https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> --- > It looks like gnat1 was compiled with libgcc, which is not able to > handle unwinding on Darwin. > I suppose it must be linked without -static-libgcc Is there a specific change intended to do it and which doesn't work here?