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+makefile2graph (creates a dependency graph from a Makefile)
+
+Creates a graph of dependencies from GNU make Makefile.
+
+Output is a graphviz dot file, a Gexf-XML file, or a list of the deepest
+independent targets that should be made. Sub-Makefiles are not supported.
+
+Optional dependencies: To actually generate visual graphs, you will need
+or or both of:
+
+graphics/graphviz
+graphics/graph-easy
+
+Example: If there's a Makefile in the current directory, try this:
+
+ make -Bnd | make2graph | dot -Tpng > graph.png