[all-commits] [llvm/llvm-project] 6f6234: [libcxx] don't `#include <cwchar>` if wide chars a...

[Ties Stuij via All-commits]

  Branch: refs/heads/release/19.x
  Home:   https://github.com/llvm/llvm-project
  Commit: 6f623478d48c171d59e95b25ea2aca49dca8f135
      https://github.com/llvm/llvm-project/commit/6f623478d48c171d59e95b25ea2aca49dca8f135
  Author: Ties Stuij <ties.stuij at arm.com>
  Date:   2024-09-01 (Sun, 01 Sep 2024)

  Changed paths:
    M libcxx/include/format

  Log Message:
  -----------
  [libcxx] don't `#include <cwchar>` if wide chars aren't enabled (#99911)

Pull request #96032 unconditionall adds the `cwchar` include in the
`format` umbrella header. However support for wchar_t can be disabled in
the build system (LIBCXX_ENABLE_WIDE_CHARACTERS).

This patch guards against inclusion of `cwchar` in `format` by checking
the `_LIBCPP_HAS_NO_WIDE_CHARACTERS` define.

For clarity I've also merged the include header section that `cwchar`
was in with the one above as they were both guarded by the same `#if`
logic.

(cherry picked from commit ec56790c3b27df4fa1513594ca9a74fd8ad5bf7f)



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