only the following added to configure in new distfile

+if test "x$JAVAC" != "x" ; then
+  javac_version=`$JAVAC -version 2>&1 | sed -e "1s/javac //" -e "1q" `
+  echo JAVAC VERSION $javac_version
+  JAVAC="$JAVAC -source 1.4"
+fi