The basics of the CMake language syntax
Composing CMake code is very much like writing in any other imperative language: lines are executed from top to bottom and from left to right, occasionally stepping into an included file or a called function. The starting point of execution is determined by the mode (see the Mastering the command line section in Chapter 1, First Steps with CMake), either from the root file of the source tree (CMakeLists.txt) or a .cmake script file provided as an argument to cmake.
Since CMake scripts offer extensive support for the CMake language, except for project-related features, we will utilize them to practice CMake syntax in this chapter. Once we become proficient in composing simple listfiles, we can advance to creating actual project files, which we will cover in Chapter 4, Setting Up Your First CMake Project.
As a reminder, scripts can be run with the following command: cmake -P script.cmake.
CMake supports 7-bit ASCII text files...
