When programming with multiple files/modules, dependency tracking is always a big issue. GNU Make calculates the correct order to compile in, but is only that smart. It does know that if a .cpp file changes, the corresponding .o file needs to be updated. But a change in an included header can go unnoticed.
While debugging a strange problem today, it was exactly that last scenario: A change in a header file did not cause a recompile, which left me debugging an old version of the binary. So I wanted to include the dependencies of .cpp files on the included headers in my Makefile. But since I’m too lazy to do it myself, I wrote a script.
