[MacPorts] #53949: qt5 @5.7.1 fails to build

[MacPorts]

#53949: qt5 @5.7.1 fails to build
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  Reporter:  1-61803  |      Owner:  MarcusCalhoun-Lopez
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  qt5      |
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Comment (by 1-61803):

 `qt5-qtmultimedia_failed_main.log` is for `clang-3.9` and `libc++`.

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Ticket URL: <https://trac.macports.org/ticket/53949#comment:2>
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