[libc-commits] [libc] [libc] Add Darwin mutex support via os_sync primitives (PR #167722)

[Shreeyash Pandey via libc-commits]

bojle wrote:

@SchrodingerZhu I've rebase and pushed. I think the current CI failures are a CI bug? ("tar not found"). Also, 59 checks, earlier there were about 22? 

https://github.com/llvm/llvm-project/pull/167722