find_package(OpenGL REQUIRED)
find_package(OpenAL REQUIRED)
find_package(ALUT REQUIRED)
-find_package(OpenSceneGraph 2.8.2 REQUIRED osgText osgSim osgDB osgParticle osgFX osgUtil osgViewer osgGA)
+find_package(OpenSceneGraph 2.8.1 REQUIRED osgText osgSim osgDB osgParticle osgFX osgUtil osgViewer osgGA)
if(ENABLE_FGADMIN)
find_package(FLTK)