Pkgsrc kaffe and sable seem to be a little out of date, so I tried
installing kaffe or sable myself.

Basically, I got jikes and gnu classpath to compile without any
issues, but kaffe doesn't work because boehm-gc doesn't seem to
support our threading, and I can't get sablevm to find libltdl.  I'll
admit that I'm not the best at compiling, but I was wondering if
anyone else had tried this.