[MacPorts] #38430: opencv: error: dispatch/dispatch.h: No such file or directory

[MacPorts]

#38430: opencv: error: dispatch/dispatch.h: No such file or directory
---------------------------+------------------------
  Reporter:  amontinari@…  |      Owner:  stromnov@…
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.1.3
Resolution:                |   Keywords:
      Port:  opencv        |
---------------------------+------------------------

Comment (by stromnov@…):

 You can try this:
 https://github.com/stromnov/mports/commit/81d7f4b34087d19b949ff4d16bca7bb709a35661
 (with GCD patch), or just rebuild with +tbb variant.

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Ticket URL: <https://trac.macports.org/ticket/38430#comment:7>
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