At present frysk uses the path: .java -> .o -> .a to build its native code. This was forced by a number of problems with older java compilers mis-compiling, mis-re-building, and/or messing up errors when the more traditional .java -> .class route was taken. The .java -> .o route proved far more robust. Unfortunatly, now with Fedora 7++, the compiler is tuned more for the bulk .java->.class route so switching to that will improve the F7 build experience. On RHEL 4, just the ability to scratch build is needed.