[libc-commits] [libc] [libc] Include CheckCXXCompilerFlag when checking compiler features (PR #118862)

[Joseph Huber via libc-commits]

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@@ -1,3 +1,5 @@
+include(CheckCXXCompilerFlag)
+
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jhuber6 wrote:

Move below the header comments.

https://github.com/llvm/llvm-project/pull/118862