[PATCH] D29818: [libcxx] Threading support: Attempt to externalize system_clock::now() and steady_clock::now() implementations

[Jonathan Roelofs via Phabricator via cfe-commits]

jroelofs added a comment.

In https://reviews.llvm.org/D29818#700949, @ed wrote:

> Worth mentioning: the latest version of macOS now supports `clock_gettime()`. Maybe better to leave the code as is and simply axe the Mach time code at some point in the future?


Supporting only the latest and greatest is unfriendly to folks who are stuck on particular versions...


https://reviews.llvm.org/D29818