[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@…):

 Thanks.  If I get a chance I will also try to go through the log to see if
 I can find anything specific.
 OSG is used by OpenModelica.  This port is not hosted by Macports, but
 instead on their own servers.  But, then it uses Macports to build and
 install.
 [https://openmodelica.org/download/download-mac]

 Specifically the +modelica3d variant requires OSG.

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Ticket URL: <https://trac.macports.org/ticket/50659#comment:18>
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