https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80204
--- Comment #1 from simon at pushface dot org --- macOS 10.12.4 includes kernel version 16.5.0. The command line tools have been updated: clang cc1 is now version 8.1.0 (clang-802.0.38). It still specifies -macosx_version_min 10.12.0 at link time.
