http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46210
--- Comment #1 from Hans-Werner Boschmann <boschmann at tp1 dot physik.uni-siegen.de> 2010-10-28 12:23:15 UTC --- (In reply to comment #0) Sorry, I was to quick. The reason is already given in the valgrind output. The stack size is to small. So it's neither gcc's fault nor openmp's fault.