Commits on Apr 3, 2015

1. Workaround javac popup on MacOS X …

   MacOS X does not ship with Java installed by default. Instead it
   includes binary stubs that upon execution pop up a message suggesting
   the installation of the JDK.
   
   Since `javac` is only used when `antlr4` is available, it is possible
   to work around the popup by only probing for `javac` if `antlr4` has
   been successfully detected (in which case the JDK is probably already
   installed on the system).
   
   Fixes rust-lang#23138.

   

   ranma42 committed Apr 3, 2015
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