[Bug target/90835] Incompatibilities with macOS 10.15 headers

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90835
Bug 90835 depends on bug 92719, which changed state.

Bug 92719 Summary: MacOS 10.15 Catalina build fails
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92719

           What    |Removed                     |Added
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             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |WORKSFORME