SuccessChanges

Summary

  1. Refine check for `_LIBCPP_C_HAS_NO_GETS` on FreeBSD (details)
Commit d5367db95c4295b088bf9ae3cf99e24d8bf7e249 by dimitry
Refine check for `_LIBCPP_C_HAS_NO_GETS` on FreeBSD
Summary: In D67316 we added `_LIBCPP_C_HAS_NO_GETS` to signal that the C
library does not provide `gets()`, and added a test for FreeBSD 13 or
higher, using the compiler-defined `__FreeBSD__` macro.
Unfortunately this did not work that well for FreeBSD's own CI process,
since the gcc compilers used for some architectures define `__FreeBSD__`
to match the build host, not the target.
Instead, we should use the `__FreeBSD_version` macro from the userland
header `<osreldate.h>`, which is more fine-grained.  See also
<https://reviews.freebsd.org/D22034>.
Reviewers: EricWF, mclow.lists, emaste, ldionne
Reviewed By: emaste, ldionne
Subscribers: dexonsmith, bsdjhb, krytarowski, christof, ldionne,
libcxx-commits
Differential Revision: https://reviews.llvm.org/D69174
llvm-svn: 375340
The file was modifiedlibcxx/include/__config