[3.9] bpo-42692: fix __builtin_available check on older compilers (GH-23873) by miss-islington · Pull Request #24090 · python/cpython
A compiler that doesn't define __has_builtin will error out when it is
used on the same line as the check for it.
Automerge-Triggered-By: GH:ronaldoussoren
(cherry picked from commit df21f50)
Co-authored-by: Joshua Root jmr@macports.org