The code for this recipe is available at https://github.com/dev-cafe/cmake-cookbook/tree/v1.0/chapter-01/recipe-10 and has a C++ example. The recipe is valid with CMake version 3.5 (and higher) and has been tested on GNU/Linux, macOS, and Windows.
We have used if-elseif-endif constructs in previous recipes of this chapter. CMake also offers language facilities for creating loops: foreach-endforeach and while-endwhile. Both can be combined with break for breaking from the enclosing loop early. This recipe will show you how to use foreach to loop over a list of source files. We will apply such a loop to lower the compiler optimization for a set of source files without introducing a new target.
