[libcxx-commits] [libcxx] [libc++][z/OS] Move z/OS to new locale API and resolve all name collisions (PR #165428)

[Louis Dionne via libcxx-commits]

https://github.com/ldionne requested changes to this pull request.

I just did another pass at this after noticing z/OS is the last platform preventing us from removing the legacy locale base API.

However, there are a lot of things I don't understand about this PR as left in comments, and #198614 looks more straightforward to me.

https://github.com/llvm/llvm-project/pull/165428