http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54630
--- Comment #9 from Larry Baker <baker at usgs dot gov> 2012-09-25 01:53:01 UTC
---
The build on Linux i386 works fine without --with-host-libstdcxx. I believe
g++ is used for linking.
I tried using a native Linux i386 GCC 4.7.1 to build a cross GCC 4.8.0, with
--with-host-libstdcxx='-static-libgcc -static-libstdc++'. That fails with the
same error I encountered before: undefined references to __cxa_guard_acquire
and __cxa_guard_release in the link step. I am sure this is because gcc was
used and libstdc++ was not searched because I did not include -lstdc++ in
--with-host-libstdcxx.
Lastly, I hacked gcc/Makefile.in to always use g++ for the linker:
# Libraries to use on the host.
HOST_LIBS = @HOST_LIBS@
# The name of the compiler to use.
COMPILER = $(CXX)
COMPILER_FLAGS = $(CXXFLAGS)
# If HOST_LIBS is set, then the user is controlling the libraries to
# link against. In that case, link with $(CC) so that the -lstdc++
# library is not introduced. If HOST_LIBS is not set, link with
# $(CXX) to pick up -lstdc++.
#---> ifeq ($(HOST_LIBS),)
LINKER = $(CXX)
LINKER_FLAGS = $(CXXFLAGS)
#---> else
#---> LINKER = $(CC)
#---> LINKER_FLAGS = $(CFLAGS)
#---> endif
# ( cd cross-gcc-4.8.0-experimental ;
PATH=/usr/local/gcc-4.7.1/bin:${PWD}/../freescale-coldfire-2011.09/bin:${PATH/.:/}
CC_FOR_BUILD=gcc CC=gcc CXX=g++ AR=ar RANLIB=ranlib
AS_FOR_TARGET=m68k-uclinux-as LD_FOR_TARGET=m68k-uclinux-ld
AR_FOR_TARGET=m68k-uclinux-ar RANLIB_FOR_TARGET=m68k-uclinux-ranlib
NM_FOR_TARGET=m68k-uclinux-nm OBJDUMP_FOR_TARGET=m68k-uclinux-objdump
STRIP_FOR_TARGET=m68k-uclinux-strip ${PWD}/../gcc-4.8.0-experimental/configure
--disable-decimal-float --disable-fixed-point --disable-libffi
--disable-libgomp --disable-libmudflap --disable-libquadmath --disable-libssp
--disable-libstdcxx-pch --disable-nls --disable-shared --enable-languages=c,c++
--enable-lto --enable-poison-system-directories --enable-threads
--prefix=/usr/local/gcc-4.8.0 --program-prefix=m68k-uclinux-
--target=m68k-uclinux --with-arch=cf --with-gnu-as --with-gnu-ld
--with-build-time-tools=${PWD}/../freescale-coldfire-2011.09/m68k-uclinux/bin
--with-host-libstdcxx='-static-libgcc -static-libstdc++'
--with-sysroot=${PWD}/../freescale-coldfire-2011.09/m68k-uclinux/libc )
# ( cd cross-gcc-4.8.0-experimental ;
PATH=/usr/local/gcc-4.7.1/bin:${PWD}/../freescale-coldfire-2011.09/bin:${PATH/.:/}
make -j4 )
# ( cd cross-gcc-4.8.0-experimental ;
PATH=/usr/local/gcc-4.7.1/bin:${PWD}/../freescale-coldfire-2011.09/bin:${PATH/.:/}
make install )
This works fine. This is as close as I could get to supplying
LDFLAGS_FOR_BUILD='-static-libgcc -static-libstdc++' to the link step without
causing LINKER=gcc.
