[MacPorts] #64353: opencv3 has undocumented dependencies

[MacPorts]

#64353: opencv3 has undocumented dependencies
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  Reporter:  mouse07410  |      Owner:  mascguy
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  opencv3     |
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Comment (by mascguy):

 Mouse, just to help us understand: Are you questioning which compiler
 MacPorts is choosing to build this port?

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Ticket URL: <https://trac.macports.org/ticket/64353#comment:3>
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