I experienced the same problem with libx264 (2:0.123.2189+git35) using ffmpeg.
After reading http://ffmpeg.org/pipermail/ffmpeg-devel/2013-March/141083.html I added '-fno-aggressive-loop-optimizations' to CFLAGS and libx264 does not crash on initialization anymore.
I experienced the same problem with libx264 (2:0.123. 2189+git35) using ffmpeg.
After reading http:// ffmpeg. org/pipermail/ ffmpeg- devel/2013- March/141083. html I added '-fno-aggressiv e-loop- optimizations' to CFLAGS and libx264 does not crash on initialization anymore.