Github user fmcquillan99 commented on the issue:

    https://github.com/apache/incubator-madlib/pull/123
  
    In file ReadMe_Build.txt the lines 38-40 should be updated from
    
     + PostgreSQL 9.2, 9.3, 9.4
      + HAWQ 1.2, 1.3
      + Greenplum 4.2, 4.3
    
    to 
    
      + PostgreSQL 9.5, 9.6
      + HAWQ 2.x
      + Greenplum 4.3.x, 5.x


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