I am trying to use FetchContent to include a dependency that is a header-only C++ project. It does not need to be built. However, it contains a CMakeLists.txt file that builds its tests, and it is not doing it in a standard way. I would like to bypass the make step entirely, so as not to build the extraneous binary and not to see the warnings that it emits.

The official documentation for FetchContent looks more like an overview. I’m looking for a complete reference though. cmake --help-module FetchContent produces the same text as the link above.

After upgrading to CMake 3.30, this fine wrapper function …