Define GLX_SAMPLE_BUFFERS_ARB and GLX_SAMPLES_ARB if they were not
defined by the OpenGL headers.
diff --git a/dlls/opengl32/opengl_ext.h b/dlls/opengl32/opengl_ext.h
index 90722e5..eaf9359 100644
--- a/dlls/opengl32/opengl_ext.h
+++ b/dlls/opengl32/opengl_ext.h
@@ -40,6 +40,14 @@
#define WINAPI __stdcall
#define APIENTRY WINAPI
+/* For compatibility with old Mesa headers */
+#ifndef GLX_SAMPLE_BUFFERS_ARB
+# define GLX_SAMPLE_BUFFERS_ARB 100000
+#endif
+#ifndef GLX_SAMPLES_ARB
+# define GLX_SAMPLES_ARB 100001
+#endif
+
/* X11 locking */
extern void (*wine_tsx11_lock_ptr)(void);