[MacPorts] #63679: opencv4 @4.5.4: review contrib variant, to ensure everything enabled

[MacPorts]

#63679: opencv4 @4.5.4: review contrib variant, to ensure everything enabled
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 Reporter:  mascguy  |      Owner:  mascguy
     Type:  defect   |     Status:  assigned
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:
 Keywords:  contrib  |       Port:  opencv4
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 After updating this port to the latest upstream release, it looks as if
 one or more Contrib-related components may no longer be generated.

 While it's possible that upstream has deprecated and/or removed some
 things, it's also possible that they're now simply disabled by default.
 Investigate whether any additional CMake flags are needed, to ensure
 maximal Contrib functionality.

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Ticket URL: <https://trac.macports.org/ticket/63679>
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