[MacPorts] #60118: opencv and opencv4 conflict

[MacPorts]

#60118: opencv and opencv4 conflict
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  Reporter:  dynect          |      Owner:  (none)
      Type:  defect          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:
Resolution:                  |   Keywords:
      Port:  opencv opencv4  |
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Comment (by mascguy):

 Andrew, since I have a need for opencv4, I'm willing to take on this work.
 Let me know if that's okay with you.

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Ticket URL: <https://trac.macports.org/ticket/60118#comment:8>
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