Index: gpac-0.4.5/src/compositor/visual_manager_3d_gl.c
===================================================================
--- gpac-0.4.5.orig/src/compositor/visual_manager_3d_gl.c	2009-09-10 09:52:37.000000000 -0400
+++ gpac-0.4.5/src/compositor/visual_manager_3d_gl.c	2009-09-10 09:58:53.000000000 -0400
@@ -70,6 +70,7 @@
 #elif defined (WIN32)
 #define GET_GLFUN(__name) (PFNGLARBMULTITEXTUREPROC) wglGetProcAddress(__name) 
 #else
+extern void (*glXGetProcAddress(const GLubyte *procname))( void );
 #define GET_GLFUN(__name) (PFNGLARBMULTITEXTUREPROC) glXGetProcAddress(__name) 
 #endif