[MacPorts] #60118: opencv and opencv4 conflict (was: OpenCV 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 ryandesign):

 But just to be clear, that is a bug. If we want to provide multiple ports
 for different versions of a software package, we should do so in such a
 way that they do not conflict.

 (The exception is -devel ports.)

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Ticket URL: <https://trac.macports.org/ticket/60118#comment:2>
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