https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90330
--- Comment #6 from Matt Thompson <matthew.thompson at nasa dot gov> --- (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).