https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81797
--- Comment #36 from Jonathan Wakely <redi at gcc dot gnu.org> --- 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).