https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90330
--- Comment #7 from Iain Sandoe <iains at gcc dot gnu.org> --- (In reply to Matt Thompson from comment #6) > (In reply to Iain Sandoe from comment #5) > > (In reply to Matt Thompson from comment #4) > > > Also: I do have all the log files still, so if you'd like anything grep'ed > > > in there, let me know. > > > > not at this time.. I am trying to figure out what is different about our > > configurations. > > > > --- > > > > can you confirm that this was a clean build (including that the target > > install directory was deleted before the build?) > > It was a clean build. I always build out-of-source so it was a new directory > and I'd never installed GCC 9.1.0 before, so the install directory was new > as well. > > Let me try building again in a new directory with a new install location. Of > course, being the impressive GCC build, it might be Monday before I can > report back (it's a work laptop that stays at work). OK thanks, as it happens I won't be able to try on Darwin18 before next Weds, so no hurry.