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

-- 
Ticket URL: <https://trac.macports.org/ticket/71685#comment:2>
MacPorts <https://www.macports.org/>
Ports system for macOS