Bug#783527: fails to build cross compiler for mips64el, ppc64, s390x, sparc64
Source: gcc-4.9
Version: 4.9.2-10
Tags: patch
User: helmutg@debian.org
Usertags: rebootstrap
Example failing log (of a stage2 build):
| /tmp/buildd/gcc_2/gcc-4.9-4.9.2/build/./gcc/xgcc -B/tmp/buildd/gcc_2/gcc-4.9-4.9.2/build/./gcc/ -B/usr/powerpc64-linux-gnu/bin/ -B/usr/powerpc64-linux-gnu/lib/ -isystem /usr/powerpc64-linux-gnu/include -isystem /usr/powerpc64-linux-gnu/sys-include -isystem /tmp/buildd/gcc_2/gcc-4.9-4.9.2/build/sys-include -O2 -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -fPIC -mlong-double-128 -mno-minimal-toc -g -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector -Dinhibit_libc -shared -nodefaultlibs -Wl,--soname=libgcc_s.so.1 -Wl,--version-script=libgcc.map -o 32/libgcc_s.so.1.tmp -g -O2 -m32 -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 _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 _clrsbsi2_s.o _clrsbdi2_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 ibm-ldouble_s.o tramp_s.o ppc64-fp_s.o addsf3_s.o divsf3_s.o eqsf2_s.o gesf2_s.o lesf2_s.o mulsf3_s.o negsf2_s.o subsf3_s.o unordsf2_s.o fixsfsi_s.o floatsisf_s.o floatunsisf_s.o adddf3_s.o divdf3_s.o eqdf2_s.o gedf2_s.o ledf2_s.o muldf3_s.o negdf2_s.o subdf3_s.o unorddf2_s.o fixdfsi_s.o floatsidf_s.o floatunsidf_s.o extendsfdf2_s.o truncdfsf2_s.o enable-execute-stack_s.o unwind-dw2_s.o unwind-dw2-fde-dip_s.o unwind-sjlj_s.o unwind-c_s.o emutls_s.o libgcc.a -lc && rm -f 32/libgcc_s.so && if [ -f 32/libgcc_s.so.1 ]; then mv -f 32/libgcc_s.so.1 32/libgcc_s.so.1.backup; else true; fi && mv 32/libgcc_s.so.1.tmp 32/libgcc_s.so.1 && (echo "/* GNU ld script"; echo " Use the shared library, but some functions are only in"; echo " the static library. */"; echo "GROUP ( libgcc_s.so.1 -lgcc )" ) > 32/libgcc_s.so
| /usr/powerpc64-linux-gnu/bin/ld: skipping incompatible /usr/powerpc64-linux-gnu/lib/libc.so when searching for -lc
| /usr/powerpc64-linux-gnu/bin/ld: cannot find -lc
| collect2: error: ld returned 1 exit status
| Makefile:937: recipe for target 'libgcc_s.so' failed
| make[6]: *** [libgcc_s.so] Error 1
| make[6]: Leaving directory '/tmp/buildd/gcc_2/gcc-4.9-4.9.2/build/powerpc64-linux-gnu/32/libgcc'
| Makefile:1136: recipe for target 'multi-do' failed
| make[5]: *** [multi-do] Error 1
| make[5]: Leaving directory '/tmp/buildd/gcc_2/gcc-4.9-4.9.2/build/powerpc64-linux-gnu/libgcc'
| Makefile:114: recipe for target 'all-multi' failed
| make[4]: *** [all-multi] Error 2
| make[4]: Leaving directory '/tmp/buildd/gcc_2/gcc-4.9-4.9.2/build/powerpc64-linux-gnu/libgcc'
| Makefile:9852: recipe for target 'all-target-libgcc' failed
| make[3]: *** [all-target-libgcc] Error 2
| make[3]: Leaving directory '/tmp/buildd/gcc_2/gcc-4.9-4.9.2/build'
| Makefile:840: recipe for target 'all' failed
| make[2]: *** [all] Error 2
| make[2]: Leaving directory '/tmp/buildd/gcc_2/gcc-4.9-4.9.2/build'
| s=`cat status`; rm -f status; test $s -eq 0
| debian/rules2:1100: recipe for target 'stamps/05-build-stamp' failed
| make[1]: *** [stamps/05-build-stamp] Error 1
| make[1]: Leaving directory '/tmp/buildd/gcc_2/gcc-4.9-4.9.2'
| debian/rules:50: recipe for target 'stamps/05-build-stamp' failed
| make: *** [stamps/05-build-stamp] Error 2
| dpkg-buildpackage: error: dpkg-architecture -f -Appc64 -c ./debian/rules build gave error exit status 2
In this example, you can see that the multilib 32 pass fails linking.
Surprisingly though, -B/usr/powerpc64-linux-gnu/lib is passed instead of
the expected -B/usr/powerpc64-linux-gnu/lib32.
The fix is already implemented and resides in cross-biarch.diff. There
$(FLAGS_TO_PASS) is replaced with:
$(subst -B$(build_tooldir)/lib/,-B$(build_tooldir)/lib$${libsuffix_}/,$(FLAGS_TO_PASS))
which does exactly the necessary transformation. cross-biarch.diff is
not enabled for any of mips64el, ppc64, s390x or ppc64 however. It is
only enabled when $(biarch64) is set to yes, but 64bit architectures do
not have a 64bit multilib. So the patch should really be enabled for any
kind of biarch.
This bug also affects gcc-5.
Helmut
diff -u gcc-4.9-*/debian/rules.patch gcc-4.9-*/debian/rules.patch
--- gcc-4.9-*/debian/rules.patch
+++ gcc-4.9-*/debian/rules.patch
@@ -289,7 +289,7 @@
ifeq ($(DEB_CROSS),yes)
debian_patches += cross-no-locale-include
endif
-ifeq ($(biarch64),yes)
+ifneq ($(filter yes,$(biarch32) $(biarch64) $(biarchhf) $(biarchn32) $(biarchsf) $(biarchx32)),)
ifeq ($(DEB_CROSS),yes)
debian_patches += cross-biarch
endif
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