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Compiling CSO (2.12.3) from sources
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1.  Unpack the appropriate cso source archive into a new folder
2.  Change directory to that folder
3.  Set up the file 

        scala.properties
        
    appropriately for the scala distribution you plan to use

4. Ensure that the program
   
        ant
   
   is installed.

5. ant clean jar 

There should be no warnings from a scala 2.12.3 compiler. Warnings
from a later compiler probably reflect my lagging behind the
Scalaistas in removing deprecated features from my code.

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The same instructions are valid for 2.12.4.

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