68020
+@opindex m68020
+@opindex mc68020
+Generate output for a 68020.  This is the default
+when the compiler is configured for 68020-based systems.
+It is equivalent to @option{-march=68020}.
+
+@item -m68030
+@opindex m68030
+Generate output for a 68030.  This is the default when the compiler is
+configured for 68030-based systems.  It is equivalent to
+@option{-march=68030}.
+
+@item -m68040
+@opindex m68040
+Generate output for a 68040.  This is the default when the compiler is
+configured for 68040-based systems.  It is equivalent to
+@option{-march=68040}.
+
+This option inhibits the use of 68881/68882 instructions that have to be
+emulated by software on the 68040.  Use this option if your 68040 does not
+have code to emulate those instructions.
+
+@item -m68060
+@opindex m68060
+Generate output for a 68060.  This is the default when the compiler is
+configured for 68060-based systems.  It is equivalent to
+@option{-march=68060}.
+
+This option inhibits the use of 68020 and 68881/68882 instructions that
+have to be emulated by software on the 68060.  Use this option if your 68060
+does not have code to emulate those instructions.
+
+@item -mcpu32
+@opindex mcpu32
+Generate output for a CPU32.  This is the default
+when the compiler is configured for CPU32-based systems.
+It is equivalent to @option{-march=cpu32}.
+
+Use this option for microcontrollers with a
+CPU32 or CPU32+ core, including the 68330, 68331, 68332, 68333, 68334,
+68336, 68340, 68341, 68349 and 68360.
+
+@item -m5200
+@opindex m5200
+Generate output for a 520X ColdFire CPU@.  This is the default
+when the compiler is configured for 520X-based systems.
+It is equivalent to @option{-mcpu=5206}, and is now deprecated
+in favor of that option.
+
+Use this option for microcontroller with a 5200 core, including
+the MCF5202, MCF5203, MCF5204 and MCF5206.
+
+@item -m5206e
+@opindex m5206e
+Generate output for a 5206e ColdFire CPU@.  The option is now
+deprecated in favor of the equivalent @option{-mcpu=5206e}.
+
+@item -m528x
+@opindex m528x
+Generate output for a member of the ColdFire 528X family.
+The option is now deprecated in favor of the equivalent
+@option{-mcpu=528x}.
+
+@item -m5307
+@opindex m5307
+Generate output for a ColdFire 5307 CPU@.  The option is now deprecated
+in favor of the equivalent @option{-mcpu=5307}.
+
+@item -m5407
+@opindex m5407
+Generate output for a ColdFire 5407 CPU@.  The option is now deprecated
+in favor of the equivalent @option{-mcpu=5407}.
+
+@item -mcfv4e
+@opindex mcfv4e
+Generate output for a ColdFire V4e family CPU (e.g.@: 547x/548x).
+This includes use of hardware floating point instructions.
+The option is equivalent to @option{-mcpu=547x}, and is now
+deprecated in favor of that option.
+
+@item -m68020-40
+@opindex m68020-40
+Generate output for a 68040, without using any of the new instructions.
+This results in code which can run relatively efficiently on either a
+68020/68881 or a 68030 or a 68040.  The generated code does use the
+68881 instructions that are emulated on the 68040.
+
+The option is equivalent to @option{-march=68020} @option{-mtune=68020-40}.
+
+@item -m68020-60
+@opindex m68020-60
+Generate output for a 68060, without using any of the new instructions.
+This results in code which can run relatively efficiently on either a
+68020/68881 or a 68030 or a 68040.  The generated code does use the
+68881 instructions that are emulated on the 68060.
+
+The option is equivalent to @option{-march=68020} @option{-mtune=68020-60}.
+
+@item -mhard-float
+@itemx -m68881
+@opindex mhard-float
+@opindex m68881
+Generate floating-point instructions.  This is the default for 68020
+and above, and for ColdFire devices that have an FPU@.  It defines the
+macro @samp{__HAVE_68881__} on M680x0 targets and @samp{__mcffpu__}
+on ColdFire targets.
+
+@item -msoft-float
+@opindex msoft-float
+Do not generate floating-point instructions; use library calls instead.
+This is the default for 68000, 68010, and 68832 targets.  It is also
+the default for ColdFire devices that have no FPU.
+
+@item -mdiv
+@itemx -mno-div
+@opindex mdiv
+@opindex mno-div
+Generate (do not generate) ColdFire hardware divide and remainder
+instructions.  If @option{-march} is used without @option{-mcpu},
+the default is ``on'' for ColdFire architectures and ``off'' for M680x0
+architectures.  Otherwise, the default is taken from the target CPU
+(either the default CPU, or the one specified by @option{-mcpu}).  For
+example, the default is ``off'' for @option{-mcpu=5206} and ``on'' for
+@option{-mcpu=5206e}.
+
+gcc defines the macro @samp{__mcfhwdiv__} when this option is enabled.
+
+@item -mshort
+@opindex mshort
+Consider type @code{int} to be 16 bits wide, like @code{short int}.
+Additionally, parameters passed on the stack are also aligned to a
+16-bit boundary even on targets whose API mandates promotion to 32-bit.
+
+@item -mno-short
+@opindex mno-short
+Do not consider type @code{int} to be 16 bits wide.  This is the default.
+
+@item -mnobitfield
+@itemx -mno-bitfield
+@opindex mnobitfield
+@opindex mno-bitfield
+Do not use the bit-field instructions.  The @option{-m68000}, @option{-mcpu32}
+and @option{-m5200} options imply @w{@option{-mnobitfield}}.
+
+@item -mbitfield
+@opindex mbitfield
+Do use the bit-field instructions.  The @option{-m68020} option implies
+@option{-mbitfield}.  This is the default if you use a configuration
+designed for a 68020.
+
+@item -mrtd
+@opindex mrtd
+Use a different function-calling convention, in which functions
+that take a fixed number of arguments return with the @code{rtd}
+instruction, which pops their arguments while returning.  This
+saves one instruction in the caller since there is no need to pop
+the arguments there.
+
+This calling convention is incompatible with the one normally
+used on Unix, so you cannot use it if you need to call libraries
+compiled with the Unix compiler.
+
+Also, you must provide function prototypes for all functions that
+take variable numbers of arguments (including @code{printf});
+otherwise incorrect code will be generated for calls to those
+functions.
+
+In addition, seriously incorrect code will result if you call a
+function with too many arguments.  (Normally, extra arguments are
+harmlessly ignored.)
+
+The @code{rtd} instruction is supported by the 68010, 68020, 68030,
+68040, 68060 and CPU32 processors, but not by the 68000 or 5200.
+
+@item -mno-rtd
+@opindex mno-rtd
+Do not use the calling conventions selected by @option{-mrtd}.
+This is the default.
+
+@item -malign-int
+@itemx -mno-align-int
+@opindex malign-int
+@opindex mno-align-int
+Control whether GCC aligns @code{int}, @code{long}, @code{long long},
+@code{float}, @code{double}, and @code{long double} variables on a 32-bit
+boundary (@option{-malign-int}) or a 16-bit boundary (@option{-mno-align-int}).
+Aligning variables on 32-bit boundaries produces code that runs somewhat
+faster on processors with 32-bit busses at the expense of more memory.
+
+@strong{Warning:} if you use the @option{-malign-int} switch, GCC will
+align structures containing the above types  differently than
+most published application binary interface specifications for the m68k.
+
+@item -mpcrel
+@opindex mpcrel
+Use the pc-relative addressing mode of the 68000 directly, instead of
+using a global offset table.  At present, this option implies @option{-fpic},
+allowing at most a 16-bit offset for pc-relative addressing.  @option{-fPIC} is
+not presently supported with @option{-mpcrel}, though this could be supported for
+68020 and higher processors.
+
+@item -mno-strict-align
+@itemx -mstrict-align
+@opindex mno-strict-align
+@opindex mstrict-align
+Do not (do) assume that unaligned memory references will be handled by
+the system.
+
+@item -msep-data
+Generate code that allows the data segment to be located in a different
+area of memory from the text segment.  This allows for execute in place in
+an environment without virtual memory management.  This option implies
+@option{-fPIC}.
+
+@item -mno-sep-data
+Generate code that assumes that the data segment follows the text segment.
+This is the default.
+
+@item -mid-shared-library
+Generate code that supports shared libraries via the library ID method.
+This allows for execute in place and shared libraries in an environment
+without virtual memory management.  This option implies @option{-fPIC}.
+
+@item -mno-id-shared-library
+Generate code that doesn't assume ID based shared libraries are being used.
+This is the default.
+
+@item -mshared-library-id=n
+Specified the identification number of the ID based shared library being
+compiled.  Specifying a value of 0 will generate more compact code, specifying
+other values will force the allocation of that number to the current
+library but is no more space or time efficient than omitting this option.
+
+@item -mxgot
+@itemx -mno-xgot
+@opindex mxgot
+@opindex mno-xgot
+When generating position-independent code for ColdFire, generate code
+that works if the GOT has more than 8192 entries.  This code is
+larger and slower than code generated without this option.  On M680x0
+processors, this option is not needed; @option{-fPIC} suffices.
+
+GCC normally uses a single instruction to load values from the GOT@.
+While this is relatively efficient, it only works if the GOT
+is smaller than about 64k.  Anything larger causes the linker
+to report an error such as:
+
+@cindex relocation truncated to fit (ColdFire)
+@smallexample
+relocation truncated to fit: R_68K_GOT16O foobar
+@end smallexample
+
+If this happens, you should recompile your code with @option{-mxgot}.
+It should then work with very large GOTs.  However, code generated with
+@option{-mxgot} is less efficient, since it takes 4 instructions to fetch
+the value of a global symbol.
+
+Note that some linkers, including newer versions of the GNU linker,
+can create multiple GOTs and sort GOT entries.  If you have such a linker,
+you should only need to use @option{-mxgot} when compiling a single
+object file that accesses more than 8192 GOT entries.  Very few do.
+
+These options have no effect unless GCC is generating
+position-independent code.
+
+@end table
+
+@node M68hc1x Options
+@subsection M68hc1x Options
+@cindex M68hc1x options
+
+These are the @samp{-m} options defined for the 68hc11 and 68hc12
+microcontrollers.  The default values for these options depends on
+which style of microcontroller was selected when the compiler was configured;
+the defaults for the most common choices are given below.
+
+@table @gcctabopt
+@item -m6811
+@itemx -m68hc11
+@opindex m6811
+@opindex m68hc11
+Generate output for a 68HC11.  This is the default
+when the compiler is configured for 68HC11-based systems.
+
+@item -m6812
+@itemx -m68hc12
+@opindex m6812
+@opindex m68hc12
+Generate output for a 68HC12.  This is the default
+when the compiler is configured for 68HC12-based systems.
+
+@item -m68S12
+@itemx -m68hcs12
+@opindex m68S12
+@opindex m68hcs12
+Generate output for a 68HCS12.
+
+@item -mauto-incdec
+@opindex mauto-incdec
+Enable the use of 68HC12 pre and post auto-increment and auto-decrement
+addressing modes.
+
+@item -minmax
+@itemx -nominmax
+@opindex minmax
+@opindex mnominmax
+Enable the use of 68HC12 min and max instructions.
+
+@item -mlong-calls
+@itemx -mno-long-calls
+@opindex mlong-calls
+@opindex mno-long-calls
+Treat all calls as being far away (near).  If calls are assumed to be
+far away, the compiler will use the @code{call} instruction to
+call a function and the @code{rtc} instruction for returning.
+
+@item -mshort
+@opindex mshort
+Consider type @code{int} to be 16 bits wide, like @code{short int}.
+
+@item -msoft-reg-count=@var{count}
+@opindex msoft-reg-count
+Specify the number of pseudo-soft registers which are used for the
+code generation.  The maximum number is 32.  Using more pseudo-soft
+register may or may not result in better code depending on the program.
+The default is 4 for 68HC11 and 2 for 68HC12.
+
+@end table
+
+@node MCore Options
+@subsection MCore Options
+@cindex MCore options
+
+These are the @samp{-m} options defined for the Motorola M*Core
+processors.
+
+@table @gcctabopt
+
+@item -mhardlit
+@itemx -mno-hardlit
+@opindex mhardlit
+@opindex mno-hardlit
+Inline constants into the code stream if it can be done in two
+instructions or less.
+
+@item -mdiv
+@itemx -mno-div
+@opindex mdiv
+@opindex mno-div
+Use the divide instruction.  (Enabled by default).
+
+@item -mrelax-immediate
+@itemx -mno-relax-immediate
+@opindex mrelax-immediate
+@opindex mno-relax-immediate
+Allow arbitrary sized immediates in bit operations.
+
+@item -mwide-bitfields
+@itemx -mno-wide-bitfields
+@opindex mwide-bitfields
+@opindex mno-wide-bitfields
+Always treat bit-fields as int-sized.
+
+@item -m4byte-functions
+@itemx -mno-4byte-functions
+@opindex m4byte-functions
+@opindex mno-4byte-functions
+Force all functions to be aligned to a four byte boundary.
+
+@item -mcallgraph-data
+@itemx -mno-callgraph-data
+@opindex mcallgraph-data
+@opindex mno-callgraph-data
+Emit callgraph information.
+
+@item -mslow-bytes
+@itemx -mno-slow-bytes
+@opindex mslow-bytes
+@opindex mno-slow-bytes
+Prefer word access when reading byte quantities.
+
+@item -mlittle-endian
+@itemx -mbig-endian
+@opindex mlittle-endian
+@opindex mbig-endian
+Generate code for a little endian target.
+
+@item -m210
+@itemx -m340
+@opindex m210
+@opindex m340
+Generate code for the 210 processor.
+
+@item -mno-lsim
+@opindex no-lsim
+Assume that run-time support has been provided and so omit the
+simulator library (@file{libsim.a)} from the linker command line.
+
+@item -mstack-increment=@var{size}
+@opindex mstack-increment
+Set the maximum amount for a single stack increment operation.  Large
+values can increase the speed of programs which contain functions
+that need a large amount of stack space, but they can also trigger a
+segmentation fault if the stack is extended too much.  The default
+value is 0x1000.
+
+@end table
+
+@node MIPS Options
+@subsection MIPS Options
+@cindex MIPS options
+
+@table @gcctabopt
+
+@item -EB
+@opindex EB
+Generate big-endian code.
+
+@item -EL
+@opindex EL
+Generate little-endian code.  This is the default for @samp{mips*el-*-*}
+configurations.
+
+@item -march=@var{arch}
+@opindex march
+Generate code that will run on @var{arch}, which can be the name of a
+generic MIPS ISA, or the name of a particular processor.
+The ISA names are:
+@samp{mips1}, @samp{mips2}, @samp{mips3}, @samp{mips4},
+@samp{mips32}, @samp{mips32r2}, @samp{mips64} and @samp{mips64r2}.
+The processor names are:
+@samp{4kc}, @samp{4km}, @samp{4kp}, @samp{4ksc},
+@samp{4kec}, @samp{4kem}, @samp{4kep}, @samp{4ksd},
+@samp{5kc}, @samp{5kf},
+@samp{20kc},
+@samp{24kc}, @samp{24kf2_1}, @samp{24kf1_1},
+@samp{24kec}, @samp{24kef2_1}, @samp{24kef1_1},
+@samp{34kc}, @samp{34kf2_1}, @samp{34kf1_1},
+@samp{74kc}, @samp{74kf2_1}, @samp{74kf1_1}, @samp{74kf3_2},
+@samp{loongson2e}, @samp{loongson2f},
+@samp{m4k},
+@samp{octeon},
+@samp{orion},
+@samp{r2000}, @samp{r3000}, @samp{r3900}, @samp{r4000}, @samp{r4400},
+@samp{r4600}, @samp{r4650}, @samp{r6000}, @samp{r8000},
+@samp{rm7000}, @samp{rm9000},
+@samp{r10000}, @samp{r12000}, @samp{r14000}, @samp{r16000},
+@samp{sb1},
+@samp{sr71000},
+@samp{vr4100}, @samp{vr4111}, @samp{vr4120}, @samp{vr4130}, @samp{vr4300},
+@samp{vr5000}, @samp{vr5400}, @samp{vr5500}
+and @samp{xlr}.
+The special value @samp{from-abi} selects the
+most compatible architecture for the selected ABI (that is,
+@samp{mips1} for 32-bit ABIs and @samp{mips3} for 64-bit ABIs)@.
+
+Native Linux/GNU toolchains also support the value @samp{native},
+which selects the best architecture option for the host processor.
+@option{-march=native} has no effect if GCC does not recognize
+the processor.
+
+In processor names, a final @samp{000} can be abbreviated as @samp{k}
+(for example, @samp{-march=r2k}).  Prefixes are optional, and
+@samp{vr} may be written @samp{r}.
+
+Names of the form @samp{@var{n}f2_1} refer to processors with
+FPUs clocked at half the rate of the core, names of the form
+@samp{@var{n}f1_1} refer to processors with FPUs clocked at the same
+rate as the core, and names of the form @samp{@var{n}f3_2} refer to
+processors with FPUs clocked a ratio of 3:2 with respect to the core.
+For compatibility reasons, @samp{@var{n}f} is accepted as a synonym
+for @samp{@var{n}f2_1} while @samp{@var{n}x} and @samp{@var{b}fx} are
+accepted as synonyms for @samp{@var{n}f1_1}.
+
+GCC defines two macros based on the value of this option.  The first
+is @samp{_MIPS_ARCH}, which gives the name of target architecture, as
+a string.  The second has the form @samp{_MIPS_ARCH_@var{foo}},
+where @var{foo} is the capitalized value of @samp{_MIPS_ARCH}@.
+For example, @samp{-march=r2000} will set @samp{_MIPS_ARCH}
+to @samp{"r2000"} and define the macro @samp{_MIPS_ARCH_R2000}.
+
+Note that the @samp{_MIPS_ARCH} macro uses the processor names given
+above.  In other words, it will have the full prefix and will not
+abbreviate @samp{000} as @samp{k}.  In the case of @samp{from-abi},
+the macro names the resolved architecture (either @samp{"mips1"} or
+@samp{"mips3"}).  It names the default architecture when no
+@option{-march} option is given.
+
+@item -mtune=@var{arch}
+@opindex mtune
+Optimize for @var{arch}.  Among other things, this option controls
+the way instructions are scheduled, and the perceived cost of arithmetic
+operations.  The list of @var{arch} values is the same as for
+@option{-march}.
+
+When this option is not used, GCC will optimize for the processor
+specified by @option{-march}.  By using @option{-march} and
+@option{-mtune} together, it is possible to generate code that will
+run on a family of processors, but optimize the code for one
+particular member of that family.
+
+@samp{-mtune} defines the macros @samp{_MIPS_TUNE} and
+@samp{_MIPS_TUNE_@var{foo}}, which work in the same way as the
+@samp{-march} ones described above.
+
+@item -mips1
+@opindex mips1
+Equivalent to @samp{-march=mips1}.
+
+@item -mips2
+@opindex mips2
+Equivalent to @samp{-march=mips2}.
+
+@item -mips3
+@opindex mips3
+Equivalent to @samp{-march=mips3}.
+
+@item -mips4
+@opindex mips4
+Equivalent to @samp{-march=mips4}.
+
+@item -mips32
+@opindex mips32
+Equivalent to @samp{-march=mips32}.
+
+@item -mips32r2
+@opindex mips32r2
+Equivalent to @samp{-march=mips32r2}.
+
+@item -mips64
+@opindex mips64
+Equivalent to @samp{-march=mips64}.
+
+@item -mips64r2
+@opindex mips64r2
+Equivalent to @samp{-march=mips64r2}.
+
+@item -mips16
+@itemx -mno-mips16
+@opindex mips16
+@opindex mno-mips16
+Generate (do not generate) MIPS16 code.  If GCC is targetting a
+MIPS32 or MIPS64 architecture, it will make use of the MIPS16e ASE@.
+
+MIPS16 code generation can also be controlled on a per-function basis
+by means of @code{mips16} and @code{nomips16} attributes.  
+@xref{Function Attributes}, for more information.
+
+@item -mflip-mips16
+@opindex mflip-mips16
+Generate MIPS16 code on alternating functions.  This option is provided
+for regression testing of mixed MIPS16/non-MIPS16 code generation, and is
+not intended for ordinary use in compiling user code.
+
+@item -minterlink-mips16
+@itemx -mno-interlink-mips16
+@opindex minterlink-mips16
+@opindex mno-interlink-mips16
+Require (do not require) that non-MIPS16 code be link-compatible with
+MIPS16 code.
+
+For example, non-MIPS16 code cannot jump directly to MIPS16 code;
+it must either use a call or an indirect jump.  @option{-minterlink-mips16}
+therefore disables direct jumps unless GCC knows that the target of the
+jump is not MIPS16.
+
+@item -mabi=32
+@itemx -mabi=o64
+@itemx -mabi=n32
+@itemx -mabi=64
+@itemx -mabi=eabi
+@opindex mabi=32
+@opindex mabi=o64
+@opindex mabi=n32
+@opindex mabi=64
+@opindex mabi=eabi
+Generate code for the given ABI@.
+
+Note that the EABI has a 32-bit and a 64-bit variant.  GCC normally
+generates 64-bit code when you select a 64-bit architecture, but you
+can use @option{-mgp32} to get 32-bit code instead.
+
+For information about the O64 ABI, see
+@w{@uref{http://gcc.gnu.org/projects/mipso64-abi.html}}.
+
+GCC supports a variant of the o32 ABI in which floating-point registers
+are 64 rather than 32 bits wide.  You can select this combination with
+@option{-mabi=32} @option{-mfp64}.  This ABI relies on the @samp{mthc1}
+and @samp{mfhc1} instructions and is therefore only supported for
+MIPS32R2 processors.
+
+The register assignments for arguments and return values remain the
+same, but each scalar value is passed in a single 64-bit register
+rather than a pair of 32-bit registers.  For example, scalar
+floating-point values are returned in @samp{$f0} only, not a
+@samp{$f0}/@samp{$f1} pair.  The set of call-saved registers also
+remains the same, but all 64 bits are saved.
+
+@item -mabicalls
+@itemx -mno-abicalls
+@opindex mabicalls
+@opindex mno-abicalls
+Generate (do not generate) code that is suitable for SVR4-style
+dynamic objects.  @option{-mabicalls} is the default for SVR4-based
+systems.
