Because Darwin does not implement sem_init correctly all the tests timeout. One way of fixing this is to change libgomp for Darwin to use the mach semaphores. Another way is to use named semaphores.
-- Summary: All libgomp tests timeout on ppc-darwin Product: gcc Version: 4.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libgomp AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: pinskia at gcc dot gnu dot org GCC target triplet: powerpc-darwin http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25978