[MacPorts] #62462: opencv4 upgrade fails

[MacPorts]

#62462: opencv4 upgrade fails
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  Reporter:  dershow  |      Owner:  stromnov
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  opencv4  |
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Comment (by mascguy):

 Maintainers: This problem will be eliminated once all dependent ports have
 been migrated from `opencv` to `opencv3`. The latter is fully isolated, to
 avoid possible clashes like this.

 But if we want to fix this ASAP, it might be possible to do so via one or
 more CMake arguments. Haven't looked yet, but my guess is that it might be
 possible...

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Ticket URL: <https://trac.macports.org/ticket/62462#comment:4>
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