From 309a9dc8dba6e248091b45297ef2d95fd9fd1be8 Mon Sep 17 00:00:00 2001
From: Ralf Corsepius <ralf.corsepius@rtems.org>
Date: Fri, 28 Feb 2003 06:50:36 +0000
Subject: Merger from rtems-4-6-branch.

---
 cpukit/aclocal/env-rtemsbsp.m4 |  3 ---
 cpukit/aclocal/env-rtemscpu.m4 |  3 ---
 cpukit/aclocal/gcc-isystem.m4  | 25 +++++++++++++++++++++++++
 cpukit/aclocal/gcc-specs.m4    | 20 --------------------
 cpukit/aclocal/prog-cc.m4      | 11 +++++++++--
 5 files changed, 34 insertions(+), 28 deletions(-)
 create mode 100644 cpukit/aclocal/gcc-isystem.m4
 delete mode 100644 cpukit/aclocal/gcc-specs.m4

diff --git a/cpukit/aclocal/env-rtemsbsp.m4 b/cpukit/aclocal/env-rtemsbsp.m4
index f453586cdc..ae1a6f72d3 100644
--- a/cpukit/aclocal/env-rtemsbsp.m4
+++ b/cpukit/aclocal/env-rtemsbsp.m4
@@ -34,9 +34,6 @@ AC_SUBST(project_libdir)
 RTEMS_ROOT="$PROJECT_ROOT/c/$RTEMS_BSP"
 AC_SUBST(RTEMS_ROOT)
 
-GCC_SPECS="-isystem \$(PROJECT_INCLUDE)"
-AC_SUBST(GCC_SPECS)
-
 RTEMS_ENABLE_BARE
 AC_SUBST(BARE_CPU_MODEL)
 AC_SUBST(BARE_CPU_CFLAGS)
diff --git a/cpukit/aclocal/env-rtemscpu.m4 b/cpukit/aclocal/env-rtemscpu.m4
index b33fdbdd3c..0ea77438b6 100644
--- a/cpukit/aclocal/env-rtemscpu.m4
+++ b/cpukit/aclocal/env-rtemscpu.m4
@@ -13,9 +13,6 @@ if test x"$multilib" = x"yes"; then
     [MULTISUBDIR="/$with_multisubdir"])
   AC_SUBST(MULTISUBDIR)
 
-  GCC_SPECS="-isystem \$(PROJECT_INCLUDE)"
-  AC_SUBST(GCC_SPECS)
-
   PROJECT_INCLUDE="\$(PROJECT_ROOT)/lib/include"
   AC_SUBST(PROJECT_INCLUDE)
 
diff --git a/cpukit/aclocal/gcc-isystem.m4 b/cpukit/aclocal/gcc-isystem.m4
new file mode 100644
index 0000000000..c230508208
--- /dev/null
+++ b/cpukit/aclocal/gcc-isystem.m4
@@ -0,0 +1,25 @@
+dnl
+dnl $Id$
+dnl
+dnl Check whether the gcc accepts -isystem
+dnl
+
+AC_DEFUN(RTEMS_GCC_ISYSTEM,
+[AC_REQUIRE([RTEMS_PROG_CC])
+AC_CACHE_CHECK(whether $CC accepts -isystem,rtems_cv_gcc_isystem,
+[
+rtems_cv_gcc_isystem=no
+if test x"$GCC" = x"yes"; then
+cat << EOF > conftest.h
+int conftest123();
+EOF
+cat << EOF > conftest.c
+#include <conftest.h>
+int conftest123() {}
+EOF
+  if test -z "`${CC} -isystem./ -c conftest.c 2>&1`";then
+    rtems_cv_gcc_isystem=yes
+  fi
+fi
+rm -f conftest*
+])])
diff --git a/cpukit/aclocal/gcc-specs.m4 b/cpukit/aclocal/gcc-specs.m4
deleted file mode 100644
index ca0271424f..0000000000
--- a/cpukit/aclocal/gcc-specs.m4
+++ /dev/null
@@ -1,20 +0,0 @@
-dnl
-dnl $Id$
-dnl
-dnl Check whether the target compiler accepts -specs
-dnl
-
-AC_DEFUN(RTEMS_GCC_SPECS,
-[AC_REQUIRE([RTEMS_PROG_CC])
-AC_CACHE_CHECK(whether $CC accepts -specs,rtems_cv_gcc_specs,
-[
-rtems_cv_gcc_specs=no
-if test x"$GCC" = x"yes"; then
-  touch confspec
-  echo 'void f(){}' >conftest.c
-  if test -z "`${CC} -specs confspec -c conftest.c 2>&1`";then
-    rtems_cv_gcc_specs=yes
-  fi
-fi
-rm -f confspec conftest*
-])])
diff --git a/cpukit/aclocal/prog-cc.m4 b/cpukit/aclocal/prog-cc.m4
index 4ed2f5730c..117229bbe4 100644
--- a/cpukit/aclocal/prog-cc.m4
+++ b/cpukit/aclocal/prog-cc.m4
@@ -26,8 +26,8 @@ AC_DEFUN(RTEMS_PROG_CC_FOR_TARGET,
 [
 dnl check target cc
 RTEMS_PROG_CC
-dnl check if the compiler supports --specs
-RTEMS_GCC_SPECS
+dnl check if the compiler supports -isystem
+RTEMS_GCC_ISYSTEM
 dnl check if the target compiler may use --pipe
 RTEMS_GCC_PIPE
 test "$rtems_cv_gcc_pipe" = "yes" && CC="$CC --pipe"
@@ -36,4 +36,11 @@ if test "$GCC" = yes; then
 RTEMS_CFLAGS="$RTEMS_CFLAGS -Wall"
 m4_if([$1],,[],[RTEMS_CFLAGS="$RTEMS_CFLAGS $1"])
 fi
+
+AS_IF([test x"$rtems_cv_gcc_isystem" = x"yes"],[
+  RTEMS_CPPFLAGS="-isystem \$(PROJECT_INCLUDE)"],[
+  RTEMS_CPPFLAGS="-I\$(PROJECT_INCLUDE)"
+])
+AC_SUBST(RTEMS_CPPFLAGS)
+
 ])
-- 
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