Bug 605524 – sys-devel/clang: '-static -rtlib=compiler-rt' causes missing symbols

• Product: Gentoo Linux
• Status: RESOLVED OBSOLETE

[Description Amit Prakash Ambasta 2017-01-13 05:50:39 UTC]

Hi, 

On building tini the following error is thrown:

/usr/lib/gcc/x86_64-pc-linux-gnu/5.4.0/../../../../lib64/libc.a(iofclose.o): In function `_IO_new_fclose':
iofclose.c:(.text+0x274): undefined reference to `_Unwind_Resume'
/usr/lib/gcc/x86_64-pc-linux-gnu/5.4.0/../../../../lib64/libc.a(iofflush.o): In function `_IO_fflush':
iofflush.c:(.text+0x159): undefined reference to `_Unwind_Resume'
/usr/lib/gcc/x86_64-pc-linux-gnu/5.4.0/../../../../lib64/libc.a(iofwrite.o): In function `_IO_fwrite':
iofwrite.c:(.text+0x1f1): undefined reference to `_Unwind_Resume'
/usr/lib/gcc/x86_64-pc-linux-gnu/5.4.0/../../../../lib64/libc.a(wfileops.o): In function `_IO_wfile_underflow':
wfileops.c:(.text+0x6f8): undefined reference to `_Unwind_Resume'
/usr/lib/gcc/x86_64-pc-linux-gnu/5.4.0/../../../../lib64/libc.a(fileops.o): In function `_IO_new_file_underflow':
fileops.c:(.text+0x496): undefined reference to `_Unwind_Resume'
/usr/lib/gcc/x86_64-pc-linux-gnu/5.4.0/../../../../lib64/libc.a(backtrace.o): In function `backtrace_helper':
backtrace.c:(.text+0x24): undefined reference to `_Unwind_GetIP'
backtrace.c:(.text+0x30): undefined reference to `_Unwind_GetCFA'
/usr/lib/gcc/x86_64-pc-linux-gnu/5.4.0/../../../../lib64/libc.a(backtrace.o): In function `__backtrace':
backtrace.c:(.text+0xbc): undefined reference to `_Unwind_Backtrace'
/usr/lib/gcc/x86_64-pc-linux-gnu/5.4.0/../../../../lib64/libc.a(fprintf_chk.o): In function `___fprintf_chk':
fprintf_chk.c:(.text+0x1e9): undefined reference to `_Unwind_Resume'
/usr/lib/gcc/x86_64-pc-linux-gnu/5.4.0/../../../../lib64/libc.a(iofputs.o): In function `_IO_fputs':
iofputs.c:(.text+0x182): undefined reference to `_Unwind_Resume'
/usr/lib/gcc/x86_64-pc-linux-gnu/5.4.0/../../../../lib64/libc.a(iogetdelim.o): In function `_IO_getdelim':
iogetdelim.c:(.text+0x316): undefined reference to `_Unwind_Resume'
/usr/lib/gcc/x86_64-pc-linux-gnu/5.4.0/../../../../lib64/libc.a(fseek.o): In function `fseek':
fseek.c:(.text+0x14d): undefined reference to `_Unwind_Resume'
/usr/lib/gcc/x86_64-pc-linux-gnu/5.4.0/../../../../lib64/libc.a(ftello.o): In function `__ftello':
ftello.c:(.text+0x1e2): undefined reference to `_Unwind_Resume'
/usr/lib/gcc/x86_64-pc-linux-gnu/5.4.0/../../../../lib64/libc.a(ioseekoff.o):ioseekoff.c:(.text+0x224): more undefined references to `_Unwind_Resume' follow
/usr/bin/../lib/clang/3.9.1/lib/linux/libclang_rt.builtins-x86_64.a(gcc_personality_v0.c.o): In function `__gcc_personality_v0':
/home/portage/portage/sys-devel/llvm-3.9.1/work/llvm-3.9.1.src/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:(.text.__gcc_personality_v0+0x27): undefined reference to `_Unwind_GetLanguageSpecificData'
/home/portage/portage/sys-devel/llvm-3.9.1/work/llvm-3.9.1.src/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:(.text.__gcc_personality_v0+0x45): undefined reference to `_Unwind_GetIP'
/home/portage/portage/sys-devel/llvm-3.9.1/work/llvm-3.9.1.src/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:(.text.__gcc_personality_v0+0x52): undefined reference to `_Unwind_GetRegionStart'
/home/portage/portage/sys-devel/llvm-3.9.1/work/llvm-3.9.1.src/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:(.text.__gcc_personality_v0+0x1a0): undefined reference to `_Unwind_SetGR'
/home/portage/portage/sys-devel/llvm-3.9.1/work/llvm-3.9.1.src/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:(.text.__gcc_personality_v0+0x1af): undefined reference to `_Unwind_SetGR'
/home/portage/portage/sys-devel/llvm-3.9.1/work/llvm-3.9.1.src/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:(.text.__gcc_personality_v0+0x1bf): undefined reference to `_Unwind_SetIP'
clang-3.9: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [CMakeFiles/tini-static.dir/build.make:95: tini-static] Error 1
make[2]: Leaving directory '/home/portage/portage/sys-process/tini-0.13.2/work/tini-0.13.2_build'
make[1]: *** [CMakeFiles/Makefile2:105: CMakeFiles/tini-static.dir/all] Error 2
make[1]: Leaving directory '/home/portage/portage/sys-process/tini-0.13.2/work/tini-0.13.2_build'


which shows libclang_rt.builtins-x86_64.a linking against TEMPDIR files

[Comment 1 Michał Górny 2017-01-13 08:59:28 UTC]

Looks like either -nodefaultlibs problem or something weird. It's missing -lunwind, and this should be added by libcxx linker script.

[Comment 2 Michał Górny 2017-01-13 17:30:39 UTC]

Ok, so it seems to be actually a problem in clang driver. The code in tini somehow makes use of gcc personality stuff, which requires unwinder library. I'll spawn creduce to figure the relevant code out soonish.

[Comment 3 Michał Górny 2017-01-13 17:43:57 UTC]

Ok, turns out it happens to all programs when using -static.

[Comment 4 Amit Prakash Ambasta 2018-08-20 10:00:07 UTC]

Does not impact >=sys-libs/compiler-rt-4.0.0, older removed from portage tree