[libcxx-commits] [libcxx] [libc++][modules] Adds module testing. (PR #76246)

[Mark de Wever via libcxx-commits]

mordante wrote:

Thanks for reapplying the patch.
It sounds very scary when libc++ finds headers of the Windows SDK. This means our test suite does not test libc++ but libc++ and the different implementation. @ldionne is this something libc++ officially supports or should support? I don't expect we test this in our pre-commit CI.

https://github.com/llvm/llvm-project/pull/76246