bpo-33012: Fix invalid function cast warnings with gcc 8 in Argument Clinic. (GH-6748)

Fix invalid function cast warnings with gcc 8
for method conventions different from METH_NOARGS, METH_O and
METH_VARARGS in Argument Clinic generated code.

Python/clinic/_warnings.c.h

@@ -9,7 +9,7 @@ PyDoc_STRVAR(warnings_warn__doc__,
 "Issue a warning, or maybe ignore it or raise an exception.");
 
 #define WARNINGS_WARN_METHODDEF    \
-    {"warn", (PyCFunction)warnings_warn, METH_FASTCALL|METH_KEYWORDS, warnings_warn__doc__},
+    {"warn", (PyCFunction)(void(*)(void))warnings_warn, METH_FASTCALL|METH_KEYWORDS, warnings_warn__doc__},
 
 static PyObject *
 warnings_warn_impl(PyObject *module, PyObject *message, PyObject *category,
@@ -35,4 +35,4 @@ warnings_warn(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObjec
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=86369ece63001d78 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=a4fbe6e2d1cc2091 input=a9049054013a1b77]*/

Python/clinic/bltinmodule.c.h

@@ -82,7 +82,7 @@ PyDoc_STRVAR(builtin_format__doc__,
 "details.");
 
 #define BUILTIN_FORMAT_METHODDEF    \
-    {"format", (PyCFunction)builtin_format, METH_FASTCALL, builtin_format__doc__},
+    {"format", (PyCFunction)(void(*)(void))builtin_format, METH_FASTCALL, builtin_format__doc__},
 
 static PyObject *
 builtin_format_impl(PyObject *module, PyObject *value, PyObject *format_spec);
@@ -150,7 +150,7 @@ PyDoc_STRVAR(builtin_compile__doc__,
 "in addition to any features explicitly specified.");
 
 #define BUILTIN_COMPILE_METHODDEF    \
-    {"compile", (PyCFunction)builtin_compile, METH_FASTCALL|METH_KEYWORDS, builtin_compile__doc__},
+    {"compile", (PyCFunction)(void(*)(void))builtin_compile, METH_FASTCALL|METH_KEYWORDS, builtin_compile__doc__},
 
 static PyObject *
 builtin_compile_impl(PyObject *module, PyObject *source, PyObject *filename,
@@ -187,7 +187,7 @@ PyDoc_STRVAR(builtin_divmod__doc__,
 "Return the tuple (x//y, x%y).  Invariant: div*y + mod == x.");
 
 #define BUILTIN_DIVMOD_METHODDEF    \
-    {"divmod", (PyCFunction)builtin_divmod, METH_FASTCALL, builtin_divmod__doc__},
+    {"divmod", (PyCFunction)(void(*)(void))builtin_divmod, METH_FASTCALL, builtin_divmod__doc__},
 
 static PyObject *
 builtin_divmod_impl(PyObject *module, PyObject *x, PyObject *y);
@@ -223,7 +223,7 @@ PyDoc_STRVAR(builtin_eval__doc__,
 "If only globals is given, locals defaults to it.");
 
 #define BUILTIN_EVAL_METHODDEF    \
-    {"eval", (PyCFunction)builtin_eval, METH_FASTCALL, builtin_eval__doc__},
+    {"eval", (PyCFunction)(void(*)(void))builtin_eval, METH_FASTCALL, builtin_eval__doc__},
 
 static PyObject *
 builtin_eval_impl(PyObject *module, PyObject *source, PyObject *globals,
@@ -261,7 +261,7 @@ PyDoc_STRVAR(builtin_exec__doc__,
 "If only globals is given, locals defaults to it.");
 
 #define BUILTIN_EXEC_METHODDEF    \
-    {"exec", (PyCFunction)builtin_exec, METH_FASTCALL, builtin_exec__doc__},
+    {"exec", (PyCFunction)(void(*)(void))builtin_exec, METH_FASTCALL, builtin_exec__doc__},
 
 static PyObject *
 builtin_exec_impl(PyObject *module, PyObject *source, PyObject *globals,
@@ -316,7 +316,7 @@ PyDoc_STRVAR(builtin_hasattr__doc__,
 "This is done by calling getattr(obj, name) and catching AttributeError.");
 