+
+@item -mshared
+@itemx -mno-shared
+Generate (do not generate) code that is fully position-independent,
+and that can therefore be linked into shared libraries.  This option
+only affects @option{-mabicalls}.
+
+All @option{-mabicalls} code has traditionally been position-independent,
+regardless of options like @option{-fPIC} and @option{-fpic}.  However,
+as an extension, the GNU toolchain allows executables to use absolute
+accesses for locally-binding symbols.  It can also use shorter GP
+initialization sequences and generate direct calls to locally-defined
+functions.  This mode is selected by @option{-mno-shared}.
+
+@option{-mno-shared} depends on binutils 2.16 or higher and generates
+objects that can only be linked by the GNU linker.  However, the option
+does not affect the ABI of the final executable; it only affects the ABI
+of relocatable objects.  Using @option{-mno-shared} will generally make
+executables both smaller and quicker.
+
+@option{-mshared} is the default.
+
+@item -mplt
+@itemx -mno-plt
+@opindex mplt
+@opindex mno-plt
+Assume (do not assume) that the static and dynamic linkers
+support PLTs and copy relocations.  This option only affects
+@samp{-mno-shared -mabicalls}.  For the n64 ABI, this option
+has no effect without @samp{-msym32}.
+
+You can make @option{-mplt} the default by configuring
+GCC with @option{--with-mips-plt}.  The default is
+@option{-mno-plt} otherwise.
+
+@item -mxgot
+@itemx -mno-xgot
+@opindex mxgot
+@opindex mno-xgot
+Lift (do not lift) the usual restrictions on the size of the global
+offset table.
+
+GCC normally uses a single instruction to load values from the GOT@.
+While this is relatively efficient, it will only work if the GOT
+is smaller than about 64k.  Anything larger will cause the linker
+to report an error such as:
+
+@cindex relocation truncated to fit (MIPS)
+@smallexample
+relocation truncated to fit: R_MIPS_GOT16 foobar
+@end smallexample
+
+If this happens, you should recompile your code with @option{-mxgot}.
+It should then work with very large GOTs, although it will also be
+less efficient, since it will take three instructions to fetch the
+value of a global symbol.
+
+Note that some linkers can create multiple GOTs.  If you have such a
+linker, you should only need to use @option{-mxgot} when a single object
+file accesses more than 64k's worth of GOT entries.  Very few do.
+
+These options have no effect unless GCC is generating position
+independent code.
+
+@item -mgp32
+@opindex mgp32
+Assume that general-purpose registers are 32 bits wide.
+
+@item -mgp64
+@opindex mgp64
+Assume that general-purpose registers are 64 bits wide.
+
+@item -mfp32
+@opindex mfp32
+Assume that floating-point registers are 32 bits wide.
+
+@item -mfp64
+@opindex mfp64
+Assume that floating-point registers are 64 bits wide.
+
+@item -mhard-float
+@opindex mhard-float
+Use floating-point coprocessor instructions.
+
+@item -msoft-float
+@opindex msoft-float
+Do not use floating-point coprocessor instructions.  Implement
+floating-point calculations using library calls instead.
+
+@item -msingle-float
+@opindex msingle-float
+Assume that the floating-point coprocessor only supports single-precision
+operations.
+
+@item -mdouble-float
+@opindex mdouble-float
+Assume that the floating-point coprocessor supports double-precision
+operations.  This is the default.
+
+@item -mllsc
+@itemx -mno-llsc
+@opindex mllsc
+@opindex mno-llsc
+Use (do not use) @samp{ll}, @samp{sc}, and @samp{sync} instructions to
+implement atomic memory built-in functions.  When neither option is
+specified, GCC will use the instructions if the target architecture
+supports them.
+
+@option{-mllsc} is useful if the runtime environment can emulate the
+instructions and @option{-mno-llsc} can be useful when compiling for
+nonstandard ISAs.  You can make either option the default by
+configuring GCC with @option{--with-llsc} and @option{--without-llsc}
+respectively.  @option{--with-llsc} is the default for some
+configurations; see the installation documentation for details.
+
+@item -mdsp
+@itemx -mno-dsp
+@opindex mdsp
+@opindex mno-dsp
+Use (do not use) revision 1 of the MIPS DSP ASE@.
+@xref{MIPS DSP Built-in Functions}.  This option defines the
+preprocessor macro @samp{__mips_dsp}.  It also defines
+@samp{__mips_dsp_rev} to 1.
+
+@item -mdspr2
+@itemx -mno-dspr2
+@opindex mdspr2
+@opindex mno-dspr2
+Use (do not use) revision 2 of the MIPS DSP ASE@.
+@xref{MIPS DSP Built-in Functions}.  This option defines the
+preprocessor macros @samp{__mips_dsp} and @samp{__mips_dspr2}.
+It also defines @samp{__mips_dsp_rev} to 2.
+
+@item -msmartmips
+@itemx -mno-smartmips
+@opindex msmartmips
+@opindex mno-smartmips
+Use (do not use) the MIPS SmartMIPS ASE.
+
+@item -mpaired-single
+@itemx -mno-paired-single
+@opindex mpaired-single
+@opindex mno-paired-single
+Use (do not use) paired-single floating-point instructions.
+@xref{MIPS Paired-Single Support}.  This option requires
+hardware floating-point support to be enabled.
+
+@item -mdmx
+@itemx -mno-mdmx
+@opindex mdmx
+@opindex mno-mdmx
+Use (do not use) MIPS Digital Media Extension instructions.
+This option can only be used when generating 64-bit code and requires
+hardware floating-point support to be enabled.
+
+@item -mips3d
+@itemx -mno-mips3d
+@opindex mips3d
+@opindex mno-mips3d
+Use (do not use) the MIPS-3D ASE@.  @xref{MIPS-3D Built-in Functions}.
+The option @option{-mips3d} implies @option{-mpaired-single}.
+
+@item -mmt
+@itemx -mno-mt
+@opindex mmt
+@opindex mno-mt
+Use (do not use) MT Multithreading instructions.
+
+@item -mlong64
+@opindex mlong64
+Force @code{long} types to be 64 bits wide.  See @option{-mlong32} for
+an explanation of the default and the way that the pointer size is
+determined.
+
+@item -mlong32
+@opindex mlong32
+Force @code{long}, @code{int}, and pointer types to be 32 bits wide.
+
+The default size of @code{int}s, @code{long}s and pointers depends on
+the ABI@.  All the supported ABIs use 32-bit @code{int}s.  The n64 ABI
+uses 64-bit @code{long}s, as does the 64-bit EABI; the others use
+32-bit @code{long}s.  Pointers are the same size as @code{long}s,
+or the same size as integer registers, whichever is smaller.
+
+@item -msym32
+@itemx -mno-sym32
+@opindex msym32
+@opindex mno-sym32
+Assume (do not assume) that all symbols have 32-bit values, regardless
+of the selected ABI@.  This option is useful in combination with
+@option{-mabi=64} and @option{-mno-abicalls} because it allows GCC
+to generate shorter and faster references to symbolic addresses.
+
+@item -G @var{num}
+@opindex G
+Put definitions of externally-visible data in a small data section
+if that data is no bigger than @var{num} bytes.  GCC can then access
+the data more efficiently; see @option{-mgpopt} for details.
+
+The default @option{-G} option depends on the configuration.
+
+@item -mlocal-sdata
+@itemx -mno-local-sdata
+@opindex mlocal-sdata
+@opindex mno-local-sdata
+Extend (do not extend) the @option{-G} behavior to local data too,
+such as to static variables in C@.  @option{-mlocal-sdata} is the
+default for all configurations.
+
+If the linker complains that an application is using too much small data,
+you might want to try rebuilding the less performance-critical parts with
+@option{-mno-local-sdata}.  You might also want to build large
+libraries with @option{-mno-local-sdata}, so that the libraries leave
+more room for the main program.
+
+@item -mextern-sdata
+@itemx -mno-extern-sdata
+@opindex mextern-sdata
+@opindex mno-extern-sdata
+Assume (do not assume) that externally-defined data will be in
+a small data section if that data is within the @option{-G} limit.
+@option{-mextern-sdata} is the default for all configurations.
+
+If you compile a module @var{Mod} with @option{-mextern-sdata} @option{-G
+@var{num}} @option{-mgpopt}, and @var{Mod} references a variable @var{Var}
+that is no bigger than @var{num} bytes, you must make sure that @var{Var}
+is placed in a small data section.  If @var{Var} is defined by another
+module, you must either compile that module with a high-enough
+@option{-G} setting or attach a @code{section} attribute to @var{Var}'s
+definition.  If @var{Var} is common, you must link the application
+with a high-enough @option{-G} setting.
+
+The easiest way of satisfying these restrictions is to compile
+and link every module with the same @option{-G} option.  However,
+you may wish to build a library that supports several different
+small data limits.  You can do this by compiling the library with
+the highest supported @option{-G} setting and additionally using
+@option{-mno-extern-sdata} to stop the library from making assumptions
+about externally-defined data.
+
+@item -mgpopt
+@itemx -mno-gpopt
+@opindex mgpopt
+@opindex mno-gpopt
+Use (do not use) GP-relative accesses for symbols that are known to be
+in a small data section; see @option{-G}, @option{-mlocal-sdata} and
+@option{-mextern-sdata}.  @option{-mgpopt} is the default for all
+configurations.
+
+@option{-mno-gpopt} is useful for cases where the @code{$gp} register
+might not hold the value of @code{_gp}.  For example, if the code is
+part of a library that might be used in a boot monitor, programs that
+call boot monitor routines will pass an unknown value in @code{$gp}.
+(In such situations, the boot monitor itself would usually be compiled
+with @option{-G0}.)
+
+@option{-mno-gpopt} implies @option{-mno-local-sdata} and
+@option{-mno-extern-sdata}.
+
+@item -membedded-data
+@itemx -mno-embedded-data
+@opindex membedded-data
+@opindex mno-embedded-data
+Allocate variables to the read-only data section first if possible, then
+next in the small data section if possible, otherwise in data.  This gives
+slightly slower code than the default, but reduces the amount of RAM required
+when executing, and thus may be preferred for some embedded systems.
+
+@item -muninit-const-in-rodata
+@itemx -mno-uninit-const-in-rodata
+@opindex muninit-const-in-rodata
+@opindex mno-uninit-const-in-rodata
+Put uninitialized @code{const} variables in the read-only data section.
+This option is only meaningful in conjunction with @option{-membedded-data}.
+
+@item -mcode-readable=@var{setting}
+@opindex mcode-readable
+Specify whether GCC may generate code that reads from executable sections.
+There are three possible settings:
+
+@table @gcctabopt
+@item -mcode-readable=yes
+Instructions may freely access executable sections.  This is the
+default setting.
+
+@item -mcode-readable=pcrel
+MIPS16 PC-relative load instructions can access executable sections,
+but other instructions must not do so.  This option is useful on 4KSc
+and 4KSd processors when the code TLBs have the Read Inhibit bit set.
+It is also useful on processors that can be configured to have a dual
+instruction/data SRAM interface and that, like the M4K, automatically
+redirect PC-relative loads to the instruction RAM.
+
+@item -mcode-readable=no
+Instructions must not access executable sections.  This option can be
+useful on targets that are configured to have a dual instruction/data
+SRAM interface but that (unlike the M4K) do not automatically redirect
+PC-relative loads to the instruction RAM.
+@end table
+
+@item -msplit-addresses
+@itemx -mno-split-addresses
+@opindex msplit-addresses
+@opindex mno-split-addresses
+Enable (disable) use of the @code{%hi()} and @code{%lo()} assembler
+relocation operators.  This option has been superseded by
+@option{-mexplicit-relocs} but is retained for backwards compatibility.
+
+@item -mexplicit-relocs
+@itemx -mno-explicit-relocs
+@opindex mexplicit-relocs
+@opindex mno-explicit-relocs
+Use (do not use) assembler relocation operators when dealing with symbolic
+addresses.  The alternative, selected by @option{-mno-explicit-relocs},
+is to use assembler macros instead.
+
+@option{-mexplicit-relocs} is the default if GCC was configured
+to use an assembler that supports relocation operators.
+
+@item -mcheck-zero-division
+@itemx -mno-check-zero-division
+@opindex mcheck-zero-division
+@opindex mno-check-zero-division
+Trap (do not trap) on integer division by zero.
+
+The default is @option{-mcheck-zero-division}.
+
+@item -mdivide-traps
+@itemx -mdivide-breaks
+@opindex mdivide-traps
+@opindex mdivide-breaks
+MIPS systems check for division by zero by generating either a
+conditional trap or a break instruction.  Using traps results in
+smaller code, but is only supported on MIPS II and later.  Also, some
+versions of the Linux kernel have a bug that prevents trap from
+generating the proper signal (@code{SIGFPE}).  Use @option{-mdivide-traps} to
+allow conditional traps on architectures that support them and
+@option{-mdivide-breaks} to force the use of breaks.
+
+The default is usually @option{-mdivide-traps}, but this can be
+overridden at configure time using @option{--with-divide=breaks}.
+Divide-by-zero checks can be completely disabled using
+@option{-mno-check-zero-division}.
+
+@item -mmemcpy
+@itemx -mno-memcpy
+@opindex mmemcpy
+@opindex mno-memcpy
+Force (do not force) the use of @code{memcpy()} for non-trivial block
+moves.  The default is @option{-mno-memcpy}, which allows GCC to inline
+most constant-sized copies.
+
+@item -mlong-calls
+@itemx -mno-long-calls
+@opindex mlong-calls
+@opindex mno-long-calls
+Disable (do not disable) use of the @code{jal} instruction.  Calling
+functions using @code{jal} is more efficient but requires the caller
+and callee to be in the same 256 megabyte segment.
+
+This option has no effect on abicalls code.  The default is
+@option{-mno-long-calls}.
+
+@item -mmad
+@itemx -mno-mad
+@opindex mmad
+@opindex mno-mad
+Enable (disable) use of the @code{mad}, @code{madu} and @code{mul}
+instructions, as provided by the R4650 ISA@.
+
+@item -mfused-madd
+@itemx -mno-fused-madd
+@opindex mfused-madd
+@opindex mno-fused-madd
+Enable (disable) use of the floating point multiply-accumulate
+instructions, when they are available.  The default is
+@option{-mfused-madd}.
+
+When multiply-accumulate instructions are used, the intermediate
+product is calculated to infinite precision and is not subject to
+the FCSR Flush to Zero bit.  This may be undesirable in some
+circumstances.
+
+@item -nocpp
+@opindex nocpp
+Tell the MIPS assembler to not run its preprocessor over user
+assembler files (with a @samp{.s} suffix) when assembling them.
+
+@item -mfix-r4000
+@itemx -mno-fix-r4000
+@opindex mfix-r4000
+@opindex mno-fix-r4000
+Work around certain R4000 CPU errata:
+@itemize @minus
+@item
+A double-word or a variable shift may give an incorrect result if executed
+immediately after starting an integer division.
+@item
+A double-word or a variable shift may give an incorrect result if executed
+while an integer multiplication is in progress.
+@item
+An integer division may give an incorrect result if started in a delay slot
+of a taken branch or a jump.
+@end itemize
+
+@item -mfix-r4400
+@itemx -mno-fix-r4400
+@opindex mfix-r4400
+@opindex mno-fix-r4400
+Work around certain R4400 CPU errata:
+@itemize @minus
+@item
+A double-word or a variable shift may give an incorrect result if executed
+immediately after starting an integer division.
+@end itemize
+
+@item -mfix-r10000
+@itemx -mno-fix-r10000
+@opindex mfix-r10000
+@opindex mno-fix-r10000
+Work around certain R10000 errata:
+@itemize @minus
+@item
+@code{ll}/@code{sc} sequences may not behave atomically on revisions
+prior to 3.0.  They may deadlock on revisions 2.6 and earlier.
+@end itemize
+
+This option can only be used if the target architecture supports
+branch-likely instructions.  @option{-mfix-r10000} is the default when
+@option{-march=r10000} is used; @option{-mno-fix-r10000} is the default
+otherwise.
+
+@item -mfix-vr4120
+@itemx -mno-fix-vr4120
+@opindex mfix-vr4120
+Work around certain VR4120 errata:
+@itemize @minus
+@item
+@code{dmultu} does not always produce the correct result.
+@item
+@code{div} and @code{ddiv} do not always produce the correct result if one
+of the operands is negative.
+@end itemize
+The workarounds for the division errata rely on special functions in
+@file{libgcc.a}.  At present, these functions are only provided by
+the @code{mips64vr*-elf} configurations.
+
+Other VR4120 errata require a nop to be inserted between certain pairs of
+instructions.  These errata are handled by the assembler, not by GCC itself.
+
+@item -mfix-vr4130
+@opindex mfix-vr4130
+Work around the VR4130 @code{mflo}/@code{mfhi} errata.  The
+workarounds are implemented by the assembler rather than by GCC,
+although GCC will avoid using @code{mflo} and @code{mfhi} if the
+VR4130 @code{macc}, @code{macchi}, @code{dmacc} and @code{dmacchi}
+instructions are available instead.
+
+@item -mfix-sb1
+@itemx -mno-fix-sb1
+@opindex mfix-sb1
+Work around certain SB-1 CPU core errata.
+(This flag currently works around the SB-1 revision 2
+``F1'' and ``F2'' floating point errata.)
+
+@item -mr10k-cache-barrier=@var{setting}
+@opindex mr10k-cache-barrier
+Specify whether GCC should insert cache barriers to avoid the
+side-effects of speculation on R10K processors.
+
+In common with many processors, the R10K tries to predict the outcome
+of a conditional branch and speculatively executes instructions from
+the ``taken'' branch.  It later aborts these instructions if the
+predicted outcome was wrong.  However, on the R10K, even aborted
+instructions can have side effects.
+
+This problem only affects kernel stores and, depending on the system,
+kernel loads.  As an example, a speculatively-executed store may load
+the target memory into cache and mark the cache line as dirty, even if
+the store itself is later aborted.  If a DMA operation writes to the
+same area of memory before the ``dirty'' line is flushed, the cached
+data will overwrite the DMA-ed data.  See the R10K processor manual
+for a full description, including other potential problems.
+
+One workaround is to insert cache barrier instructions before every memory
+access that might be speculatively executed and that might have side
+effects even if aborted.  @option{-mr10k-cache-barrier=@var{setting}}
+controls GCC's implementation of this workaround.  It assumes that
+aborted accesses to any byte in the following regions will not have
+side effects:
+
+@enumerate
+@item
+the memory occupied by the current function's stack frame;
+
+@item
+the memory occupied by an incoming stack argument;
+
+@item
+the memory occupied by an object with a link-time-constant address.
+@end enumerate
+
+It is the kernel's responsibility to ensure that speculative
+accesses to these regions are indeed safe.
+
+If the input program contains a function declaration such as:
+
+@smallexample
+void foo (void);
+@end smallexample
+
+then the implementation of @code{foo} must allow @code{j foo} and
+@code{jal foo} to be executed speculatively.  GCC honors this
+restriction for functions it compiles itself.  It expects non-GCC
+functions (such as hand-written assembly code) to do the same.
+
+The option has three forms:
+
+@table @gcctabopt
+@item -mr10k-cache-barrier=load-store
+Insert a cache barrier before a load or store that might be
+speculatively executed and that might have side effects even
+if aborted.
+
+@item -mr10k-cache-barrier=store
+Insert a cache barrier before a store that might be speculatively
+executed and that might have side effects even if aborted.
+
+@item -mr10k-cache-barrier=none
+Disable the insertion of cache barriers.  This is the default setting.
+@end table
+
+@item -mflush-func=@var{func}
+@itemx -mno-flush-func
+@opindex mflush-func
+Specifies the function to call to flush the I and D caches, or to not
+call any such function.  If called, the function must take the same
+arguments as the common @code{_flush_func()}, that is, the address of the
+memory range for which the cache is being flushed, the size of the
+memory range, and the number 3 (to flush both caches).  The default
+depends on the target GCC was configured for, but commonly is either
+@samp{_flush_func} or @samp{__cpu_flush}.
+
+@item mbranch-cost=@var{num}
+@opindex mbranch-cost
+Set the cost of branches to roughly @var{num} ``simple'' instructions.
+This cost is only a heuristic and is not guaranteed to produce
+consistent results across releases.  A zero cost redundantly selects
+the default, which is based on the @option{-mtune} setting.
+
+@item -mbranch-likely
+@itemx -mno-branch-likely
+@opindex mbranch-likely
+@opindex mno-branch-likely
+Enable or disable use of Branch Likely instructions, regardless of the
+default for the selected architecture.  By default, Branch Likely
+instructions may be generated if they are supported by the selected
+architecture.  An exception is for the MIPS32 and MIPS64 architectures
+and processors which implement those architectures; for those, Branch
+Likely instructions will not be generated by default because the MIPS32
+and MIPS64 architectures specifically deprecate their use.
+
+@item -mfp-exceptions
+@itemx -mno-fp-exceptions
+@opindex mfp-exceptions
+Specifies whether FP exceptions are enabled.  This affects how we schedule
+FP instructions for some processors.  The default is that FP exceptions are
+enabled.
+
+For instance, on the SB-1, if FP exceptions are disabled, and we are emitting
+64-bit code, then we can use both FP pipes.  Otherwise, we can only use one
+FP pipe.
+
+@item -mvr4130-align
+@itemx -mno-vr4130-align
+@opindex mvr4130-align
+The VR4130 pipeline is two-way superscalar, but can only issue two
+instructions together if the first one is 8-byte aligned.  When this
+option is enabled, GCC will align pairs of instructions that it
+thinks should execute in parallel.
+
+This option only has an effect when optimizing for the VR4130.
+It normally makes code faster, but at the expense of making it bigger.
+It is enabled by default at optimization level @option{-O3}.
+@end table
+
+@node MMIX Options
+@subsection MMIX Options
+@cindex MMIX Options
+
+These options are defined for the MMIX:
+
+@table @gcctabopt
+@item -mlibfuncs
+@itemx -mno-libfuncs
+@opindex mlibfuncs
+@opindex mno-libfuncs
+Specify that intrinsic library functions are being compiled, passing all
+values in registers, no matter the size.
