[MacPorts] #61442: Big Sur build fails in access.c

[MacPorts]

#61442: Big Sur build fails in access.c
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  Reporter:  ATL-Flaneur  |      Owner:  (none)
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  base         |    Version:  2.6.3
Resolution:               |   Keywords:
      Port:               |
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Comment (by ATL-Flaneur):

 Oddly, https://developer.apple.com/download/ shows an Xcode 12.3 beta but
 no Xcode 12.2 🤔

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Ticket URL: <https://trac.macports.org/ticket/61442#comment:1>
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