Resolved. Using graphviz from oss-cad-suite where available and from a new package for windows.
GitHub

README.md

Doxygen is a tool that parses source code, finds specially-formatted comments, and produces nice-looking documentation files out of them. This repository is set up as an example that shows how Doxygen ...
Documenting your code is a critical part of development, but too many developers pay too little attention to proper commenting. C++ devs have a tool that can help. Javadoc is a standard tool that ...