[libcxx-commits] [libcxx] [libcxx] Passthrough the necessary CMake variables to benchmarks (PR #116644)

[Petr Hosek via libcxx-commits]

petrhosek wrote:

I'm going to land this change because our builders have been broken since https://github.com/llvm/llvm-project/pull/115361 landed and I'm not getting any response from @ldionne.

https://github.com/llvm/llvm-project/pull/116644