We wrote several Makefiles from scratch at work. And a dependency-graph-of-thing-we-work-with to Makefile generator, like the output of gcc -M does. In fact i

We wrote several Makefiles from scratch at work. And a dependency-graph-of-thing-we-work-with to Makefile generator, like the output of gcc -M does. In fact its a whole build system using gnu make, written from scratch.