http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52042
--- Comment #8 from Jack Howarth <howarth at nitro dot med.uc.edu> 2012-02-07 21:15:00 UTC --- (In reply to comment #7) While I haven't done a full bootstrap, applying the patch from comment 6 and remaking the current build reduces the libitm failures to just... FAIL: libitm.c++/eh-1.C execution test at -m32/-m64 on x86_64-apple-darwin11 so this patch also eliminates the stackundo.c execution failure.