[libc-commits] [libc] [libc] Add sys/eventfd.h header and eventfd function. (PR #234028)

[Pavel Labath via libc-commits]

https://github.com/labath approved this pull request.

This is a very cool API I wasn't aware of. Now I'm going to look for opportunities to use it :)

https://github.com/llvm/llvm-project/pull/234028