New comment by ahesford on void-packages repository

https://github.com/void-linux/void-packages/pull/20218#issuecomment-622208538

Comment:
pybind11 upstream is still debating the right way to support CMake modules compatible with cross-compilation environments as in Void. However, the CMake modules are not used by the pybind11 headers; they are offered to support tests and as a convenience to dependent projects. I've opted not to install the CMake modules to avoid potential breakage for any new projects that might want to leverage pybind11. If upstream figures out a suitable method, we can add the CMake modules in a later release.

In the meantime, the `python3-pybind11` module remains useful without the CMake modules and should be ready to go.