CMake is anarchy. In order to do it better, here's an example project that contains the following structure:

• A library foo that privately depends on Boost::date_time and provides some functionality.
• A library bar that solely depends on foo.
• An executable baz that calls a method in bar.

All projects are set up in a way that they can be installed and found using find_package(), as well as added using add_subdirectory(). The CMakeLists.txt files are heavily documented, but care should be taken to also have a look at the cmake/*-cmake.in files of the individual libraries.

Each installation is versioned, allowing for keeping multiple different versions at the same time. Likewise, installation paths are prefixed with the build configuration.

Blog posts and repositories that helped in assembling this:

• It's Time To Do CMake Right by Pablo Arias and the companion repo
• modern-cmake-sample, as well as
• Easily supporting CMake install and find_package() by Jonathan Müller.