gh-141488: Rename C API macro

Include/datetime.h

@@ -1,8 +1,8 @@
 /*  datetime.h
  */
 #ifndef Py_LIMITED_API
-#ifndef DATETIME_H
-#define DATETIME_H
+#ifndef Py_DATETIME_H
+#define Py_DATETIME_H
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -263,5 +263,5 @@ static PyDateTime_CAPI *PyDateTimeAPI = NULL;
 #ifdef __cplusplus
 }
 #endif
-#endif
+#endif /* !Py_DATETIME_H */
 #endif /* !Py_LIMITED_API */

Include/internal/mimalloc/mimalloc.h

@@ -5,8 +5,8 @@ terms of the MIT license. A copy of the license can be found in the file
 "LICENSE" at the root of this distribution.
 -----------------------------------------------------------------------------*/
 #pragma once
-#ifndef MIMALLOC_H
-#define MIMALLOC_H
+#ifndef Py_MIMALLOC_H
+#define Py_MIMALLOC_H
 
 #define MI_MALLOC_VERSION 212   // major + 2 digits minor
 

Include/internal/mimalloc/mimalloc/atomic.h

@@ -5,8 +5,8 @@ terms of the MIT license. A copy of the license can be found in the file
 "LICENSE" at the root of this distribution.
 -----------------------------------------------------------------------------*/
 #pragma once
-#ifndef MIMALLOC_ATOMIC_H
-#define MIMALLOC_ATOMIC_H
+#ifndef Py_MIMALLOC_ATOMIC_H
+#define Py_MIMALLOC_ATOMIC_H
 
 // --------------------------------------------------------------------------------------------
 // Atomics
@@ -389,4 +389,4 @@ static inline void mi_atomic_yield(void) {
 #endif
 
 
-#endif // __MIMALLOC_ATOMIC_H
+#endif // Py_MIMALLOC_ATOMIC_H

Include/internal/mimalloc/mimalloc/internal.h

@@ -5,8 +5,8 @@ terms of the MIT license. A copy of the license can be found in the file
 "LICENSE" at the root of this distribution.
 -----------------------------------------------------------------------------*/
 #pragma once
-#ifndef MIMALLOC_INTERNAL_H
-#define MIMALLOC_INTERNAL_H
+#ifndef Py_MIMALLOC_INTERNAL_H
+#define Py_MIMALLOC_INTERNAL_H
 
 
 // --------------------------------------------------------------------------

Include/internal/mimalloc/mimalloc/prim.h

@@ -5,8 +5,8 @@ terms of the MIT license. A copy of the license can be found in the file
 "LICENSE" at the root of this distribution.
 -----------------------------------------------------------------------------*/
 #pragma once
-#ifndef MIMALLOC_PRIM_H
-#define MIMALLOC_PRIM_H
+#ifndef Py_MIMALLOC_PRIM_H
+#define Py_MIMALLOC_PRIM_H
 
 
 // --------------------------------------------------------------------------
@@ -326,4 +326,4 @@ static inline mi_heap_t* mi_prim_get_default_heap(void) {
 
 
 
-#endif  // MIMALLOC_PRIM_H
+#endif  // Py_MIMALLOC_PRIM_H

Include/internal/mimalloc/mimalloc/track.h

@@ -5,8 +5,8 @@ terms of the MIT license. A copy of the license can be found in the file
 "LICENSE" at the root of this distribution.
 -----------------------------------------------------------------------------*/
 #pragma once
-#ifndef MIMALLOC_TRACK_H
-#define MIMALLOC_TRACK_H
+#ifndef Py_MIMALLOC_TRACK_H
+#define Py_MIMALLOC_TRACK_H
 
 /* ------------------------------------------------------------------------------------------------------
 Track memory ranges with macros for tools like Valgrind address sanitizer, or other memory checkers.

Include/internal/mimalloc/mimalloc/types.h

@@ -5,8 +5,8 @@ terms of the MIT license. A copy of the license can be found in the file
 "LICENSE" at the root of this distribution.
 -----------------------------------------------------------------------------*/
 #pragma once
-#ifndef MIMALLOC_TYPES_H
-#define MIMALLOC_TYPES_H
+#ifndef Py_MIMALLOC_TYPES_H
+#define Py_MIMALLOC_TYPES_H
 
 // --------------------------------------------------------------------------
 // This file contains the main type definitions for mimalloc:

Misc/NEWS.d/next/C_API/2025-11-13-14-28-21.gh-issue-141488.z3saMw.rst

@@ -0,0 +1 @@
+Rename the head including control macros which do not start with "Py"