[Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2

[juergen.reuter at desy dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89864

--- Comment #63 from Jürgen Reuter <juergen.reuter at desy dot de> ---
I confirm that the fix in comment #48 works also with MACOSX 10.14.4, XCode
10.2 on gcc trunk, as of r270245.