Before running Kaffe you need to configure the environment.  This
requires setting CLASSPATH, KAFFEHOME and LD_LIBRARY_PATH.  For a
standard installation these should be defined as follows:

 CLASSPATH=.:/usr/local/share/kaffe/Klasses.jar:\
     /usr/local/share/kaffe/pizza.jar
 KAFFEHOME=/usr/local/share/kaffe
 LD_LIBRARY_PATH=/usr/lib:/usr/local/lib

You can run "sh /usr/local/share/kaffe/ENVIRONMENT" to have these set for
you.

The README included in the distribution distfile contains a more detailed
explanation, if necessary.
