Documentation?

[WillieMaddox]

I tried making the documentation by following the instructions on the Mapserver repo. However, I got many errors,

...
Patching output file 63/63
error: problems opening map file /home/maddoxw/git/tinyows/doc/doxygen/dir_00fbcc4dbca983854442015ac670cf78_dep.map for inclusion in the docs!
If you installed Graphviz/dot after a previous failing run, 
try deleting the output directory and rerun doxygen.
lookup cache used 834/65536 hits=15641 misses=903
finished...

Are graphviz and dot a requirement for building the documentation?

I went ahead and installed them to see if it would fix the problem:

$ sudo apt-get install xdoc graphviz

Then I removed everything from the tinyows/doc directory (except for the Doxygen file) and did make doxygen again. The dependency maps are now present, so that's good, but still no "verbose" documentation. Scrolling back through the terminal I found lots of suspicious messages.
Here is a snippet:

...
unable to read file loc from[wfs_gml_display_hits]
unable to read file loc from[wfs]
Generating Sqlite3 output for file wfs_request.c
unable to read file loc from[WFS_REQUEST_UNKNOWN]
unable to read file loc from[WFS_FORMAT_UNKNOWN]
unable to read file loc from[main]
...

There were thousands of these "unable to read file loc from" messages along with the Sqlite3 messages sprinkled here and there. I have Sqlite3 installed on my system, so I'm not sure what the problem is.

Can anyone advise?

-Thanks