[libcxx-commits] [libcxx] [libc++] stddef.h needs to #include_next for the new clang __need_ macros (PR #86252)

[Louis Dionne via libcxx-commits]

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ldionne wrote:

Let's rename to `stddef.needs.verify.cpp` or `stddef_needs.verify.cpp`.

https://github.com/llvm/llvm-project/pull/86252