https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81797
--- Comment #38 from Chris Johns <chrisj at rtems dot org> --- (In reply to Jonathan Wakely from comment #36) > Also, this strongly suggests the problem for RTEMS is different: > > (In reply to Chris Johns from comment #24) > > I would welcome a patch attached to this ticket. > > > > My efforts with .NOTPARALLEL cannot get RTEMS's cross-compiled tools to > > build. I have seen a build work however most fail with a range of headers > > that can vary from build to build. I can see the massive `ln -s` happening > > and after the build fails and stops all the links are present. > > > i.e. this *is* a target issue (and there should be a separate PR for RTEMS). I am not sure yet. If the .NOTPARALLEL does work and is suitable for integration I would have expected it to have worked for me. There is something happening I do not understand. FYI I do not see any build errors with the same version of MacOS on different hardware running HPFS. It is a different machine with a Fusion disk and that disk is not supported by APFS.