[MacPorts] #56502: gcc5 @5.5.0_1 error: expected initializer before 'API_AVAILABLE'

[MacPorts]

#56502: gcc5 @5.5.0_1 error: expected initializer before 'API_AVAILABLE'
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  Reporter:  murrayE  |      Owner:  (none)
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.4.4
Resolution:           |   Keywords:
      Port:  gcc5     |
----------------------+--------------------

Comment (by murrayE):

 What exactly do you mean by "installing a prebuilt binary" in the case of
 gcc5?

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Ticket URL: <https://trac.macports.org/ticket/56502#comment:7>
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