[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 -- Thanks for the insight.  If the port
 uses `icu58`  for older versions of Qt, it should build properly on Mtn
 Lion etc.

 Since qmake uses pkgconfig to look for icu, it looks like the patch files
 will need to be updated.  Not as easy a fix as simply changing the
 dependencies of a port.

 In May when I have time, I will see how easy the fix will be.

-- 
Ticket URL: <https://trac.macports.org/ticket/71685#comment:5>
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