[MacPorts] #64688: qt5-qtwebengine-gn fails to configure on OSX 10.13.6, macports 2.7.1

[MacPorts]

#64688: qt5-qtwebengine-gn fails to configure on OSX 10.13.6, macports 2.7.1
---------------------------------+-------------------------------
  Reporter:  rufty               |      Owner:  (none)
      Type:  defect              |     Status:  new
  Priority:  Normal              |  Milestone:
 Component:  ports               |    Version:  2.7.1
Resolution:                      |   Keywords:  Configure failure
      Port:  qt5-qtwebengine-gn  |
---------------------------------+-------------------------------
Changes (by rufty):

 * Attachment "main.log" added.


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Ticket URL: <https://trac.macports.org/ticket/64688>
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