https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64855
--- Comment #2 from Richard Henderson <rth at gcc dot gnu.org> --- I apologize for my mis-diagnosis earlier. These tests are not expected to pass on Darwin at present. Disabling them in the testsuite is the best thing to do for now. Long term, someone needs to figure out the problems with Darwin in the upstream libffi respository, so we can move Darwin onto the shared code base with the rest of the x86 ports.