Please advise on which headers to use when building VTK-5.4.0 on OSX for glext.h and glxext.h<br><br>The default cmake settings are:<br>VTK_GLEXT_FILE:FILEPATH=<srcPath>/Utilities/ParseOGLExt/headers/glext.h<br>VTK_GLXEXT_FILE:FILEPATH=<srcPath>/Utilities/ParseOGLExt/headers/glxext.h<br>

<br>The following are possible alternatives for glext.h (similarly for glxext.h) on an OSX system (10.5.6, with Xcode 3.x, XQuartz, and macports with mesa):<br><br>Apple installations:<br>/Developer/SDKs/MacOSX10.4u.sdk/System/Library/Frameworks/OpenGL.framework/Versions/A/Headers/glext.h<br>
/Developer/SDKs/MacOSX10.4u.sdk/usr/X11R6/include/GL/glext.h<br>/Developer/SDKs/MacOSX10.5.sdk/System/Library/Frameworks/OpenGL.framework/Versions/A/Headers/glext.h<br>/Developer/SDKs/MacOSX10.5.sdk/usr/X11/include/GL/glext.h<br>
/System/Library/Frameworks/OpenGL.framework/Versions/A/Headers/glext.h<br>
<br>macports installation of mesa:<br>/opt/local/include/GL/glext.h<br><br>XQuartz installation:<br>/usr/X11/include/GL/glext.h<br><br>Thanks in advance,<br>Darren<br><br>