[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 mascguy):

 Replying to [comment:10 jmroot]:
 > The dependencies seem to be reported correctly here.
 > {{{
 > % port deps opencv3 +avx2+contrib+java+nonfree+opencl+openmp+qt5+vtk
 > Full Name: opencv3
 @3.4.16_1+avx2+contrib+java+nonfree+opencl+openmp+qt5+vtk
 > Build Dependencies:   cmake, pkgconfig, apache-ant, clang-9.0
 > Library Dependencies: ffmpeg, zlib, bzip2, libpng, libjpeg-turbo,
 openjpeg,
 >                       tiff, webp, ilmbase, openexr, vtk, gflags, google-
 glog,
 >                       ceres-solver, libomp, qt5-qtbase, openjdk11
 > }}}

 Yep! While I haven't been able to dig into this further - my day job
 commitments have been extra-intensive this week - my guess is that variant
 `openmp` is driving the dependency on Clang 9.

 And that ​seems both reasonable, and correct. Though I'll defer to Josh
 and others, to confirm.

-- 
Ticket URL: <https://trac.macports.org/ticket/64353#comment:11>
MacPorts <https://www.macports.org/>
Ports system for macOS