https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113143
--- Comment #18 from Eric Gallager <egallager at gcc dot gnu.org> --- (In reply to Sergey Fedorov from comment #17) > (In reply to Eric Gallager from comment #15) > > This is one of the things blocking bug 46986, isn't it? > > ucontext is supported on macOS, AFAIK. Only on certain versions of it, though; review the discussion in 46986 for further details