Add pep-291 compatibility markers.
diff --git a/Lib/ctypes/__init__.py b/Lib/ctypes/__init__.py
index 042bc47..eb47532 100644
--- a/Lib/ctypes/__init__.py
+++ b/Lib/ctypes/__init__.py
@@ -1,3 +1,6 @@
+######################################################################
+# This file should be kept compatible with Python 2.3, see PEP 291. #
+######################################################################
"""create and manipulate C data types in Python"""
import os as _os, sys as _sys
diff --git a/Lib/ctypes/_endian.py b/Lib/ctypes/_endian.py
index 5818ae1..6de0d47 100644
--- a/Lib/ctypes/_endian.py
+++ b/Lib/ctypes/_endian.py
@@ -1,3 +1,6 @@
+######################################################################
+# This file should be kept compatible with Python 2.3, see PEP 291. #
+######################################################################
import sys
from ctypes import *
diff --git a/Lib/ctypes/macholib/__init__.py b/Lib/ctypes/macholib/__init__.py
index 5621def..36149d2 100644
--- a/Lib/ctypes/macholib/__init__.py
+++ b/Lib/ctypes/macholib/__init__.py
@@ -1,3 +1,6 @@
+######################################################################
+# This file should be kept compatible with Python 2.3, see PEP 291. #
+######################################################################
"""
Enough Mach-O to make your head spin.
diff --git a/Lib/ctypes/macholib/dyld.py b/Lib/ctypes/macholib/dyld.py
index a336fd0..14e2139 100644
--- a/Lib/ctypes/macholib/dyld.py
+++ b/Lib/ctypes/macholib/dyld.py
@@ -1,3 +1,6 @@
+######################################################################
+# This file should be kept compatible with Python 2.3, see PEP 291. #
+######################################################################
"""
dyld emulation
"""
diff --git a/Lib/ctypes/macholib/dylib.py b/Lib/ctypes/macholib/dylib.py
index aa10750..ea3dd38 100644
--- a/Lib/ctypes/macholib/dylib.py
+++ b/Lib/ctypes/macholib/dylib.py
@@ -1,3 +1,6 @@
+######################################################################
+# This file should be kept compatible with Python 2.3, see PEP 291. #
+######################################################################
"""
Generic dylib path manipulation
"""
diff --git a/Lib/ctypes/macholib/framework.py b/Lib/ctypes/macholib/framework.py
index ad6ed55..dd7fb2f 100644
--- a/Lib/ctypes/macholib/framework.py
+++ b/Lib/ctypes/macholib/framework.py
@@ -1,3 +1,6 @@
+######################################################################
+# This file should be kept compatible with Python 2.3, see PEP 291. #
+######################################################################
"""
Generic framework path manipulation
"""
diff --git a/Lib/ctypes/util.py b/Lib/ctypes/util.py
index 094b029..d4e314a 100644
--- a/Lib/ctypes/util.py
+++ b/Lib/ctypes/util.py
@@ -1,3 +1,6 @@
+######################################################################
+# This file should be kept compatible with Python 2.3, see PEP 291. #
+######################################################################
import sys, os
# find_library(name) returns the pathname of a library, or None.
diff --git a/Lib/ctypes/wintypes.py b/Lib/ctypes/wintypes.py
index 92b79d2..870d917 100644
--- a/Lib/ctypes/wintypes.py
+++ b/Lib/ctypes/wintypes.py
@@ -1,3 +1,6 @@
+######################################################################
+# This file should be kept compatible with Python 2.3, see PEP 291. #
+######################################################################
# XXX This module needs cleanup.
from ctypes import *
diff --git a/Modules/_ctypes/_ctypes.c b/Modules/_ctypes/_ctypes.c
index 5d29cda..4b07591 100644
--- a/Modules/_ctypes/_ctypes.c
+++ b/Modules/_ctypes/_ctypes.c
@@ -1,3 +1,8 @@
+/*****************************************************************
+ This file should be kept compatible with Python 2.3, see PEP 291.
