http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56002
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2013-01-17 16:19:19 UTC --- Yep, I'm fixing it. I went to add a test for locks that wouldn't rely on thread support and found I'd already added one ages ago: http://gcc.gnu.org/viewcvs/trunk/libstdc%2B%2B-v3/testsuite/30_threads/lock_guard/cons/1.cc?revision=185390&content-type=text%2Fplain&view=co That just needs the dejagnu target selectors removed so it always runs.