 #define BUILTIN_HASATTR_METHODDEF    \
-    {"hasattr", (PyCFunction)builtin_hasattr, METH_FASTCALL, builtin_hasattr__doc__},
+    {"hasattr", (PyCFunction)(void(*)(void))builtin_hasattr, METH_FASTCALL, builtin_hasattr__doc__},
 
 static PyObject *
 builtin_hasattr_impl(PyObject *module, PyObject *obj, PyObject *name);
@@ -360,7 +360,7 @@ PyDoc_STRVAR(builtin_setattr__doc__,
 "setattr(x, \'y\', v) is equivalent to ``x.y = v\'\'");
 
 #define BUILTIN_SETATTR_METHODDEF    \
-    {"setattr", (PyCFunction)builtin_setattr, METH_FASTCALL, builtin_setattr__doc__},
+    {"setattr", (PyCFunction)(void(*)(void))builtin_setattr, METH_FASTCALL, builtin_setattr__doc__},
 
 static PyObject *
 builtin_setattr_impl(PyObject *module, PyObject *obj, PyObject *name,
@@ -394,7 +394,7 @@ PyDoc_STRVAR(builtin_delattr__doc__,
 "delattr(x, \'y\') is equivalent to ``del x.y\'\'");
 
 #define BUILTIN_DELATTR_METHODDEF    \
-    {"delattr", (PyCFunction)builtin_delattr, METH_FASTCALL, builtin_delattr__doc__},
+    {"delattr", (PyCFunction)(void(*)(void))builtin_delattr, METH_FASTCALL, builtin_delattr__doc__},
 
 static PyObject *
 builtin_delattr_impl(PyObject *module, PyObject *obj, PyObject *name);
@@ -503,7 +503,7 @@ PyDoc_STRVAR(builtin_pow__doc__,
 "invoked using the three argument form.");
 
 #define BUILTIN_POW_METHODDEF    \
-    {"pow", (PyCFunction)builtin_pow, METH_FASTCALL, builtin_pow__doc__},
+    {"pow", (PyCFunction)(void(*)(void))builtin_pow, METH_FASTCALL, builtin_pow__doc__},
 
 static PyObject *
 builtin_pow_impl(PyObject *module, PyObject *x, PyObject *y, PyObject *z);
@@ -540,7 +540,7 @@ PyDoc_STRVAR(builtin_input__doc__,
 "On *nix systems, readline is used if available.");
 
 #define BUILTIN_INPUT_METHODDEF    \
-    {"input", (PyCFunction)builtin_input, METH_FASTCALL, builtin_input__doc__},
+    {"input", (PyCFunction)(void(*)(void))builtin_input, METH_FASTCALL, builtin_input__doc__},
 
 static PyObject *
 builtin_input_impl(PyObject *module, PyObject *prompt);
@@ -583,7 +583,7 @@ PyDoc_STRVAR(builtin_round__doc__,
 "the return value has the same type as the number.  ndigits may be negative.");
 
 #define BUILTIN_ROUND_METHODDEF    \
-    {"round", (PyCFunction)builtin_round, METH_FASTCALL|METH_KEYWORDS, builtin_round__doc__},
+    {"round", (PyCFunction)(void(*)(void))builtin_round, METH_FASTCALL|METH_KEYWORDS, builtin_round__doc__},
 
 static PyObject *
 builtin_round_impl(PyObject *module, PyObject *number, PyObject *ndigits);
@@ -618,7 +618,7 @@ PyDoc_STRVAR(builtin_sum__doc__,
 "reject non-numeric types.");
 
 #define BUILTIN_SUM_METHODDEF    \
-    {"sum", (PyCFunction)builtin_sum, METH_FASTCALL|METH_KEYWORDS, builtin_sum__doc__},
+    {"sum", (PyCFunction)(void(*)(void))builtin_sum, METH_FASTCALL|METH_KEYWORDS, builtin_sum__doc__},
 
 static PyObject *
 builtin_sum_impl(PyObject *module, PyObject *iterable, PyObject *start);
@@ -653,7 +653,7 @@ PyDoc_STRVAR(builtin_isinstance__doc__,
 "or ...`` etc.");
 
