Tim Prince wrote: > I don't remember what was said in the past, but any gcc function which > uses SSE parallel instructions must be called from a gcc function which > passes a 16-byte aligned stack. So you may be able to overcome it by > interposing a wrapper function at the thread entry point (which does not > use parallel SSE), with all gcc functions compiled with normal options > (not -Os, which sets a smaller value in -mpreferred-stack-alignment). > To speculate further, possibly your pthreads library was compiled with > options which don't pass 16-byte aligned stack. Thanks for the reply - no help though: By a wrapper function, if you mean for f() to call say g() - this makes no difference (command line: gcc -msse test.c -otest.exe). gcc doesn't seem to recognize -mpreferred-stack-alignment=8 as a valid option. I'm not using pthreads, so it's not that either. Jon
