[MacPorts] #63643: py39-pyqt5 @5.15.5_0 build failure

[MacPorts]

#63643: py39-pyqt5 @5.15.5_0 build failure
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  Reporter:  khorton   |      Owner:  reneeotten
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.7.1
Resolution:            |   Keywords:
      Port:  py-pyqt5  |
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Changes (by khorton):

 * Attachment "main.log" added.

 build log after updating py39-sip4

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Ticket URL: <https://trac.macports.org/ticket/63643>
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