Generate documentation from source code

 Doxygen is a documentation system for C++, C, Objective-C, C#, PHP, Java,
 Python, IDL, Fortran, VHDL and to some extent D. It can generate an on-line
 documentation browser (in HTML) and/or an off-line reference manual (in LaTeX)
 from a set of annotated source files.
 .
 There is also support for generating RTF, PostScript, hyperlinked PDF,
 compressed HTML, and Unix man pages. The documentation is extracted directly
 from the sources.
 .
 Install the doxygen-latex package to build LaTeX based documents.