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

[Schrodinger ZHU Yifan via libc-commits]

SchrodingerZhu wrote:

I don't think we really need to handle the failures imported from other CI changes, and the error does not seem relevant to me.

However, I would like to wait to see if we can get the position in queue for the libc `macOS-15` pipeline, thus we can check if our patch break anything for macOS. The queuing may take a while as macOS resources are quite limited.

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