As Rob says in http://www.kaffe.org/pipermail/kaffe/2003-July/042912.html, "for now, if you use jikes 1.18 you should pass all the regression tests. or you can use KJC but make sure you pass the -noverify flag to kaffe to get over KJC's internal error. or add KJC's jar to the bootclasspath", I would like to change test/regression/TestScript.in so that "make check" can work with KJC.