[MacPorts] #63994: Failure to build on Big Sur

[MacPorts]

#63994: Failure to build on Big Sur
------------------------------+--------------------------
  Reporter:  davehun          |      Owner:  (none)
      Type:  defect           |     Status:  new
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.7.1
Resolution:                   |   Keywords:  bigsur arm64
      Port:  emacs-app-devel  |
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Changes (by davehun):

 * Attachment "config.log" added.

 config.log

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Ticket URL: <https://trac.macports.org/ticket/63994>
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