Hello, I’m starting out slowly on a similar adventure.
My take was on using the “official” build of ccache for windows now that one is available, as in https://github.com/networkupstools/nut/blob/master/.travis.yml#L931 and prefixes “ccache” expicitly into “CC” or “CXX” definition as in https://github.com/networkupstools/nut/blob/master/ci_build.sh#L207 (this was needed anyway to support builds on Unix/Linux envs with non-default compilers that did not install their symlinks into ccache dir).
Per my questions at Install ccache on Windows there should also be a chocolatey package available. And if your project is not tightly married to ccache, someone there suggested a Mozilla sccache which seems decent from the project README.
Another problem I have is lack of autotools so the project can not go from configure.ac to actually building 
A discussion at Install Autoconf / automake pointed to https://github.com/tanzislam/cryptopals/blob/master/.travis.yml#L131 to prepare the environment… maybe I’ll try that too.
Hope this helps,
Jim Klimov