[MacPorts] #61632: mpack: error: multiple implicit declarations are invalid in C99 (was: mpack: build fails under macOS 11.0.1)

[MacPorts]

#61632: mpack: error: multiple implicit declarations are invalid in C99
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  Reporter:  arrigo  |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.6.4
Resolution:          |   Keywords:
      Port:  mpack   |
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Ticket URL: <https://trac.macports.org/ticket/61632#comment:1>
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