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I am aware of this post. However:

  • I can use either Linux or Windows, not just Windows (vastly increasing overall options)
  • That post is ancient and tools have come and gone since then
  • I have tried those mentioned and am looking for alternatives

What tools are available for creating UML Class Diagrams from a set of .h or .cpp files?

I am looking for something that...

  • Is free
  • Runs out of the box on Windows OR Linux
  • Either does not require an IDE, or works with QTCreator (which my project is based on)
  • Has a GUI
  • At least gets the attributes and methods. If it can't get the complicated parts, that's fine.
  • At least runs with "impure" C++ (Has macros and other pre-processor steps)

Here is what I have tried so far:

  • StarUML: While it has an addon that performs reverse engineering, the results were mediocre. I think it may have been broken. Every class was named "Class" in the sidebar. The "overview" for the module I was interested in was several boxes, with the name of an enumeration or class. They were otherwise empty, and several were missing.

  • QTCreator offers modeling. I can create a new model and drag a .h file into it, but the results is just an empty class - attributes and methods did not carry over.

  • Dia with cpp2dia - I cannot get this to work. Definitely doesn't work "out of the box", requires some configuration that I cannot follow.

  • BoUML - Won't work, the C++ has pre-processor directives.

  • Doxygraph: Only works if the entire code-base is covered by Doxygen properly, as far as I can tell. This project is not.

  • Modelio: Can't install, relies on some old packages that Fedora 29 no longer supports.

  • Umbrello: Looked promising, crashed when I attempted to do the import of the module I wanted the diagrams of.

  • Visual Paradigm doesn't work if there are macros...unless you define every single macro for it in advance. There's too many to do by hand in this code, not feasible.

Things I may try as a last resort:

  • WhiteStarUML: I already tried StarUML.

  • ArgoUML: Can't figure out how to install this addon or fork of ArgoUML that has reverse-engineering for C++ here. Looks fairly dead, given 12 years with no update.

  • I don't know DoxyGraph, but maybe you can set there in the doxygen configuration file (Doxyfile) the settings EXTRACT_ALL, EXTRAC_STATIC etc. to YES to get a full / better coverage. – albert Dec 2 '19 at 12:09
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I am a big fan of SAP Powerdesigner which runs on Windows.

It is commercial and expensive. But there still is a one-month trial license. Powerdesigner is a database reverse-engineering tool, but it has a so-called "Object-Oriented Modeling" Module which can reverse-engineer Java Code, and to a limited extent C++ code.

Powerdesigner's main strength lies on relational databases, and, therefore, on building classes for Object-Relational Mappers mainly in Java (but C++ as a target language is also offered).

But Powerdesigner has good programmability features, and you could write your own importers and finetune the built-in C++ metamodel. That's quite a bit of work to learn the built-in DSL and scripting engine, but you might give it a try.

I don't know how well the C++ reverse engineering feature works with C++ macros.

SAP has acquired Sybase in 2011, and since then the product has been even more paywalled and somewhat orphaned. It is still being sold but I think the devteam is quite small.

Here is a screenshot but right now I am not able to show you rev eng GUI/capabilities in a screenshot.

enter image description here

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