From 9e3397333278f973a11d933c27a69af250e4acf0 Mon Sep 17 00:00:00 2001
From: Anselm Kruis <a.kruis@science-computing.de>
Date: Thu, 2 Nov 2017 23:54:57 +0100
Subject: [PATCH] bpo-31890: define METH_STACKLESS (#4159)

Add METH_STACKLESS to prevent future collisions.
---
 Include/methodobject.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Include/methodobject.h b/Include/methodobject.h
index ec67dc2eb0d..66e6a554b11 100644
--- a/Include/methodobject.h
+++ b/Include/methodobject.h
@@ -89,7 +89,16 @@ PyAPI_FUNC(PyObject *) PyCFunction_NewEx(PyMethodDef *, PyObject *,
 
 #ifndef Py_LIMITED_API
 #define METH_FASTCALL  0x0080
+#endif
 
+/* This bit is preserved for Stackless Python */
+#ifdef STACKLESS
+#define METH_STACKLESS 0x0100
+#else
+#define METH_STACKLESS 0x0000
+#endif
+
+#ifndef Py_LIMITED_API
 typedef struct {
     PyObject_HEAD
     PyMethodDef *m_ml; /* Description of the C function to call */