Index: Python/sysmodule.c
===================================================================
--- Python/sysmodule.c	(revision 61467)
+++ Python/sysmodule.c	(working copy)
@@ -169,6 +169,11 @@
 static PyObject *
 sys_exc_clear(PyObject *self, PyObject *noargs)
 {
+    if(Py_Py3kWarningFlag &&
+       PyErr_Warn(PyExc_DeprecationWarning,
+              "sys.exc_clear() not supported in 3.x.  Use except statements.") < 0)
+        return NULL;
+
 	PyThreadState *tstate = PyThreadState_GET();
 	PyObject *tmp_type, *tmp_value, *tmp_tb;
 	tmp_type = tstate->exc_type;