The foreach-endforeach syntax can be used to express the repetition of certain tasks over a list of variables. In our case, we used it to manipulate, set, and get the compiler flags of specific files in the project. This CMake snippet introduced two additional new commands:
- set_source_files_properties(file PROPERTIES property value), which sets the property to the passed value for the given file. Much like targets, files also have properties in CMake. This allows for extremely fine-grained control over the build system generation. The list of available properties for source files can be found here: https://cmake.org/cmake/help/v3.5/manual/cmake-properties.7.html#source-file-properties.
- get_source_file_property(VAR file property) ...
