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
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