just a comment for check_compatible()
diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c
index 05b8c57..94319ff 100644
--- a/src/mesa/main/context.c
+++ b/src/mesa/main/context.c
@@ -1495,6 +1495,11 @@
/**
* Check if the given context can render into the given framebuffer
* by checking visual attributes.
+ *
+ * XXX this may go away someday because we're moving toward more freedom
+ * in binding contexts to drawables with different visual attributes.
+ * The GL_EXT_f_b_o extension is prompting some of that.
+ *
* \return GL_TRUE if compatible, GL_FALSE otherwise.
*/
static GLboolean