[MacPorts] #59233: postgis2 fails to compile on Mojave with Xcode 11.1

[MacPorts]

#59233: postgis2 fails to compile on Mojave with Xcode 11.1
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  Reporter:  EJFielding  |      Owner:  Veence
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.6.1
Resolution:              |   Keywords:
      Port:  postgis2    |
-------------------------+----------------------

Comment (by EJFielding):

 I forget now why I had `postgis2` installed more than a year ago when I
 reported it, but I uninstalled it and did not need it again.

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Ticket URL: <https://trac.macports.org/ticket/59233#comment:7>
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