[libcxx-commits] [libcxx] [libc++] Fix local runs of the bootstrapping-build job (PR #166875)

[Nikolas Klauser via libcxx-commits]

https://github.com/philnik777 commented:

IMO it'd be better if we just require `CC` and `CXX`. These defaults are probably wrong on most systems. For the CCACHE part I'd be much happier if we don't use any unless the user explicitly sets `CCACHE`.

https://github.com/llvm/llvm-project/pull/166875