It's called Minimal CMake, and was published on January 3rd, 2025 by Packt. You can find a (non-affiliate) link to the book on amazon.co.uk here, and amazon.com here. There's a full accompanying repo ...

Contrary to popular belief, it can be used in commercial software! (Even Bill Gates could use it.) To build FLTK 1.5 and higher you need: CMake a C++11 capable compiler, e.g. gcc, clang, Visual Studio ...