Issue #23500: Argument Clinic is now smarter about generating the "#ifndef"

(empty) definition of the methoddef macro: it's only generated once, even
if Argument Clinic processes the same symbol multiple times, and it's emitted
at the end of all processing rather than immediately after the first use.

Author: larryhastings

Misc/NEWS

@@ -268,6 +268,11 @@ Tests
 Tools/Demos
 -----------
 
+- Issue #23500: Argument Clinic is now smarter about generating the "#ifndef"
+  (empty) definition of the methoddef macro: it's only generated once, even
+  if Argument Clinic processes the same symbol multiple times, and it's emitted
+  at the end of all processing rather than immediately after the first use.
+
 - Issue #22826: The result of open() in Tools/freeze/bkfile.py is now better
   compatible with regular files (in particular it now supports the context
   management protocol).

Modules/clinic/spwdmodule.c.h

@@ -36,10 +36,6 @@ spwd_getspnam(PyModuleDef *module, PyObject *args)
 
 #endif /* defined(HAVE_GETSPNAM) */
 
-#ifndef SPWD_GETSPNAM_METHODDEF
-    #define SPWD_GETSPNAM_METHODDEF
-#endif /* !defined(SPWD_GETSPNAM_METHODDEF) */
-
 #if defined(HAVE_GETSPENT)
 
 PyDoc_STRVAR(spwd_getspall__doc__,
@@ -64,7 +60,11 @@ spwd_getspall(PyModuleDef *module, PyObject *Py_UNUSED(ignored))
 
 #endif /* defined(HAVE_GETSPENT) */
 
+#ifndef SPWD_GETSPNAM_METHODDEF
+    #define SPWD_GETSPNAM_METHODDEF
+#endif /* !defined(SPWD_GETSPNAM_METHODDEF) */
+
 #ifndef SPWD_GETSPALL_METHODDEF
     #define SPWD_GETSPALL_METHODDEF
 #endif /* !defined(SPWD_GETSPALL_METHODDEF) */
-/*[clinic end generated code: output=41fec4a15b0cd2a0 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=ab16125c5e5f2b1b input=a9049054013a1b77]*/

Modules/clinic/zlibmodule.c.h

@@ -314,10 +314,6 @@ zlib_Compress_copy(compobject *self, PyObject *Py_UNUSED(ignored))
 
 #endif /* defined(HAVE_ZLIB_COPY) */
 
-#ifndef ZLIB_COMPRESS_COPY_METHODDEF
-    #define ZLIB_COMPRESS_COPY_METHODDEF
-#endif /* !defined(ZLIB_COMPRESS_COPY_METHODDEF) */
-
 #if defined(HAVE_ZLIB_COPY)
 
 PyDoc_STRVAR(zlib_Decompress_copy__doc__,
@@ -340,10 +336,6 @@ zlib_Decompress_copy(compobject *self, PyObject *Py_UNUSED(ignored))
 
 #endif /* defined(HAVE_ZLIB_COPY) */
 
-#ifndef ZLIB_DECOMPRESS_COPY_METHODDEF
-    #define ZLIB_DECOMPRESS_COPY_METHODDEF
-#endif /* !defined(ZLIB_DECOMPRESS_COPY_METHODDEF) */
-
 PyDoc_STRVAR(zlib_Decompress_flush__doc__,
 "flush($self, length=zlib.DEF_BUF_SIZE, /)\n"
 "--\n"
@@ -450,4 +442,8 @@ zlib_crc32(PyModuleDef *module, PyObject *args)
 
     return return_value;
 }
-/*[clinic end generated code: output=bc9473721ca7c962 input=a9049054013a1b77]*/
+
+#ifndef ZLIB_COMPRESS_COPY_METHODDEF
+    #define ZLIB_COMPRESS_COPY_METHODDEF
+#endif /* !defined(ZLIB_COMPRESS_COPY_METHODDEF) */
+/*[clinic end generated code: output=901c18189767dc08 input=a9049054013a1b77]*/

Modules/posixmodule.c

@@ -17130,10 +17130,6 @@ dump buffer
     #define OS_SYSTEM_METHODDEF
 #endif /* !defined(OS_SYSTEM_METHODDEF) */
 
-#ifndef OS_SYSTEM_METHODDEF
-    #define OS_SYSTEM_METHODDEF
-#endif /* !defined(OS_SYSTEM_METHODDEF) */
-
 #ifndef OS_UNAME_METHODDEF
     #define OS_UNAME_METHODDEF
 #endif /* !defined(OS_UNAME_METHODDEF) */
@@ -17306,10 +17302,6 @@ dump buffer
     #define OS_WAITPID_METHODDEF
 #endif /* !defined(OS_WAITPID_METHODDEF) */
 
-#ifndef OS_WAITPID_METHODDEF
-    #define OS_WAITPID_METHODDEF
-#endif /* !defined(OS_WAITPID_METHODDEF) */
-
 #ifndef OS_WAIT_METHODDEF
     #define OS_WAIT_METHODDEF
 #endif /* !defined(OS_WAIT_METHODDEF) */
@@ -17410,10 +17402,6 @@ dump buffer
     #define OS_PUTENV_METHODDEF
 #endif /* !defined(OS_PUTENV_METHODDEF) */
 
-#ifndef OS_PUTENV_METHODDEF
-    #define OS_PUTENV_METHODDEF
-#endif /* !defined(OS_PUTENV_METHODDEF) */
-
 #ifndef OS_UNSETENV_METHODDEF
     #define OS_UNSETENV_METHODDEF
 #endif /* !defined(OS_UNSETENV_METHODDEF) */
@@ -17521,7 +17509,7 @@ dump buffer
 #ifndef OS_SET_HANDLE_INHERITABLE_METHODDEF
     #define OS_SET_HANDLE_INHERITABLE_METHODDEF
 #endif /* !defined(OS_SET_HANDLE_INHERITABLE_METHODDEF) */
-/*[clinic end generated code: output=52a6140b0b052ce6 input=524ce2e021e4eba6]*/
+/*[clinic end generated code: output=b788c2d6010113e8 input=524ce2e021e4eba6]*/
 
 
 static PyMethodDef posix_methods[] = {