[all-commits] [llvm/llvm-project] 8406f8: [mlir][cmake] Enable -Wundef. (#84011)

[Ingo Müller via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8406f8023dc08a1697acd2375e120670c0233a8a
      https://github.com/llvm/llvm-project/commit/8406f8023dc08a1697acd2375e120670c0233a8a
  Author: Ingo Müller <ingomueller at google.com>
  Date:   2024-03-06 (Wed, 06 Mar 2024)

  Changed paths:
    M mlir/CMakeLists.txt
    M mlir/include/mlir/Config/mlir-config.h.cmake

  Log Message:
  -----------
  [mlir][cmake] Enable -Wundef. (#84011)

This is another follow-up of #83004, which fixed a bug due to some
macros not being defined in some situations. By raising warnings on
undefined macros, this kind of bug is less likely to be introduced.
Similar to #83004, the fix is probably adding an include to
`mlir-config.h` (and potentially defining the macro there).



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