Monstrous patch from Ralf Corsepius <corsepiu@faw.uni-ulm.de>. I have

made no attempt to divide the comments up and place them with just
the appropriate files.  Here is an excerpt from Ralf's email:

Changes including comments on changes I made after cycling through
all the targets:

  * Added ranlib support. Now all targets use "ranlib" instead of "ar -s"
    to build an index for a library. If ranlib isn't detected during
    configuration, check if ar -s is working and try "ar -s" instead of

  * Removed $(XXX_FOR_TARGET) from make/target.cfg.in, use $(XXX) instead now.

  * gcc-target-default.cfg: LINK_XXXX-defines reworked to solve the -l
    problem under posix (cf gcc-target-default.cfg)

  * rtems-glom replaced by Makefile-rules inside of the wrapup/Makefile.in
    that has been using rtems-glom until now.

  * Removed CCC and friends in gcc-target-default.cfg, as they have been
    breaking CXX support.

  * Removed CONFIG.$(TARGET_ARCH).CC lines from several custom/*.cfg
    files, because this is now set in custom/default.cfg.

  * Added aclocal/ar-s.m4, check whether "ar -s" is working

  * Added aclocal/cygwin.m4 and aclocal/exeext.m4.

  * Reworked aclocal/canonicalize-tools.m4: Added ar -s check; fixes for
    problems when  XXX_FOR_TARGET is given via environment variables (didn't
    work for gcc until now), adding cygwin check, improved autoconf-cache
    handling.

  * Removed -l from make rule dependencies. LINK_LIBS is now allowed to
    contain -L and -l. LINK_OBJS and LINK_FILES must not contain -L or -l.
    gcc28 make-exe rules now link using $(LINK_OBJS) $(LINK_LIBS) => Almost
    all custom/*.cfg are modified. This is very likely to break something
    because of typos or having missed to edit a file.

  Open problems, known bugs, things I didn't do:

  * custom/p4000.cfg seems to be out of date and requires to be reviewed.

    (JRS NOTE: It is subordinate p4650 and p4600 -- both of which build ok
               after minor changes.)

  * custom/psim.cfg needs to be reviewed, I added some changes to it, I am
    insecure about.

    (JRS NOTE: psim had a minor problem endif/endef swapped but runs fine.)

  * rtems-glom.in can now be removed.

  * gcc*.cfg files "make depend" rules don't honor language specific flags
    (e.g CXXFLAGS is ignored for *.cc) - Nothing to worry about now, but may
    cause problems for hosts/targets not using gcc or rtems-add-ons that use
    external packages.

  * AFAIS, the no_bsp BSP can't be build anymore, i.e. configure refused
    to configure for it whatever I tried.

  * The toplevel and toplevel+1 README files are quite out-dated

  * cygwin.m4 isn't of much use for rtems. In most cases (cf.
    aclocal/*.m4) it is worked around by directly using $host_os. I think
    I'll remove it soon after the next snapshot

  * Before release the cygwin patch needs to be tested under cygwin. I may
    have broken/missed something (esp. the sed-pattern to convert \\ into /
    may be broken).

  * You should try to build/run the posix-BSP under solaris - I don't
    expect problems, but I am not 100% sure, esp. with regard to ranlib/ar -s.

  * You should consider to convert all make/compilers/*.cfg files into
    make/compilers/*.cfg.in files and let autoconf generate the *.cfg. This
    may help getting rid of some if/then/else statements and help
    hard-coding some defines into those files in future and shouldn't
    disturb now.

  * Not having installed libc.a/libm.a on a host may still break building
    rtems, esp. when using -disable-gcc28 as the gcc27-configuration scheme
    directly accesses libc.a and libm.a. The problem should not appear when
    using gcc28 because it references libc/libm only through -lc and -lm
    which may be static or dynamic (I didn't test this).

  * shgen is not yet included (I didn't yet have enough time to integrate it).

  * I know about a few more configure-probs (esp. cross-checking
    --enable-* flags).
     + warn/refuse to configure when --enable-libcdir and
       --enable-gcc28 are given.
     + force --enable-libcdir when --disable-gcc28 is given

  * Replaced KSHELL with @KSH@ in some shell scripts generated by configure.in.

  * Added a dependency to aclocal/*.m4 in the toplevel Makefile => configure
    and aclocal.m4 will now be rebuild when any aclocal/*.m4 file is changed

  * Some changes to aclocal/gcc-pipe.m4 and aclocal/gcc-specs.m4

  * Replaced i[[3456]]86-unknown-freebsd2.[[12]] with i[[3456]]86-*freebsd2.*
    in configure.in, as I suppose there might exist a variety of valid vendors
    (2nd field of the name-tripple)

  * Disabled override MAKEFLAGS in toplevel Makefile.in - Potential
    side-effects are not really clear to me.

  * In mvme162.cfg, $(LINK_LIBS) is missing in the CC line in gcc28's make-exe
    rule (yet another one I missed to edit). Just append $(LINK_LIBS) to
    the "CC" line, like I hopefully did to ALL other custom/*.cfg files.

  * the problem with mvme162lx.cfg is a follow-up problem of the
    mvme162.cfg-bug.

  * mvme162/console and idp/console had variables named Buffer which
    conflicted with similarly named variables in some tests.