+
+@item -mepsilon
+@itemx -mno-epsilon
+@opindex mepsilon
+@opindex mno-epsilon
+Generate floating-point comparison instructions that compare with respect
+to the @code{rE} epsilon register.
+
+@item -mabi=mmixware
+@itemx -mabi=gnu
+@opindex mabi-mmixware
+@opindex mabi=gnu
+Generate code that passes function parameters and return values that (in
+the called function) are seen as registers @code{$0} and up, as opposed to
+the GNU ABI which uses global registers @code{$231} and up.
+
+@item -mzero-extend
+@itemx -mno-zero-extend
+@opindex mzero-extend
+@opindex mno-zero-extend
+When reading data from memory in sizes shorter than 64 bits, use (do not
+use) zero-extending load instructions by default, rather than
+sign-extending ones.
+
+@item -mknuthdiv
+@itemx -mno-knuthdiv
+@opindex mknuthdiv
+@opindex mno-knuthdiv
+Make the result of a division yielding a remainder have the same sign as
+the divisor.  With the default, @option{-mno-knuthdiv}, the sign of the
+remainder follows the sign of the dividend.  Both methods are
+arithmetically valid, the latter being almost exclusively used.
+
+@item -mtoplevel-symbols
+@itemx -mno-toplevel-symbols
+@opindex mtoplevel-symbols
+@opindex mno-toplevel-symbols
+Prepend (do not prepend) a @samp{:} to all global symbols, so the assembly
+code can be used with the @code{PREFIX} assembly directive.
+
+@item -melf
+@opindex melf
+Generate an executable in the ELF format, rather than the default
+@samp{mmo} format used by the @command{mmix} simulator.
+
+@item -mbranch-predict
+@itemx -mno-branch-predict
+@opindex mbranch-predict
+@opindex mno-branch-predict
+Use (do not use) the probable-branch instructions, when static branch
+prediction indicates a probable branch.
+
+@item -mbase-addresses
+@itemx -mno-base-addresses
+@opindex mbase-addresses
+@opindex mno-base-addresses
+Generate (do not generate) code that uses @emph{base addresses}.  Using a
+base address automatically generates a request (handled by the assembler
+and the linker) for a constant to be set up in a global register.  The
+register is used for one or more base address requests within the range 0
+to 255 from the value held in the register.  The generally leads to short
+and fast code, but the number of different data items that can be
+addressed is limited.  This means that a program that uses lots of static
+data may require @option{-mno-base-addresses}.
+
+@item -msingle-exit
+@itemx -mno-single-exit
+@opindex msingle-exit
+@opindex mno-single-exit
+Force (do not force) generated code to have a single exit point in each
+function.
+@end table
+
+@node MN10300 Options
+@subsection MN10300 Options
+@cindex MN10300 options
+
+These @option{-m} options are defined for Matsushita MN10300 architectures:
+
+@table @gcctabopt
+@item -mmult-bug
+@opindex mmult-bug
+Generate code to avoid bugs in the multiply instructions for the MN10300
+processors.  This is the default.
+
+@item -mno-mult-bug
+@opindex mno-mult-bug
+Do not generate code to avoid bugs in the multiply instructions for the
+MN10300 processors.
+
+@item -mam33
+@opindex mam33
+Generate code which uses features specific to the AM33 processor.
+
+@item -mno-am33
+@opindex mno-am33
+Do not generate code which uses features specific to the AM33 processor.  This
+is the default.
+
+@item -mreturn-pointer-on-d0
+@opindex mreturn-pointer-on-d0
+When generating a function which returns a pointer, return the pointer
+in both @code{a0} and @code{d0}.  Otherwise, the pointer is returned
+only in a0, and attempts to call such functions without a prototype
+would result in errors.  Note that this option is on by default; use
+@option{-mno-return-pointer-on-d0} to disable it.
+
+@item -mno-crt0
+@opindex mno-crt0
+Do not link in the C run-time initialization object file.
+
+@item -mrelax
+@opindex mrelax
+Indicate to the linker that it should perform a relaxation optimization pass
+to shorten branches, calls and absolute memory addresses.  This option only
+has an effect when used on the command line for the final link step.
+
+This option makes symbolic debugging impossible.
+@end table
+
+@node PDP-11 Options
+@subsection PDP-11 Options
+@cindex PDP-11 Options
+
+These options are defined for the PDP-11:
+
+@table @gcctabopt
+@item -mfpu
+@opindex mfpu
+Use hardware FPP floating point.  This is the default.  (FIS floating
+point on the PDP-11/40 is not supported.)
+
+@item -msoft-float
+@opindex msoft-float
+Do not use hardware floating point.
+
+@item -mac0
+@opindex mac0
+Return floating-point results in ac0 (fr0 in Unix assembler syntax).
+
+@item -mno-ac0
+@opindex mno-ac0
+Return floating-point results in memory.  This is the default.
+
+@item -m40
+@opindex m40
+Generate code for a PDP-11/40.
+
+@item -m45
+@opindex m45
+Generate code for a PDP-11/45.  This is the default.
+
+@item -m10
+@opindex m10
+Generate code for a PDP-11/10.
+
+@item -mbcopy-builtin
+@opindex bcopy-builtin
+Use inline @code{movmemhi} patterns for copying memory.  This is the
+default.
+
+@item -mbcopy
+@opindex mbcopy
+Do not use inline @code{movmemhi} patterns for copying memory.
+
+@item -mint16
+@itemx -mno-int32
+@opindex mint16
+@opindex mno-int32
+Use 16-bit @code{int}.  This is the default.
+
+@item -mint32
+@itemx -mno-int16
+@opindex mint32
+@opindex mno-int16
+Use 32-bit @code{int}.
+
+@item -mfloat64
+@itemx -mno-float32
+@opindex mfloat64
+@opindex mno-float32
+Use 64-bit @code{float}.  This is the default.
+
+@item -mfloat32
+@itemx -mno-float64
+@opindex mfloat32
+@opindex mno-float64
+Use 32-bit @code{float}.
+
+@item -mabshi
+@opindex mabshi
+Use @code{abshi2} pattern.  This is the default.
+
+@item -mno-abshi
+@opindex mno-abshi
+Do not use @code{abshi2} pattern.
+
+@item -mbranch-expensive
+@opindex mbranch-expensive
+Pretend that branches are expensive.  This is for experimenting with
+code generation only.
+
+@item -mbranch-cheap
+@opindex mbranch-cheap
+Do not pretend that branches are expensive.  This is the default.
+
+@item -msplit
+@opindex msplit
+Generate code for a system with split I&D@.
+
+@item -mno-split
+@opindex mno-split
+Generate code for a system without split I&D@.  This is the default.
+
+@item -munix-asm
+@opindex munix-asm
+Use Unix assembler syntax.  This is the default when configured for
+@samp{pdp11-*-bsd}.
+
+@item -mdec-asm
+@opindex mdec-asm
+Use DEC assembler syntax.  This is the default when configured for any
+PDP-11 target other than @samp{pdp11-*-bsd}.
+@end table
+
+@node picoChip Options
+@subsection picoChip Options
+@cindex picoChip options
+
+These @samp{-m} options are defined for picoChip implementations:
+
+@table @gcctabopt
+
+@item -mae=@var{ae_type}
+@opindex mcpu
+Set the instruction set, register set, and instruction scheduling
+parameters for array element type @var{ae_type}.  Supported values
+for @var{ae_type} are @samp{ANY}, @samp{MUL}, and @samp{MAC}.
+
+@option{-mae=ANY} selects a completely generic AE type.  Code
+generated with this option will run on any of the other AE types.  The
+code will not be as efficient as it would be if compiled for a specific
+AE type, and some types of operation (e.g., multiplication) will not
+work properly on all types of AE.
+
+@option{-mae=MUL} selects a MUL AE type.  This is the most useful AE type
+for compiled code, and is the default.
+
+@option{-mae=MAC} selects a DSP-style MAC AE.  Code compiled with this
+option may suffer from poor performance of byte (char) manipulation,
+since the DSP AE does not provide hardware support for byte load/stores.
+
+@item -msymbol-as-address
+Enable the compiler to directly use a symbol name as an address in a
+load/store instruction, without first loading it into a
+register.  Typically, the use of this option will generate larger
+programs, which run faster than when the option isn't used.  However, the
+results vary from program to program, so it is left as a user option,
+rather than being permanently enabled.
+
+@item -mno-inefficient-warnings
+Disables warnings about the generation of inefficient code.  These
+warnings can be generated, for example, when compiling code which
+performs byte-level memory operations on the MAC AE type.  The MAC AE has
+no hardware support for byte-level memory operations, so all byte
+load/stores must be synthesized from word load/store operations.  This is
+inefficient and a warning will be generated indicating to the programmer
+that they should rewrite the code to avoid byte operations, or to target
+an AE type which has the necessary hardware support.  This option enables
+the warning to be turned off.
+
+@end table
+
+@node PowerPC Options
+@subsection PowerPC Options
+@cindex PowerPC options
+
+These are listed under @xref{RS/6000 and PowerPC Options}.
+
+@node RS/6000 and PowerPC Options
+@subsection IBM RS/6000 and PowerPC Options
+@cindex RS/6000 and PowerPC Options
+@cindex IBM RS/6000 and PowerPC Options
+
+These @samp{-m} options are defined for the IBM RS/6000 and PowerPC:
+@table @gcctabopt
+@item -mpower
+@itemx -mno-power
+@itemx -mpower2
+@itemx -mno-power2
+@itemx -mpowerpc
+@itemx -mno-powerpc
+@itemx -mpowerpc-gpopt
+@itemx -mno-powerpc-gpopt
+@itemx -mpowerpc-gfxopt
+@itemx -mno-powerpc-gfxopt
+@itemx -mpowerpc64
+@itemx -mno-powerpc64
+@itemx -mmfcrf
+@itemx -mno-mfcrf
+@itemx -mpopcntb
+@itemx -mno-popcntb
+@itemx -mfprnd
+@itemx -mno-fprnd
+@itemx -mcmpb
+@itemx -mno-cmpb
+@itemx -mmfpgpr
+@itemx -mno-mfpgpr
+@itemx -mhard-dfp
+@itemx -mno-hard-dfp
+@opindex mpower
+@opindex mno-power
+@opindex mpower2
+@opindex mno-power2
+@opindex mpowerpc
+@opindex mno-powerpc
+@opindex mpowerpc-gpopt
+@opindex mno-powerpc-gpopt
+@opindex mpowerpc-gfxopt
+@opindex mno-powerpc-gfxopt
+@opindex mpowerpc64
+@opindex mno-powerpc64
+@opindex mmfcrf
+@opindex mno-mfcrf
+@opindex mpopcntb
+@opindex mno-popcntb
+@opindex mfprnd
+@opindex mno-fprnd
+@opindex mcmpb
+@opindex mno-cmpb
+@opindex mmfpgpr
+@opindex mno-mfpgpr
+@opindex mhard-dfp
+@opindex mno-hard-dfp
+GCC supports two related instruction set architectures for the
+RS/6000 and PowerPC@.  The @dfn{POWER} instruction set are those
+instructions supported by the @samp{rios} chip set used in the original
+RS/6000 systems and the @dfn{PowerPC} instruction set is the
+architecture of the Freescale MPC5xx, MPC6xx, MPC8xx microprocessors, and
+the IBM 4xx, 6xx, and follow-on microprocessors.
+
+Neither architecture is a subset of the other.  However there is a
+large common subset of instructions supported by both.  An MQ
+register is included in processors supporting the POWER architecture.
+
+You use these options to specify which instructions are available on the
+processor you are using.  The default value of these options is
+determined when configuring GCC@.  Specifying the
+@option{-mcpu=@var{cpu_type}} overrides the specification of these
+options.  We recommend you use the @option{-mcpu=@var{cpu_type}} option
+rather than the options listed above.
+
+The @option{-mpower} option allows GCC to generate instructions that
+are found only in the POWER architecture and to use the MQ register.
+Specifying @option{-mpower2} implies @option{-power} and also allows GCC
+to generate instructions that are present in the POWER2 architecture but
+not the original POWER architecture.
+
+The @option{-mpowerpc} option allows GCC to generate instructions that
+are found only in the 32-bit subset of the PowerPC architecture.
+Specifying @option{-mpowerpc-gpopt} implies @option{-mpowerpc} and also allows
+GCC to use the optional PowerPC architecture instructions in the
+General Purpose group, including floating-point square root.  Specifying
+@option{-mpowerpc-gfxopt} implies @option{-mpowerpc} and also allows GCC to
+use the optional PowerPC architecture instructions in the Graphics
+group, including floating-point select.
+
+The @option{-mmfcrf} option allows GCC to generate the move from
+condition register field instruction implemented on the POWER4
+processor and other processors that support the PowerPC V2.01
+architecture.
+The @option{-mpopcntb} option allows GCC to generate the popcount and
+double precision FP reciprocal estimate instruction implemented on the
+POWER5 processor and other processors that support the PowerPC V2.02
+architecture.
+The @option{-mfprnd} option allows GCC to generate the FP round to
+integer instructions implemented on the POWER5+ processor and other
+processors that support the PowerPC V2.03 architecture.
+The @option{-mcmpb} option allows GCC to generate the compare bytes
+instruction implemented on the POWER6 processor and other processors
+that support the PowerPC V2.05 architecture.
+The @option{-mmfpgpr} option allows GCC to generate the FP move to/from
+general purpose register instructions implemented on the POWER6X
+processor and other processors that support the extended PowerPC V2.05
+architecture.
+The @option{-mhard-dfp} option allows GCC to generate the decimal floating
+point instructions implemented on some POWER processors.
+
+The @option{-mpowerpc64} option allows GCC to generate the additional
+64-bit instructions that are found in the full PowerPC64 architecture
+and to treat GPRs as 64-bit, doubleword quantities.  GCC defaults to
+@option{-mno-powerpc64}.
+
+If you specify both @option{-mno-power} and @option{-mno-powerpc}, GCC
+will use only the instructions in the common subset of both
+architectures plus some special AIX common-mode calls, and will not use
+the MQ register.  Specifying both @option{-mpower} and @option{-mpowerpc}
+permits GCC to use any instruction from either architecture and to
+allow use of the MQ register; specify this for the Motorola MPC601.
+
+@item -mnew-mnemonics
+@itemx -mold-mnemonics
+@opindex mnew-mnemonics
+@opindex mold-mnemonics
+Select which mnemonics to use in the generated assembler code.  With
+@option{-mnew-mnemonics}, GCC uses the assembler mnemonics defined for
+the PowerPC architecture.  With @option{-mold-mnemonics} it uses the
+assembler mnemonics defined for the POWER architecture.  Instructions
+defined in only one architecture have only one mnemonic; GCC uses that
+mnemonic irrespective of which of these options is specified.
+
+GCC defaults to the mnemonics appropriate for the architecture in
+use.  Specifying @option{-mcpu=@var{cpu_type}} sometimes overrides the
+value of these option.  Unless you are building a cross-compiler, you
+should normally not specify either @option{-mnew-mnemonics} or
+@option{-mold-mnemonics}, but should instead accept the default.
+
+@item -mcpu=@var{cpu_type}
+@opindex mcpu
+Set architecture type, register usage, choice of mnemonics, and
+instruction scheduling parameters for machine type @var{cpu_type}.
+Supported values for @var{cpu_type} are @samp{401}, @samp{403},
+@samp{405}, @samp{405fp}, @samp{440}, @samp{440fp}, @samp{464}, @samp{464fp},
+@samp{505}, @samp{601}, @samp{602}, @samp{603}, @samp{603e}, @samp{604},
+@samp{604e}, @samp{620}, @samp{630}, @samp{740}, @samp{7400},
+@samp{7450}, @samp{750}, @samp{801}, @samp{821}, @samp{823},
+@samp{860}, @samp{970}, @samp{8540}, @samp{e300c2}, @samp{e300c3},
+@samp{e500mc}, @samp{ec603e}, @samp{G3}, @samp{G4}, @samp{G5},
+@samp{power}, @samp{power2}, @samp{power3}, @samp{power4},
+@samp{power5}, @samp{power5+}, @samp{power6}, @samp{power6x}, @samp{power7}
+@samp{common}, @samp{powerpc}, @samp{powerpc64}, @samp{rios},
+@samp{rios1}, @samp{rios2}, @samp{rsc}, and @samp{rs64}.
+
+@option{-mcpu=common} selects a completely generic processor.  Code
+generated under this option will run on any POWER or PowerPC processor.
+GCC will use only the instructions in the common subset of both
+architectures, and will not use the MQ register.  GCC assumes a generic
+processor model for scheduling purposes.
+
+@option{-mcpu=power}, @option{-mcpu=power2}, @option{-mcpu=powerpc}, and
+@option{-mcpu=powerpc64} specify generic POWER, POWER2, pure 32-bit
+PowerPC (i.e., not MPC601), and 64-bit PowerPC architecture machine
+types, with an appropriate, generic processor model assumed for
+scheduling purposes.
+
+The other options specify a specific processor.  Code generated under
+those options will run best on that processor, and may not run at all on
+others.
+
+The @option{-mcpu} options automatically enable or disable the
+following options:
+
+@gccoptlist{-maltivec  -mfprnd  -mhard-float  -mmfcrf  -mmultiple @gol
+-mnew-mnemonics  -mpopcntb  -mpower  -mpower2  -mpowerpc64 @gol
+-mpowerpc-gpopt  -mpowerpc-gfxopt  -msingle-float -mdouble-float @gol
+-msimple-fpu -mstring  -mmulhw  -mdlmzb  -mmfpgpr}
+
+The particular options set for any particular CPU will vary between
+compiler versions, depending on what setting seems to produce optimal
+code for that CPU; it doesn't necessarily reflect the actual hardware's
+capabilities.  If you wish to set an individual option to a particular
+value, you may specify it after the @option{-mcpu} option, like
+@samp{-mcpu=970 -mno-altivec}.
+
+On AIX, the @option{-maltivec} and @option{-mpowerpc64} options are
+not enabled or disabled by the @option{-mcpu} option at present because
+AIX does not have full support for these options.  You may still
+enable or disable them individually if you're sure it'll work in your
+environment.
+
+@item -mtune=@var{cpu_type}
+@opindex mtune
+Set the instruction scheduling parameters for machine type
+@var{cpu_type}, but do not set the architecture type, register usage, or
+choice of mnemonics, as @option{-mcpu=@var{cpu_type}} would.  The same
+values for @var{cpu_type} are used for @option{-mtune} as for
+@option{-mcpu}.  If both are specified, the code generated will use the
+architecture, registers, and mnemonics set by @option{-mcpu}, but the
+scheduling parameters set by @option{-mtune}.
+
+@item -mswdiv
+@itemx -mno-swdiv
+@opindex mswdiv
+@opindex mno-swdiv
+Generate code to compute division as reciprocal estimate and iterative
+refinement, creating opportunities for increased throughput.  This
+feature requires: optional PowerPC Graphics instruction set for single
+precision and FRE instruction for double precision, assuming divides
+cannot generate user-visible traps, and the domain values not include
+Infinities, denormals or zero denominator.
+
+@item -maltivec
+@itemx -mno-altivec
+@opindex maltivec
+@opindex mno-altivec
+Generate code that uses (does not use) AltiVec instructions, and also
+enable the use of built-in functions that allow more direct access to
+the AltiVec instruction set.  You may also need to set
+@option{-mabi=altivec} to adjust the current ABI with AltiVec ABI
+enhancements.
+
+@item -mvrsave
+@itemx -mno-vrsave
+@opindex mvrsave
+@opindex mno-vrsave
+Generate VRSAVE instructions when generating AltiVec code.
+
+@item -mgen-cell-microcode
+@opindex mgen-cell-microcode
+Generate Cell microcode instructions
+
+@item -mwarn-cell-microcode
+@opindex mwarn-cell-microcode
+Warning when a Cell microcode instruction is going to emitted.  An example
+of a Cell microcode instruction is a variable shift.
+
+@item -msecure-plt
+@opindex msecure-plt
+Generate code that allows ld and ld.so to build executables and shared
+libraries with non-exec .plt and .got sections.  This is a PowerPC
+32-bit SYSV ABI option.
+
+@item -mbss-plt
+@opindex mbss-plt
+Generate code that uses a BSS .plt section that ld.so fills in, and
+requires .plt and .got sections that are both writable and executable.
+This is a PowerPC 32-bit SYSV ABI option.
+
+@item -misel
+@itemx -mno-isel
+@opindex misel
+@opindex mno-isel
+This switch enables or disables the generation of ISEL instructions.
+
+@item -misel=@var{yes/no}
+This switch has been deprecated.  Use @option{-misel} and
+@option{-mno-isel} instead.
+
+@item -mspe
+@itemx -mno-spe
+@opindex mspe
+@opindex mno-spe
+This switch enables or disables the generation of SPE simd
+instructions.
+
+@item -mpaired
+@itemx -mno-paired
+@opindex mpaired
+@opindex mno-paired
+This switch enables or disables the generation of PAIRED simd
+instructions.
+
+@item -mspe=@var{yes/no}
+This option has been deprecated.  Use @option{-mspe} and
+@option{-mno-spe} instead.
+
+@item -mfloat-gprs=@var{yes/single/double/no}
+@itemx -mfloat-gprs
+@opindex mfloat-gprs
+This switch enables or disables the generation of floating point
+operations on the general purpose registers for architectures that
+support it.
+
+The argument @var{yes} or @var{single} enables the use of
+single-precision floating point operations.
+
+The argument @var{double} enables the use of single and
+double-precision floating point operations.
+
+The argument @var{no} disables floating point operations on the
+general purpose registers.
+
+This option is currently only available on the MPC854x.
+
+@item -m32
+@itemx -m64
+@opindex m32
+@opindex m64
+Generate code for 32-bit or 64-bit environments of Darwin and SVR4
+targets (including GNU/Linux).  The 32-bit environment sets int, long
+and pointer to 32 bits and generates code that runs on any PowerPC
+variant.  The 64-bit environment sets int to 32 bits and long and
+pointer to 64 bits, and generates code for PowerPC64, as for
+@option{-mpowerpc64}.
