Re: CFT: Move unwinder to toplevel libgcc

[Rainer Orth <ro at CeBiTec dot Uni-Bielefeld dot DE>]

Steve,

> I tried this (here is the libgcc/config.host entry for ia64*-*-linux*):
>
> ia64*-*-linux*)
>         extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtfastmath.o"
>         tmake_file="ia64/t-ia64 t-softfp ia64/t-fprules-softfp ia64/t-softfp-compat ia64/t-glibc ia64/t-eh-ia64 t-libunwind"
>         if test x$with_system_libunwind != xyes ; then
>                 tmake_file="${tmake_file} t-slibgcc t-libunwind-elf ia64/t-glibc-libunwind"
>         fi
>         md_unwind_header=ia64/linux-unwind.h
>         ;;
>
>
> The build still failed, but it failed in a different way.  I got:
>
> /wsp/sje/gcc_git/build-ia64-debian-linux-gnu-gcc/obj_gcc/./gcc/xgcc -B/wsp/sje/gcc_git/build-ia64-debian-linux-gnu-gcc/obj_gcc/./gcc/ -B/wsp/sje/gcc_git/gcc-ia64-debian-linux-gnu-gcc/ia64-debian-linux-gnu/bin/ -B/wsp/sje/gcc_git/gcc-ia64-debian-linux-gnu-gcc/ia64-debian-linux-gnu/lib/ -isystem /wsp/sje/gcc_git/gcc-ia64-debian-linux-gnu-gcc/ia64-debian-linux-gnu/include -isystem /wsp/sje/gcc_git/gcc-ia64-debian-linux-gnu-gcc/ia64-debian-linux-gnu/sys-include    -O2  -g -O2 -DIN_GCC   -DUSE_LIBUNWIND_EXCEPTIONS -W -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem ./include  -fPIC -DUSE_GAS_SYMVER -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector  -shared -nodefaultlibs  -o ./libgcc_s.so.1.tmp -g -O2 -B./ __divdf3_s.o __divsf3_s.o __divdi3_s.o __moddi3_s.o __udivdi3_s.o __umoddi3_s.o __divsi3_s.o __modsi3_s.o __udivsi3_s.o __umodsi3_s.o __save_stack_nonlocal_s.o __nonlocal_goto_s.o __restore_stack_nonlocal_s.o __trampoline_s.o _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 _fixunssfdi_s.o _fixunsdfdi_s.o _fixunsxfdi_s.o _floatdisf_s.o _floatdidf_s.o _floatdixf_s.o
>  _floatundisf_s.o _floatundidf_s.o _floatundixf_s.o _divdi3_s.o _moddi3_s.o _udivdi3_s.o _umoddi3_s.o _udiv_w_sdiv_s.o _udivmoddi4_s.o addtf3_s.o divtf3_s.o eqtf2_s.o getf2_s.o letf2_s.o multf3_s.o negtf2_s.o subtf3_s.o unordtf2_s.o fixtfsi_s.o fixunstfsi_s.o floatsitf_s.o floatunsitf_s.o fixtfdi_s.o fixunstfdi_s.o floatditf_s.o floatunditf_s.o fixtfti_s.o fixunstfti_s.o floattitf_s.o floatuntitf_s.o extendsftf2_s.o extenddftf2_s.o extendxftf2_s.o trunctfsf2_s.o trunctfdf2_s.o trunctfxf2_s.o tf-signs_s.o __divxf3_s.o _fixtfdi_s.o _fixunstfdi_s.o _floatditf_s.o enable-execute-stack_s.o unwind-sjlj_s.o unwind-c_s.o unwind-compat_s.o unwind-dw2-fde-compat_s.o emutls_s.o -lc && rm -f ./libgcc_s.so && if [ -f ./libgcc_s.so.1 ]; then mv -f ./libgcc_s.so.1 ./libgcc_s.so.1.backup; else true; fi && mv ./libgcc_s.so.1.tmp ./libgcc_s.so.1 && ln -s libgcc_s.so.1 ./libgcc_s.so
> /wsp/sje/gcc_git/gcc-ia64-debian-linux-gnu-gcc/ia64-debian-linux-gnu/bin/ld: ./libgcc_s.so.1.tmp: version node not found for symbol _Unwind_Backtrace@GCC_3.3
> /wsp/sje/gcc_git/gcc-ia64-debian-linux-gnu-gcc/ia64-debian-linux-gnu/bin/ld: failed to set dynamic section sizes: Bad value
> collect2: error: ld returned 1 exit status
> make[3]: *** [libgcc_s.so] Error 1

unfortunately, I don't even have an idea what this error is supposed to
mean.  Seems to be an error ultimately due to bfd/elfxx-ia64.c
(elfNN_ia64_size_dynamic_sections) failing.

To debug this, I'd start by comparing the link lines for a vanilla build
with my patch, then, if no differences are apparent, check the object
files.

Sorry this is such a mess.

	Rainer

-- 
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Rainer Orth, Center for Biotechnology, Bielefeld University