[MacPorts] #61284: python39 fails build on ARM64

[MacPorts]

#61284: python39 fails build on ARM64
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  Reporter:  michaelld  |      Owner:  jmroot
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:  arm64
      Port:  python39   |
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Comment (by jpanetta):

 With the commits merged earlier today, the 3.9 branch now builds on ARM64!

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Ticket URL: <https://trac.macports.org/ticket/61284#comment:8>
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