I would have thought something more or less along these lines:

I'm still just struggling with the idea that it's probably better to tell the compiler to prefer files from platform_source over files from master_source and avoid this whole silly copying business (gripes over apparent negligence towards code modularity notwithstanding).

jeje, it's really better, but the company is working with batch files (Windows XP), and that's my idea to reduce compiling time. It would really take a long time to modify all source files along with creating Makefiles. For now I just will create makefile, repeating steps of batch files. Anyway thanks for replys. Good luck!