The .callgraph macros generate a directed graph of function calls in the graphviz format. Functions are vertices, while function calls are edges.
m4s .callgraph | dot -Tpng -o callgraph.png
This image has been cropped to fit the restraints of web formatting. To the right is the IVT and its handlers.
Prints the callgraph in fdp's style, formatted to fit a single US Letter page.
Prints the callgraph in postscript, formatted to fit a single US Letter page.
Display the callgraph in various viewers.