gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)

Rename from _Py_INTERNAL_ABI_SLOT to _Py_ABI_SLOT
and define the macro using _PyABIInfo_DEFAULT.

Use the ABI slot in stdlib extension modules to enable running
a check of ABI version compatibility.

_tkinter, _tracemalloc and readline don't use the slots, hence they need
explicit handling.

Co-authored-by: Victor Stinner <vstinner@python.org>

Author: befeleme

Include/cpython/modsupport.h

@@ -39,13 +39,7 @@ PyAPI_FUNC(int) _PyArg_ParseTupleAndKeywordsFast(PyObject *, PyObject *,
                                                  struct _PyArg_Parser *, ...);
 
 #ifdef Py_BUILD_CORE
-// Internal; defined here to avoid explicitly including pycore_modsupport.h
-#define _Py_INTERNAL_ABI_SLOT                             \
-    {Py_mod_abi, (void*) &(PyABIInfo) {                   \
-        .abiinfo_major_version = 1,                       \
-        .abiinfo_minor_version = 0,                       \
-        .flags = PyABIInfo_INTERNAL,                      \
-        .build_version = PY_VERSION_HEX,                  \
-        .abi_version = PY_VERSION_HEX }}                  \
-    ///////////////////////////////////////////////////////
+// For internal use in stdlib. Needs C99 compound literals.
+// Defined here to avoid every stdlib module including pycore_modsupport.h
+#define _Py_ABI_SLOT {Py_mod_abi, (void*) &(PyABIInfo) _PyABIInfo_DEFAULT}
 #endif

Modules/_abc.c

@@ -976,6 +976,7 @@ _abcmodule_free(void *module)
 }
 
 static PyModuleDef_Slot _abcmodule_slots[] = {
+    _Py_ABI_SLOT,
     {Py_mod_exec, _abcmodule_exec},
     {Py_mod_multiple_interpreters, Py_MOD_PER_INTERPRETER_GIL_SUPPORTED},
     {Py_mod_gil, Py_MOD_GIL_NOT_USED},

Modules/_asynciomodule.c

@@ -4394,6 +4394,7 @@ module_exec(PyObject *mod)
 }
 
 static struct PyModuleDef_Slot module_slots[] = {
+    _Py_ABI_SLOT,
     {Py_mod_exec, module_exec},
     {Py_mod_multiple_interpreters, Py_MOD_PER_INTERPRETER_GIL_SUPPORTED},
     {Py_mod_gil, Py_MOD_GIL_NOT_USED},

Modules/_bisectmodule.c

@@ -452,6 +452,7 @@ bisect_modexec(PyObject *m)
 }
 
 static PyModuleDef_Slot bisect_slots[] = {
+    _Py_ABI_SLOT,
     {Py_mod_exec, bisect_modexec},
     {Py_mod_multiple_interpreters, Py_MOD_PER_INTERPRETER_GIL_SUPPORTED},
     {Py_mod_gil, Py_MOD_GIL_NOT_USED},

Modules/_bz2module.c

@@ -783,6 +783,7 @@ _bz2_free(void *module)
 }
 
 static struct PyModuleDef_Slot _bz2_slots[] = {
+    _Py_ABI_SLOT,
     {Py_mod_exec, _bz2_exec},
     {Py_mod_multiple_interpreters, Py_MOD_PER_INTERPRETER_GIL_SUPPORTED},
     {Py_mod_gil, Py_MOD_GIL_NOT_USED},

Modules/_codecsmodule.c

@@ -1113,6 +1113,7 @@ static PyMethodDef _codecs_functions[] = {
 };
 
 static PyModuleDef_Slot _codecs_slots[] = {
+    _Py_ABI_SLOT,
     {Py_mod_multiple_interpreters, Py_MOD_PER_INTERPRETER_GIL_SUPPORTED},
     {Py_mod_gil, Py_MOD_GIL_NOT_USED},
     {0, NULL}

Modules/_collectionsmodule.c

@@ -2873,6 +2873,7 @@ collections_exec(PyObject *module) {
 #undef ADD_TYPE
 
 static struct PyModuleDef_Slot collections_slots[] = {
+    _Py_ABI_SLOT,
     {Py_mod_exec, collections_exec},
     {Py_mod_multiple_interpreters, Py_MOD_PER_INTERPRETER_GIL_SUPPORTED},
     {Py_mod_gil, Py_MOD_GIL_NOT_USED},

Modules/_csv.c

@@ -1833,6 +1833,7 @@ csv_exec(PyObject *module) {
 }
 
 static PyModuleDef_Slot csv_slots[] = {
+    _Py_ABI_SLOT,
     {Py_mod_exec, csv_exec},
     {Py_mod_multiple_interpreters, Py_MOD_PER_INTERPRETER_GIL_SUPPORTED},
     {Py_mod_gil, Py_MOD_GIL_NOT_USED},

Modules/_ctypes/_ctypes.c

@@ -6497,6 +6497,7 @@ module_free(void *module)
 }
 
 static PyModuleDef_Slot module_slots[] = {
+    _Py_ABI_SLOT,
     {Py_mod_exec, _ctypes_mod_exec},
     {Py_mod_multiple_interpreters, Py_MOD_PER_INTERPRETER_GIL_SUPPORTED},
     {Py_mod_gil, Py_MOD_GIL_NOT_USED},

Modules/_curses_panel.c

@@ -845,6 +845,7 @@ _curses_panel_exec(PyObject *mod)
 }
 
 static PyModuleDef_Slot _curses_slots[] = {
+    _Py_ABI_SLOT,
     {Py_mod_exec, _curses_panel_exec},
     // XXX gh-103092: fix isolation.
     {Py_mod_multiple_interpreters, Py_MOD_MULTIPLE_INTERPRETERS_NOT_SUPPORTED},