[MacPorts] #67815: libarchive @3.7.0 fails to build on 10.12 and older

[MacPorts]

#67815: libarchive @3.7.0 fails to build on 10.12 and older
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  Reporter:  jmroot      |      Owner:  tobypeterson
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  libarchive  |
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Comment (by jmroot):

 https://github.com/libarchive/libarchive/commit/b55d25506ad63667e394a31bee91b494ad891ceb

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Ticket URL: <https://trac.macports.org/ticket/67815#comment:1>
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