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 test/tools/javah/compareTest/README

 This directory contains a program for comparing the output of new javah against the

 output of JDK 6 or other older versions of javah.

 It cannot be run automatically because of the need for the older version of javah

 to compare against.

 The test works by scanning a jar file, such as rt.jar, looking for all files with

 native methods.  It then runs both the old and new versions of javah on those

 classes with native methods, and verifies that the results are character-for-character

 identical.

 To run the test, build langtools, then execute the script in the root langtools 

 directory, providing the location of the JDK to be tested. The default is

 /opt/jdk/1.6.0.