[libcxx-commits] [libcxx] [libc++] Enable C++ stdatomic.h for all C++ versions (PR #95498)

[Louis Dionne via libcxx-commits]

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@@ -589,10 +589,6 @@ template <class T>
 
 #include <__config>
 
-#if _LIBCPP_STD_VER < 23 && defined(_LIBCPP_STDATOMIC_H)
-#  error <atomic> is incompatible with <stdatomic.h> before C++23. Please compile with -std=c++23.
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ldionne wrote:

Why do we claim that `<atomic>` is incompatible with `<stdatomic.h>` before C++23? Can you refresh my memory? In other words, what changed in C++23 that made the header compatible?

https://github.com/llvm/llvm-project/pull/95498