[MacPorts] #53040: py27-wxpython-3.0 @3.0.2.0 fatal error: 'type_traits' file not found on systems upgraded to libc++

[MacPorts]

#53040: py27-wxpython-3.0 @3.0.2.0 fatal error: 'type_traits' file not found on
systems upgraded to libc++
------------------------------+----------------------------
  Reporter:  kencu            |      Owner:  jyrkiwahlstedt
      Type:  defect           |     Status:  assigned
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:
Resolution:                   |   Keywords:
      Port:  py-wxpython-3.0  |
------------------------------+----------------------------

Comment (by kencu):

 OK. I foresee a block like the one you have in wxWidgets making it into
 this port as well, ultimately.

 For my education, can you tell me how it is that adding "-stdlib=libc++"
 to the build command allows the compiler to find the "type_traits" file? I
 know it works, but I don't understand why it works, exactly. -- K

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Ticket URL: <https://trac.macports.org/ticket/53040#comment:3>
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