digraph g {
	rankdir=LR;
	maino [label="main.o"];
	mainc [label="main.c"];
	libo [label="lib.o"];
	libc [label="lib.c"];
	libh [label="lib.h"];
	liba [label="lib.a"];
	main -> {maino liba}
	maino -> {mainc libh}
	libo -> {libc libh}
	liba -> libo;
};
