[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 mouse07410):

 > that's because you've installed opencv3 with non-default variants but
 are asking only for the dependencies of the port with its default variants

 Excellent point! I did not know that :-(. Thanks!

 > The opencv3 port doesn't make the decision of which specific compiler to
 use, it just asks for C++11 and openmp 4.0 support and base chooses a
 compiler that meets those requirements.

 Understood. But in that case, why didn't it use already-installed Macports
 clang-11 or (better yet) clang-13?

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Ticket URL: <https://trac.macports.org/ticket/64353#comment:15>
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