[Bug target/90835] Incompatibilities with macOS 10.15 headers

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90835

--- Comment #18 from Eric Gallager <egallager at gcc dot gnu.org> ---
Downstream MacPorts ticket related to this:
https://trac.macports.org/ticket/59113