It looks like gcj does not understand '-sourcepath' option. I tried changing the build dependency to default-jdk but there are other problems with debian/rules file which still cause problem.
Upstream now contains a ant build script which does the heavy lifting of the build process. I guess maintainer did not notice this ant script. I am working on using this script for build. I will submit a patch in a day or two. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org