[MacPorts] #55165: harfbuzz 1.6.1 : cc1plus: error: unrecognized command line option "-std=c++11"

[MacPorts]

#55165: harfbuzz 1.6.1 : cc1plus: error: unrecognized command line option
"-std=c++11"
-----------------------+------------------------
  Reporter:  kencu     |      Owner:  ryandesign
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:  haspatch
      Port:  harfbuzz  |
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Comment (by MarcusCalhoun-Lopez):

 As noted in the original post, {{{PortGroup cxx11 1.1}}} solves the
 problem for all systems.[[BR]]
 harfbuzz seems to go out of its way to minimize the parts of C++11 it
 uses.[[BR]]
 If affecting the smallest number of systems is desirable (Xcode 4 systems
 for example), the attached does that.

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Ticket URL: <https://trac.macports.org/ticket/55165#comment:5>
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