note about using jikes

diff --git a/doc/README.jikes b/doc/README.jikes
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+Last update: $Date: 2002/11/28 07:47:37 $
+
+As of this writing the IBM Jikes compiler does not work with mir. Please use
+the standard Javac from your JDK. We have not yet tested Jikes V1.16 and
+V1.17. It is possible that they may work.