patch 9.1.0668: build-error with python3.12 and stable ABIv9.1.0668

Problem:  build-error with python3.12 and stable ABI (zdohnal)
Solution: Add type casts, define Py_INCREF for Python3.12 and higher
          (Ken Takata)

fixes: #15460

Signed-off-by: Ken Takata <kentkt@csc.jp>
Signed-off-by: Christian Brabandt <cb@256bit.org>

3 files changed, 52 insertions, 8 deletions

diff --git a/src/if_py_both.h b/src/if_py_both.h
index d09b14c756..3643f8be27 100644
--- a/src/if_py_both.h
+++ b/src/if_py_both.h
@@ -3083,7 +3083,7 @@ ListConcatInPlace(ListObject *self, PyObject *obj)
     }
     Py_DECREF(lookup_dict);
 
-    Py_INCREF(self);
+    Py_INCREF((PyObject *)self);
     return (PyObject *)(self);
 }
 
@@ -4012,7 +4012,7 @@ TabPageNew(tabpage_T *tab)
     if (TAB_PYTHON_REF(tab))
     {
 	self = TAB_PYTHON_REF(tab);
-	Py_INCREF(self);
+	Py_INCREF((PyObject *)self);
     }
     else
     {
@@ -4206,7 +4206,7 @@ WindowNew(win_T *win, tabpage_T *tab)
     if (WIN_PYTHON_REF(win))
     {
 	self = WIN_PYTHON_REF(win);
-	Py_INCREF(self);
+	Py_INCREF((PyObject *)self);
     }
     else
     {
@@ -4334,7 +4334,7 @@ WindowAttr(WindowObject *self, char *name)
     }
     else if (strcmp(name, "tabpage") == 0)
     {
-	Py_INCREF(self->tabObject);
+	Py_INCREF((PyObject *)self->tabObject);
 	return (PyObject *)(self->tabObject);
     }
     else if (strcmp(name, "__members__") == 0)
@@ -4488,7 +4488,7 @@ WinListNew(TabPageObject *tabObject)
 
     self = PyObject_NEW(WinListObject, WinListTypePtr);
     self->tabObject = tabObject;
-    Py_INCREF(tabObject);
+    Py_INCREF((PyObject *)tabObject);
 
     return (PyObject *)(self);
 }
@@ -5383,7 +5383,7 @@ RangeNew(buf_T *buf, PyInt start, PyInt end)
 	Py_DECREF(self);
 	return NULL;
     }
-    Py_INCREF(bufr);
+    Py_INCREF((PyObject *)bufr);
 
     self->buf = bufr;
     self->start = start;
@@ -5512,7 +5512,7 @@ BufferNew(buf_T *buf)
     if (BUF_PYTHON_REF(buf) != NULL)
     {
 	self = BUF_PYTHON_REF(buf);
-	Py_INCREF(self);
+	Py_INCREF((PyObject *)self);
     }
     else
     {
diff --git a/src/if_python3.c b/src/if_python3.c
index 96c9497712..ac817bdce4 100644
--- a/src/if_python3.c
+++ b/src/if_python3.c
@@ -219,6 +219,17 @@ static HINSTANCE hinstPy3 = 0; // Instance of python.dll
 # define PyObject_GetItem py3_PyObject_GetItem
 # define PyObject_IsTrue py3_PyObject_IsTrue
 # define PyModule_GetDict py3_PyModule_GetDict
+# if defined(USE_LIMITED_API) \
+    && (Py_LIMITED_API+0 >= 0x030c0000 || defined(Py_REF_DEBUG))
+#  undef Py_INCREF
+#  if Py_LIMITED_API+0 >= 0x030a00A7
+#   define _Py_IncRef py3__Py_IncRef
+#   define Py_INCREF _Py_IncRef
+#  else
+#   define Py_IncRef py3_Py_IncRef
+#   define Py_INCREF Py_IncRef
+#  endif
+# endif
 # ifdef USE_LIMITED_API
 #  define Py_CompileString py3_Py_CompileString
 #  define PyEval_EvalCode py3_PyEval_EvalCode
@@ -391,6 +402,15 @@ static void (*py3_Py_Finalize)(void);
 static void (*py3_PyErr_SetString)(PyObject *, const char *);
 static void (*py3_PyErr_SetObject)(PyObject *, PyObject *);
 static int (*py3_PyErr_ExceptionMatches)(PyObject *);
+# if defined(USE_LIMITED_API) \
+    && (Py_LIMITED_API+0 >= 0x030c0000 || defined(Py_REF_DEBUG))
+#  if Py_LIMITED_API+0 >= 0x030a00A7
+#   define _Py_IncRef py3__Py_IncRef
+static void (*py3__Py_IncRef)(PyObject *);
+#  else
+static void (*py3_Py_IncRef)(PyObject *);
+#  endif
+# endif
 # ifdef USE_LIMITED_API
 static PyObject* (*py3_Py_CompileString)(const char *, const char *, int);
 static PyObject* (*py3_PyEval_EvalCode)(PyObject *co, PyObject *globals, PyObject *locals);
@@ -598,6 +618,14 @@ static struct
     {"PyErr_SetString", (PYTHON_PROC*)&py3_PyErr_SetString},
     {"PyErr_SetObject", (PYTHON_PROC*)&py3_PyErr_SetObject},
     {"PyErr_ExceptionMatches", (PYTHON_PROC*)&py3_PyErr_ExceptionMatches},
+# if defined(USE_LIMITED_API) \
+    && (Py_LIMITED_API+0 >= 0x030c0000 || defined(Py_REF_DEBUG))
+#  if Py_LIMITED_API+0 >= 0x030a00A7
+    {"_Py_IncRef", (PYTHON_PROC*)&py3__Py_IncRef},
+#  else
+    {"Py_IncRef", (PYTHON_PROC*)&py3_Py_IncRef},
+#  endif
+# endif
 # ifdef USE_LIMITED_API
     {"Py_CompileString", (PYTHON_PROC*)&py3_Py_CompileString},
     {"PyEval_EvalCode", (PYTHON_PROC*)&PyEval_EvalCode},
@@ -774,6 +802,20 @@ py3__Py_XDECREF(PyObject *op)
 #  define Py_XDECREF(op) py3__Py_XDECREF(_PyObject_CAST(op))
 # endif
 
+# if defined(USE_LIMITED_API) \
+    && (Py_LIMITED_API+0 >= 0x030c0000 || defined(Py_REF_DEBUG))
+    static inline void
+py3__Py_XINCREF(PyObject *op)
+{
+    if (op != NULL)
+    {
+	Py_INCREF(op);
+    }
+}
+#  undef Py_XINCREF
+#  define Py_XINCREF(op) py3__Py_XINCREF(_PyObject_CAST(op))
+# endif
+
 # if PY_VERSION_HEX >= 0x030900b0
     static inline int
 py3_PyType_HasFeature(PyTypeObject *type, unsigned long feature)
@@ -1079,7 +1121,7 @@ static int python_end_called = FALSE;
 
 #ifdef USE_LIMITED_API
 # define DESTRUCTOR_FINISH(self) \
-    ((freefunc)PyType_GetSlot(Py_TYPE(self), Py_tp_free))((PyObject*)self)
+    ((freefunc)PyType_GetSlot(Py_TYPE((PyObject*)self), Py_tp_free))((PyObject*)self)
 #else
 # define DESTRUCTOR_FINISH(self) Py_TYPE(self)->tp_free((PyObject*)self)
 #endif
diff --git a/src/version.c b/src/version.c
index 444a1b2685..965a20dc8c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    668,
+/**/
     667,
 /**/
     666,