I've been using Doxygen a bit and recently have had to rebuild
it on my system.  Doxygen now requires graphviz in order to
build.  I don't really need graphviz, and the license is just too
long to read carefully when I don't really want to use graphviz
at all.

Can this be made optional, or can the package be split as the
emacs is split into emacs and emacs-nox11?  Or is this too
much of a corner-case to justify something like that?

I have locally commented out the graphviz buildlink.  Doxygen
builds and runs just fine.

-- 
  "I probably don't know what I'm talking about."  http://www.olib.org/~rkr/