[MacPorts] #57704: zmq, zmq-devel: Fix C++11 detection issues

[MacPorts]

#57704: zmq, zmq-devel: Fix C++11 detection issues
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  Reporter:  ryandesign      |      Owner:  stromnov
      Type:  defect          |     Status:  assigned
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:
Resolution:                  |   Keywords:
      Port:  zmq, zmq-devel  |
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Comment (by michaelld):

 You are correct: the ZMQ folks added in a check for C++11; actually
 gnu++11. Which seems to override my patch's flag to disable it. Let me see
 what I can do here ...

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Ticket URL: <https://trac.macports.org/ticket/57704#comment:3>
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