[libcxx-commits] [libcxx] [libc++][NFC] Refactor _LIBCPP_AVAILABILITY_HAS_* macros to always be defined (PR #71002)

[Heejin Ahn via libcxx-commits]

aheejin wrote:

I posted a new issue: https://github.com/llvm/llvm-project/issues/87012
But this basically contains the same question I posted here.

https://github.com/llvm/llvm-project/pull/71002