 #define BUILTIN_ISINSTANCE_METHODDEF    \
-    {"isinstance", (PyCFunction)builtin_isinstance, METH_FASTCALL, builtin_isinstance__doc__},
+    {"isinstance", (PyCFunction)(void(*)(void))builtin_isinstance, METH_FASTCALL, builtin_isinstance__doc__},
 
 static PyObject *
 builtin_isinstance_impl(PyObject *module, PyObject *obj,
@@ -688,7 +688,7 @@ PyDoc_STRVAR(builtin_issubclass__doc__,
 "or ...`` etc.");
 
 #define BUILTIN_ISSUBCLASS_METHODDEF    \
-    {"issubclass", (PyCFunction)builtin_issubclass, METH_FASTCALL, builtin_issubclass__doc__},
+    {"issubclass", (PyCFunction)(void(*)(void))builtin_issubclass, METH_FASTCALL, builtin_issubclass__doc__},
 
 static PyObject *
 builtin_issubclass_impl(PyObject *module, PyObject *cls,
@@ -711,4 +711,4 @@ builtin_issubclass(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=eb6d08a32e7c83b6 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=fa8d97ac8695363b input=a9049054013a1b77]*/

Python/clinic/context.c.h

@@ -12,7 +12,7 @@ PyDoc_STRVAR(_contextvars_Context_get__doc__,
 "return None.");
 
 #define _CONTEXTVARS_CONTEXT_GET_METHODDEF    \
-    {"get", (PyCFunction)_contextvars_Context_get, METH_FASTCALL, _contextvars_Context_get__doc__},
+    {"get", (PyCFunction)(void(*)(void))_contextvars_Context_get, METH_FASTCALL, _contextvars_Context_get__doc__},
 
 static PyObject *
 _contextvars_Context_get_impl(PyContext *self, PyObject *key,
@@ -123,7 +123,7 @@ PyDoc_STRVAR(_contextvars_ContextVar_get__doc__,
 " * raise a LookupError.");
 
 #define _CONTEXTVARS_CONTEXTVAR_GET_METHODDEF    \
-    {"get", (PyCFunction)_contextvars_ContextVar_get, METH_FASTCALL, _contextvars_ContextVar_get__doc__},
+    {"get", (PyCFunction)(void(*)(void))_contextvars_ContextVar_get, METH_FASTCALL, _contextvars_ContextVar_get__doc__},
 
 static PyObject *
 _contextvars_ContextVar_get_impl(PyContextVar *self, PyObject *default_value);
@@ -170,4 +170,4 @@ PyDoc_STRVAR(_contextvars_ContextVar_reset__doc__,
 
 #define _CONTEXTVARS_CONTEXTVAR_RESET_METHODDEF    \
     {"reset", (PyCFunction)_contextvars_ContextVar_reset, METH_O, _contextvars_ContextVar_reset__doc__},
-/*[clinic end generated code: output=33414d13716d0648 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=9c93e22bcadbaa2b input=a9049054013a1b77]*/

Python/clinic/import.c.h

@@ -75,7 +75,7 @@ PyDoc_STRVAR(_imp__fix_co_filename__doc__,
 "    File path to use.");
 
 #define _IMP__FIX_CO_FILENAME_METHODDEF    \
-    {"_fix_co_filename", (PyCFunction)_imp__fix_co_filename, METH_FASTCALL, _imp__fix_co_filename__doc__},
+    {"_fix_co_filename", (PyCFunction)(void(*)(void))_imp__fix_co_filename, METH_FASTCALL, _imp__fix_co_filename__doc__},
 
 static PyObject *
 _imp__fix_co_filename_impl(PyObject *module, PyCodeObject *code,
@@ -269,7 +269,7 @@ PyDoc_STRVAR(_imp_create_dynamic__doc__,
 "Create an extension module.");
 
