[llvm-branch-commits] [libcxx] [libc++] Stop copying headers to the build directory (PR #115380)

[Alexander Richardson via llvm-branch-commits]

arichardson wrote:

Thanks for the review - will merge once https://github.com/llvm/llvm-project/pull/115387 has landed and CI is happy.

https://github.com/llvm/llvm-project/pull/115380