[MacPorts] #61632: mpack: build fails under macOS 11.0.1

[MacPorts]

#61632: mpack: build fails under macOS 11.0.1
---------------------+--------------------
  Reporter:  arrigo  |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.6.4
Resolution:          |   Keywords:
      Port:  mpack   |
---------------------+--------------------
Changes (by arrigo):

 * Attachment "mpack_build_fail.log" added.

 Build log for mpack

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Ticket URL: <https://trac.macports.org/ticket/61632>
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