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

[Daniel Thornburgh via libcxx-commits]

mysterymath wrote:

The clang cmake params are here:
https://logs.chromium.org/logs/fuchsia/buildbucket/cr-buildbucket/8758441999284862017/+/u/clang/configure/execution_details

It makes use of the Fuchsia.cmake present in the LLVM; this configures the build for both Windows host and Fuchsia target. It's the host part that's breaking.

I've verified that both `<spanstream>` and `<stacktrace>` are present in the Windows SDK given as `CMAKE_SYSROOT` when building clang.

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