Patched to compile on older GLX headers.
--- a/src/video/x11/SDL_x11opengl.c Mon Jul 18 14:34:19 2011 -0700
+++ b/src/video/x11/SDL_x11opengl.c Mon Jul 18 14:55:24 2011 -0700
@@ -64,6 +64,11 @@
#define GLX_CONTEXT_DEBUG_BIT_ARB 0x0001
#define GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x0002
+#ifndef GLX_EXT_swap_control
+#define GLX_SWAP_INTERVAL_EXT 0x20F1
+#define GLX_MAX_SWAP_INTERVAL_EXT 0x20F2
+#endif
+
/* Typedef for the GL 3.0 context creation function */
typedef GLXContext(*PFNGLXCREATECONTEXTATTRIBSARBPROC) (Display * dpy,
GLXFBConfig config,