[MacPorts] #62208: py-grpcio: error: invalid argument '-std=c++11' not allowed with 'C'

[MacPorts]

#62208: py-grpcio: error: invalid argument '-std=c++11' not allowed with 'C'
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  Reporter:  ryandesign  |      Owner:  emcrisostomo
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  py-grpcio   |
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Comment (by jmroot):

 Might be able to work around it by adding `-xc++` to the flags.

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Ticket URL: <https://trac.macports.org/ticket/62208#comment:1>
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