[MacPorts] #64563: MyPaint @2.0.1: fatal error: 'future' file not found on 10.7/10.8

[MacPorts]

#64563: MyPaint @2.0.1: fatal error: 'future' file not found on 10.7/10.8
-------------------------+-------------------------------
  Reporter:  evanmiller  |      Owner:  ryandesign
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.7.1
Resolution:              |   Keywords:  lion mountainlion
      Port:  MyPaint     |
-------------------------+-------------------------------

Comment (by jmroot):

 `<future>` is a C++11 thing, so the port probably needs to set
 compiler.cxx_standard accordingly. It's also building C++ code using
 `configure.cc` and seems to be ignoring CXXFLAGS, so it may also need the
 workaround used by e.g. py-re2 in order to use the right stdlib.

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Ticket URL: <https://trac.macports.org/ticket/64563#comment:1>
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