[MacPorts] #47256: OpenCV variants are not getting installed

[MacPorts]

#47256: OpenCV variants are not getting installed
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  Reporter:  animesh.lovelyworld@…  |      Owner:  stromnov@…
      Type:  defect                 |     Status:  new
  Priority:  Normal                 |  Milestone:
 Component:  ports                  |    Version:  2.3.3
Resolution:                         |   Keywords:
      Port:  opencv                 |
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Comment (by larryv@…):

 The `cmake-1.0` portgroup was updated in r134128 to support out-of-source
 builds via a `cmake.out_of_source` option. We tried to maintain backwards
 compatibility with portfiles that already set up out-of-source builds, but
 `opencv` does that in an unorthodox way that we didn’t account for.

 Here’s a [[attachment:opencv-OOS.patch|patch]] that should fix the build.

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Ticket URL: <https://trac.macports.org/ticket/47256#comment:4>
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