[MacPorts] #61146: gobject-introspection does not build

[MacPorts]

#61146: gobject-introspection does not build
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  Reporter:  AgilentGCMS            |      Owner:  dbevans
      Type:  defect                 |     Status:  assigned
  Priority:  Normal                 |  Milestone:
 Component:  ports                  |    Version:
Resolution:                         |   Keywords:
      Port:  gobject-introspection  |
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Comment (by AgilentGCMS):

 I don't know how, but things are resolved now. I did a `port uninstall
 libffi`, followed by a `port install libffi`, then a `port rev-upgrade`,
 and things (including the pesky `gobject-introspection`) finally built
 without errors. This was pure luck and no strategy, though. I'm not
 looking forward to the next time clang breaks :-(

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Ticket URL: <https://trac.macports.org/ticket/61146#comment:9>
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