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

[Ian Anderson via libcxx-commits]

================
@@ -7,16 +7,27 @@
 //
 //===----------------------------------------------------------------------===//
 
-#if defined(__need_ptrdiff_t) || defined(__need_size_t) || defined(__need_wchar_t) || defined(__need_NULL) ||          \
-    defined(__need_wint_t)
+#if defined(__need_ptrdiff_t) || defined(__need_size_t) || defined(__need_rsize_t) || defined(__need_wchar_t) ||       \
----------------
ian-twilightcoder wrote:

No one's really sure why it's important for the `__need_` macros to be perfectly strict. Trying out https://github.com/llvm/llvm-project/pull/86843 internally. We're still talking about if we want to keep this PR for the tests and copy stddef.h from that one, or dump the tests and just do 86843 by itself.

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