[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 mouse07410):

 {{{
 $ port info opencv3
 opencv3 @3.4.16_1 (graphics, science)
 Sub-ports:            py27-opencv3, py35-opencv3, py36-opencv3,
 py37-opencv3, py38-opencv3, py39-opencv3
 Variants:             avx, avx2, contrib, dc1394, debug, eigen, gdal,
 java, nonfree, opencl, openmp, openni,
                       qt4, qt5, tbb, tests, vtk

 Description:          OpenCV (Open Source Computer Vision Library) is an
 open source computer vision and
                       machine learning software library. OpenCV was built
 to provide a common infrastructure
                       for computer vision applications and to accelerate
 the use of machine perception in the
                       commercial products. Being a BSD-licensed product,
 OpenCV makes it easy for businesses
                       to utilize and modify the code.
 Homepage:             https://opencv.org

 Build Dependencies:   cmake, pkgconfig
 Library Dependencies: ffmpeg, zlib, bzip2, libpng, libjpeg-turbo,
 openjpeg, tiff, webp, ilmbase, openexr
 Conflicts with:       opencv3-devel
 Platforms:            darwin
 License:              BSD
 Maintainers:          Email: mascguy at macports.org, GitHub: mascguy
 $ port info openexr
 openexr @2.3.0_2 (graphics)
 Sub-ports:            ilmbase, py27-pyilmbase, py35-pyilmbase,
 py36-pyilmbase, py37-pyilmbase, py38-pyilmbase,
                       py39-pyilmbase, openexr_viewers

 Description:          OpenEXR is a high dynamic-range (HDR) image file
 format developed by Industrial Light &
                       Magic for use in computer imaging applications.
 Homepage:             https://www.openexr.com

 Build Dependencies:   cctools, pkgconfig
 Library Dependencies: ilmbase, zlib
 Platforms:            darwin
 License:              BSD
 Maintainers:          Email: mcalhoun at macports.org, GitHub: MarcusCalhoun-
 Lopez
                       Policy: openmaintainer
 $ port deps opencv3
 Full Name: opencv3 @3.4.16_1
 Build Dependencies:   cmake, pkgconfig
 Library Dependencies: ffmpeg, zlib, bzip2, libpng, libjpeg-turbo,
 openjpeg, tiff, webp, ilmbase, openexr
 $ port deps openexr
 Full Name: openexr @2.3.0_2
 Build Dependencies:   cctools, pkgconfig
 Library Dependencies: ilmbase, zlib
 $
 }}}

 For really inquisitive, I'm attaching output of {{{port rdeps opencv3}}}.
 There's no mentioning of Clang either.

-- 
Ticket URL: <https://trac.macports.org/ticket/64353#comment:6>
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