Somewhere, probably at the top-level, an Examples directory could be created.
In there a sub directory could contain a small main function along with a CMakeLists.txt file. In that CMakeLists.txt file we should relay on this installation of mx and use find_package( mx ). During continuous integration runs, we should add a step where we make install then cd to the example and build it. If mx installation isn't working, that build should fail. If mx installation is working, that build should succeed.