[all-commits] [llvm/llvm-project] b9b738: [libcxx] [modules] Add _LIBCPP_USING_IF_EXISTS on ...

[Martin Storsjö via All-commits]

  Branch: refs/heads/release/18.x
  Home:   https://github.com/llvm/llvm-project
  Commit: b9b73814ad8acd55e88d0415f4110d272797697d
      https://github.com/llvm/llvm-project/commit/b9b73814ad8acd55e88d0415f4110d272797697d
  Author: Martin Storsjö <martin at martin.st>
  Date:   2024-04-25 (Thu, 25 Apr 2024)

  Changed paths:
    M libcxx/modules/std.compat/cstdlib.inc

  Log Message:
  -----------
  [libcxx] [modules] Add _LIBCPP_USING_IF_EXISTS on aligned_alloc (#89827)

This is missing e.g. on Windows. With this change, it's possible to make
the libcxx std module work on mingw-w64 (although that requires a few
fixes to those headers).

In the regular cstdlib header, we have _LIBCPP_USING_IF_EXISTS flagged
on every single reexported function (since
a9c9183ca42629fa83cdda297d1d30c7bc1d7c91), but the modules seem to only
have _LIBCPP_USING_IF_EXISTS set on a few individual functions, so far.

(cherry picked from commit 91526d64a8adb14edc55adfd5270858791822837)



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