Possible arguments: (none),
      ,
      X.Y,
      X.Y+,
      X.Y-X.Y-Z.A
Provide support for PostgreSQL.
      Port maintainer can set version required.
      Minimum and maximum versions or a range can be specified; for
      example, 9.0-, 8.4+,
      8.4-9.2.
By default, the added dependency will be the client, but if
      the port requires additional components, this can be done using
      WANT_PGSQL=;
      for example,
      component[:target]WANT_PGSQL=server:configure pltcl plperl.
      The available components are:
client
contrib
docs
pgtcl
plperl
plpython
pltcl
server
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