Toolkit to extract internal dependencies from a project, manipulate
 the dependency graph in arbitrary ways, and produce graphs to help in
 managing your project, including locating abusive #includes.
 .
 It aims to be fully generic and pluggable, but is still under
 development. However, several aspects are already possible to
 customize. Eg, you can provide your own graph transformations,
 styling rules, and graph renderers.