[all-commits] [llvm/llvm-project] ddc0c5: [CMake] Do all availability checks with -D_GNU_SOU...

[Raul Tambre via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ddc0c5c7a3bb39067f11c87ab7ca0ed934ad27e7
      https://github.com/llvm/llvm-project/commit/ddc0c5c7a3bb39067f11c87ab7ca0ed934ad27e7
  Author: Raul Tambre <raul at tambre.ee>
  Date:   2024-11-20 (Wed, 20 Nov 2024)

  Changed paths:
    M llvm/cmake/config-ix.cmake

  Log Message:
  -----------
  [CMake] Do all availability checks with -D_GNU_SOURCE (#116640)

When compiling LLVM with -std=c++ instead of -std=gnu we'd fail to detect many newer POSIX functions.
We define it for the whole of LLVM anyway so moving the definition to the top fixes detection of a bunch of these on such setups.
Keeping it at the top also avoids accidentally introducing new dependent checks before it being defined.



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