+
+@item -mfull-toc
+@itemx -mno-fp-in-toc
+@itemx -mno-sum-in-toc
+@itemx -mminimal-toc
+@opindex mfull-toc
+@opindex mno-fp-in-toc
+@opindex mno-sum-in-toc
+@opindex mminimal-toc
+Modify generation of the TOC (Table Of Contents), which is created for
+every executable file.  The @option{-mfull-toc} option is selected by
+default.  In that case, GCC will allocate at least one TOC entry for
+each unique non-automatic variable reference in your program.  GCC
+will also place floating-point constants in the TOC@.  However, only
+16,384 entries are available in the TOC@.
+
+If you receive a linker error message that saying you have overflowed
+the available TOC space, you can reduce the amount of TOC space used
+with the @option{-mno-fp-in-toc} and @option{-mno-sum-in-toc} options.
+@option{-mno-fp-in-toc} prevents GCC from putting floating-point
+constants in the TOC and @option{-mno-sum-in-toc} forces GCC to
+generate code to calculate the sum of an address and a constant at
+run-time instead of putting that sum into the TOC@.  You may specify one
+or both of these options.  Each causes GCC to produce very slightly
+slower and larger code at the expense of conserving TOC space.
+
+If you still run out of space in the TOC even when you specify both of
+these options, specify @option{-mminimal-toc} instead.  This option causes
+GCC to make only one TOC entry for every file.  When you specify this
+option, GCC will produce code that is slower and larger but which
+uses extremely little TOC space.  You may wish to use this option
+only on files that contain less frequently executed code.
+
+@item -maix64
+@itemx -maix32
+@opindex maix64
+@opindex maix32
+Enable 64-bit AIX ABI and calling convention: 64-bit pointers, 64-bit
+@code{long} type, and the infrastructure needed to support them.
+Specifying @option{-maix64} implies @option{-mpowerpc64} and
+@option{-mpowerpc}, while @option{-maix32} disables the 64-bit ABI and
+implies @option{-mno-powerpc64}.  GCC defaults to @option{-maix32}.
+
+@item -mxl-compat
+@itemx -mno-xl-compat
+@opindex mxl-compat
+@opindex mno-xl-compat
+Produce code that conforms more closely to IBM XL compiler semantics
+when using AIX-compatible ABI@.  Pass floating-point arguments to
+prototyped functions beyond the register save area (RSA) on the stack
+in addition to argument FPRs.  Do not assume that most significant
+double in 128-bit long double value is properly rounded when comparing
+values and converting to double.  Use XL symbol names for long double
+support routines.
+
+The AIX calling convention was extended but not initially documented to
+handle an obscure K&R C case of calling a function that takes the
+address of its arguments with fewer arguments than declared.  IBM XL
+compilers access floating point arguments which do not fit in the
+RSA from the stack when a subroutine is compiled without
+optimization.  Because always storing floating-point arguments on the
+stack is inefficient and rarely needed, this option is not enabled by
+default and only is necessary when calling subroutines compiled by IBM
+XL compilers without optimization.
+
+@item -mpe
+@opindex mpe
+Support @dfn{IBM RS/6000 SP} @dfn{Parallel Environment} (PE)@.  Link an
+application written to use message passing with special startup code to
+enable the application to run.  The system must have PE installed in the
+standard location (@file{/usr/lpp/ppe.poe/}), or the @file{specs} file
+must be overridden with the @option{-specs=} option to specify the
+appropriate directory location.  The Parallel Environment does not
+support threads, so the @option{-mpe} option and the @option{-pthread}
+option are incompatible.
+
+@item -malign-natural
+@itemx -malign-power
+@opindex malign-natural
+@opindex malign-power
+On AIX, 32-bit Darwin, and 64-bit PowerPC GNU/Linux, the option
+@option{-malign-natural} overrides the ABI-defined alignment of larger
+types, such as floating-point doubles, on their natural size-based boundary.
+The option @option{-malign-power} instructs GCC to follow the ABI-specified
+alignment rules.  GCC defaults to the standard alignment defined in the ABI@.
+
+On 64-bit Darwin, natural alignment is the default, and @option{-malign-power}
+is not supported.
+
+@item -msoft-float
+@itemx -mhard-float
+@opindex msoft-float
+@opindex mhard-float
+Generate code that does not use (uses) the floating-point register set.
+Software floating point emulation is provided if you use the
+@option{-msoft-float} option, and pass the option to GCC when linking.
+
+@item -msingle-float
+@itemx -mdouble-float
+@opindex msingle-float
+@opindex mdouble-float
+Generate code for single or double-precision floating point operations. 
+@option{-mdouble-float} implies @option{-msingle-float}. 
+
+@item -msimple-fpu
+@opindex msimple-fpu
+Do not generate sqrt and div instructions for hardware floating point unit.
+
+@item -mfpu
+@opindex mfpu
+Specify type of floating point unit.  Valid values are @var{sp_lite} 
+(equivalent to -msingle-float -msimple-fpu), @var{dp_lite} (equivalent
+to -mdouble-float -msimple-fpu), @var{sp_full} (equivalent to -msingle-float),
+and @var{dp_full} (equivalent to -mdouble-float).
+
+@item -mxilinx-fpu
+@opindex mxilinx-fpu
+Perform optimizations for floating point unit on Xilinx PPC 405/440.
+
+@item -mmultiple
+@itemx -mno-multiple
+@opindex mmultiple
+@opindex mno-multiple
+Generate code that uses (does not use) the load multiple word
+instructions and the store multiple word instructions.  These
+instructions are generated by default on POWER systems, and not
+generated on PowerPC systems.  Do not use @option{-mmultiple} on little
+endian PowerPC systems, since those instructions do not work when the
+processor is in little endian mode.  The exceptions are PPC740 and
+PPC750 which permit the instructions usage in little endian mode.
+
+@item -mstring
+@itemx -mno-string
+@opindex mstring
+@opindex mno-string
+Generate code that uses (does not use) the load string instructions
+and the store string word instructions to save multiple registers and
+do small block moves.  These instructions are generated by default on
+POWER systems, and not generated on PowerPC systems.  Do not use
+@option{-mstring} on little endian PowerPC systems, since those
+instructions do not work when the processor is in little endian mode.
+The exceptions are PPC740 and PPC750 which permit the instructions
+usage in little endian mode.
+
+@item -mupdate
+@itemx -mno-update
+@opindex mupdate
+@opindex mno-update
+Generate code that uses (does not use) the load or store instructions
+that update the base register to the address of the calculated memory
+location.  These instructions are generated by default.  If you use
+@option{-mno-update}, there is a small window between the time that the
+stack pointer is updated and the address of the previous frame is
+stored, which means code that walks the stack frame across interrupts or
+signals may get corrupted data.
+
+@item -mavoid-indexed-addresses
+@item -mno-avoid-indexed-addresses
+@opindex mavoid-indexed-addresses
+@opindex mno-avoid-indexed-addresses
+Generate code that tries to avoid (not avoid) the use of indexed load
+or store instructions. These instructions can incur a performance
+penalty on Power6 processors in certain situations, such as when
+stepping through large arrays that cross a 16M boundary.  This option
+is enabled by default when targetting Power6 and disabled otherwise.
+
+@item -mfused-madd
+@itemx -mno-fused-madd
+@opindex mfused-madd
+@opindex mno-fused-madd
+Generate code that uses (does not use) the floating point multiply and
+accumulate instructions.  These instructions are generated by default if
+hardware floating is used.
+
+@item -mmulhw
+@itemx -mno-mulhw
+@opindex mmulhw
+@opindex mno-mulhw
+Generate code that uses (does not use) the half-word multiply and
+multiply-accumulate instructions on the IBM 405, 440 and 464 processors.
+These instructions are generated by default when targetting those
+processors.
+
+@item -mdlmzb
+@itemx -mno-dlmzb
+@opindex mdlmzb
+@opindex mno-dlmzb
+Generate code that uses (does not use) the string-search @samp{dlmzb}
+instruction on the IBM 405, 440 and 464 processors.  This instruction is
+generated by default when targetting those processors.
+
+@item -mno-bit-align
+@itemx -mbit-align
+@opindex mno-bit-align
+@opindex mbit-align
+On System V.4 and embedded PowerPC systems do not (do) force structures
+and unions that contain bit-fields to be aligned to the base type of the
+bit-field.
+
+For example, by default a structure containing nothing but 8
+@code{unsigned} bit-fields of length 1 would be aligned to a 4 byte
+boundary and have a size of 4 bytes.  By using @option{-mno-bit-align},
+the structure would be aligned to a 1 byte boundary and be one byte in
+size.
+
+@item -mno-strict-align
+@itemx -mstrict-align
+@opindex mno-strict-align
+@opindex mstrict-align
+On System V.4 and embedded PowerPC systems do not (do) assume that
+unaligned memory references will be handled by the system.
+
+@item -mrelocatable
+@itemx -mno-relocatable
+@opindex mrelocatable
+@opindex mno-relocatable
+On embedded PowerPC systems generate code that allows (does not allow)
+the program to be relocated to a different address at runtime.  If you
+use @option{-mrelocatable} on any module, all objects linked together must
+be compiled with @option{-mrelocatable} or @option{-mrelocatable-lib}.
+
+@item -mrelocatable-lib
+@itemx -mno-relocatable-lib
+@opindex mrelocatable-lib
+@opindex mno-relocatable-lib
+On embedded PowerPC systems generate code that allows (does not allow)
+the program to be relocated to a different address at runtime.  Modules
+compiled with @option{-mrelocatable-lib} can be linked with either modules
+compiled without @option{-mrelocatable} and @option{-mrelocatable-lib} or
+with modules compiled with the @option{-mrelocatable} options.
+
+@item -mno-toc
+@itemx -mtoc
+@opindex mno-toc
+@opindex mtoc
+On System V.4 and embedded PowerPC systems do not (do) assume that
+register 2 contains a pointer to a global area pointing to the addresses
+used in the program.
+
+@item -mlittle
+@itemx -mlittle-endian
+@opindex mlittle
+@opindex mlittle-endian
+On System V.4 and embedded PowerPC systems compile code for the
+processor in little endian mode.  The @option{-mlittle-endian} option is
+the same as @option{-mlittle}.
+
+@item -mbig
+@itemx -mbig-endian
+@opindex mbig
+@opindex mbig-endian
+On System V.4 and embedded PowerPC systems compile code for the
+processor in big endian mode.  The @option{-mbig-endian} option is
+the same as @option{-mbig}.
+
+@item -mdynamic-no-pic
+@opindex mdynamic-no-pic
+On Darwin and Mac OS X systems, compile code so that it is not
+relocatable, but that its external references are relocatable.  The
+resulting code is suitable for applications, but not shared
+libraries.
+
+@item -mprioritize-restricted-insns=@var{priority}
+@opindex mprioritize-restricted-insns
+This option controls the priority that is assigned to
+dispatch-slot restricted instructions during the second scheduling
+pass.  The argument @var{priority} takes the value @var{0/1/2} to assign
+@var{no/highest/second-highest} priority to dispatch slot restricted
+instructions.
+
+@item -msched-costly-dep=@var{dependence_type}
+@opindex msched-costly-dep
+This option controls which dependences are considered costly
+by the target during instruction scheduling.  The argument
+@var{dependence_type} takes one of the following values:
+@var{no}: no dependence is costly,
+@var{all}: all dependences are costly,
+@var{true_store_to_load}: a true dependence from store to load is costly,
+@var{store_to_load}: any dependence from store to load is costly,
+@var{number}: any dependence which latency >= @var{number} is costly.
+
+@item -minsert-sched-nops=@var{scheme}
+@opindex minsert-sched-nops
+This option controls which nop insertion scheme will be used during
+the second scheduling pass.  The argument @var{scheme} takes one of the
+following values:
+@var{no}: Don't insert nops.
+@var{pad}: Pad with nops any dispatch group which has vacant issue slots,
+according to the scheduler's grouping.
+@var{regroup_exact}: Insert nops to force costly dependent insns into
+separate groups.  Insert exactly as many nops as needed to force an insn
+to a new group, according to the estimated processor grouping.
+@var{number}: Insert nops to force costly dependent insns into
+separate groups.  Insert @var{number} nops to force an insn to a new group.
+
+@item -mcall-sysv
+@opindex mcall-sysv
+On System V.4 and embedded PowerPC systems compile code using calling
+conventions that adheres to the March 1995 draft of the System V
+Application Binary Interface, PowerPC processor supplement.  This is the
+default unless you configured GCC using @samp{powerpc-*-eabiaix}.
+
+@item -mcall-sysv-eabi
+@opindex mcall-sysv-eabi
+Specify both @option{-mcall-sysv} and @option{-meabi} options.
+
+@item -mcall-sysv-noeabi
+@opindex mcall-sysv-noeabi
+Specify both @option{-mcall-sysv} and @option{-mno-eabi} options.
+
+@item -mcall-solaris
+@opindex mcall-solaris
+On System V.4 and embedded PowerPC systems compile code for the Solaris
+operating system.
+
+@item -mcall-linux
+@opindex mcall-linux
+On System V.4 and embedded PowerPC systems compile code for the
+Linux-based GNU system.
+
+@item -mcall-gnu
+@opindex mcall-gnu
+On System V.4 and embedded PowerPC systems compile code for the
+Hurd-based GNU system.
+
+@item -mcall-netbsd
+@opindex mcall-netbsd
+On System V.4 and embedded PowerPC systems compile code for the
+NetBSD operating system.
+
+@item -maix-struct-return
+@opindex maix-struct-return
+Return all structures in memory (as specified by the AIX ABI)@.
+
+@item -msvr4-struct-return
+@opindex msvr4-struct-return
+Return structures smaller than 8 bytes in registers (as specified by the
+SVR4 ABI)@.
+
+@item -mabi=@var{abi-type}
+@opindex mabi
+Extend the current ABI with a particular extension, or remove such extension.
+Valid values are @var{altivec}, @var{no-altivec}, @var{spe},
+@var{no-spe}, @var{ibmlongdouble}, @var{ieeelongdouble}@.
+
+@item -mabi=spe
+@opindex mabi=spe
+Extend the current ABI with SPE ABI extensions.  This does not change
+the default ABI, instead it adds the SPE ABI extensions to the current
+ABI@.
+
+@item -mabi=no-spe
+@opindex mabi=no-spe
+Disable Booke SPE ABI extensions for the current ABI@.
+
+@item -mabi=ibmlongdouble
+@opindex mabi=ibmlongdouble
+Change the current ABI to use IBM extended precision long double.
+This is a PowerPC 32-bit SYSV ABI option.
+
+@item -mabi=ieeelongdouble
+@opindex mabi=ieeelongdouble
+Change the current ABI to use IEEE extended precision long double.
+This is a PowerPC 32-bit Linux ABI option.
+
+@item -mprototype
+@itemx -mno-prototype
+@opindex mprototype
+@opindex mno-prototype
+On System V.4 and embedded PowerPC systems assume that all calls to
+variable argument functions are properly prototyped.  Otherwise, the
+compiler must insert an instruction before every non prototyped call to
+set or clear bit 6 of the condition code register (@var{CR}) to
+indicate whether floating point values were passed in the floating point
+registers in case the function takes a variable arguments.  With
+@option{-mprototype}, only calls to prototyped variable argument functions
+will set or clear the bit.
+
+@item -msim
+@opindex msim
+On embedded PowerPC systems, assume that the startup module is called
+@file{sim-crt0.o} and that the standard C libraries are @file{libsim.a} and
+@file{libc.a}.  This is the default for @samp{powerpc-*-eabisim}
+configurations.
+
+@item -mmvme
+@opindex mmvme
+On embedded PowerPC systems, assume that the startup module is called
+@file{crt0.o} and the standard C libraries are @file{libmvme.a} and
+@file{libc.a}.
+
+@item -mads
+@opindex mads
+On embedded PowerPC systems, assume that the startup module is called
+@file{crt0.o} and the standard C libraries are @file{libads.a} and
+@file{libc.a}.
+
+@item -myellowknife
+@opindex myellowknife
+On embedded PowerPC systems, assume that the startup module is called
+@file{crt0.o} and the standard C libraries are @file{libyk.a} and
+@file{libc.a}.
+
+@item -mvxworks
+@opindex mvxworks
+On System V.4 and embedded PowerPC systems, specify that you are
+compiling for a VxWorks system.
+
+@item -memb
+@opindex memb
+On embedded PowerPC systems, set the @var{PPC_EMB} bit in the ELF flags
+header to indicate that @samp{eabi} extended relocations are used.
+
+@item -meabi
+@itemx -mno-eabi
+@opindex meabi
+@opindex mno-eabi
+On System V.4 and embedded PowerPC systems do (do not) adhere to the
+Embedded Applications Binary Interface (eabi) which is a set of
+modifications to the System V.4 specifications.  Selecting @option{-meabi}
+means that the stack is aligned to an 8 byte boundary, a function
+@code{__eabi} is called to from @code{main} to set up the eabi
+environment, and the @option{-msdata} option can use both @code{r2} and
+@code{r13} to point to two separate small data areas.  Selecting
+@option{-mno-eabi} means that the stack is aligned to a 16 byte boundary,
+do not call an initialization function from @code{main}, and the
+@option{-msdata} option will only use @code{r13} to point to a single
+small data area.  The @option{-meabi} option is on by default if you
+configured GCC using one of the @samp{powerpc*-*-eabi*} options.
+
+@item -msdata=eabi
+@opindex msdata=eabi
+On System V.4 and embedded PowerPC systems, put small initialized
+@code{const} global and static data in the @samp{.sdata2} section, which
+is pointed to by register @code{r2}.  Put small initialized
+non-@code{const} global and static data in the @samp{.sdata} section,
+which is pointed to by register @code{r13}.  Put small uninitialized
+global and static data in the @samp{.sbss} section, which is adjacent to
+the @samp{.sdata} section.  The @option{-msdata=eabi} option is
+incompatible with the @option{-mrelocatable} option.  The
+@option{-msdata=eabi} option also sets the @option{-memb} option.
+
+@item -msdata=sysv
+@opindex msdata=sysv
+On System V.4 and embedded PowerPC systems, put small global and static
+data in the @samp{.sdata} section, which is pointed to by register
+@code{r13}.  Put small uninitialized global and static data in the
+@samp{.sbss} section, which is adjacent to the @samp{.sdata} section.
+The @option{-msdata=sysv} option is incompatible with the
+@option{-mrelocatable} option.
+
+@item -msdata=default
+@itemx -msdata
+@opindex msdata=default
+@opindex msdata
+On System V.4 and embedded PowerPC systems, if @option{-meabi} is used,
+compile code the same as @option{-msdata=eabi}, otherwise compile code the
+same as @option{-msdata=sysv}.
+
+@item -msdata=data
+@opindex msdata=data
+On System V.4 and embedded PowerPC systems, put small global
+data in the @samp{.sdata} section.  Put small uninitialized global
+data in the @samp{.sbss} section.  Do not use register @code{r13}
+to address small data however.  This is the default behavior unless
+other @option{-msdata} options are used.
+
+@item -msdata=none
+@itemx -mno-sdata
+@opindex msdata=none
+@opindex mno-sdata
+On embedded PowerPC systems, put all initialized global and static data
+in the @samp{.data} section, and all uninitialized data in the
+@samp{.bss} section.
+
+@item -G @var{num}
+@opindex G
+@cindex smaller data references (PowerPC)
+@cindex .sdata/.sdata2 references (PowerPC)
+On embedded PowerPC systems, put global and static items less than or
+equal to @var{num} bytes into the small data or bss sections instead of
+the normal data or bss section.  By default, @var{num} is 8.  The
+@option{-G @var{num}} switch is also passed to the linker.
+All modules should be compiled with the same @option{-G @var{num}} value.
+
+@item -mregnames
+@itemx -mno-regnames
+@opindex mregnames
+@opindex mno-regnames
+On System V.4 and embedded PowerPC systems do (do not) emit register
+names in the assembly language output using symbolic forms.
+
+@item -mlongcall
+@itemx -mno-longcall
+@opindex mlongcall
+@opindex mno-longcall
+By default assume that all calls are far away so that a longer more
+expensive calling sequence is required.  This is required for calls
+further than 32 megabytes (33,554,432 bytes) from the current location.
+A short call will be generated if the compiler knows
+the call cannot be that far away.  This setting can be overridden by
+the @code{shortcall} function attribute, or by @code{#pragma
+longcall(0)}.
+
+Some linkers are capable of detecting out-of-range calls and generating
+glue code on the fly.  On these systems, long calls are unnecessary and
+generate slower code.  As of this writing, the AIX linker can do this,
+as can the GNU linker for PowerPC/64.  It is planned to add this feature
+to the GNU linker for 32-bit PowerPC systems as well.
+
+On Darwin/PPC systems, @code{#pragma longcall} will generate ``jbsr
+callee, L42'', plus a ``branch island'' (glue code).  The two target
+addresses represent the callee and the ``branch island''.  The
+Darwin/PPC linker will prefer the first address and generate a ``bl
+callee'' if the PPC ``bl'' instruction will reach the callee directly;
+otherwise, the linker will generate ``bl L42'' to call the ``branch
+island''.  The ``branch island'' is appended to the body of the
+calling function; it computes the full 32-bit address of the callee
+and jumps to it.
+
+On Mach-O (Darwin) systems, this option directs the compiler emit to
+the glue for every direct call, and the Darwin linker decides whether
+to use or discard it.
+
+In the future, we may cause GCC to ignore all longcall specifications
+when the linker is known to generate glue.
+
+@item -pthread
+@opindex pthread
+Adds support for multithreading with the @dfn{pthreads} library.
+This option sets flags for both the preprocessor and linker.
+
+@end table
+
+@node S/390 and zSeries Options
+@subsection S/390 and zSeries Options
+@cindex S/390 and zSeries Options
+
+These are the @samp{-m} options defined for the S/390 and zSeries architecture.
+
+@table @gcctabopt
+@item -mhard-float
+@itemx -msoft-float
+@opindex mhard-float
+@opindex msoft-float
+Use (do not use) the hardware floating-point instructions and registers
+for floating-point operations.  When @option{-msoft-float} is specified,
+functions in @file{libgcc.a} will be used to perform floating-point
+operations.  When @option{-mhard-float} is specified, the compiler
+generates IEEE floating-point instructions.  This is the default.