1 files changed, 41 insertions, 29 deletions

diff --git a/make/compilers/gcc-target-default.cfg b/make/compilers/gcc-target-default.cfg
index d75c1e4230..82294d0e87 100644
--- a/make/compilers/gcc-target-default.cfg
+++ b/make/compilers/gcc-target-default.cfg
@@ -4,10 +4,6 @@
 #  $Id$
 # 
 
-# names for C++ compilers.
-CXX=$(CC) 
-CCC=$(CXX)
-
 CPPFLAGS=$(CFLAGS) $(XCPPFLAGS)
 
 CPLUS_CPPFLAGS=$(CFLAGS) $(XCPPFLAGS)
@@ -45,7 +41,7 @@ ASMFLAGS=$(CPU_DEFINES) $(CPU_CFLAGS) -g \
 else
 # Used for embedded bsps
 # Ask gcc where it finds its own include files
-GCC_INCLUDE=$(shell $(CC) $(CPU_CFLAGS) -print-file-name=include)
+GCC_INCLUDE=$(shell $(CC) $(CPU_CFLAGS) -print-file-name=include $(GCCSED))
 
 CFLAGS_DEFAULT = $(CPU_DEFINES) $(CPU_CFLAGS) -Wall -ansi -fasm -g \
   -nostdinc -I$(PROJECT_INCLUDE) \
@@ -76,11 +72,11 @@ ASMFLAGS=$(CPU_DEFINES) $(CPU_CFLAGS) -g -I$(srcdir) \
 
 # default location of Standard C Library
 ifndef LIBC_LIBC
-LIBC_LIBC=$(shell $(CC) $(CPU_CFLAGS) -print-file-name=libc.a)
+LIBC_LIBC=$(shell $(CC) $(CPU_CFLAGS) -print-file-name=libc.a $(GCCSED))
 endif
 
 ifndef LIBC_LIBM
-LIBC_LIBM=$(shell $(CC) $(CPU_CFLAGS) -print-file-name=libm.a)
+LIBC_LIBM=$(shell $(CC) $(CPU_CFLAGS) -print-file-name=libm.a $(GCCSED))
 endif
 endif
 
@@ -93,7 +89,7 @@ else
 HAS_CPLUSPLUS=no
 endif
 
-# debug flag; typically 
+# debug flag;
 CFLAGS_DEBUG_V+=-Wno-unused
 
 ifeq ($(RTEMS_USE_GCC272),no)
@@ -173,10 +169,9 @@ ARFLAGS=ruv
 
 #
 # Command to convert a normal archive to one searchable by $(LD)
-# Not needed on SVR4
 #
-
-MKLIB=echo library is complete:
+# NOTE: Obsolete, use $(RANLIB) instead, MKLIB may disappear soon 
+MKLIB=$(RANLIB)
 
 #
 # How to compile stuff into ${ARCH} subdirectory
@@ -193,12 +188,6 @@ ${ARCH}/%.o: %.c
 ${ARCH}/%.o: %.cc
 	${COMPILE.cc} -o $@ $<
 
-${ARCH}/%.o: %.cpp
-	${COMPILE.cc} -o $@ $<
-
-${ARCH}/%.o: %.cxx
-	${COMPILE.cc} -o $@ $<
-
 ${ARCH}/%.o: %.S
 	${COMPILE.c} -DASM -o $@ $<
 
@@ -272,26 +261,49 @@ CONSTRUCTOR=
 LIBC_LOW=
 
 ifndef LIBGCC
-LIBGCC = $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
+LIBGCC = $(shell $(CC) $(CFLAGS) -print-libgcc-file-name $(GCCSED))
 endif
 
-LINK_OBJS=\
+#
+# NOTE: a rule to link an rtems' application should look similar to this
+#       (cf. "make-exe" in make/custom/*.cfg): 
+#
+# gcc27:
+# $(PGM): $(LINK_FILES)
+#	$(LD) $(LDFLAGS) -o $@ $(LINK_OBJS) \
+#	--start-group $(LIB_LIBS) --end-group
+#
+# gcc28:
+# $(PGM): $(LINK_FILES)
+#	$(CC) $(CFLAGS) -o $@ $(LINK_OBJS) $(LIB_LIBS)
+#
+
+LINK_OBJS =\
     $(CONSTRUCTOR) \
     $(OBJS) \
     $(MANAGERS_NOT_WANTED:%=$(PROJECT_RELEASE)/lib/no-%$(LIB_VARIANT).rel) \
-    $(LD_LIBS) \
     $(PROJECT_RELEASE)/lib/libtest$(LIBSUFFIX_VA)
 
-LINK_LIBS=\
-    $(LD_LIBS) \
-    $(LIBC_EXTRA_LIBS)  \
-    $(PROJECT_RELEASE)/lib/librtemsall$(LIBSUFFIX_VA) \
-    $(LIBC_LIBM) $(LIBC_LIBC) $(LIBGCC)
-
-LINK_FILES=\
+LINK_FILES =\
     $(START_FILE) \
-    $(LINK_OBJS) \
-    $(LINK_LIBS)
+    $(CONSTRUCTOR) \
+    $(OBJS) \
+    $(MANAGERS_NOT_WANTED:%=$(PROJECT_RELEASE)/lib/no-%$(LIB_VARIANT).rel) \
+    $(PROJECT_RELEASE)/lib/libtest$(LIBSUFFIX_VA) \
+    $(PROJECT_RELEASE)/lib/librtemsall$(LIBSUFFIX_VA)
+
+ifeq ($(RTEMS_USE_GCC272),yes)
+LINK_LIBS = $(PROJECT_RELEASE)/lib/librtemsall$(LIBSUFFIX_VA)
+ifeq ($(RTEMS_CROSS_TARGET),yes)
+# NOTE: add libc and libgcc only for embedded targets
+#       LIBC_LIBM should not be needed by rtems itself.
+# FIXME: If a BSP requires libm, its make/custom/*.cfg file should add
+#        LIBC_LIBM to LINK_LIBS (untested)
+LINK_LIBS += $(LIBC_LIBC) $(LIBGCC)
+endif
+endif
+
+LINK_LIBS += $(LD_LIBS)    
 
 #
 # Allow user to override link commands (to build a prom image, perhaps)