How to reproduce: crossdev -t ia64-unknown-linux-gnu cross-glibc fails on linking stage (tried 2.12-2.14 versions): /usr/lib/gcc/ia64-unknown-linux-gnu/4.5.3/libgcc.a(unwind-compat.o): In function `_Unwind_Backtrace@GCC_3.3': (.text+0x22): undefined reference to `__libunwind_Unwind_Backtrace' /usr/lib/gcc/ia64-unknown-linux-gnu/4.5.3/libgcc.a(unwind-compat.o): In function `_Unwind_DeleteException@GCC_3.0': (.text+0xa2): undefined reference to `__libunwind_Unwind_DeleteException' /usr/lib/gcc/ia64-unknown-linux-gnu/4.5.3/libgcc.a(unwind-compat.o): In function `_Unwind_FindEnclosingFunction@GCC_3.3': (.text+0x122): undefined reference to `__libunwind_Unwind_FindEnclosingFunction' /usr/lib/gcc/ia64-unknown-linux-gnu/4.5.3/libgcc.a(unwind-compat.o): In function `_Unwind_ForcedUnwind@GCC_3.0': (.text+0x1a2): undefined reference to `__libunwind_Unwind_ForcedUnwind' /usr/lib/gcc/ia64-unknown-linux-gnu/4.5.3/libgcc.a(unwind-compat.o): In function `_Unwind_GetCFA@GCC_3.3': (.text+0x222): undefined reference to `__libunwind_Unwind_GetCFA' /usr/lib/gcc/ia64-unknown-linux-gnu/4.5.3/libgcc.a(unwind-compat.o): In function `_Unwind_GetBSP@GCC_3.3.2': (.text+0x2a2): undefined reference to `__libunwind_Unwind_GetBSP' /usr/lib/gcc/ia64-unknown-linux-gnu/4.5.3/libgcc.a(unwind-compat.o): In function `_Unwind_GetGR@GCC_3.0': (.text+0x322): undefined reference to `__libunwind_Unwind_GetGR' /usr/lib/gcc/ia64-unknown-linux-gnu/4.5.3/libgcc.a(unwind-compat.o): In function `_Unwind_GetIP@GCC_3.0': (.text+0x3a2): undefined reference to `__libunwind_Unwind_GetIP' /usr/lib/gcc/ia64-unknown-linux-gnu/4.5.3/libgcc.a(unwind-compat.o): In function `_Unwind_GetIPInfo': (.text+0x422): undefined reference to `__libunwind_Unwind_GetIP' /usr/lib/gcc/ia64-unknown-linux-gnu/4.5.3/libgcc.a(unwind-compat.o): In function `_Unwind_GetLanguageSpecificData@GCC_3.0': (.text+0x4a2): undefined reference to `__libunwind_Unwind_GetLanguageSpecificData' /usr/lib/gcc/ia64-unknown-linux-gnu/4.5.3/libgcc.a(unwind-compat.o): In function `_Unwind_GetRegionStart@GCC_3.0': (.text+0x522): undefined reference to `__libunwind_Unwind_GetRegionStart' /usr/lib/gcc/ia64-unknown-linux-gnu/4.5.3/libgcc.a(unwind-compat.o): In function `_Unwind_RaiseException@GCC_3.0': (.text+0x5a2): undefined reference to `__libunwind_Unwind_RaiseException' /usr/lib/gcc/ia64-unknown-linux-gnu/4.5.3/libgcc.a(unwind-compat.o): In function `_Unwind_Resume@GCC_3.0': (.text+0x622): undefined reference to `__libunwind_Unwind_Resume' /usr/lib/gcc/ia64-unknown-linux-gnu/4.5.3/libgcc.a(unwind-compat.o): In function `_Unwind_Resume_or_Rethrow@GCC_3.3': (.text+0x6a2): undefined reference to `__libunwind_Unwind_Resume_or_Rethrow' /usr/lib/gcc/ia64-unknown-linux-gnu/4.5.3/libgcc.a(unwind-compat.o): In function `_Unwind_SetGR@GCC_3.0': (.text+0x722): undefined reference to `__libunwind_Unwind_SetGR' /usr/lib/gcc/ia64-unknown-linux-gnu/4.5.3/libgcc.a(unwind-compat.o): In function `_Unwind_SetIP@GCC_3.0': (.text+0x7a2): undefined reference to `__libunwind_Unwind_SetIP' collect2: ld returned 1 exit status make[2]: *** [/var/tmp/portage/cross-ia64-unknown-linux-gnu/glibc-2.14.1-r2/work/build-default-ia64-unknown-linux-gnu-nptl/elf/sln] Error 1 Output of readelf -Ws unwind-compat.o from /usr/lib/gcc/ia64-unknown-linux-gnu/4.5.3/libgcc.a: Symbol table '.symtab' contains 54 entries: Num: Value Size Type Bind Vis Ndx Name 0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND 1: 0000000000000000 0 SECTION LOCAL DEFAULT 1 2: 0000000000000000 0 SECTION LOCAL DEFAULT 5 3: 0000000000000000 0 SECTION LOCAL DEFAULT 3 4: 0000000000000000 0 SECTION LOCAL DEFAULT 4 5: 0000000000000000 0 SECTION LOCAL DEFAULT 6 6: 0000000000000000 0 SECTION LOCAL DEFAULT 8 7: 0000000000000000 0 SECTION LOCAL DEFAULT 9 8: 0000000000000000 80 FUNC GLOBAL DEFAULT 1 _Unwind_Backtrace 9: 0000000000000080 80 FUNC GLOBAL DEFAULT 1 _Unwind_DeleteException 10: 0000000000000100 80 FUNC GLOBAL DEFAULT 1 _Unwind_FindEnclosingFunction 11: 0000000000000180 80 FUNC GLOBAL DEFAULT 1 _Unwind_ForcedUnwind 12: 0000000000000200 80 FUNC GLOBAL DEFAULT 1 _Unwind_GetCFA 13: 0000000000000280 80 FUNC GLOBAL DEFAULT 1 _Unwind_GetBSP 14: 0000000000000300 80 FUNC GLOBAL DEFAULT 1 _Unwind_GetGR 15: 0000000000000380 80 FUNC GLOBAL DEFAULT 1 _Unwind_GetIP 16: 0000000000000480 80 FUNC GLOBAL DEFAULT 1 _Unwind_GetLanguageSpecificData 17: 0000000000000500 80 FUNC GLOBAL DEFAULT 1 _Unwind_GetRegionStart 18: 0000000000000580 80 FUNC GLOBAL DEFAULT 1 _Unwind_RaiseException 19: 0000000000000600 80 FUNC GLOBAL DEFAULT 1 _Unwind_Resume 20: 0000000000000680 80 FUNC GLOBAL DEFAULT 1 _Unwind_Resume_or_Rethrow 21: 0000000000000700 80 FUNC GLOBAL DEFAULT 1 _Unwind_SetGR 22: 0000000000000780 80 FUNC GLOBAL DEFAULT 1 _Unwind_SetIP 23: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __libunwind_Unwind_Backtrace 24: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __libunwind_Unwind_DeleteException 25: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __libunwind_Unwind_FindEnclosingFunction 26: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __libunwind_Unwind_ForcedUnwind 27: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __libunwind_Unwind_GetCFA 28: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __libunwind_Unwind_GetBSP 29: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __libunwind_Unwind_GetGR 30: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __libunwind_Unwind_GetIP 31: 0000000000000400 80 FUNC GLOBAL DEFAULT 1 _Unwind_GetIPInfo 32: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __libunwind_Unwind_GetLanguageSpecificData 33: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __libunwind_Unwind_GetRegionStart 34: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __libunwind_Unwind_RaiseException 35: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __libunwind_Unwind_Resume 36: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __libunwind_Unwind_Resume_or_Rethrow 37: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __libunwind_Unwind_SetGR 