[MacPorts] #64353: opencv3 has undocumented dependencies

[MacPorts]

#64353: opencv3 has undocumented dependencies
-------------------------+----------------------
  Reporter:  mouse07410  |      Owner:  mascguy
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  opencv3     |
-------------------------+----------------------

Comment (by kencu):

 set this:
 {{{
 default_compilers cmacports-clang-13 macports-clang-12 clang
 }}}
 and then see what happens

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Ticket URL: <https://trac.macports.org/ticket/64353#comment:29>
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