Package: gcc-4.3 Version: 4.3.4-5 Severity: normal (I'm guessing that this is a compiler bug, but it could conceivably be the linker or some other toolchain component; if so, please reassign.)
As described in <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=546823>, libcap-ng0 0.6.1 contains a __thread variable. When built with -O0 it seems to work fine, but when built with -O1 or -O2 dereferencing that variable causes a segfault. This appears to be related to this linker warning, which does not appear under -O0: > gcc -shared .libs/cap-ng.o .libs/lookup_table.o -Wl,-z -Wl,relro > -Wl,-z -Wl,defs -Wl,-soname -Wl,libcap-ng.so.0 -o > .libs/libcap-ng.so.0.0.0 > /usr/bin/ld: .libs/cap-ng.o(.text+0x810): R_ARM_GOTOFF32 used with TLS > symbol m > /usr/bin/ld: .libs/cap-ng.o(.text+0xc1c): R_ARM_GOTOFF32 used with TLS > symbol m To test this it is sufficient to compile libcap-ng with the desired option, then run "make check". The test program will segfault if optimizations were used. I tried this in both squeeze and sid environments. At my suggestion, the libcap-ng maintainer has worked around this bug by turning off optimization on armel. If this bug in the toolchain is fixed, the optimizations should be reinstated. Pierre, could you please mention this bug# next to the workaround in debian/rules in future versions? Sorry, I should have filed this before sending you the patch... Regards, S -- System Information: Debian Release: squeeze/sid APT prefers testing APT policy: (500, 'testing'), (101, 'unstable') Architecture: armel (armv5tel) Kernel: Linux 2.6.30-1-kirkwood Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Versions of packages gcc-4.3 depends on: ii binutils 2.19.91.20091006-1 The GNU assembler, linker and bina ii cpp-4.3 4.3.4-5 The GNU C preprocessor ii gcc-4.3-base 4.3.4-5 The GNU Compiler Collection (base ii libc6 2.9-25 GNU C Library: Shared libraries ii libgcc1 1:4.4.1-4 GCC support library ii libgomp1 4.4.1-4 GCC OpenMP (GOMP) support library Versions of packages gcc-4.3 recommends: ii libc6-dev 2.9-25 GNU C Library: Development Librari Versions of packages gcc-4.3 suggests: pn gcc-4.3-doc <none> (no description available) pn gcc-4.3-locales <none> (no description available) pn libgcc1-dbg <none> (no description available) pn libgomp1-dbg <none> (no description available) pn libmudflap0-4.3-dev <none> (no description available) pn libmudflap0-dbg <none> (no description available) -- no debconf information
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