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[This file is mirrored in both the FlightGear and SimGear packages.]
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You *must* have OpenSceneGraph (OSG) installed to build this version of





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FlightGear.





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Notice that FlightGear 2.6.0 requires at least version 3.0.0.





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You can get the latest version of OSG from:





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http://www.openscenegraph.org/





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Build notes:





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Unzip the file OpenSceneGraph-x.x.zip and install using the following





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commands:





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unzip OpenSceneGraph-x.x





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cd OpenSceneGraph





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ccmake .





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[ While running ccmake: press 'c' to configure, press 'c' once more, and





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  then press 'g' to generate and exit ]





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make





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sudo make install