This version of cacao only supports the `--prefix' option, even if
configure processes the other options (`--bindir', `--libdir', etc.),
-it will screw up your installation.
+it will screw up your installation since CACAO tries to setup a
+directory tree like the JVMs from Sun or IBM do.
+
+
+Requirements:
+-------------
+
+In order to build CACAO you need a Java runtime library such as GNU
+classpath or OpenJDK. Please refer to the respective project
+documentation for building.