[PATCH] D157757: [Headers] Replace __need_STDDEF_H_misc with specific __need_ macros

[Ian Anderson via Phabricator via cfe-commits]

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Apple needs __need_ macros for rsize_t and offsetof. Add those, and also ones for nullptr_t, unreachable, max_align_t.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D157757

Files:
  clang/lib/Headers/stddef.h
  clang/test/Headers/stddef.c
  clang/test/Headers/stddefneeds.c

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