[MacPorts] #50659: OpenSceneGraph upgrade to 3.4.0 fails on El Capitan

[MacPorts]

#50659: OpenSceneGraph upgrade to 3.4.0 fails on El Capitan
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  Reporter:  dersh@…         |      Owner:  macports-tickets@…
      Type:  defect          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:
Resolution:                  |   Keywords:  elcapitan
      Port:  OpenSceneGraph  |
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Comment (by dersh@…):

 OSG is a dependency for me.  So, I have never really dealt with it
 directly at all.  It was something that worked, and now is something that
 breaks other things.
 I am on Xcode 7.2.1.

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Ticket URL: <https://trac.macports.org/ticket/50659#comment:9>
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