GraphViz: which graph library to use?

Question

I've just started developing a small C++ program using GraphViz's graph library and noticed there are actually three different API's: libgraph, libcgraph and libagraph. WTF?

I would like to know what is the difference between them, which one to use and where to look for API documentation. I have looked at the GraphViz documentation and mailing list archives but I've found many broken links, lots of wrong or misleading information and now I'm confused.

Answer 1

Looks like one should use libcgraph, compiling with the flags given by pkg-config libcgraph --cflags --libs and including #include <cgraph.h>.