[CMake] handing dependencies in multi-file CMake setup?

[Ákos Maróy]

I'm wondering how is it possible to have CMake handle dependencies in a 
setup where multiple CMakeFiles.txt files are used, and there's a 
top-level CMake file including them with add_subdirectory()

I tried to use the add_dependencies() statement, but that only 'sees' 
targets that are defined in that very CMakeFiles.txt file. So it can't 
be used either in one of the project CMakeFiles, nor in the top-level 
CMakeFiles.


Akos