http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43341
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-04-26 20:04:39 UTC --- (In reply to comment #4) > gcc -fpack-struct=4 -fprofile-generate test.c -fpack-struct changes the ABI so it is not fully a bug there.