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OpenGL MinGW and Opengl Extension Problem

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Hi to all, i'm using minGW 5.1.4, msys 1.0.9 and on windows XP and a nvidia quadro fx 4600. I'm going to compile quicktime plugin using CMAKE, but i get the following error : O:\OpenSceneGraph-2.2.0\OpenSceneGraph\src\osgPlugins\quicktime\MovieData.cpp: In member function `void MovieData::_initImage(osg::Image*)': O:\OpenSceneGraph-2.2.0\OpenSceneGraph\src\osgPlugins\quicktime\MovieData.cpp:115: error: `GL_BGRA_EXT' was not declared in this scope mingw32-make[2]: *** [src/osgPlugins/quicktime/CMakeFiles/osgdb_qt.dir/MovieData.obj] Error 1 mingw32-make[1]: *** [src/osgPlugins/quicktime/CMakeFiles/osgdb_qt.dir/all] Error 2 mingw32-make: *** [all] Error 2 i'm looking in "myPath"\MinGW\include\GL and in gl.h and glext.h i don't find GL_BGRA_EXT. If i compile quicktime plugin using visual studio, i have no problem, so i suppose that mingw must be upgraded with new opengl files. If it is correct, how i can upgrade mingw? I have tried to get .h file from visual studio folder, but as you can imagine, it doesn't compile. Thanx

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