[MacPorts] #64620: gcc10 @10.3.0_1+universal fails to build on 10.13

[MacPorts]

#64620: gcc10 @10.3.0_1+universal fails to build on 10.13
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  Reporter:  JohnFHall  |      Owner:  (none)
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.7.1
Resolution:             |   Keywords:
      Port:  gcc10      |
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Comment (by cjones051073):

 Is this still an issue with the latest gcc10 version ?

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Ticket URL: <https://trac.macports.org/ticket/64620#comment:8>
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