[MacPorts] #71618: qt5-qtbase @5.15.15_2 does not build on macOS High Sierra, version 10.13.6, because of ld error (and cryptic warnings?)

[MacPorts]

#71618: qt5-qtbase @5.15.15_2 does not build on macOS High Sierra, version 10.13.6,
because of ld error (and cryptic warnings?)
-------------------------+---------------------------------
  Reporter:  ballapete   |      Owner:  MarcusCalhoun-Lopez
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.10.5
Resolution:              |   Keywords:  highsierra
      Port:  qt5-qtbase  |
-------------------------+---------------------------------

Comment (by kencu):

 probable fix:

 https://github.com/macports/macports-ports/pull/25514

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Ticket URL: <https://trac.macports.org/ticket/71618#comment:3>
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