[libc-commits] [libc] [libc] Remove LIBC_HAS_ATTRIBUTE macro (PR #86656)

[Nick Desaulniers via libc-commits]

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

Thanks for the patch!

Are you able to merge this, or do you need one of us to?

https://github.com/llvm/llvm-project/pull/86656