[libc-commits] [libc] [libc] Implement fcntl() function (PR #89507)

[Michael Jones via libc-commits]

https://github.com/michaelrj-google approved this pull request.

Tests pass on my machine in both overlay and fullbuild modes. LGTM. Ping me when you want me to merge this for you.

https://github.com/llvm/llvm-project/pull/89507