+
+@item -mhard-dfp
+@itemx -mno-hard-dfp
+@opindex mhard-dfp
+@opindex mno-hard-dfp
+Use (do not use) the hardware decimal-floating-point instructions for
+decimal-floating-point operations.  When @option{-mno-hard-dfp} is
+specified, functions in @file{libgcc.a} will be used to perform
+decimal-floating-point operations.  When @option{-mhard-dfp} is
+specified, the compiler generates decimal-floating-point hardware
+instructions.  This is the default for @option{-march=z9-ec} or higher.
+
+@item -mlong-double-64
+@itemx -mlong-double-128
+@opindex mlong-double-64
+@opindex mlong-double-128
+These switches control the size of @code{long double} type. A size
+of 64bit makes the @code{long double} type equivalent to the @code{double}
+type. This is the default.
+
+@item -mbackchain
+@itemx -mno-backchain
+@opindex mbackchain
+@opindex mno-backchain
+Store (do not store) the address of the caller's frame as backchain pointer
+into the callee's stack frame.
+A backchain may be needed to allow debugging using tools that do not understand
+DWARF-2 call frame information.
+When @option{-mno-packed-stack} is in effect, the backchain pointer is stored
+at the bottom of the stack frame; when @option{-mpacked-stack} is in effect,
+the backchain is placed into the topmost word of the 96/160 byte register
+save area.
+
+In general, code compiled with @option{-mbackchain} is call-compatible with
+code compiled with @option{-mmo-backchain}; however, use of the backchain
+for debugging purposes usually requires that the whole binary is built with
+@option{-mbackchain}.  Note that the combination of @option{-mbackchain},
+@option{-mpacked-stack} and @option{-mhard-float} is not supported.  In order
+to build a linux kernel use @option{-msoft-float}.
+
+The default is to not maintain the backchain.
+
+@item -mpacked-stack
+@itemx -mno-packed-stack
+@opindex mpacked-stack
+@opindex mno-packed-stack
+Use (do not use) the packed stack layout.  When @option{-mno-packed-stack} is
+specified, the compiler uses the all fields of the 96/160 byte register save
+area only for their default purpose; unused fields still take up stack space.
+When @option{-mpacked-stack} is specified, register save slots are densely
+packed at the top of the register save area; unused space is reused for other
+purposes, allowing for more efficient use of the available stack space.
+However, when @option{-mbackchain} is also in effect, the topmost word of
+the save area is always used to store the backchain, and the return address
+register is always saved two words below the backchain.
+
+As long as the stack frame backchain is not used, code generated with
+@option{-mpacked-stack} is call-compatible with code generated with
+@option{-mno-packed-stack}.  Note that some non-FSF releases of GCC 2.95 for
+S/390 or zSeries generated code that uses the stack frame backchain at run
+time, not just for debugging purposes.  Such code is not call-compatible
+with code compiled with @option{-mpacked-stack}.  Also, note that the
+combination of @option{-mbackchain},
+@option{-mpacked-stack} and @option{-mhard-float} is not supported.  In order
+to build a linux kernel use @option{-msoft-float}.
+
+The default is to not use the packed stack layout.
+
+@item -msmall-exec
+@itemx -mno-small-exec
+@opindex msmall-exec
+@opindex mno-small-exec
+Generate (or do not generate) code using the @code{bras} instruction
+to do subroutine calls.
+This only works reliably if the total executable size does not
+exceed 64k.  The default is to use the @code{basr} instruction instead,
+which does not have this limitation.
+
+@item -m64
+@itemx -m31
+@opindex m64
+@opindex m31
+When @option{-m31} is specified, generate code compliant to the
+GNU/Linux for S/390 ABI@.  When @option{-m64} is specified, generate
+code compliant to the GNU/Linux for zSeries ABI@.  This allows GCC in
+particular to generate 64-bit instructions.  For the @samp{s390}
+targets, the default is @option{-m31}, while the @samp{s390x}
+targets default to @option{-m64}.
+
+@item -mzarch
+@itemx -mesa
+@opindex mzarch
+@opindex mesa
+When @option{-mzarch} is specified, generate code using the
+instructions available on z/Architecture.
+When @option{-mesa} is specified, generate code using the
+instructions available on ESA/390.  Note that @option{-mesa} is
+not possible with @option{-m64}.
+When generating code compliant to the GNU/Linux for S/390 ABI,
+the default is @option{-mesa}.  When generating code compliant
+to the GNU/Linux for zSeries ABI, the default is @option{-mzarch}.
+
+@item -mmvcle
+@itemx -mno-mvcle
+@opindex mmvcle
+@opindex mno-mvcle
+Generate (or do not generate) code using the @code{mvcle} instruction
+to perform block moves.  When @option{-mno-mvcle} is specified,
+use a @code{mvc} loop instead.  This is the default unless optimizing for
+size.
+
+@item -mdebug
+@itemx -mno-debug
+@opindex mdebug
+@opindex mno-debug
+Print (or do not print) additional debug information when compiling.
+The default is to not print debug information.
+
+@item -march=@var{cpu-type}
+@opindex march
+Generate code that will run on @var{cpu-type}, which is the name of a system
+representing a certain processor type.  Possible values for
+@var{cpu-type} are @samp{g5}, @samp{g6}, @samp{z900}, @samp{z990},
+@samp{z9-109}, @samp{z9-ec} and @samp{z10}.
+When generating code using the instructions available on z/Architecture,
+the default is @option{-march=z900}.  Otherwise, the default is
+@option{-march=g5}.
+
+@item -mtune=@var{cpu-type}
+@opindex mtune
+Tune to @var{cpu-type} everything applicable about the generated code,
+except for the ABI and the set of available instructions.
+The list of @var{cpu-type} values is the same as for @option{-march}.
+The default is the value used for @option{-march}.
+
+@item -mtpf-trace
+@itemx -mno-tpf-trace
+@opindex mtpf-trace
+@opindex mno-tpf-trace
+Generate code that adds (does not add) in TPF OS specific branches to trace
+routines in the operating system.  This option is off by default, even
+when compiling for the TPF OS@.
+
+@item -mfused-madd
+@itemx -mno-fused-madd
+@opindex mfused-madd
+@opindex mno-fused-madd
+Generate code that uses (does not use) the floating point multiply and
+accumulate instructions.  These instructions are generated by default if
+hardware floating point is used.
+
+@item -mwarn-framesize=@var{framesize}
+@opindex mwarn-framesize
+Emit a warning if the current function exceeds the given frame size.  Because
+this is a compile time check it doesn't need to be a real problem when the program
+runs.  It is intended to identify functions which most probably cause
+a stack overflow.  It is useful to be used in an environment with limited stack
+size e.g.@: the linux kernel.
+
+@item -mwarn-dynamicstack
+@opindex mwarn-dynamicstack
+Emit a warning if the function calls alloca or uses dynamically
+sized arrays.  This is generally a bad idea with a limited stack size.
+
+@item -mstack-guard=@var{stack-guard}
+@itemx -mstack-size=@var{stack-size}
+@opindex mstack-guard
+@opindex mstack-size
+If these options are provided the s390 back end emits additional instructions in
+the function prologue which trigger a trap if the stack size is @var{stack-guard}
+bytes above the @var{stack-size} (remember that the stack on s390 grows downward).
+If the @var{stack-guard} option is omitted the smallest power of 2 larger than
+the frame size of the compiled function is chosen.
+These options are intended to be used to help debugging stack overflow problems.
+The additionally emitted code causes only little overhead and hence can also be
+used in production like systems without greater performance degradation.  The given
+values have to be exact powers of 2 and @var{stack-size} has to be greater than
+@var{stack-guard} without exceeding 64k.
+In order to be efficient the extra code makes the assumption that the stack starts
+at an address aligned to the value given by @var{stack-size}.
+The @var{stack-guard} option can only be used in conjunction with @var{stack-size}.
+@end table
+
+@node Score Options
+@subsection Score Options
+@cindex Score Options
+
+These options are defined for Score implementations:
+
+@table @gcctabopt
+@item -meb
+@opindex meb
+Compile code for big endian mode.  This is the default.
+
+@item -mel
+@opindex mel
+Compile code for little endian mode. 
+
+@item -mnhwloop
+@opindex mnhwloop
+Disable generate bcnz instruction.
+
+@item -muls
+@opindex muls
+Enable generate unaligned load and store instruction.
+
+@item -mmac
+@opindex mmac
+Enable the use of multiply-accumulate instructions. Disabled by default. 
+
+@item -mscore5
+@opindex mscore5
+Specify the SCORE5 as the target architecture.
+
+@item -mscore5u
+@opindex mscore5u
+Specify the SCORE5U of the target architecture.
+
+@item -mscore7
+@opindex mscore7
+Specify the SCORE7 as the target architecture. This is the default.
+
+@item -mscore7d
+@opindex mscore7d
+Specify the SCORE7D as the target architecture.
+@end table
+
+@node SH Options
+@subsection SH Options
+
+These @samp{-m} options are defined for the SH implementations:
+
+@table @gcctabopt
+@item -m1
+@opindex m1
+Generate code for the SH1.
+
+@item -m2
+@opindex m2
+Generate code for the SH2.
+
+@item -m2e
+Generate code for the SH2e.
+
+@item -m3
+@opindex m3
+Generate code for the SH3.
+
+@item -m3e
+@opindex m3e
+Generate code for the SH3e.
+
+@item -m4-nofpu
+@opindex m4-nofpu
+Generate code for the SH4 without a floating-point unit.
+
+@item -m4-single-only
+@opindex m4-single-only
+Generate code for the SH4 with a floating-point unit that only
+supports single-precision arithmetic.
+
+@item -m4-single
+@opindex m4-single
+Generate code for the SH4 assuming the floating-point unit is in
+single-precision mode by default.
+
+@item -m4
+@opindex m4
+Generate code for the SH4.
+
+@item -m4a-nofpu
+@opindex m4a-nofpu
+Generate code for the SH4al-dsp, or for a SH4a in such a way that the
+floating-point unit is not used.
+
+@item -m4a-single-only
+@opindex m4a-single-only
+Generate code for the SH4a, in such a way that no double-precision
+floating point operations are used.
+
+@item -m4a-single
+@opindex m4a-single
+Generate code for the SH4a assuming the floating-point unit is in
+single-precision mode by default.
+
+@item -m4a
+@opindex m4a
+Generate code for the SH4a.
+
+@item -m4al
+@opindex m4al
+Same as @option{-m4a-nofpu}, except that it implicitly passes
+@option{-dsp} to the assembler.  GCC doesn't generate any DSP
+instructions at the moment.
+
+@item -mb
+@opindex mb
+Compile code for the processor in big endian mode.
+
+@item -ml
+@opindex ml
+Compile code for the processor in little endian mode.
+
+@item -mdalign
+@opindex mdalign
+Align doubles at 64-bit boundaries.  Note that this changes the calling
+conventions, and thus some functions from the standard C library will
+not work unless you recompile it first with @option{-mdalign}.
+
+@item -mrelax
+@opindex mrelax
+Shorten some address references at link time, when possible; uses the
+linker option @option{-relax}.
+
+@item -mbigtable
+@opindex mbigtable
+Use 32-bit offsets in @code{switch} tables.  The default is to use
+16-bit offsets.
+
+@item -mbitops
+@opindex mbitops
+Enable the use of bit manipulation instructions on SH2A.
+
+@item -mfmovd
+@opindex mfmovd
+Enable the use of the instruction @code{fmovd}.
+
+@item -mhitachi
+@opindex mhitachi
+Comply with the calling conventions defined by Renesas.
+
+@item -mrenesas
+@opindex mhitachi
+Comply with the calling conventions defined by Renesas.
+
+@item -mno-renesas
+@opindex mhitachi
+Comply with the calling conventions defined for GCC before the Renesas
+conventions were available.  This option is the default for all
+targets of the SH toolchain except for @samp{sh-symbianelf}.
+
+@item -mnomacsave
+@opindex mnomacsave
+Mark the @code{MAC} register as call-clobbered, even if
+@option{-mhitachi} is given.
+
+@item -mieee
+@opindex mieee
+Increase IEEE-compliance of floating-point code.
+At the moment, this is equivalent to @option{-fno-finite-math-only}.
+When generating 16 bit SH opcodes, getting IEEE-conforming results for
+comparisons of NANs / infinities incurs extra overhead in every
+floating point comparison, therefore the default is set to
+@option{-ffinite-math-only}.
+
+@item -minline-ic_invalidate
+@opindex minline-ic_invalidate
+Inline code to invalidate instruction cache entries after setting up
+nested function trampolines.
+This option has no effect if -musermode is in effect and the selected
+code generation option (e.g. -m4) does not allow the use of the icbi
+instruction.
+If the selected code generation option does not allow the use of the icbi
+instruction, and -musermode is not in effect, the inlined code will
+manipulate the instruction cache address array directly with an associative
+write.  This not only requires privileged mode, but it will also
+fail if the cache line had been mapped via the TLB and has become unmapped.
+
+@item -misize
+@opindex misize
+Dump instruction size and location in the assembly code.
+
+@item -mpadstruct
+@opindex mpadstruct
+This option is deprecated.  It pads structures to multiple of 4 bytes,
+which is incompatible with the SH ABI@.
+
+@item -mspace
+@opindex mspace
+Optimize for space instead of speed.  Implied by @option{-Os}.
+
+@item -mprefergot
+@opindex mprefergot
+When generating position-independent code, emit function calls using
+the Global Offset Table instead of the Procedure Linkage Table.
+
+@item -musermode
+@opindex musermode
+Don't generate privileged mode only code; implies -mno-inline-ic_invalidate
+if the inlined code would not work in user mode.
+This is the default when the target is @code{sh-*-linux*}.
+
+@item -multcost=@var{number}
+@opindex multcost=@var{number}
+Set the cost to assume for a multiply insn.
+
+@item -mdiv=@var{strategy}
+@opindex mdiv=@var{strategy}
+Set the division strategy to use for SHmedia code.  @var{strategy} must be
+one of: call, call2, fp, inv, inv:minlat, inv20u, inv20l, inv:call,
+inv:call2, inv:fp .
+"fp" performs the operation in floating point.  This has a very high latency,
+but needs only a few instructions, so it might be a good choice if
+your code has enough easily exploitable ILP to allow the compiler to
+schedule the floating point instructions together with other instructions.
+Division by zero causes a floating point exception.
+"inv" uses integer operations to calculate the inverse of the divisor,
+and then multiplies the dividend with the inverse.  This strategy allows
+cse and hoisting of the inverse calculation.  Division by zero calculates
+an unspecified result, but does not trap.
+"inv:minlat" is a variant of "inv" where if no cse / hoisting opportunities
+have been found, or if the entire operation has been hoisted to the same
+place, the last stages of the inverse calculation are intertwined with the
+final multiply to reduce the overall latency, at the expense of using a few
+more instructions, and thus offering fewer scheduling opportunities with
+other code.
+"call" calls a library function that usually implements the inv:minlat
+strategy.
+This gives high code density for m5-*media-nofpu compilations.
+"call2" uses a different entry point of the same library function, where it
+assumes that a pointer to a lookup table has already been set up, which
+exposes the pointer load to cse / code hoisting optimizations.
+"inv:call", "inv:call2" and "inv:fp" all use the "inv" algorithm for initial
+code generation, but if the code stays unoptimized, revert to the "call",
+"call2", or "fp" strategies, respectively.  Note that the
+potentially-trapping side effect of division by zero is carried by a
+separate instruction, so it is possible that all the integer instructions
+are hoisted out, but the marker for the side effect stays where it is.
+A recombination to fp operations or a call is not possible in that case.
+"inv20u" and "inv20l" are variants of the "inv:minlat" strategy.  In the case
+that the inverse calculation was nor separated from the multiply, they speed
+up division where the dividend fits into 20 bits (plus sign where applicable),
+by inserting a test to skip a number of operations in this case; this test
+slows down the case of larger dividends.  inv20u assumes the case of a such
+a small dividend to be unlikely, and inv20l assumes it to be likely.
+
+@item -mdivsi3_libfunc=@var{name}
+@opindex mdivsi3_libfunc=@var{name}
+Set the name of the library function used for 32 bit signed division to
+@var{name}.  This only affect the name used in the call and inv:call
+division strategies, and the compiler will still expect the same
+sets of input/output/clobbered registers as if this option was not present.
+
+@item -mfixed-range=@var{register-range}
+@opindex mfixed-range
+Generate code treating the given register range as fixed registers.
+A fixed register is one that the register allocator can not use.  This is
+useful when compiling kernel code.  A register range is specified as
+two registers separated by a dash.  Multiple register ranges can be
+specified separated by a comma.
+
+@item -madjust-unroll
+@opindex madjust-unroll
+Throttle unrolling to avoid thrashing target registers.
+This option only has an effect if the gcc code base supports the
+TARGET_ADJUST_UNROLL_MAX target hook.
+
+@item -mindexed-addressing
+@opindex mindexed-addressing
+Enable the use of the indexed addressing mode for SHmedia32/SHcompact.
+This is only safe if the hardware and/or OS implement 32 bit wrap-around
+semantics for the indexed addressing mode.  The architecture allows the
+implementation of processors with 64 bit MMU, which the OS could use to
+get 32 bit addressing, but since no current hardware implementation supports
+this or any other way to make the indexed addressing mode safe to use in
+the 32 bit ABI, the default is -mno-indexed-addressing.
+
+@item -mgettrcost=@var{number}
+@opindex mgettrcost=@var{number}
+Set the cost assumed for the gettr instruction to @var{number}.
+The default is 2 if @option{-mpt-fixed} is in effect, 100 otherwise.
+
+@item -mpt-fixed
+@opindex mpt-fixed
+Assume pt* instructions won't trap.  This will generally generate better
+scheduled code, but is unsafe on current hardware.  The current architecture
+definition says that ptabs and ptrel trap when the target anded with 3 is 3.
+This has the unintentional effect of making it unsafe to schedule ptabs /
+ptrel before a branch, or hoist it out of a loop.  For example,
+__do_global_ctors, a part of libgcc that runs constructors at program
+startup, calls functions in a list which is delimited by @minus{}1.  With the
+-mpt-fixed option, the ptabs will be done before testing against @minus{}1.
+That means that all the constructors will be run a bit quicker, but when
+the loop comes to the end of the list, the program crashes because ptabs
+loads @minus{}1 into a target register.  Since this option is unsafe for any
+hardware implementing the current architecture specification, the default
+is -mno-pt-fixed.  Unless the user specifies a specific cost with
+@option{-mgettrcost}, -mno-pt-fixed also implies @option{-mgettrcost=100};
+this deters register allocation using target registers for storing
+ordinary integers.
+
+@item -minvalid-symbols
+@opindex minvalid-symbols
+Assume symbols might be invalid.  Ordinary function symbols generated by
+the compiler will always be valid to load with movi/shori/ptabs or
+movi/shori/ptrel, but with assembler and/or linker tricks it is possible
+to generate symbols that will cause ptabs / ptrel to trap.
+This option is only meaningful when @option{-mno-pt-fixed} is in effect.
+It will then prevent cross-basic-block cse, hoisting and most scheduling
+of symbol loads.  The default is @option{-mno-invalid-symbols}.
+@end table
+
+@node SPARC Options
+@subsection SPARC Options
+@cindex SPARC options
+
+These @samp{-m} options are supported on the SPARC:
+
+@table @gcctabopt
+@item -mno-app-regs
+@itemx -mapp-regs
+@opindex mno-app-regs
+@opindex mapp-regs
+Specify @option{-mapp-regs} to generate output using the global registers
+2 through 4, which the SPARC SVR4 ABI reserves for applications.  This
+is the default.
+
+To be fully SVR4 ABI compliant at the cost of some performance loss,
+specify @option{-mno-app-regs}.  You should compile libraries and system
+software with this option.
+
+@item -mfpu
+@itemx -mhard-float
+@opindex mfpu
+@opindex mhard-float
+Generate output containing floating point instructions.  This is the
+default.
+
+@item -mno-fpu
+@itemx -msoft-float
+@opindex mno-fpu
+@opindex msoft-float
+Generate output containing library calls for floating point.
+@strong{Warning:} the requisite libraries are not available for all SPARC
+targets.  Normally the facilities of the machine's usual C compiler are
+used, but this cannot be done directly in cross-compilation.  You must make
+your own arrangements to provide suitable library functions for
+cross-compilation.  The embedded targets @samp{sparc-*-aout} and
+@samp{sparclite-*-*} do provide software floating point support.
+
+@option{-msoft-float} changes the calling convention in the output file;
+therefore, it is only useful if you compile @emph{all} of a program with
+this option.  In particular, you need to compile @file{libgcc.a}, the
+library that comes with GCC, with @option{-msoft-float} in order for
+this to work.
+
+@item -mhard-quad-float
+@opindex mhard-quad-float
+Generate output containing quad-word (long double) floating point
+instructions.
+
+@item -msoft-quad-float
+@opindex msoft-quad-float
+Generate output containing library calls for quad-word (long double)
+floating point instructions.  The functions called are those specified
+in the SPARC ABI@.  This is the default.
+
+As of this writing, there are no SPARC implementations that have hardware
+support for the quad-word floating point instructions.  They all invoke
+a trap handler for one of these instructions, and then the trap handler
+emulates the effect of the instruction.  Because of the trap handler overhead,
+this is much slower than calling the ABI library routines.  Thus the
+@option{-msoft-quad-float} option is the default.
+
+@item -mno-unaligned-doubles
+@itemx -munaligned-doubles
+@opindex mno-unaligned-doubles
+@opindex munaligned-doubles
+Assume that doubles have 8 byte alignment.  This is the default.
+
+With @option{-munaligned-doubles}, GCC assumes that doubles have 8 byte
+alignment only if they are contained in another type, or if they have an
+absolute address.  Otherwise, it assumes they have 4 byte alignment.
+Specifying this option avoids some rare compatibility problems with code
+generated by other compilers.  It is not the default because it results
+in a performance loss, especially for floating point code.
+
+@item -mno-faster-structs
+@itemx -mfaster-structs
+@opindex mno-faster-structs
+@opindex mfaster-structs
+With @option{-mfaster-structs}, the compiler assumes that structures
+should have 8 byte alignment.  This enables the use of pairs of
+@code{ldd} and @code{std} instructions for copies in structure
+assignment, in place of twice as many @code{ld} and @code{st} pairs.
