[MacPorts] #63506: python38 @3.8.12_1 +optimizations does not build on macOS 11.5.2

[MacPorts]

#63506: python38 @3.8.12_1 +optimizations does not build on macOS 11.5.2
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  Reporter:  ballapete  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.7.1
Resolution:             |   Keywords:  bigsur
      Port:  python38   |
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Comment (by jmroot):

 Given that you're building against the 11.0 SDK you might need to update
 your command line tools.

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Ticket URL: <https://trac.macports.org/ticket/63506#comment:2>
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