[MacPorts] #57263: clang-6.0 does not build on Mojave

[MacPorts]

#57263: clang-6.0 does not build on Mojave
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  Reporter:  eesatfan                     |      Owner:  (none)
      Type:  defect                       |     Status:  new
  Priority:  Normal                       |  Milestone:
 Component:  ports                        |    Version:  2.5.4
Resolution:                               |   Keywords:
      Port:  clang-6.0 dependency of qt5  |
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Changes (by eesatfan):

 * Attachment "main.log" added.

 Log of build

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Ticket URL: <https://trac.macports.org/ticket/57263>
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