38: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __libunwind_Unwind_SetIP 39: 0000000000000000 80 FUNC GLOBAL DEFAULT 1 _Unwind_Backtrace@GCC_3.3 40: 0000000000000080 80 FUNC GLOBAL DEFAULT 1 _Unwind_DeleteException@GCC_3.0 41: 0000000000000100 80 FUNC GLOBAL DEFAULT 1 _Unwind_FindEnclosingFunction@GCC_3.3 42: 0000000000000180 80 FUNC GLOBAL DEFAULT 1 _Unwind_ForcedUnwind@GCC_3.0 43: 0000000000000200 80 FUNC GLOBAL DEFAULT 1 _Unwind_GetCFA@GCC_3.3 44: 0000000000000280 80 FUNC GLOBAL DEFAULT 1 _Unwind_GetBSP@GCC_3.3.2 45: 0000000000000300 80 FUNC GLOBAL DEFAULT 1 _Unwind_GetGR@GCC_3.0 46: 0000000000000380 80 FUNC GLOBAL DEFAULT 1 _Unwind_GetIP@GCC_3.0 47: 0000000000000480 80 FUNC GLOBAL DEFAULT 1 _Unwind_GetLanguageSpecificData@GCC_3.0 48: 0000000000000500 80 FUNC GLOBAL DEFAULT 1 _Unwind_GetRegionStart@GCC_3.0 49: 0000000000000580 80 FUNC GLOBAL DEFAULT 1 _Unwind_RaiseException@GCC_3.0 50: 0000000000000600 80 FUNC GLOBAL DEFAULT 1 _Unwind_Resume@GCC_3.0 51: 0000000000000680 80 FUNC GLOBAL DEFAULT 1 _Unwind_Resume_or_Rethrow@GCC_3.3 52: 0000000000000700 80 FUNC GLOBAL DEFAULT 1 _Unwind_SetGR@GCC_3.0 53: 0000000000000780 80 FUNC GLOBAL DEFAULT 1 _Unwind_SetIP@GCC_3.0
Created attachment 308601 [details] Output of emerge --info on CHOST
Some observations: gcc does not install libunwind.a/.so when --disable-shared flag is passed: gcc-4.6.2/work/build/ia64-unknown-linux-gnu/libgcc/Makefile: ifeq ($(enable_shared),yes) iterator = $(srcdir)/empty.mk $(patsubst %,$(srcdir)/shared-object.mk,$(iter-items)) install-shared = install-shared ifneq ($(LIBUNWIND),) install-libunwind = install-libunwind endif ... install-leaf: $(install-shared) $(install-libunwind) and it makes glibc sad. @toolchain ninjas: In --disable-shared libunwind* contents should sit in libgcc.a, right?
I guess it's a simple as libgcc-objects += $(libunwind-objects) but i can't figure where to plug it to not break all the targets.
glibc build broke when this commit was made: http://sources.gentoo.org/sys-libs/glibc/files/eblits/src_compile.eblit?r1=1.19&r2=1.20 (In reply to comment #3) that wouldn't help because the static unwind objects do not contain __libunwind_xxx symbols. they only show up in the shared objects. in an ia64 build with shared libs, libgcc.a wouldn't refer to __libunwind_xxx either. only libgcc_s.so would. nor would libunwind.a contain the symbols, only libunwind.so. __libunwind_Unwind_GetBSP ./libgcc_s.so.1 __libunwind_Unwind_GetBSP ./unwind-compat_s.o __libunwind_Unwind_GetBSP ./libunwind.so.7 __libunwind_Unwind_GetBSP ./unwind-ia64_s.o
gcc could be made to work ... but i'm not sure if it's worth it: - if enable_shared == no, then add the unwind objs to libgcc.a - if enable_shared == no, build unwind-ia64.o with -DLIBUNWIND_ALIASES - edit gcc/config/ia64/unwind-ia64.c and change it to: ... && (defined(SHARED) || defined(LIBUNWIND_ALIASES)) && ... i've restored the glibc hack in the mean time: http://sources.gentoo.org/sys-libs/glibc/files/eblits/src_compile.eblit?r1=1.23&r2=1.24
