From 558df9010915c8fe94f4d7f842e7c5aabbb06b14 Mon Sep 17 00:00:00 2001
From: Pablo Galindo <Pablogsal@gmail.com>
Date: Sat, 1 May 2021 02:21:19 +0100
Subject: [PATCH] bpo-43916: Export the _PyStructSequence_InitType to fix build
 errors in the curses module (GH-25768)

---
 Doc/data/stable_abi.dat | 1 +
 Include/structseq.h     | 4 +---
 Misc/stable_abi.txt     | 2 ++
 PC/python3dll.c         | 1 +
 4 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/Doc/data/stable_abi.dat b/Doc/data/stable_abi.dat
index 833228f7fd7..b21374a05cb 100644
--- a/Doc/data/stable_abi.dat
+++ b/Doc/data/stable_abi.dat
@@ -918,6 +918,7 @@ Py_tp_setattro
 Py_tp_str
 Py_tp_traverse
 Py_uintptr_t
+_PyStructSequence_InitType
 _frame
 _node
 allocfunc
diff --git a/Include/structseq.h b/Include/structseq.h
index af3af415b01..890e03130b4 100644
--- a/Include/structseq.h
+++ b/Include/structseq.h
@@ -27,12 +27,10 @@ PyAPI_FUNC(void) PyStructSequence_InitType(PyTypeObject *type,
 PyAPI_FUNC(int) PyStructSequence_InitType2(PyTypeObject *type,
                                            PyStructSequence_Desc *desc);
 #endif
-#ifdef Py_BUILD_CORE
-extern int _PyStructSequence_InitType(
+PyAPI_FUNC(int) _PyStructSequence_InitType(
     PyTypeObject *type,
     PyStructSequence_Desc *desc,
     unsigned long tp_flags);
-#endif
 PyAPI_FUNC(PyTypeObject*) PyStructSequence_NewType(PyStructSequence_Desc *desc);
 
 PyAPI_FUNC(PyObject *) PyStructSequence_New(PyTypeObject* type);
diff --git a/Misc/stable_abi.txt b/Misc/stable_abi.txt
index 2a802bd5f4b..d79746e0a4e 100644
--- a/Misc/stable_abi.txt
+++ b/Misc/stable_abi.txt
@@ -2121,6 +2121,8 @@ function PyObject_GetAiter
     added 3.10
 data PyExc_EncodingWarning
     added 3.10
+function _PyStructSequence_InitType
+    added 3.10
 
 # Support for Stable ABI in debug builds
 
diff --git a/PC/python3dll.c b/PC/python3dll.c
index 574d4dcad9f..30868c18646 100755
--- a/PC/python3dll.c
+++ b/PC/python3dll.c
@@ -35,6 +35,7 @@ EXPORT_FUNC(_PyObject_GC_Resize)
 EXPORT_FUNC(_PyObject_New)
 EXPORT_FUNC(_PyObject_NewVar)
 EXPORT_FUNC(_PyState_AddModule)
+EXPORT_FUNC(_PyStructSequence_InitType)
 EXPORT_FUNC(_PyThreadState_Init)
 EXPORT_FUNC(_PyThreadState_Prealloc)
 EXPORT_FUNC(_PyTrash_deposit_object)