The build process for the log4cxx web site and API documentation was not unified with the rest of the build process. Site documentation was apparently generated using xdocs/build.xml and API documentation either by manual invocation of doxygen or the autotools build.
The associated changes makes the build process similar to log4j's. The site build process requires velocity-1.4 and jdom-b8 (also required by log4j's site build).
To build the documentation:
ant site -Dvelocity.jar=FILESPEC -Djdom.dir=FILESPEC
To deploy documentation:
ant deploy-site -Dvelocity.jar=FILESPEC -Djdom.dir=FILESPEC -Dapache.user=USERNAME