[MacPorts] #71685: qt57-qtbase @5.7.1_15 -- Fails to Configure on Mtn Lion -- "fatal error: 'string_view' file not found"

[MacPorts]

#71685: qt57-qtbase @5.7.1_15 -- Fails to Configure on Mtn Lion -- "fatal error:
'string_view' file not found"
-------------------------+--------------------------
  Reporter:  RobK88      |      Owner:  (none)
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.10.5
Resolution:              |   Keywords:  mountainlion
      Port:  qt5-qtbase  |
-------------------------+--------------------------

Comment (by RobK88):

 @aeiouaeiouaeiouaeiouaeiouaeiou -- No.  I still cannot build `qt57-qtbase`
 on Mtn Lion.  Pity..

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Ticket URL: <https://trac.macports.org/ticket/71685#comment:8>
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