[Bug libobjc/63765] [5.0 Regression] libobjc testsuite failures on AIX caused by setting _XOPEN_SOURCE

[ro at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63765

--- Comment #15 from Rainer Orth <ro at gcc dot gnu.org> ---
I've never received comments on my alternative patch.  Either that one, which I
prefer since it's cleaner) or the previous one (ugly and target-specific),
needs
to be applied to have AIX bootstrap, I believe.

What should we do?

  Rainer