Happy to report that I've built the java tools. Frase nailed it. QPID_HOME was set wrong. I had it set at the top level qpid directory instead of src/java/build. So all I needed to build was to set:
QPID_HOME=/home/davin/external/qpid/src/java/build CLASSPATH=/home/davin/external/qpid/src/java/build/lib/qpid-all.jar Then pop into the tools/src/java directory and run 'ant all'. Thanks!