[MacPorts] #56004: audacity @2.2.0: error: unknown type name 'unique_ptr'

[MacPorts]

#56004: audacity @2.2.0: error: unknown type name 'unique_ptr'
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  Reporter:  ryandesign  |      Owner:  RJVB
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  audacity    |
-------------------------+------------------

Comment (by chrstphrchvz):

 This issue was probably resolved as of [3051359ae8/macports-ports] when
 the `cxx11 1.1` portgroup was added to the port.

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Ticket URL: <https://trac.macports.org/ticket/56004#comment:2>
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