Cross compiling gcc-4.3: wrong library path

["Hector Oron" <hector dot oron at gmail dot com>]

Hello,

I'm trying to cross compile gcc-4.3 for emdebian.org and i have got
some compilers for some arches but i'm struggling with some other
arches (like powerpc, mips(el), sparc and s390).

Those architectures have separated ABIs for (n)32, 64. The problem i
have is that ../lib64 and ../lib32 are not passed to xgcc giving the
following error:

-----------------
/bin/sh ../../../../src/libgcc/../mkinstalldirs 64
mkdir -p -- 64
/home/toolchain/trunk/powerpc/gcc-4.3-4.3.0-5/build/./gcc/xgcc
-B/home/toolchain/trunk/powerpc/gcc-4.3-4.3.0-5/build/./gcc/
-B/usr/powerpc-linux-gnu/bin/ -B/usr/powerpc-linux-gnu/lib/ -isystem
/usr/powerpc-linux-gnu/include -isystem
/usr/powerpc-linux-gnu/sys-include -O2  -O2 -g -g -O2   -DIN_GCC
-DCROSS_DIRECTORY_STRUCTURE   -W -Wall -Wwrite-strings
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition
-isystem ./include  -fPIC -mno-minimal-toc -g -DHAVE_GTHR_DEFAULT
-DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -Dinhibit_libc -shared
-nodefaultlibs -Wl,--soname=libgcc_s.so.1
-Wl,--version-script=libgcc.map -o 64/libgcc_s.so.1.tmp -O2 -g -g -O2
-m64 -fPIC -mstrict-align -B./ _muldi3_s.o _negdi2_s.o _lshrdi3_s.o
_ashldi3_s.o _ashrdi3_s.o _cmpdi2_s.o _ucmpdi2_s.o _clear_cache_s.o
_enable_execute_stack_s.o _trampoline_s.o __main_s.o _absvsi2_s.o
_absvdi2_s.o _addvsi3_s.o _addvdi3_s.o _subvsi3_s.o _subvdi3_s.o
_mulvsi3_s.o _mulvdi3_s.o _negvsi2_s.o _negvdi2_s.o _ctors_s.o
_ffssi2_s.o _ffsdi2_s.o _clz_s.o _clzsi2_s.o _clzdi2_s.o _ctzsi2_s.o
_ctzdi2_s.o _popcount_tab_s.o _popcountsi2_s.o _popcountdi2_s.o
_paritysi2_s.o _paritydi2_s.o _powisf2_s.o _powidf2_s.o _powixf2_s.o
_powitf2_s.o _mulsc3_s.o _muldc3_s.o _mulxc3_s.o _multc3_s.o
_divsc3_s.o _divdc3_s.o _divxc3_s.o _divtc3_s.o _bswapsi2_s.o
_bswapdi2_s.o _fixunssfsi_s.o _fixunsdfsi_s.o _fixunsxfsi_s.o
_fixsfdi_s.o _fixdfdi_s.o _fixxfdi_s.o _fixtfdi_s.o _fixunssfdi_s.o
_fixunsdfdi_s.o _fixunsxfdi_s.o _fixunstfdi_s.o _floatdisf_s.o
_floatdidf_s.o _floatdixf_s.o _floatditf_s.o _floatundisf_s.o
_floatundidf_s.o _floatundixf_s.o _floatunditf_s.o _divdi3_s.o
_moddi3_s.o _udivdi3_s.o _umoddi3_s.o _udiv_w_sdiv_s.o _udivmoddi4_s.o
darwin-ldouble_s.o ppc64-fp_s.o adddf3_s.o addsf3_s.o divdf3_s.o
divsf3_s.o eqdf2_s.o eqsf2_s.o extendsfdf2_s.o fixdfsi_s.o fixsfsi_s.o
floatsidf_s.o floatsisf_s.o floatunsidf_s.o floatunsisf_s.o gedf2_s.o
gesf2_s.o ledf2_s.o lesf2_s.o muldf3_s.o mulsf3_s.o negdf2_s.o
negsf2_s.o subdf3_s.o subsf3_s.o truncdfsf2_s.o unorddf2_s.o
unordsf2_s.o tramp_s.o unwind-dw2_s.o unwind-dw2-fde-glibc_s.o
unwind-sjlj_s.o gthr-gnat_s.o unwind-c_s.o emutls_s.o -lc && rm -f
64/libgcc_s.so && if [ -f 64/libgcc_s.so.1 ]; then mv -f
64/libgcc_s.so.1 64/libgcc_s.so.1.backup; else true; fi && mv
64/libgcc_s.so.1.tmp 64/libgcc_s.so.1 && ln -s libgcc_s.so.1
64/libgcc_s.so
/usr/powerpc-linux-gnu/bin/ld: skipping incompatible
/usr/powerpc-linux-gnu/lib/libc.so when searching for -lc
/usr/powerpc-linux-gnu/bin/ld: skipping incompatible
/usr/powerpc-linux-gnu/lib/libc.a when searching for -lc
/usr/powerpc-linux-gnu/bin/ld: skipping incompatible
/usr/powerpc-linux-gnu/bin/../../lib/libc.so when searching for -lc
/usr/powerpc-linux-gnu/bin/ld: skipping incompatible
/usr/powerpc-linux-gnu/bin/../../lib/libc.a when searching for -lc
/usr/powerpc-linux-gnu/bin/ld: cannot find -lc
---------------------------------------

Note that building 64bit ABI has the libraries under
-B/usr/powerpc-linux-gnu/lib/../lib64/ instead -B/usr/powerpc-linux-gnu/lib/

I have been struggling where to set that up, i found this variable on
configure scripts. Maybe 'genmultilib' script is not doing it's job,
not sure about it. Do you know how could i fix that?

# On Canadian crosses, we'll be searching the right directories for
# the previously-installed cross compiler, so don't bother to add
# flags for directories within the install tree of the compiler
# being built; programs in there won't even run.
if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
  # Search for pre-installed headers if nothing else fits.
  FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/
-B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem
$(build_tooldir)/sys-include'
fi

Find full error logs at:
http://www.emdebian.org/~zumbi/toolchain/unstable-toolchain-amd64/logs//amd64-powerpc-4.3.log
http://www.emdebian.org/~zumbi/toolchain/unstable-toolchain-amd64/logs//amd64-mips-4.3.log
http://www.emdebian.org/~zumbi/toolchain/unstable-toolchain-amd64/logs//amd64-mipsel-4.3.log
http://www.emdebian.org/~zumbi/toolchain/unstable-toolchain-amd64/logs//amd64-sparc-4.3.log
http://www.emdebian.org/~zumbi/toolchain/unstable-toolchain-amd64/logs//amd64-s390-4.3.log

Regards
-- 
 Héctor Orón

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