 #define _IMP_CREATE_DYNAMIC_METHODDEF    \
-    {"create_dynamic", (PyCFunction)_imp_create_dynamic, METH_FASTCALL, _imp_create_dynamic__doc__},
+    {"create_dynamic", (PyCFunction)(void(*)(void))_imp_create_dynamic, METH_FASTCALL, _imp_create_dynamic__doc__},
 
 static PyObject *
 _imp_create_dynamic_impl(PyObject *module, PyObject *spec, PyObject *file);
@@ -360,7 +360,7 @@ PyDoc_STRVAR(_imp_source_hash__doc__,
 "\n");
 
 #define _IMP_SOURCE_HASH_METHODDEF    \
-    {"source_hash", (PyCFunction)_imp_source_hash, METH_FASTCALL|METH_KEYWORDS, _imp_source_hash__doc__},
+    {"source_hash", (PyCFunction)(void(*)(void))_imp_source_hash, METH_FASTCALL|METH_KEYWORDS, _imp_source_hash__doc__},
 
 static PyObject *
 _imp_source_hash_impl(PyObject *module, long key, Py_buffer *source);
@@ -396,4 +396,4 @@ exit:
 #ifndef _IMP_EXEC_DYNAMIC_METHODDEF
     #define _IMP_EXEC_DYNAMIC_METHODDEF
 #endif /* !defined(_IMP_EXEC_DYNAMIC_METHODDEF) */
-/*[clinic end generated code: output=f0660cd1de6b3a73 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=ad747b76e105fff2 input=a9049054013a1b77]*/

Python/clinic/marshal.c.h

@@ -20,7 +20,7 @@ PyDoc_STRVAR(marshal_dump__doc__,
 "to the file. The object will not be properly read back by load().");
 
 #define MARSHAL_DUMP_METHODDEF    \
-    {"dump", (PyCFunction)marshal_dump, METH_FASTCALL, marshal_dump__doc__},
+    {"dump", (PyCFunction)(void(*)(void))marshal_dump, METH_FASTCALL, marshal_dump__doc__},
 
 static PyObject *
 marshal_dump_impl(PyObject *module, PyObject *value, PyObject *file,
@@ -78,7 +78,7 @@ PyDoc_STRVAR(marshal_dumps__doc__,
 "unsupported type.");
 
 #define MARSHAL_DUMPS_METHODDEF    \
-    {"dumps", (PyCFunction)marshal_dumps, METH_FASTCALL, marshal_dumps__doc__},
+    {"dumps", (PyCFunction)(void(*)(void))marshal_dumps, METH_FASTCALL, marshal_dumps__doc__},
 
 static PyObject *
 marshal_dumps_impl(PyObject *module, PyObject *value, int version);
@@ -134,4 +134,4 @@ exit:
 
     return return_value;
 }
-/*[clinic end generated code: output=584eb2222d86fdc3 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=cbb6128201bee7e0 input=a9049054013a1b77]*/

Python/clinic/sysmodule.c.h

@@ -13,7 +13,7 @@ PyDoc_STRVAR(sys_set_coroutine_origin_tracking_depth__doc__,
 "to disable.");
 
 #define SYS_SET_COROUTINE_ORIGIN_TRACKING_DEPTH_METHODDEF    \
-    {"set_coroutine_origin_tracking_depth", (PyCFunction)sys_set_coroutine_origin_tracking_depth, METH_FASTCALL|METH_KEYWORDS, sys_set_coroutine_origin_tracking_depth__doc__},
+    {"set_coroutine_origin_tracking_depth", (PyCFunction)(void(*)(void))sys_set_coroutine_origin_tracking_depth, METH_FASTCALL|METH_KEYWORDS, sys_set_coroutine_origin_tracking_depth__doc__},
 
 static PyObject *
 sys_set_coroutine_origin_tracking_depth_impl(PyObject *module, int depth);
@@ -63,4 +63,4 @@ sys_get_coroutine_origin_tracking_depth(PyObject *module, PyObject *Py_UNUSED(ig
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=4a3ac42b97d710ff input=a9049054013a1b77]*/
+/*[clinic end generated code: output=dfd3eb5b137a9861 input=a9049054013a1b77]*/