[all-commits] [llvm/llvm-project] 647ddc: [libc++] Add missing __has_include checks for C he...

[Louis Dionne via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 647ddc08f43c05131031cfe3c6114d7870f5a117
      https://github.com/llvm/llvm-project/commit/647ddc08f43c05131031cfe3c6114d7870f5a117
  Author: Louis Dionne <ldionne.2 at gmail.com>
  Date:   2022-11-23 (Wed, 23 Nov 2022)

  Changed paths:
    M libcxx/include/cassert
    M libcxx/include/csignal
    M libcxx/include/cstdarg
    M libcxx/include/ctime

  Log Message:
  -----------
  [libc++] Add missing __has_include checks for C headers not provided by libc++

This makes the library consistent in how it handles C library headers. For C headers provided by libc++,
we unconditionally include <foo.h> from <cfoo>, and then <foo.h> conditionally include_next <foo.h>.
For headers not provided by libc++, <cfoo> conditionally includes the system's <foo.h> directly.

Differential Revision: https://reviews.llvm.org/D138512