Both are the problems. Because of side effects, when single cmake file modified, the whole project need to be regenerated. Also, because of side effects, proj

Both are the problems. Because of side effects, when single cmake file modified, the whole project need to be regenerated. Also, because of side effects, project files become too frigile, for example, changing the order of two includes may result in incorrect project definition. And makefile generation part is problematic: using timestamps to check if something need to be rebuilt is unreliable (may result in not rebuilding something when project is actually changed).