[MacPorts] #71668: libffi @3.4.6; Build Failure

[MacPorts]

#71668: libffi @3.4.6;  Build Failure
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  Reporter:  hardincj  |      Owner:  fhgwright
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.10.5
Resolution:            |   Keywords:
      Port:  libffi    |
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Comment (by ryandesign):

 I'm not sure. `port migrate` is a brand new subcommand that I've never
 used and I haven't read about all that it does.

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Ticket URL: <https://trac.macports.org/ticket/71668#comment:15>
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