+However, the use of this changed alignment directly violates the SPARC
+ABI@.  Thus, it's intended only for use on targets where the developer
+acknowledges that their resulting code will not be directly in line with
+the rules of the ABI@.
+
+@item -mimpure-text
+@opindex mimpure-text
+@option{-mimpure-text}, used in addition to @option{-shared}, tells
+the compiler to not pass @option{-z text} to the linker when linking a
+shared object.  Using this option, you can link position-dependent
+code into a shared object.
+
+@option{-mimpure-text} suppresses the ``relocations remain against
+allocatable but non-writable sections'' linker error message.
+However, the necessary relocations will trigger copy-on-write, and the
+shared object is not actually shared across processes.  Instead of
+using @option{-mimpure-text}, you should compile all source code with
+@option{-fpic} or @option{-fPIC}.
+
+This option is only available on SunOS and Solaris.
+
+@item -mcpu=@var{cpu_type}
+@opindex mcpu
+Set the instruction set, register set, and instruction scheduling parameters
+for machine type @var{cpu_type}.  Supported values for @var{cpu_type} are
+@samp{v7}, @samp{cypress}, @samp{v8}, @samp{supersparc}, @samp{sparclite},
+@samp{f930}, @samp{f934}, @samp{hypersparc}, @samp{sparclite86x},
+@samp{sparclet}, @samp{tsc701}, @samp{v9}, @samp{ultrasparc},
+@samp{ultrasparc3}, @samp{niagara} and @samp{niagara2}.
+
+Default instruction scheduling parameters are used for values that select
+an architecture and not an implementation.  These are @samp{v7}, @samp{v8},
+@samp{sparclite}, @samp{sparclet}, @samp{v9}.
+
+Here is a list of each supported architecture and their supported
+implementations.
+
+@smallexample
+    v7:             cypress
+    v8:             supersparc, hypersparc
+    sparclite:      f930, f934, sparclite86x
+    sparclet:       tsc701
+    v9:             ultrasparc, ultrasparc3, niagara, niagara2
+@end smallexample
+
+By default (unless configured otherwise), GCC generates code for the V7
+variant of the SPARC architecture.  With @option{-mcpu=cypress}, the compiler
+additionally optimizes it for the Cypress CY7C602 chip, as used in the
+SPARCStation/SPARCServer 3xx series.  This is also appropriate for the older
+SPARCStation 1, 2, IPX etc.
+
+With @option{-mcpu=v8}, GCC generates code for the V8 variant of the SPARC
+architecture.  The only difference from V7 code is that the compiler emits
+the integer multiply and integer divide instructions which exist in SPARC-V8
+but not in SPARC-V7.  With @option{-mcpu=supersparc}, the compiler additionally
+optimizes it for the SuperSPARC chip, as used in the SPARCStation 10, 1000 and
+2000 series.
+
+With @option{-mcpu=sparclite}, GCC generates code for the SPARClite variant of
+the SPARC architecture.  This adds the integer multiply, integer divide step
+and scan (@code{ffs}) instructions which exist in SPARClite but not in SPARC-V7.
+With @option{-mcpu=f930}, the compiler additionally optimizes it for the
+Fujitsu MB86930 chip, which is the original SPARClite, with no FPU@.  With
+@option{-mcpu=f934}, the compiler additionally optimizes it for the Fujitsu
+MB86934 chip, which is the more recent SPARClite with FPU@.
+
+With @option{-mcpu=sparclet}, GCC generates code for the SPARClet variant of
+the SPARC architecture.  This adds the integer multiply, multiply/accumulate,
+integer divide step and scan (@code{ffs}) instructions which exist in SPARClet
+but not in SPARC-V7.  With @option{-mcpu=tsc701}, the compiler additionally
+optimizes it for the TEMIC SPARClet chip.
+
+With @option{-mcpu=v9}, GCC generates code for the V9 variant of the SPARC
+architecture.  This adds 64-bit integer and floating-point move instructions,
+3 additional floating-point condition code registers and conditional move
+instructions.  With @option{-mcpu=ultrasparc}, the compiler additionally
+optimizes it for the Sun UltraSPARC I/II/IIi chips.  With
+@option{-mcpu=ultrasparc3}, the compiler additionally optimizes it for the
+Sun UltraSPARC III/III+/IIIi/IIIi+/IV/IV+ chips.  With
+@option{-mcpu=niagara}, the compiler additionally optimizes it for
+Sun UltraSPARC T1 chips.  With @option{-mcpu=niagara2}, the compiler
+additionally optimizes it for Sun UltraSPARC T2 chips.
+
+@item -mtune=@var{cpu_type}
+@opindex mtune
+Set the instruction scheduling parameters for machine type
+@var{cpu_type}, but do not set the instruction set or register set that the
+option @option{-mcpu=@var{cpu_type}} would.
+
+The same values for @option{-mcpu=@var{cpu_type}} can be used for
+@option{-mtune=@var{cpu_type}}, but the only useful values are those
+that select a particular cpu implementation.  Those are @samp{cypress},
+@samp{supersparc}, @samp{hypersparc}, @samp{f930}, @samp{f934},
+@samp{sparclite86x}, @samp{tsc701}, @samp{ultrasparc},
+@samp{ultrasparc3}, @samp{niagara}, and @samp{niagara2}.
+
+@item -mv8plus
+@itemx -mno-v8plus
+@opindex mv8plus
+@opindex mno-v8plus
+With @option{-mv8plus}, GCC generates code for the SPARC-V8+ ABI@.  The
+difference from the V8 ABI is that the global and out registers are
+considered 64-bit wide.  This is enabled by default on Solaris in 32-bit
+mode for all SPARC-V9 processors.
+
+@item -mvis
+@itemx -mno-vis
+@opindex mvis
+@opindex mno-vis
+With @option{-mvis}, GCC generates code that takes advantage of the UltraSPARC
+Visual Instruction Set extensions.  The default is @option{-mno-vis}.
+@end table
+
+These @samp{-m} options are supported in addition to the above
+on SPARC-V9 processors in 64-bit environments:
+
+@table @gcctabopt
+@item -mlittle-endian
+@opindex mlittle-endian
+Generate code for a processor running in little-endian mode.  It is only
+available for a few configurations and most notably not on Solaris and Linux.
+
+@item -m32
+@itemx -m64
+@opindex m32
+@opindex m64
+Generate code for a 32-bit or 64-bit environment.
+The 32-bit environment sets int, long and pointer to 32 bits.
+The 64-bit environment sets int to 32 bits and long and pointer
+to 64 bits.
+
+@item -mcmodel=medlow
+@opindex mcmodel=medlow
+Generate code for the Medium/Low code model: 64-bit addresses, programs
+must be linked in the low 32 bits of memory.  Programs can be statically
+or dynamically linked.
+
+@item -mcmodel=medmid
+@opindex mcmodel=medmid
+Generate code for the Medium/Middle code model: 64-bit addresses, programs
+must be linked in the low 44 bits of memory, the text and data segments must
+be less than 2GB in size and the data segment must be located within 2GB of
+the text segment.
+
+@item -mcmodel=medany
+@opindex mcmodel=medany
+Generate code for the Medium/Anywhere code model: 64-bit addresses, programs
+may be linked anywhere in memory, the text and data segments must be less
+than 2GB in size and the data segment must be located within 2GB of the
+text segment.
+
+@item -mcmodel=embmedany
+@opindex mcmodel=embmedany
+Generate code for the Medium/Anywhere code model for embedded systems:
+64-bit addresses, the text and data segments must be less than 2GB in
+size, both starting anywhere in memory (determined at link time).  The
+global register %g4 points to the base of the data segment.  Programs
+are statically linked and PIC is not supported.
+
+@item -mstack-bias
+@itemx -mno-stack-bias
+@opindex mstack-bias
+@opindex mno-stack-bias
+With @option{-mstack-bias}, GCC assumes that the stack pointer, and
+frame pointer if present, are offset by @minus{}2047 which must be added back
+when making stack frame references.  This is the default in 64-bit mode.
+Otherwise, assume no such offset is present.
+@end table
+
+These switches are supported in addition to the above on Solaris:
+
+@table @gcctabopt
+@item -threads
+@opindex threads
+Add support for multithreading using the Solaris threads library.  This
+option sets flags for both the preprocessor and linker.  This option does
+not affect the thread safety of object code produced by the compiler or
+that of libraries supplied with it.
+
+@item -pthreads
+@opindex pthreads
+Add support for multithreading using the POSIX threads library.  This
+option sets flags for both the preprocessor and linker.  This option does
+not affect the thread safety of object code produced  by the compiler or
+that of libraries supplied with it.
+
+@item -pthread
+@opindex pthread
+This is a synonym for @option{-pthreads}.
+@end table
+
+@node SPU Options
+@subsection SPU Options
+@cindex SPU options
+
+These @samp{-m} options are supported on the SPU:
+
+@table @gcctabopt
+@item -mwarn-reloc
+@itemx -merror-reloc
+@opindex mwarn-reloc
+@opindex merror-reloc
+
+The loader for SPU does not handle dynamic relocations.  By default, GCC
+will give an error when it generates code that requires a dynamic
+relocation.  @option{-mno-error-reloc} disables the error,
+@option{-mwarn-reloc} will generate a warning instead.
+
+@item -msafe-dma
+@itemx -munsafe-dma
+@opindex msafe-dma
+@opindex munsafe-dma
+
+Instructions which initiate or test completion of DMA must not be
+reordered with respect to loads and stores of the memory which is being
+accessed.  Users typically address this problem using the volatile
+keyword, but that can lead to inefficient code in places where the
+memory is known to not change.  Rather than mark the memory as volatile
+we treat the DMA instructions as potentially effecting all memory.  With
+@option{-munsafe-dma} users must use the volatile keyword to protect
+memory accesses.
+
+@item -mbranch-hints
+@opindex mbranch-hints
+
+By default, GCC will generate a branch hint instruction to avoid
+pipeline stalls for always taken or probably taken branches.  A hint
+will not be generated closer than 8 instructions away from its branch.
+There is little reason to disable them, except for debugging purposes,
+or to make an object a little bit smaller.
+
+@item -msmall-mem
+@itemx -mlarge-mem
+@opindex msmall-mem
+@opindex mlarge-mem
+
+By default, GCC generates code assuming that addresses are never larger
+than 18 bits.  With @option{-mlarge-mem} code is generated that assumes
+a full 32 bit address.
+
+@item -mstdmain
+@opindex mstdmain
+
+By default, GCC links against startup code that assumes the SPU-style
+main function interface (which has an unconventional parameter list).
+With @option{-mstdmain}, GCC will link your program against startup
+code that assumes a C99-style interface to @code{main}, including a
+local copy of @code{argv} strings.
+
+@item -mfixed-range=@var{register-range}
+@opindex mfixed-range
+Generate code treating the given register range as fixed registers.
+A fixed register is one that the register allocator can not use.  This is
+useful when compiling kernel code.  A register range is specified as
+two registers separated by a dash.  Multiple register ranges can be
+specified separated by a comma.
+
+@item -mdual-nops
+@itemx -mdual-nops=@var{n}
+@opindex mdual-nops
+By default, GCC will insert nops to increase dual issue when it expects
+it to increase performance.  @var{n} can be a value from 0 to 10.  A
+smaller @var{n} will insert fewer nops.  10 is the default, 0 is the
+same as @option{-mno-dual-nops}.  Disabled with @option{-Os}.
+
+@item -mhint-max-nops=@var{n}
+@opindex mhint-max-nops
+Maximum number of nops to insert for a branch hint.  A branch hint must
+be at least 8 instructions away from the branch it is effecting.  GCC
+will insert up to @var{n} nops to enforce this, otherwise it will not
+generate the branch hint.
+
+@item -mhint-max-distance=@var{n}
+@opindex mhint-max-distance
+The encoding of the branch hint instruction limits the hint to be within
+256 instructions of the branch it is effecting.  By default, GCC makes
+sure it is within 125. 
+
+@item -msafe-hints
+@opindex msafe-hints
+Work around a hardware bug which causes the SPU to stall indefinitely.
+By default, GCC will insert the @code{hbrp} instruction to make sure
+this stall won't happen.
+
+@end table
+
+@node System V Options
+@subsection Options for System V
+
+These additional options are available on System V Release 4 for
+compatibility with other compilers on those systems:
+
+@table @gcctabopt
+@item -G
+@opindex G
+Create a shared object.
+It is recommended that @option{-symbolic} or @option{-shared} be used instead.
+
+@item -Qy
+@opindex Qy
+Identify the versions of each tool used by the compiler, in a
+@code{.ident} assembler directive in the output.
+
+@item -Qn
+@opindex Qn
+Refrain from adding @code{.ident} directives to the output file (this is
+the default).
+
+@item -YP,@var{dirs}
+@opindex YP
+Search the directories @var{dirs}, and no others, for libraries
+specified with @option{-l}.
+
+@item -Ym,@var{dir}
+@opindex Ym
+Look in the directory @var{dir} to find the M4 preprocessor.
+The assembler uses this option.
+@c This is supposed to go with a -Yd for predefined M4 macro files, but
+@c the generic assembler that comes with Solaris takes just -Ym.
+@end table
+
+@node V850 Options
+@subsection V850 Options
+@cindex V850 Options
+
+These @samp{-m} options are defined for V850 implementations:
+
+@table @gcctabopt
+@item -mlong-calls
+@itemx -mno-long-calls
+@opindex mlong-calls
+@opindex mno-long-calls
+Treat all calls as being far away (near).  If calls are assumed to be
+far away, the compiler will always load the functions address up into a
+register, and call indirect through the pointer.
+
+@item -mno-ep
+@itemx -mep
+@opindex mno-ep
+@opindex mep
+Do not optimize (do optimize) basic blocks that use the same index
+pointer 4 or more times to copy pointer into the @code{ep} register, and
+use the shorter @code{sld} and @code{sst} instructions.  The @option{-mep}
+option is on by default if you optimize.
+
+@item -mno-prolog-function
+@itemx -mprolog-function
+@opindex mno-prolog-function
+@opindex mprolog-function
+Do not use (do use) external functions to save and restore registers
+at the prologue and epilogue of a function.  The external functions
+are slower, but use less code space if more than one function saves
+the same number of registers.  The @option{-mprolog-function} option
+is on by default if you optimize.
+
+@item -mspace
+@opindex mspace
+Try to make the code as small as possible.  At present, this just turns
+on the @option{-mep} and @option{-mprolog-function} options.
+
+@item -mtda=@var{n}
+@opindex mtda
+Put static or global variables whose size is @var{n} bytes or less into
+the tiny data area that register @code{ep} points to.  The tiny data
+area can hold up to 256 bytes in total (128 bytes for byte references).
+
+@item -msda=@var{n}
+@opindex msda
+Put static or global variables whose size is @var{n} bytes or less into
+the small data area that register @code{gp} points to.  The small data
+area can hold up to 64 kilobytes.
+
+@item -mzda=@var{n}
+@opindex mzda
+Put static or global variables whose size is @var{n} bytes or less into
+the first 32 kilobytes of memory.
+
+@item -mv850
+@opindex mv850
+Specify that the target processor is the V850.
+
+@item -mbig-switch
+@opindex mbig-switch
+Generate code suitable for big switch tables.  Use this option only if
+the assembler/linker complain about out of range branches within a switch
+table.
+
+@item -mapp-regs
+@opindex mapp-regs
+This option will cause r2 and r5 to be used in the code generated by
+the compiler.  This setting is the default.
+
+@item -mno-app-regs
+@opindex mno-app-regs
+This option will cause r2 and r5 to be treated as fixed registers.
+
+@item -mv850e1
+@opindex mv850e1
+Specify that the target processor is the V850E1.  The preprocessor
+constants @samp{__v850e1__} and @samp{__v850e__} will be defined if
+this option is used.
+
+@item -mv850e
+@opindex mv850e
+Specify that the target processor is the V850E@.  The preprocessor
+constant @samp{__v850e__} will be defined if this option is used.
+
+If neither @option{-mv850} nor @option{-mv850e} nor @option{-mv850e1}
+are defined then a default target processor will be chosen and the
+relevant @samp{__v850*__} preprocessor constant will be defined.
+
+The preprocessor constants @samp{__v850} and @samp{__v851__} are always
+defined, regardless of which processor variant is the target.
+
+@item -mdisable-callt
+@opindex mdisable-callt
+This option will suppress generation of the CALLT instruction for the
+v850e and v850e1 flavors of the v850 architecture.  The default is
+@option{-mno-disable-callt} which allows the CALLT instruction to be used.
+
+@end table
+
+@node VAX Options
+@subsection VAX Options
+@cindex VAX options
+
+These @samp{-m} options are defined for the VAX:
+
+@table @gcctabopt
+@item -munix
+@opindex munix
+Do not output certain jump instructions (@code{aobleq} and so on)
+that the Unix assembler for the VAX cannot handle across long
+ranges.
+
+@item -mgnu
+@opindex mgnu
+Do output those jump instructions, on the assumption that you
+will assemble with the GNU assembler.
+
+@item -mg
+@opindex mg
+Output code for g-format floating point numbers instead of d-format.
+@end table
+
+@node VxWorks Options
+@subsection VxWorks Options
+@cindex VxWorks Options
+
+The options in this section are defined for all VxWorks targets.
+Options specific to the target hardware are listed with the other
+options for that target.
+
+@table @gcctabopt
+@item -mrtp
+@opindex mrtp
+GCC can generate code for both VxWorks kernels and real time processes
+(RTPs).  This option switches from the former to the latter.  It also
+defines the preprocessor macro @code{__RTP__}.
+
+@item -non-static
+@opindex non-static
+Link an RTP executable against shared libraries rather than static
+libraries.  The options @option{-static} and @option{-shared} can
+also be used for RTPs (@pxref{Link Options}); @option{-static}
+is the default.
+
+@item -Bstatic
+@itemx -Bdynamic
+@opindex Bstatic
+@opindex Bdynamic
+These options are passed down to the linker.  They are defined for
+compatibility with Diab.
+
+@item -Xbind-lazy
+@opindex Xbind-lazy
+Enable lazy binding of function calls.  This option is equivalent to
+@option{-Wl,-z,now} and is defined for compatibility with Diab.
+
+@item -Xbind-now
+@opindex Xbind-now
+Disable lazy binding of function calls.  This option is the default and
+is defined for compatibility with Diab.
+@end table
+
+@node x86-64 Options
+@subsection x86-64 Options
+@cindex x86-64 options
+
+These are listed under @xref{i386 and x86-64 Options}.
+
+@node i386 and x86-64 Windows Options
+@subsection i386 and x86-64 Windows Options
+@cindex i386 and x86-64 Windows Options
+
+These additional options are available for Windows targets:
+
+@table @gcctabopt
+@item -mconsole
+@opindex mconsole
+This option is available for Cygwin and MinGW targets.  It
+specifies that a console application is to be generated, by
+instructing the linker to set the PE header subsystem type
+required for console applications.
+This is the default behaviour for Cygwin and MinGW targets.
+
+@item -mcygwin
+@opindex mcygwin
+This option is available for Cygwin targets.  It specifies that
+the Cygwin internal interface is to be used for predefined
+preprocessor macros, C runtime libraries and related linker
+paths and options.  For Cygwin targets this is the default behaviour.
+This option is deprecated and will be removed in a future release.
+
+@item -mno-cygwin
+@opindex mno-cygwin
+This option is available for Cygwin targets.  It specifies that
+the MinGW internal interface is to be used instead of Cygwin's, by
+setting MinGW-related predefined macros and linker paths and default
+library options.
+This option is deprecated and will be removed in a future release.
+
+@item -mdll
+@opindex mdll
+This option is available for Cygwin and MinGW targets.  It
+specifies that a DLL - a dynamic link library - is to be
+generated, enabling the selection of the required runtime
+startup object and entry point.
+
+@item -mnop-fun-dllimport
+@opindex mnop-fun-dllimport
+This option is available for Cygwin and MinGW targets.  It
+specifies that the dllimport attribute should be ignored.
+
+@item -mthread
+@opindex mthread
+This option is available for MinGW targets. It specifies
+that MinGW-specific thread support is to be used.
+
+@item -mwin32
+@opindex mwin32
+This option is available for Cygwin and MinGW targets.  It
+specifies that the typical Windows pre-defined macros are to
+be set in the pre-processor, but does not influence the choice
+of runtime library/startup code.
+
+@item -mwindows
+@opindex mwindows
+This option is available for Cygwin and MinGW targets.  It
+specifies that a GUI application is to be generated by
+instructing the linker to set the PE header subsystem type
+appropriately.
+@end table
+
+See also under @ref{i386 and x86-64 Options} for standard options.
+
+@node Xstormy16 Options
+@subsection Xstormy16 Options
+@cindex Xstormy16 Options
+
+These options are defined for Xstormy16:
+
+@table @gcctabopt
+@item -msim
+@opindex msim
+Choose startup files and linker script suitable for the simulator.
+@end table
+
+@node Xtensa Options
+@subsection Xtensa Options
+@cindex Xtensa Options
+
+These options are supported for Xtensa targets:
+
+@table @gcctabopt
+@item -mconst16
+@itemx -mno-const16
+@opindex mconst16
+@opindex mno-const16
+Enable or disable use of @code{CONST16} instructions for loading
+constant values.  The @code{CONST16} instruction is currently not a
+standard option from Tensilica.  When enabled, @code{CONST16}
+instructions are always used in place of the standard @code{L32R}
+instructions.  The use of @code{CONST16} is enabled by default only if
+the @code{L32R} instruction is not available.
+
+@item -mfused-madd
+@itemx -mno-fused-madd
+@opindex mfused-madd
+@opindex mno-fused-madd
+Enable or disable use of fused multiply/add and multiply/subtract
+instructions in the floating-point option.  This has no effect if the
+floating-point option is not also enabled.  Disabling fused multiply/add
+and multiply/subtract instructions forces the compiler to use separate
+instructions for the multiply and add/subtract operations.  This may be
+desirable in some cases where strict IEEE 754-compliant results are
+required: the fused multiply add/subtract instructions do not round the
+intermediate result, thereby producing results with @emph{more} bits of
+precision than specified by the IEEE standard.  Disabling fused multiply
+add/subtract instructions also ensures that the program output is not
+sensitive to the compiler's ability to combine multiply and add/subtract
+operations.
