[vorbis-dev] compile optimization error in libvorbis-1.0

[vorbis at fuchs.offl.uni-jena.de]

On Fri, Jul 19, 2002 at 09:59:23PM -0500, Jeffrey Bridge wrote:
> Wow, I've never seen an FSF gcc crap out like this on a non-overheating
> system. When lib/envelope.c is compiled with -march=i686, gcc gets a
> signal 11, but not with -march=i586. I'm not sure whether to blame gcc
> or libvorbis. There are apparently three other files in libvorbis where
> this same behavior is seen.
> 
> jeffrey at diddl:/usr/src/build/libvorbis-1.0/lib$ gcc
> -DPACKAGE=\"libvorbis\" -DVERSION=\"1.0\" -DHAVE_DLFCN_H=1
> -DHAVE_ALLOCA_H=1 -DHAVE_ALLOCA=1 -DHAVE_SQRTF=1 -DHAVE_LOGF=1
> -DHAVE_EXPF=1 -DHAVE_ACOSF=1 -DHAVE_ATANF=1 -DHAVE_FREXPF=1
> -DHAVE_RINTF=1 -DHAVE_FLOORF=1 -I. -I. -I../include -I/usr/include
> -ffast-math -mno-ieee-fp -D_REENTRANT -fsigned-char -g -O2 -march=i686
> -DUSE_MEMORY_H -c envelope.c  -fPIC -DPIC -o .libs/envelope.lo
> gcc: Internal compiler error: program cc1 got fatal signal 11
> 
> Replacing i686 with i586 makes it work. This is with glibc 2.2.5, gcc
> 2.95.3 release.
> 
Can't be a problem of Vorbis. Even the worst C code should not generate a
SIGSEGV.

I've seen thius bug also with gcc-2.95.3. But there i686 generated a
SIGSEGV, i586 worked.


-- 
Frank Klemm

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