+ *****************************************************************/
+
+
/*
ToDo:
diff --git a/Modules/_ctypes/_ctypes_test.c b/Modules/_ctypes/_ctypes_test.c
index b10d6fe..99cc7a9 100644
--- a/Modules/_ctypes/_ctypes_test.c
+++ b/Modules/_ctypes/_ctypes_test.c
@@ -1,3 +1,8 @@
+/*****************************************************************
+ This file should be kept compatible with Python 2.3, see PEP 291.
+ *****************************************************************/
+
+
#include <Python.h>
/*
diff --git a/Modules/_ctypes/callbacks.c b/Modules/_ctypes/callbacks.c
index 4baf3aa..b4f09e0 100644
--- a/Modules/_ctypes/callbacks.c
+++ b/Modules/_ctypes/callbacks.c
@@ -1,3 +1,7 @@
+/*****************************************************************
+ This file should be kept compatible with Python 2.3, see PEP 291.
+ *****************************************************************/
+
#include "Python.h"
#include "compile.h" /* required only for 2.3, as it seems */
#include "frameobject.h"
diff --git a/Modules/_ctypes/callproc.c b/Modules/_ctypes/callproc.c
index c4942a0..c229106 100644
--- a/Modules/_ctypes/callproc.c
+++ b/Modules/_ctypes/callproc.c
@@ -1,3 +1,8 @@
+/*****************************************************************
+ This file should be kept compatible with Python 2.3, see PEP 291.
+ *****************************************************************/
+
+
/*
* History: First version dated from 3/97, derived from my SCMLIB version
* for win16.
diff --git a/Modules/_ctypes/cfield.c b/Modules/_ctypes/cfield.c
index ae0290f..68fac67 100644
--- a/Modules/_ctypes/cfield.c
+++ b/Modules/_ctypes/cfield.c
@@ -1,3 +1,7 @@
+/*****************************************************************
+ This file should be kept compatible with Python 2.3, see PEP 291.
+ *****************************************************************/
+
#include "Python.h"
#include <ffi.h>
diff --git a/Modules/_ctypes/ctypes.h b/Modules/_ctypes/ctypes.h
index e82ff0d..6db7015 100644
--- a/Modules/_ctypes/ctypes.h
+++ b/Modules/_ctypes/ctypes.h
@@ -1,4 +1,6 @@
-/******************************************************************/
+/*****************************************************************
+ This file should be kept compatible with Python 2.3, see PEP 291.
+ *****************************************************************/
#if (PY_VERSION_HEX < 0x02050000)
typedef int Py_ssize_t;
diff --git a/Modules/_ctypes/ctypes_dlfcn.h b/Modules/_ctypes/ctypes_dlfcn.h
index 7f632c5..d8bf904 100644
--- a/Modules/_ctypes/ctypes_dlfcn.h
+++ b/Modules/_ctypes/ctypes_dlfcn.h
@@ -1,4 +1,6 @@
-/******************************************************************/
+/*****************************************************************
+ This file should be kept compatible with Python 2.3, see PEP 291.
+ *****************************************************************/
#ifndef _CTYPES_DLFCN_H_
#define _CTYPES_DLFCN_H_
diff --git a/Modules/_ctypes/malloc_closure.c b/Modules/_ctypes/malloc_closure.c
index 29e9f4c..4cd5dd6 100644
--- a/Modules/_ctypes/malloc_closure.c
+++ b/Modules/_ctypes/malloc_closure.c
@@ -1,3 +1,7 @@
+/*****************************************************************
+ This file should be kept compatible with Python 2.3, see PEP 291.
+ *****************************************************************/
+
#include <Python.h>
#include <ffi.h>
#ifdef MS_WIN32
diff --git a/Modules/_ctypes/stgdict.c b/Modules/_ctypes/stgdict.c
index 2e7e157..1ddbf85 100644
--- a/Modules/_ctypes/stgdict.c
+++ b/Modules/_ctypes/stgdict.c
@@ -1,3 +1,7 @@
+/*****************************************************************
+ This file should be kept compatible with Python 2.3, see PEP 291.
+ *****************************************************************/
+
#include "Python.h"
#include <ffi.h>
#ifdef MS_WIN32