[libcxx-commits] [libcxx] [libc++] Silence CMake's install messages in the CI (PR #128872)

[Martin Storsjö via libcxx-commits]

mstorsjo wrote:

Thanks for this! I'll pick this to my other test configurations elsewhere as well, I've also been annoyed by the build logs being swamped by this output.

Btw, I wonder if it'd be possible to get rid of the `Copying CXX header ...` messages as well? But I doubt that's possible as it comes from a `add_custom_command` at https://github.com/llvm/llvm-project/blob/llvmorg-21-init/libcxx/include/CMakeLists.txt#L2093-L2096, and I guess that ninja either prints that message or the actual command that gets executed...

https://github.com/llvm/llvm-project/pull/128872