casa-mp-base

--- Rendering/vtkOpenGL.h.orig  2012-10-15 13:33:21.000000000 -0700

+++ Rendering/vtkOpenGL.h   2015-02-11 14:09:16.000000000 -0800

@@ -19,6 +19,7 @@

 // To prevent gl.h to include glext.h provided by the system

 #define GL_GLEXT_LEGACY

+#define GLX_GLXEXT_LEGACY

 #if defined(__APPLE__) && (defined(VTK_USE_CARBON) || defined(VTK_USE_COCOA))

 # include <OpenGL/gl.h> // Include OpenGL API.

 #else