+
+@item -mserialize-volatile
+@itemx -mno-serialize-volatile
+@opindex mserialize-volatile
+@opindex mno-serialize-volatile
+When this option is enabled, GCC inserts @code{MEMW} instructions before
+@code{volatile} memory references to guarantee sequential consistency.
+The default is @option{-mserialize-volatile}.  Use
+@option{-mno-serialize-volatile} to omit the @code{MEMW} instructions.
+
+@item -mtext-section-literals
+@itemx -mno-text-section-literals
+@opindex mtext-section-literals
+@opindex mno-text-section-literals
+Control the treatment of literal pools.  The default is
+@option{-mno-text-section-literals}, which places literals in a separate
+section in the output file.  This allows the literal pool to be placed
+in a data RAM/ROM, and it also allows the linker to combine literal
+pools from separate object files to remove redundant literals and
+improve code size.  With @option{-mtext-section-literals}, the literals
+are interspersed in the text section in order to keep them as close as
+possible to their references.  This may be necessary for large assembly
+files.
+
+@item -mtarget-align
+@itemx -mno-target-align
+@opindex mtarget-align
+@opindex mno-target-align
+When this option is enabled, GCC instructs the assembler to
+automatically align instructions to reduce branch penalties at the
+expense of some code density.  The assembler attempts to widen density
+instructions to align branch targets and the instructions following call
+instructions.  If there are not enough preceding safe density
+instructions to align a target, no widening will be performed.  The
+default is @option{-mtarget-align}.  These options do not affect the
+treatment of auto-aligned instructions like @code{LOOP}, which the
+assembler will always align, either by widening density instructions or
+by inserting no-op instructions.
+
+@item -mlongcalls
+@itemx -mno-longcalls
+@opindex mlongcalls
+@opindex mno-longcalls
+When this option is enabled, GCC instructs the assembler to translate
+direct calls to indirect calls unless it can determine that the target
+of a direct call is in the range allowed by the call instruction.  This
+translation typically occurs for calls to functions in other source
+files.  Specifically, the assembler translates a direct @code{CALL}
+instruction into an @code{L32R} followed by a @code{CALLX} instruction.
+The default is @option{-mno-longcalls}.  This option should be used in
+programs where the call target can potentially be out of range.  This
+option is implemented in the assembler, not the compiler, so the
+assembly code generated by GCC will still show direct call
+instructions---look at the disassembled object code to see the actual
+instructions.  Note that the assembler will use an indirect call for
+every cross-file call, not just those that really will be out of range.
+@end table
+
+@node zSeries Options
+@subsection zSeries Options
+@cindex zSeries options
+
+These are listed under @xref{S/390 and zSeries Options}.
+
+@node Code Gen Options
+@section Options for Code Generation Conventions
+@cindex code generation conventions
+@cindex options, code generation
+@cindex run-time options
+
+These machine-independent options control the interface conventions
+used in code generation.
+
+Most of them have both positive and negative forms; the negative form
+of @option{-ffoo} would be @option{-fno-foo}.  In the table below, only
+one of the forms is listed---the one which is not the default.  You
+can figure out the other form by either removing @samp{no-} or adding
+it.
+
+@table @gcctabopt
+@item -fbounds-check
+@opindex fbounds-check
+For front-ends that support it, generate additional code to check that
+indices used to access arrays are within the declared range.  This is
+currently only supported by the Java and Fortran front-ends, where
+this option defaults to true and false respectively.
+
+@item -ftrapv
+@opindex ftrapv
+This option generates traps for signed overflow on addition, subtraction,
+multiplication operations.
+
+@item -fwrapv
+@opindex fwrapv
+This option instructs the compiler to assume that signed arithmetic
+overflow of addition, subtraction and multiplication wraps around
+using twos-complement representation.  This flag enables some optimizations
+and disables others.  This option is enabled by default for the Java
+front-end, as required by the Java language specification.
+
+@item -fexceptions
+@opindex fexceptions
+Enable exception handling.  Generates extra code needed to propagate
+exceptions.  For some targets, this implies GCC will generate frame
+unwind information for all functions, which can produce significant data
+size overhead, although it does not affect execution.  If you do not
+specify this option, GCC will enable it by default for languages like
+C++ which normally require exception handling, and disable it for
+languages like C that do not normally require it.  However, you may need
+to enable this option when compiling C code that needs to interoperate
+properly with exception handlers written in C++.  You may also wish to
+disable this option if you are compiling older C++ programs that don't
+use exception handling.
+
+@item -fnon-call-exceptions
+@opindex fnon-call-exceptions
+Generate code that allows trapping instructions to throw exceptions.
+Note that this requires platform-specific runtime support that does
+not exist everywhere.  Moreover, it only allows @emph{trapping}
+instructions to throw exceptions, i.e.@: memory references or floating
+point instructions.  It does not allow exceptions to be thrown from
+arbitrary signal handlers such as @code{SIGALRM}.
+
+@item -funwind-tables
+@opindex funwind-tables
+Similar to @option{-fexceptions}, except that it will just generate any needed
+static data, but will not affect the generated code in any other way.
+You will normally not enable this option; instead, a language processor
+that needs this handling would enable it on your behalf.
+
+@item -fasynchronous-unwind-tables
+@opindex fasynchronous-unwind-tables
+Generate unwind table in dwarf2 format, if supported by target machine.  The
+table is exact at each instruction boundary, so it can be used for stack
+unwinding from asynchronous events (such as debugger or garbage collector).
+
+@item -fpcc-struct-return
+@opindex fpcc-struct-return
+Return ``short'' @code{struct} and @code{union} values in memory like
+longer ones, rather than in registers.  This convention is less
+efficient, but it has the advantage of allowing intercallability between
+GCC-compiled files and files compiled with other compilers, particularly
+the Portable C Compiler (pcc).
+
+The precise convention for returning structures in memory depends
+on the target configuration macros.
+
+Short structures and unions are those whose size and alignment match
+that of some integer type.
+
+@strong{Warning:} code compiled with the @option{-fpcc-struct-return}
+switch is not binary compatible with code compiled with the
+@option{-freg-struct-return} switch.
+Use it to conform to a non-default application binary interface.
+
+@item -freg-struct-return
+@opindex freg-struct-return
+Return @code{struct} and @code{union} values in registers when possible.
+This is more efficient for small structures than
+@option{-fpcc-struct-return}.
+
+If you specify neither @option{-fpcc-struct-return} nor
+@option{-freg-struct-return}, GCC defaults to whichever convention is
+standard for the target.  If there is no standard convention, GCC
+defaults to @option{-fpcc-struct-return}, except on targets where GCC is
+the principal compiler.  In those cases, we can choose the standard, and
+we chose the more efficient register return alternative.
+
+@strong{Warning:} code compiled with the @option{-freg-struct-return}
+switch is not binary compatible with code compiled with the
+@option{-fpcc-struct-return} switch.
+Use it to conform to a non-default application binary interface.
+
+@item -fshort-enums
+@opindex fshort-enums
+Allocate to an @code{enum} type only as many bytes as it needs for the
+declared range of possible values.  Specifically, the @code{enum} type
+will be equivalent to the smallest integer type which has enough room.
+
+@strong{Warning:} the @option{-fshort-enums} switch causes GCC to generate
+code that is not binary compatible with code generated without that switch.
+Use it to conform to a non-default application binary interface.
+
+@item -fshort-double
+@opindex fshort-double
+Use the same size for @code{double} as for @code{float}.
+
+@strong{Warning:} the @option{-fshort-double} switch causes GCC to generate
+code that is not binary compatible with code generated without that switch.
+Use it to conform to a non-default application binary interface.
+
+@item -fshort-wchar
+@opindex fshort-wchar
+Override the underlying type for @samp{wchar_t} to be @samp{short
+unsigned int} instead of the default for the target.  This option is
+useful for building programs to run under WINE@.
+
+@strong{Warning:} the @option{-fshort-wchar} switch causes GCC to generate
+code that is not binary compatible with code generated without that switch.
+Use it to conform to a non-default application binary interface.
+
+@item -fno-common
+@opindex fno-common
+In C code, controls the placement of uninitialized global variables.
+Unix C compilers have traditionally permitted multiple definitions of
+such variables in different compilation units by placing the variables
+in a common block.  
+This is the behavior specified by @option{-fcommon}, and is the default 
+for GCC on most targets.  
+On the other hand, this behavior is not required by ISO C, and on some
+targets may carry a speed or code size penalty on variable references.
+The @option{-fno-common} option specifies that the compiler should place 
+uninitialized global variables in the data section of the object file,
+rather than generating them as common blocks.
+This has the effect that if the same variable is declared 
+(without @code{extern}) in two different compilations,
+you will get a multiple-definition error when you link them.
+In this case, you must compile with @option{-fcommon} instead.  
+Compiling with @option{-fno-common} is useful on targets for which 
+it provides better performance, or if you wish to verify that the
+program will work on other systems which always treat uninitialized
+variable declarations this way.
+
+@item -fno-ident
+@opindex fno-ident
+Ignore the @samp{#ident} directive.
+
+@item -finhibit-size-directive
+@opindex finhibit-size-directive
+Don't output a @code{.size} assembler directive, or anything else that
+would cause trouble if the function is split in the middle, and the
+two halves are placed at locations far apart in memory.  This option is
+used when compiling @file{crtstuff.c}; you should not need to use it
+for anything else.
+
+@item -fverbose-asm
+@opindex fverbose-asm
+Put extra commentary information in the generated assembly code to
+make it more readable.  This option is generally only of use to those
+who actually need to read the generated assembly code (perhaps while
+debugging the compiler itself).
+
+@option{-fno-verbose-asm}, the default, causes the
+extra information to be omitted and is useful when comparing two assembler
+files.
+
+@item -frecord-gcc-switches
+@opindex frecord-gcc-switches
+This switch causes the command line that was used to invoke the
+compiler to be recorded into the object file that is being created.
+This switch is only implemented on some targets and the exact format
+of the recording is target and binary file format dependent, but it
+usually takes the form of a section containing ASCII text.  This
+switch is related to the @option{-fverbose-asm} switch, but that
+switch only records information in the assembler output file as
+comments, so it never reaches the object file.
+
+@item -fpic
+@opindex fpic
+@cindex global offset table
+@cindex PIC
+Generate position-independent code (PIC) suitable for use in a shared
+library, if supported for the target machine.  Such code accesses all
+constant addresses through a global offset table (GOT)@.  The dynamic
+loader resolves the GOT entries when the program starts (the dynamic
+loader is not part of GCC; it is part of the operating system).  If
+the GOT size for the linked executable exceeds a machine-specific
+maximum size, you get an error message from the linker indicating that
+@option{-fpic} does not work; in that case, recompile with @option{-fPIC}
+instead.  (These maximums are 8k on the SPARC and 32k
+on the m68k and RS/6000.  The 386 has no such limit.)
+
+Position-independent code requires special support, and therefore works
+only on certain machines.  For the 386, GCC supports PIC for System V
+but not for the Sun 386i.  Code generated for the IBM RS/6000 is always
+position-independent.
+
+When this flag is set, the macros @code{__pic__} and @code{__PIC__}
+are defined to 1.
+
+@item -fPIC
+@opindex fPIC
+If supported for the target machine, emit position-independent code,
+suitable for dynamic linking and avoiding any limit on the size of the
+global offset table.  This option makes a difference on the m68k,
+PowerPC and SPARC@.
+
+Position-independent code requires special support, and therefore works
+only on certain machines.
+
+When this flag is set, the macros @code{__pic__} and @code{__PIC__}
+are defined to 2.
+
+@item -fpie
+@itemx -fPIE
+@opindex fpie
+@opindex fPIE
+These options are similar to @option{-fpic} and @option{-fPIC}, but
+generated position independent code can be only linked into executables.
+Usually these options are used when @option{-pie} GCC option will be
+used during linking.
+
+@option{-fpie} and @option{-fPIE} both define the macros
+@code{__pie__} and @code{__PIE__}.  The macros have the value 1
+for @option{-fpie} and 2 for @option{-fPIE}.
+
+@item -fno-jump-tables
+@opindex fno-jump-tables
+Do not use jump tables for switch statements even where it would be
+more efficient than other code generation strategies.  This option is
+of use in conjunction with @option{-fpic} or @option{-fPIC} for
+building code which forms part of a dynamic linker and cannot
+reference the address of a jump table.  On some targets, jump tables
+do not require a GOT and this option is not needed.
+
+@item -ffixed-@var{reg}
+@opindex ffixed
+Treat the register named @var{reg} as a fixed register; generated code
+should never refer to it (except perhaps as a stack pointer, frame
+pointer or in some other fixed role).
+
+@var{reg} must be the name of a register.  The register names accepted
+are machine-specific and are defined in the @code{REGISTER_NAMES}
+macro in the machine description macro file.
+
+This flag does not have a negative form, because it specifies a
+three-way choice.
+
+@item -fcall-used-@var{reg}
+@opindex fcall-used
+Treat the register named @var{reg} as an allocable register that is
+clobbered by function calls.  It may be allocated for temporaries or
+variables that do not live across a call.  Functions compiled this way
+will not save and restore the register @var{reg}.
+
+It is an error to used this flag with the frame pointer or stack pointer.
+Use of this flag for other registers that have fixed pervasive roles in
+the machine's execution model will produce disastrous results.
+
+This flag does not have a negative form, because it specifies a
+three-way choice.
+
+@item -fcall-saved-@var{reg}
+@opindex fcall-saved
+Treat the register named @var{reg} as an allocable register saved by
+functions.  It may be allocated even for temporaries or variables that
+live across a call.  Functions compiled this way will save and restore
+the register @var{reg} if they use it.
+
+It is an error to used this flag with the frame pointer or stack pointer.
+Use of this flag for other registers that have fixed pervasive roles in
+the machine's execution model will produce disastrous results.
+
+A different sort of disaster will result from the use of this flag for
+a register in which function values may be returned.
+
+This flag does not have a negative form, because it specifies a
+three-way choice.
+
+@item -fpack-struct[=@var{n}]
+@opindex fpack-struct
+Without a value specified, pack all structure members together without
+holes.  When a value is specified (which must be a small power of two), pack
+structure members according to this value, representing the maximum
+alignment (that is, objects with default alignment requirements larger than
+this will be output potentially unaligned at the next fitting location.
+
+@strong{Warning:} the @option{-fpack-struct} switch causes GCC to generate
+code that is not binary compatible with code generated without that switch.
+Additionally, it makes the code suboptimal.
+Use it to conform to a non-default application binary interface.
+
+@item -finstrument-functions
+@opindex finstrument-functions
+Generate instrumentation calls for entry and exit to functions.  Just
+after function entry and just before function exit, the following
+profiling functions will be called with the address of the current
+function and its call site.  (On some platforms,
+@code{__builtin_return_address} does not work beyond the current
+function, so the call site information may not be available to the
+profiling functions otherwise.)
+
+@smallexample
+void __cyg_profile_func_enter (void *this_fn,
+                               void *call_site);
+void __cyg_profile_func_exit  (void *this_fn,
+                               void *call_site);
+@end smallexample
+
+The first argument is the address of the start of the current function,
+which may be looked up exactly in the symbol table.
+
+This instrumentation is also done for functions expanded inline in other
+functions.  The profiling calls will indicate where, conceptually, the
+inline function is entered and exited.  This means that addressable
+versions of such functions must be available.  If all your uses of a
+function are expanded inline, this may mean an additional expansion of
+code size.  If you use @samp{extern inline} in your C code, an
+addressable version of such functions must be provided.  (This is
+normally the case anyways, but if you get lucky and the optimizer always
+expands the functions inline, you might have gotten away without
+providing static copies.)
+
+A function may be given the attribute @code{no_instrument_function}, in
+which case this instrumentation will not be done.  This can be used, for
+example, for the profiling functions listed above, high-priority
+interrupt routines, and any functions from which the profiling functions
+cannot safely be called (perhaps signal handlers, if the profiling
+routines generate output or allocate memory).
+
+@item -finstrument-functions-exclude-file-list=@var{file},@var{file},@dots{}
+@opindex finstrument-functions-exclude-file-list
+
+Set the list of functions that are excluded from instrumentation (see
+the description of @code{-finstrument-functions}).  If the file that
+contains a function definition matches with one of @var{file}, then
+that function is not instrumented.  The match is done on substrings:
+if the @var{file} parameter is a substring of the file name, it is
+considered to be a match.
+
+For example,
+@code{-finstrument-functions-exclude-file-list=/bits/stl,include/sys}
+will exclude any inline function defined in files whose pathnames
+contain @code{/bits/stl} or @code{include/sys}.
+
+If, for some reason, you want to include letter @code{','} in one of
+@var{sym}, write @code{'\,'}. For example,
+@code{-finstrument-functions-exclude-file-list='\,\,tmp'}
+(note the single quote surrounding the option).
+
+@item -finstrument-functions-exclude-function-list=@var{sym},@var{sym},@dots{}
+@opindex finstrument-functions-exclude-function-list
+
+This is similar to @code{-finstrument-functions-exclude-file-list},
+but this option sets the list of function names to be excluded from
+instrumentation.  The function name to be matched is its user-visible
+name, such as @code{vector<int> blah(const vector<int> &)}, not the
+internal mangled name (e.g., @code{_Z4blahRSt6vectorIiSaIiEE}).  The
+match is done on substrings: if the @var{sym} parameter is a substring
+of the function name, it is considered to be a match.
+
+@item -fstack-check
+@opindex fstack-check
+Generate code to verify that you do not go beyond the boundary of the
+stack.  You should specify this flag if you are running in an
+environment with multiple threads, but only rarely need to specify it in
+a single-threaded environment since stack overflow is automatically
+detected on nearly all systems if there is only one stack.
+
+Note that this switch does not actually cause checking to be done; the
+operating system or the language runtime must do that.  The switch causes
+generation of code to ensure that they see the stack being extended.
+
+You can additionally specify a string parameter: @code{no} means no
+checking, @code{generic} means force the use of old-style checking,
+@code{specific} means use the best checking method and is equivalent
+to bare @option{-fstack-check}.
+
+Old-style checking is a generic mechanism that requires no specific
+target support in the compiler but comes with the following drawbacks:
+
+@enumerate
+@item
+Modified allocation strategy for large objects: they will always be
+allocated dynamically if their size exceeds a fixed threshold.
+
+@item
+Fixed limit on the size of the static frame of functions: when it is
+topped by a particular function, stack checking is not reliable and
+a warning is issued by the compiler.
+
+@item
+Inefficiency: because of both the modified allocation strategy and the
+generic implementation, the performances of the code are hampered.
+@end enumerate
+
+Note that old-style stack checking is also the fallback method for
+@code{specific} if no target support has been added in the compiler.
+
+@item -fstack-limit-register=@var{reg}
+@itemx -fstack-limit-symbol=@var{sym}
+@itemx -fno-stack-limit
+@opindex fstack-limit-register
+@opindex fstack-limit-symbol
+@opindex fno-stack-limit
+Generate code to ensure that the stack does not grow beyond a certain value,
+either the value of a register or the address of a symbol.  If the stack
+would grow beyond the value, a signal is raised.  For most targets,
+the signal is raised before the stack overruns the boundary, so
+it is possible to catch the signal without taking special precautions.
+
+For instance, if the stack starts at absolute address @samp{0x80000000}
+and grows downwards, you can use the flags
+@option{-fstack-limit-symbol=__stack_limit} and
+@option{-Wl,--defsym,__stack_limit=0x7ffe0000} to enforce a stack limit
+of 128KB@.  Note that this may only work with the GNU linker.
+
+@cindex aliasing of parameters
+@cindex parameters, aliased
+@item -fargument-alias
+@itemx -fargument-noalias
+@itemx -fargument-noalias-global
+@itemx -fargument-noalias-anything
+@opindex fargument-alias
+@opindex fargument-noalias
+@opindex fargument-noalias-global
+@opindex fargument-noalias-anything
+Specify the possible relationships among parameters and between
+parameters and global data.
+
+@option{-fargument-alias} specifies that arguments (parameters) may
+alias each other and may alias global storage.@*
+@option{-fargument-noalias} specifies that arguments do not alias
+each other, but may alias global storage.@*
+@option{-fargument-noalias-global} specifies that arguments do not
+alias each other and do not alias global storage.
+@option{-fargument-noalias-anything} specifies that arguments do not
+alias any other storage.
+
+Each language will automatically use whatever option is required by
+the language standard.  You should not need to use these options yourself.
+
+@item -fleading-underscore
+@opindex fleading-underscore
+This option and its counterpart, @option{-fno-leading-underscore}, forcibly
+change the way C symbols are represented in the object file.  One use
+is to help link with legacy assembly code.
+
+@strong{Warning:} the @option{-fleading-underscore} switch causes GCC to
+generate code that is not binary compatible with code generated without that
+switch.  Use it to conform to a non-default application binary interface.
+Not all targets provide complete support for this switch.
+
+@item -ftls-model=@var{model}
+@opindex ftls-model
+Alter the thread-local storage model to be used (@pxref{Thread-Local}).
+The @var{model} argument should be one of @code{global-dynamic},
+@code{local-dynamic}, @code{initial-exec} or @code{local-exec}.
+
+The default without @option{-fpic} is @code{initial-exec}; with
+@option{-fpic} the default is @code{global-dynamic}.
+
+@item -fvisibility=@var{default|internal|hidden|protected}
+@opindex fvisibility
+Set the default ELF image symbol visibility to the specified option---all
+symbols will be marked with this unless overridden within the code.
+Using this feature can very substantially improve linking and
+load times of shared object libraries, produce more optimized
+code, provide near-perfect API export and prevent symbol clashes.
+It is @strong{strongly} recommended that you use this in any shared objects
+you distribute.
+
+Despite the nomenclature, @code{default} always means public ie;
+available to be linked against from outside the shared object.
+@code{protected} and @code{internal} are pretty useless in real-world
+usage so the only other commonly used option will be @code{hidden}.
