Doxyfiles are kinda old.

[geoff-nixon]

And they emit a bunch of warnings saying so. The main one (used with make doc) is set to optimize for C (no classes) and in fact only looks for *.h and *.c files.

Doxygen 1.3.9.1 was released mid-2004, I think?

I have a patch, but it is probably overkill (~50MiB, SVG graphs).

[zanchey]

(For those playing at home, the patch linked is a gzipped tar containing an xzipped tar containing the output of doxygen - not something I think we will merge.)

Yes, and the Doxyfiles for the user documentation are similarly out of date. I don't know how Doxygen behaves in the face of options it doesn't understand, but we could upgrade to at least 1.5.

[geoff-nixon]

Yes, I hadn't meant to say that the docset I linked should be merged; it was just to show what could potentially be done were the doxyfiles updated.

[zanchey]

This should be fixed with #1662.