[all-commits] [llvm/llvm-project] 9a90aa: [libc++][modules] Add using_if_exists attribute (#...

[Gareth Williamson via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9a90aa01edfc5a56d975658a0cbbfa980a0ef7ed
      https://github.com/llvm/llvm-project/commit/9a90aa01edfc5a56d975658a0cbbfa980a0ef7ed
  Author: Gareth Williamson <gwllx.dev at gmail.com>
  Date:   2024-01-22 (Mon, 22 Jan 2024)

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

  Log Message:
  -----------
  [libc++][modules] Add using_if_exists attribute (#77559) (#78909)

libc on macOS does not provide at_quick_exit or quick_exit. This allows
modules to build on macOS and defer any errors to usage site of these
symbols.

Fixes: https://github.com/llvm/llvm-project/issues/77559