bpo-31890: define METH_STACKLESS (#4159)

Add METH_STACKLESS to prevent future collisions.

diff --git a/Include/methodobject.h b/Include/methodobject.h
index ec67dc2eb0d59d7e441e637abd2382cf8fee857e..66e6a554b114160765affe8bc17a9baf6628546f 100644 (file)
--- 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 */