warn when Ant upgrades -source for jikes

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@277150 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/compilers/Jikes.java

@@ -39,7 +39,7 @@ public class Jikes extends DefaultCompilerAdapter {
      * there is no option in jikes and I don't understand
      * what they should do.
      *
-     * It has been successfully tested with jikes >1.10
+     * It has been successfully tested with jikes >1.10
      */
     public boolean execute() throws BuildException {
         attributes.log("Using jikes compiler", Project.MSG_VERBOSE);
@@ -190,6 +190,8 @@ public class Jikes extends DefaultCompilerAdapter {
             if (source.equals("1.1") || source.equals("1.2")) {
                 // support for -source 1.1 and -source 1.2 has been
                 // added with JDK 1.4.2, Jikes doesn't like it
+                attributes.log("Jikes doesn't support '-source "
+                               + source + "', will use '-source 1.3' instead");
                 cmd.createArgument().setValue("1.3");
             } else {
                 cmd.createArgument().setValue(source);