pythongh-108765: Python.h no longer includes <sys/time.h>

Python.h no longer includes these standard header files: <time.h>,
<sys/select.h> and <sys/time.h>. They should now be included
explicitly if needed.

Doc/whatsnew/3.13.rst

@@ -915,6 +915,11 @@ New Features
 Porting to Python 3.13
 ----------------------
 
+* ``Python.h`` no longer includes these standard header files: ``<time.h>``,
+  ``<sys/select.h>`` and ``<sys/time.h>``. They should now be included
+  explicitly if needed.
+  (Contributed by Victor Stinner in :gh:`108765`.)
+
 Deprecated
 ----------
 

Include/pyport.h

@@ -195,25 +195,6 @@ typedef Py_ssize_t Py_ssize_clean_t;
 
 #include <math.h> /* Moved here from the math section, before extern "C" */
 
-/********************************************
- * WRAPPER FOR <time.h> and/or <sys/time.h> *
- ********************************************/
-
-#ifdef HAVE_SYS_TIME_H
-#include <sys/time.h>
-#endif
-#include <time.h>
-
-/******************************
- * WRAPPER FOR <sys/select.h> *
- ******************************/
-
-/* NB caller must include <sys/types.h> */
-
-#ifdef HAVE_SYS_SELECT_H
-#include <sys/select.h>
-#endif /* !HAVE_SYS_SELECT_H */
-
 /*******************************
  * stat() and fstat() fiddling *
  *******************************/

Misc/NEWS.d/next/C API/2023-09-01-18-42-31.gh-issue-108765.IyYNDu.rst

@@ -0,0 +1,3 @@
+``Python.h`` no longer includes these standard header files: ``<time.h>``,
+``<sys/select.h>`` and ``<sys/time.h>``. They should now be included
+explicitly if needed. Patch by Victor Stinner.

Modules/_multiprocessing/semaphore.c

@@ -9,6 +9,10 @@
 
 #include "multiprocessing.h"
 
+#ifdef HAVE_SYS_TIME_H
+#  include <sys/time.h>           // gettimeofday()
+#endif
+
 #ifdef HAVE_MP_SEMAPHORE
 
 enum { RECURSIVE_MUTEX, SEMAPHORE };

Modules/posixmodule.c

@@ -57,6 +57,10 @@
 
 #include <stdio.h>                // ctermid()
 #include <stdlib.h>               // system()
+#ifdef HAVE_SYS_TIME_H
+#  include <sys/time.h>           // futimes()
+#endif
+
 
 /*
  * A number of APIs are available on macOS from a certain macOS version.