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

[Mark de Wever via libcxx-commits]

mordante wrote:

Thanks for the info. That indeed means we don't know which header might get picked up. For now I disabled module testing for Windows. I can fix the `#error` (in LLVM 19), by not testing these headers on Windows. This is not a big issue we have other platforms were we can do these tests. They are intended to guard against forgetting to add exports when adding a new toplevel header.

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