https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90835
--- Comment #20 from Iain Sandoe <iains at gcc dot gnu.org> --- As of XCode 11.3beta, the contained SDK works OK: https://gcc.gnu.org/ml/gcc-testresults/2019-11/msg01439.html We still have the underlying problems - which need to be addressed (so please don't close this PR yet) - but for now using the latest SDK should work.
