In CMake, creating build targets that don’t produce a final executable or library is achievable through the `add_custom_target()` command. This allows execution of specified commands at different stages of the build process. For example, a custom target might be used to generate source code, copy files, or run external tools. A simple example would involve creating a target that executes a script after compilation:
add_custom_target(run_my_script ALL COMMAND ${CMAKE_COMMAND} -E copy $ /some/destination/)This functionality provides significant flexibility and control over complex build pipelines. Managing ancillary tasks alongside core compilation and linking becomes streamlined. Historically, achieving similar results involved complex Makefile manipulations or relying on external scripting solutions. This method provides a more integrated and portable approach. This capability is especially valuable in projects involving code generation, pre- or post-processing steps, or the integration of external tools and resources directly within the build system.
