[MacPorts] #57234: Some ports are failing to build due to new build system in Xcode 10

[MacPorts]

#57234: Some ports are failing to build due to new build system in Xcode 10
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  Reporter:  mf2k                                |      Owner:  (none)
      Type:  defect                              |     Status:  new
  Priority:  Normal                              |  Milestone:
 Component:  ports                               |    Version:
Resolution:                                      |   Keywords:  xcode10
      Port:  cotvnc macports-notifier pinentry-  |
  mac terminal-notifier xhyve                    |
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Comment (by kencu):

 I would worry that using the new build system for the build and then the
 old build system for the destroot might truly be leading into totally
 unknown territory.

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Ticket URL: <https://trac.macports.org/ticket/57234#comment:10>
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