s4/librpc: squash 'cast between incompatible function types' warning

Where possible make PyCFunction definition signature match. Sometimes
this is not possible (e.g. when the c-function is associated with a
python method definition with 'METH_VARARGS|METH_KEYWORDS' in this
case we use the PY_DISCARD_FUNC_SIG macro.

Signed-off-by: Noel Power <noel.power@suse.com>
Reviewed-by: Andreas Schneider <asn@samba.org>

source4/librpc/ndr/py_security.c

@@ -343,28 +343,32 @@ static PyObject *py_token_has_sid(PyObject *self, PyObject *args)
 	return PyBool_FromLong(security_token_has_sid(token, sid));
 }
 
-static PyObject *py_token_is_anonymous(PyObject *self)
+static PyObject *py_token_is_anonymous(PyObject *self,
+	PyObject *Py_UNUSED(ignored))
 {
 	struct security_token *token = pytalloc_get_ptr(self);
 	
 	return PyBool_FromLong(security_token_is_anonymous(token));
 }
 
-static PyObject *py_token_is_system(PyObject *self)
+static PyObject *py_token_is_system(PyObject *self,
+	PyObject *Py_UNUSED(ignored))
 {
 	struct security_token *token = pytalloc_get_ptr(self);
 	
 	return PyBool_FromLong(security_token_is_system(token));
 }
 
-static PyObject *py_token_has_builtin_administrators(PyObject *self)
+static PyObject *py_token_has_builtin_administrators(PyObject *self,
+	PyObject *Py_UNUSED(ignored))
 {
 	struct security_token *token = pytalloc_get_ptr(self);
 	
 	return PyBool_FromLong(security_token_has_builtin_administrators(token));
 }
 
-static PyObject *py_token_has_nt_authenticated_users(PyObject *self)
+static PyObject *py_token_has_nt_authenticated_users(PyObject *self,
+	PyObject *Py_UNUSED(ignored))
 {
 	struct security_token *token = pytalloc_get_ptr(self);
 	
@@ -447,7 +451,8 @@ static PyObject *py_privilege_id(PyObject *self, PyObject *args)
 	return PyInt_FromLong(sec_privilege_id(name));
 }
 
-static PyObject *py_random_sid(PyObject *self)
+static PyObject *py_random_sid(PyObject *self,
+	PyObject *Py_UNUSED(ignored))
 {
 	struct dom_sid *sid;
 	PyObject *ret;

source4/librpc/rpc/pyrpc.c

@@ -20,6 +20,7 @@
 #include <Python.h>
 #include "python/py3compat.h"
 #include "includes.h"
+#include "python/modules.h"
 #include <structmember.h>
 #include "librpc/rpc/pyrpc.h"
 #include "lib/events/events.h"
@@ -293,7 +294,10 @@ static PyObject *py_iface_request(PyObject *self, PyObject *args, PyObject *kwar
 }
 
 static PyMethodDef dcerpc_interface_methods[] = {
-	{ "request", (PyCFunction)py_iface_request, METH_VARARGS|METH_KEYWORDS, "S.request(opnum, data, object=None) -> data\nMake a raw request" },
+	{ "request", PY_DISCARD_FUNC_SIG(PyCFunction, py_iface_request),
+		METH_VARARGS|METH_KEYWORDS,
+		"S.request(opnum, data, object=None) -> data\n"
+		"Make a raw request" },
 	{ NULL, NULL, 0, NULL },
 };
 

source4/librpc/rpc/pyrpc_util.c

@@ -23,6 +23,7 @@
 #include <Python.h>
 #include "python/py3compat.h"
 #include "includes.h"
+#include "python/modules.h"
 #include "librpc/rpc/pyrpc_util.h"
 #include "librpc/rpc/dcerpc.h"
 #include "librpc/rpc/pyrpc.h"
@@ -324,7 +325,8 @@ bool PyInterface_AddNdrRpcMethods(PyTypeObject *ifacetype, const struct PyNdrRpc
 		}
 		wb->name = discard_const_p(char, mds[i].name);
 		wb->flags = PyWrapperFlag_KEYWORDS;
-		wb->wrapper = (wrapperfunc)py_dcerpc_call_wrapper;
+		wb->wrapper = PY_DISCARD_FUNC_SIG(wrapperfunc,
+						  py_dcerpc_call_wrapper);
 		wb->doc = discard_const_p(char, mds[i].doc);
 
 		ret = PyDescr_NewWrapper(ifacetype, wb, discard_const_p(void, &mds[i]));