Github user kdunn926 commented on the issue:

    https://github.com/apache/incubator-hawq/pull/700
  
    Hey @xunzhang -
    
    1. I'm validating the build procedure right now. I'll provide it once I've 
replicated it again.
    
    2. To install in my HAWQ sandbox, I actually used a modified GPPKG from 
Greenplum's PostGIS then replaced the installed libraries with the correct ones 
compiled against HAWQ 2.0 GA release. Per my understanding of how PostGIS 
works, the parallel logic should be handled transparently as long as the 
correct libraries are in place on every segment server; similar to PL/Python, 
R, etc.
    
    3. I targeted contrib as I felt depends/thirdparty implied some HAWQ build 
dependency on PostGIS, rather than some independent functionality contributed 
to HAWQ. Ultimately, the core team should decide where it is best place. Maybe 
@changleicn has some insight here?


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