+The default if @option{-fvisibility} isn't specified is
+@code{default}, i.e., make every
+symbol public---this causes the same behavior as previous versions of
+GCC@.
+
+A good explanation of the benefits offered by ensuring ELF
+symbols have the correct visibility is given by ``How To Write
+Shared Libraries'' by Ulrich Drepper (which can be found at
+@w{@uref{http://people.redhat.com/~drepper/}})---however a superior
+solution made possible by this option to marking things hidden when
+the default is public is to make the default hidden and mark things
+public.  This is the norm with DLL's on Windows and with @option{-fvisibility=hidden}
+and @code{__attribute__ ((visibility("default")))} instead of
+@code{__declspec(dllexport)} you get almost identical semantics with
+identical syntax.  This is a great boon to those working with
+cross-platform projects.
+
+For those adding visibility support to existing code, you may find
+@samp{#pragma GCC visibility} of use.  This works by you enclosing
+the declarations you wish to set visibility for with (for example)
+@samp{#pragma GCC visibility push(hidden)} and
+@samp{#pragma GCC visibility pop}.
+Bear in mind that symbol visibility should be viewed @strong{as
+part of the API interface contract} and thus all new code should
+always specify visibility when it is not the default ie; declarations
+only for use within the local DSO should @strong{always} be marked explicitly
+as hidden as so to avoid PLT indirection overheads---making this
+abundantly clear also aids readability and self-documentation of the code.
+Note that due to ISO C++ specification requirements, operator new and
+operator delete must always be of default visibility.
+
+Be aware that headers from outside your project, in particular system
+headers and headers from any other library you use, may not be
+expecting to be compiled with visibility other than the default.  You
+may need to explicitly say @samp{#pragma GCC visibility push(default)}
+before including any such headers.
+
+@samp{extern} declarations are not affected by @samp{-fvisibility}, so
+a lot of code can be recompiled with @samp{-fvisibility=hidden} with
+no modifications.  However, this means that calls to @samp{extern}
+functions with no explicit visibility will use the PLT, so it is more
+effective to use @samp{__attribute ((visibility))} and/or
+@samp{#pragma GCC visibility} to tell the compiler which @samp{extern}
+declarations should be treated as hidden.
+
+Note that @samp{-fvisibility} does affect C++ vague linkage
+entities. This means that, for instance, an exception class that will
+be thrown between DSOs must be explicitly marked with default
+visibility so that the @samp{type_info} nodes will be unified between
+the DSOs.
+
+An overview of these techniques, their benefits and how to use them
+is at @w{@uref{http://gcc.gnu.org/wiki/Visibility}}.
+
+@end table
+
+@c man end
+
+@node Environment Variables
+@section Environment Variables Affecting GCC
+@cindex environment variables
+
+@c man begin ENVIRONMENT
+This section describes several environment variables that affect how GCC
+operates.  Some of them work by specifying directories or prefixes to use
+when searching for various kinds of files.  Some are used to specify other
+aspects of the compilation environment.
+
+Note that you can also specify places to search using options such as
+@option{-B}, @option{-I} and @option{-L} (@pxref{Directory Options}).  These
+take precedence over places specified using environment variables, which
+in turn take precedence over those specified by the configuration of GCC@.
+@xref{Driver,, Controlling the Compilation Driver @file{gcc}, gccint,
+GNU Compiler Collection (GCC) Internals}.
+
+@table @env
+@item LANG
+@itemx LC_CTYPE
+@c @itemx LC_COLLATE
+@itemx LC_MESSAGES
+@c @itemx LC_MONETARY
+@c @itemx LC_NUMERIC
+@c @itemx LC_TIME
+@itemx LC_ALL
+@findex LANG
+@findex LC_CTYPE
+@c @findex LC_COLLATE
+@findex LC_MESSAGES
+@c @findex LC_MONETARY
+@c @findex LC_NUMERIC
+@c @findex LC_TIME
+@findex LC_ALL
+@cindex locale
+These environment variables control the way that GCC uses
+localization information that allow GCC to work with different
+national conventions.  GCC inspects the locale categories
+@env{LC_CTYPE} and @env{LC_MESSAGES} if it has been configured to do
+so.  These locale categories can be set to any value supported by your
+installation.  A typical value is @samp{en_GB.UTF-8} for English in the United
+Kingdom encoded in UTF-8.
+
+The @env{LC_CTYPE} environment variable specifies character
+classification.  GCC uses it to determine the character boundaries in
+a string; this is needed for some multibyte encodings that contain quote
+and escape characters that would otherwise be interpreted as a string
+end or escape.
+
+The @env{LC_MESSAGES} environment variable specifies the language to
+use in diagnostic messages.
+
+If the @env{LC_ALL} environment variable is set, it overrides the value
+of @env{LC_CTYPE} and @env{LC_MESSAGES}; otherwise, @env{LC_CTYPE}
+and @env{LC_MESSAGES} default to the value of the @env{LANG}
+environment variable.  If none of these variables are set, GCC
+defaults to traditional C English behavior.
+
+@item TMPDIR
+@findex TMPDIR
+If @env{TMPDIR} is set, it specifies the directory to use for temporary
+files.  GCC uses temporary files to hold the output of one stage of
+compilation which is to be used as input to the next stage: for example,
+the output of the preprocessor, which is the input to the compiler
+proper.
+
+@item GCC_EXEC_PREFIX
+@findex GCC_EXEC_PREFIX
+If @env{GCC_EXEC_PREFIX} is set, it specifies a prefix to use in the
+names of the subprograms executed by the compiler.  No slash is added
+when this prefix is combined with the name of a subprogram, but you can
+specify a prefix that ends with a slash if you wish.
+
+If @env{GCC_EXEC_PREFIX} is not set, GCC will attempt to figure out
+an appropriate prefix to use based on the pathname it was invoked with.
+
+If GCC cannot find the subprogram using the specified prefix, it
+tries looking in the usual places for the subprogram.
+
+The default value of @env{GCC_EXEC_PREFIX} is
+@file{@var{prefix}/lib/gcc/} where @var{prefix} is the prefix to
+the installed compiler. In many cases @var{prefix} is the value
+of @code{prefix} when you ran the @file{configure} script.
+
+Other prefixes specified with @option{-B} take precedence over this prefix.
+
+This prefix is also used for finding files such as @file{crt0.o} that are
+used for linking.
+
+In addition, the prefix is used in an unusual way in finding the
+directories to search for header files.  For each of the standard
+directories whose name normally begins with @samp{/usr/local/lib/gcc}
+(more precisely, with the value of @env{GCC_INCLUDE_DIR}), GCC tries
+replacing that beginning with the specified prefix to produce an
+alternate directory name.  Thus, with @option{-Bfoo/}, GCC will search
+@file{foo/bar} where it would normally search @file{/usr/local/lib/bar}.
+These alternate directories are searched first; the standard directories
+come next. If a standard directory begins with the configured
+@var{prefix} then the value of @var{prefix} is replaced by
+@env{GCC_EXEC_PREFIX} when looking for header files.
+
+@item COMPILER_PATH
+@findex COMPILER_PATH
+The value of @env{COMPILER_PATH} is a colon-separated list of
+directories, much like @env{PATH}.  GCC tries the directories thus
+specified when searching for subprograms, if it can't find the
+subprograms using @env{GCC_EXEC_PREFIX}.
+
+@item LIBRARY_PATH
+@findex LIBRARY_PATH
+The value of @env{LIBRARY_PATH} is a colon-separated list of
+directories, much like @env{PATH}.  When configured as a native compiler,
+GCC tries the directories thus specified when searching for special
+linker files, if it can't find them using @env{GCC_EXEC_PREFIX}.  Linking
+using GCC also uses these directories when searching for ordinary
+libraries for the @option{-l} option (but directories specified with
+@option{-L} come first).
+
+@item LANG
+@findex LANG
+@cindex locale definition
+This variable is used to pass locale information to the compiler.  One way in
+which this information is used is to determine the character set to be used
+when character literals, string literals and comments are parsed in C and C++.
+When the compiler is configured to allow multibyte characters,
+the following values for @env{LANG} are recognized:
+
+@table @samp
+@item C-JIS
+Recognize JIS characters.
+@item C-SJIS
+Recognize SJIS characters.
+@item C-EUCJP
+Recognize EUCJP characters.
+@end table
+
+If @env{LANG} is not defined, or if it has some other value, then the
+compiler will use mblen and mbtowc as defined by the default locale to
+recognize and translate multibyte characters.
+@end table
+
+@noindent
+Some additional environments variables affect the behavior of the
+preprocessor.
+
+@include cppenv.texi
+
+@c man end
+
+@node Precompiled Headers
+@section Using Precompiled Headers
+@cindex precompiled headers
+@cindex speed of compilation
+
+Often large projects have many header files that are included in every
+source file.  The time the compiler takes to process these header files
+over and over again can account for nearly all of the time required to
+build the project.  To make builds faster, GCC allows users to
+`precompile' a header file; then, if builds can use the precompiled
+header file they will be much faster.
+
+To create a precompiled header file, simply compile it as you would any
+other file, if necessary using the @option{-x} option to make the driver
+treat it as a C or C++ header file.  You will probably want to use a
+tool like @command{make} to keep the precompiled header up-to-date when
+the headers it contains change.
+
+A precompiled header file will be searched for when @code{#include} is
+seen in the compilation.  As it searches for the included file
+(@pxref{Search Path,,Search Path,cpp,The C Preprocessor}) the
+compiler looks for a precompiled header in each directory just before it
+looks for the include file in that directory.  The name searched for is
+the name specified in the @code{#include} with @samp{.gch} appended.  If
+the precompiled header file can't be used, it is ignored.
+
+For instance, if you have @code{#include "all.h"}, and you have
+@file{all.h.gch} in the same directory as @file{all.h}, then the
+precompiled header file will be used if possible, and the original
+header will be used otherwise.
+
+Alternatively, you might decide to put the precompiled header file in a
+directory and use @option{-I} to ensure that directory is searched
+before (or instead of) the directory containing the original header.
+Then, if you want to check that the precompiled header file is always
+used, you can put a file of the same name as the original header in this
+directory containing an @code{#error} command.
+
+This also works with @option{-include}.  So yet another way to use
+precompiled headers, good for projects not designed with precompiled
+header files in mind, is to simply take most of the header files used by
+a project, include them from another header file, precompile that header
+file, and @option{-include} the precompiled header.  If the header files
+have guards against multiple inclusion, they will be skipped because
+they've already been included (in the precompiled header).
+
+If you need to precompile the same header file for different
+languages, targets, or compiler options, you can instead make a
+@emph{directory} named like @file{all.h.gch}, and put each precompiled
+header in the directory, perhaps using @option{-o}.  It doesn't matter
+what you call the files in the directory, every precompiled header in
+the directory will be considered.  The first precompiled header
+encountered in the directory that is valid for this compilation will
+be used; they're searched in no particular order.
+
+There are many other possibilities, limited only by your imagination,
+good sense, and the constraints of your build system.
+
+A precompiled header file can be used only when these conditions apply:
+
+@itemize
+@item
+Only one precompiled header can be used in a particular compilation.
+
+@item
+A precompiled header can't be used once the first C token is seen.  You
+can have preprocessor directives before a precompiled header; you can
+even include a precompiled header from inside another header, so long as
+there are no C tokens before the @code{#include}.
+
+@item
+The precompiled header file must be produced for the same language as
+the current compilation.  You can't use a C precompiled header for a C++
+compilation.
+
+@item
+The precompiled header file must have been produced by the same compiler
+binary as the current compilation is using.
+
+@item
+Any macros defined before the precompiled header is included must
+either be defined in the same way as when the precompiled header was
+generated, or must not affect the precompiled header, which usually
+means that they don't appear in the precompiled header at all.
+
+The @option{-D} option is one way to define a macro before a
+precompiled header is included; using a @code{#define} can also do it.
+There are also some options that define macros implicitly, like
+@option{-O} and @option{-Wdeprecated}; the same rule applies to macros
+defined this way.
+
+@item If debugging information is output when using the precompiled
+header, using @option{-g} or similar, the same kind of debugging information
+must have been output when building the precompiled header.  However,
+a precompiled header built using @option{-g} can be used in a compilation
+when no debugging information is being output.
+
+@item The same @option{-m} options must generally be used when building
+and using the precompiled header.  @xref{Submodel Options},
+for any cases where this rule is relaxed.
+
+@item Each of the following options must be the same when building and using
+the precompiled header:
+
+@gccoptlist{-fexceptions}
+
+@item
+Some other command-line options starting with @option{-f},
+@option{-p}, or @option{-O} must be defined in the same way as when
+the precompiled header was generated.  At present, it's not clear
+which options are safe to change and which are not; the safest choice
+is to use exactly the same options when generating and using the
+precompiled header.  The following are known to be safe:
+
+@gccoptlist{-fmessage-length=  -fpreprocessed  -fsched-interblock @gol
+-fsched-spec  -fsched-spec-load  -fsched-spec-load-dangerous @gol
+-fsched-verbose=<number>  -fschedule-insns  -fvisibility= @gol
+-pedantic-errors}
+
+@end itemize
+
+For all of these except the last, the compiler will automatically
+ignore the precompiled header if the conditions aren't met.  If you
+find an option combination that doesn't work and doesn't cause the
+precompiled header to be ignored, please consider filing a bug report,
+see @ref{Bugs}.
+
+If you do use differing options when generating and using the
+precompiled header, the actual behavior will be a mixture of the
+behavior for the options.  For instance, if you use @option{-g} to
+generate the precompiled header but not when using it, you may or may
+not get debugging information for routines in the precompiled header.
+
+@node Running Protoize
+@section Running Protoize
+
+The program @code{protoize} is an optional part of GCC@.  You can use
+it to add prototypes to a program, thus converting the program to ISO
+C in one respect.  The companion program @code{unprotoize} does the
+reverse: it removes argument types from any prototypes that are found.
+
+When you run these programs, you must specify a set of source files as
+command line arguments.  The conversion programs start out by compiling
+these files to see what functions they define.  The information gathered
+about a file @var{foo} is saved in a file named @file{@var{foo}.X}.
+
+After scanning comes actual conversion.  The specified files are all
+eligible to be converted; any files they include (whether sources or
+just headers) are eligible as well.
+
+But not all the eligible files are converted.  By default,
+@code{protoize} and @code{unprotoize} convert only source and header
+files in the current directory.  You can specify additional directories
+whose files should be converted with the @option{-d @var{directory}}
+option.  You can also specify particular files to exclude with the
+@option{-x @var{file}} option.  A file is converted if it is eligible, its
+directory name matches one of the specified directory names, and its
+name within the directory has not been excluded.
+
+Basic conversion with @code{protoize} consists of rewriting most
+function definitions and function declarations to specify the types of
+the arguments.  The only ones not rewritten are those for varargs
+functions.
+
+@code{protoize} optionally inserts prototype declarations at the
+beginning of the source file, to make them available for any calls that
+precede the function's definition.  Or it can insert prototype
+declarations with block scope in the blocks where undeclared functions
+are called.
+
+Basic conversion with @code{unprotoize} consists of rewriting most
+function declarations to remove any argument types, and rewriting
+function definitions to the old-style pre-ISO form.
+
+Both conversion programs print a warning for any function declaration or
+definition that they can't convert.  You can suppress these warnings
+with @option{-q}.
+
+The output from @code{protoize} or @code{unprotoize} replaces the
+original source file.  The original file is renamed to a name ending
+with @samp{.save} (for DOS, the saved filename ends in @samp{.sav}
+without the original @samp{.c} suffix).  If the @samp{.save} (@samp{.sav}
+for DOS) file already exists, then the source file is simply discarded.
+
+@code{protoize} and @code{unprotoize} both depend on GCC itself to
+scan the program and collect information about the functions it uses.
+So neither of these programs will work until GCC is installed.
+
+Here is a table of the options you can use with @code{protoize} and
+@code{unprotoize}.  Each option works with both programs unless
+otherwise stated.
+
+@table @code
+@item -B @var{directory}
+Look for the file @file{SYSCALLS.c.X} in @var{directory}, instead of the
+usual directory (normally @file{/usr/local/lib}).  This file contains
+prototype information about standard system functions.  This option
+applies only to @code{protoize}.
+
+@item -c @var{compilation-options}
+Use @var{compilation-options} as the options when running @command{gcc} to
+produce the @samp{.X} files.  The special option @option{-aux-info} is
+always passed in addition, to tell @command{gcc} to write a @samp{.X} file.
+
+Note that the compilation options must be given as a single argument to
+@code{protoize} or @code{unprotoize}.  If you want to specify several
+@command{gcc} options, you must quote the entire set of compilation options
+to make them a single word in the shell.
+
+There are certain @command{gcc} arguments that you cannot use, because they
+would produce the wrong kind of output.  These include @option{-g},
+@option{-O}, @option{-c}, @option{-S}, and @option{-o} If you include these in
+the @var{compilation-options}, they are ignored.
+
+@item -C
+Rename files to end in @samp{.C} (@samp{.cc} for DOS-based file
+systems) instead of @samp{.c}.  This is convenient if you are converting
+a C program to C++.  This option applies only to @code{protoize}.
+
+@item -g
+Add explicit global declarations.  This means inserting explicit
+declarations at the beginning of each source file for each function
+that is called in the file and was not declared.  These declarations
+precede the first function definition that contains a call to an
+undeclared function.  This option applies only to @code{protoize}.
+
+@item -i @var{string}
+Indent old-style parameter declarations with the string @var{string}.
+This option applies only to @code{protoize}.
+
+@code{unprotoize} converts prototyped function definitions to old-style
+function definitions, where the arguments are declared between the
+argument list and the initial @samp{@{}.  By default, @code{unprotoize}
+uses five spaces as the indentation.  If you want to indent with just
+one space instead, use @option{-i " "}.
+
+@item -k
+Keep the @samp{.X} files.  Normally, they are deleted after conversion
+is finished.
+
+@item -l
+Add explicit local declarations.  @code{protoize} with @option{-l} inserts
+a prototype declaration for each function in each block which calls the
+function without any declaration.  This option applies only to
+@code{protoize}.
+
+@item -n
+Make no real changes.  This mode just prints information about the conversions
+that would have been done without @option{-n}.
+
+@item -N
+Make no @samp{.save} files.  The original files are simply deleted.
+Use this option with caution.
+
+@item -p @var{program}
+Use the program @var{program} as the compiler.  Normally, the name
+@file{gcc} is used.
+
+@item -q
+Work quietly.  Most warnings are suppressed.
+
+@item -v
+Print the version number, just like @option{-v} for @command{gcc}.
+@end table
+
+If you need special compiler options to compile one of your program's
+source files, then you should generate that file's @samp{.X} file
+specially, by running @command{gcc} on that source file with the
+appropriate options and the option @option{-aux-info}.  Then run
+@code{protoize} on the entire set of files.  @code{protoize} will use
+the existing @samp{.X} file because it is newer than the source file.
+For example:
+
+@smallexample
+gcc -Dfoo=bar file1.c -aux-info file1.X
+protoize *.c
+@end smallexample
+
+@noindent
+You need to include the special files along with the rest in the
+@code{protoize} command, even though their @samp{.X} files already
+exist, because otherwise they won't get converted.
+
+@xref{Protoize Caveats}, for more information on how to use
+@code{protoize} successfully.
diff -Naur gcc-4.4.2.orig/libgcc/config/lm32/t-elf gcc-4.4.2-rtems4.10-20091015/libgcc/config/lm32/t-elf
--- gcc-4.4.2.orig/libgcc/config/lm32/t-elf	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/libgcc/config/lm32/t-elf	2009-10-15 18:36:00.000000000 +0200
@@ -0,0 +1,12 @@
+# Assemble startup files.
+
+$(T)crti.o: $(gcc_srcdir)/config/lm32/crti.S $(GCC_PASSES)
+	$(GCC_FOR_TARGET) $(GCC_CFLAGS) $(MULTILIB_CFLAGS) $(INCLUDES) \
+	-c -o $(T)crti.o -x assembler-with-cpp $(gcc_srcdir)/config/lm32/crti.S
+
+$(T)crtn.o: $(gcc_srcdir)/config/lm32/crtn.S $(GCC_PASSES)
+	$(GCC_FOR_TARGET) $(GCC_CFLAGS) $(MULTILIB_CFLAGS) $(INCLUDES) \
+	-c -o $(T)crtn.o -x assembler-with-cpp $(gcc_srcdir)/config/lm32/crtn.S
+
+CRTSTUFF_T_CFLAGS = -G 0
+TARGET_LIBGCC2_CFLAGS = -G 0
diff -Naur gcc-4.4.2.orig/libgcc/config/lm32/t-uclinux gcc-4.4.2-rtems4.10-20091015/libgcc/config/lm32/t-uclinux
--- gcc-4.4.2.orig/libgcc/config/lm32/t-uclinux	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.4.2-rtems4.10-20091015/libgcc/config/lm32/t-uclinux	2009-10-15 18:36:00.000000000 +0200
@@ -0,0 +1,2 @@
+CRTSTUFF_T_CFLAGS = -fPIC
+TARGET_LIBGCC2_CFLAGS = -fPIC
diff -Naur gcc-4.4.2.orig/libgcc/config.host gcc-4.4.2-rtems4.10-20091015/libgcc/config.host
--- gcc-4.4.2.orig/libgcc/config.host	2009-04-17 13:58:41.000000000 +0200
+++ gcc-4.4.2-rtems4.10-20091015/libgcc/config.host	2009-10-15 18:36:00.000000000 +0200
@@ -95,6 +95,9 @@
 hppa*-*-*)
 	cpu_type=pa
 	;;
+lm32*-*-*)
+	cpu_type=lm32
+	;;
 m32r*-*-*)
         cpu_type=m32r
         ;;
@@ -355,6 +358,14 @@
 	;;
 iq2000*-*-elf*)
         ;;
+lm32-*-elf* | lm32-*-rtems*)
+	extra_parts="crtbegin.o crtend.o crti.o crtn.o"
+	tmake_file="lm32/t-elf"
+	;;
+lm32-*-uclinux*)
+	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtbeginT.o"
+	tmake_file="lm32/t-uclinux"
+	;;	
 m32r-*-elf*|m32r-*-rtems*)
  	;;
 m32rle-*-elf*)