[MacPorts] #55641: zmq @4.2.3 fails to build on 10.7 and 10.8 due to C++11

[MacPorts]

#55641: zmq @4.2.3 fails to build on 10.7 and 10.8 due to C++11
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  Reporter:  ryandesign      |      Owner:  merijn
      Type:  defect          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.4.2
Resolution:                  |   Keywords:  lion, mountainlion
      Port:  zmq, zmq-devel  |
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Comment (by michaelld):

 Ah OK I understand. Maybe there's an option to disable C++11 entirely that
 we can set? Why use it if it's optional & would result in "different"
 builds depending on the selected compiler?

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Ticket URL: <https://trac.macports.org/ticket/55641#comment:3>
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