https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82092
--- Comment #16 from Eric Gallager <egallager at gcc dot gnu.org> --- (In reply to Ryan Schmidt from comment #15) > Yes, I noticed Homebrew had the update, and I didn't understand why it > worked there. But now I do. > > Some more information has turned up in a new MacPorts ticket: > > https://trac.macports.org/ticket/56521 > > In MacPorts gcc ports, we use --with-as=/opt/local/bin/as (this assembler is > provided by our cctools port). This change was made in MacPorts 6 years ago > by Jeremy who reported this bug, though I'm not entirely sure why. > > I suspect the problem is that our cctools port is currently at version 895, > which corresponds to what's in Xcode 8.1, and that's apparently too old to > work properly in this case. I am able to get a more recent snapshot to build > if I instead use --with-as=/usr/bin/as, so perhaps we either need to do that > in MacPorts or we need to update our cctools port to a more recent version. Please let us know how your update goes!