[libcxx-commits] [libcxx] [libc++] Allows any types of size 4 and 8 to use native platform ulock_wait (Proof of Concept) (PR #161086)

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huixie90 wrote:

sure i am doing it. the puzzle i have is that: imagine we compile a program with new libc++ header, it will use the new symbol. when the program is targeted as old os and deploy there, the new symbol does not exist, it means that the atomic::wait/notify will not work on the old system.  how will availability help in this case?

https://github.com/llvm/llvm-project/pull/161086