From 54fb9d173423c5afa6dc82ba04920065ae19c34e Mon Sep 17 00:00:00 2001
From: Naveen M K <naveen521kk@gmail.com>
Date: Fri, 23 Jun 2023 20:13:23 +0530
Subject: [PATCH] include `_multiprocessing/semaphore.c` on win32

while building `_multiprocessing` extension
also, always build that module on win32
---
 configure.ac | 2 +-
 setup.py     | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/configure.ac b/configure.ac
index 2c01463e8f45c7..4ab78facd90a0a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -7447,7 +7447,7 @@ PY_STDLIB_MOD_SIMPLE([_zoneinfo])
 
 dnl multiprocessing modules
 PY_STDLIB_MOD([_multiprocessing],
-  [], [test "$ac_cv_func_sem_unlink" = "yes"],
+  [], [test "$ac_cv_func_sem_unlink" = "yes" -o "$MACHDEP" = "win32"],
   [-I\$(srcdir)/Modules/_multiprocessing])
 PY_STDLIB_MOD([_posixshmem],
   [], [test "$have_posix_shmem" = "yes"],
diff --git a/setup.py b/setup.py
index f155c3bd19f520..8d2e2518af0dba 100644
--- a/setup.py
+++ b/setup.py
@@ -1372,10 +1372,10 @@ def detect_multiprocessing(self):
         if (
             sysconfig.get_config_var('HAVE_SEM_OPEN') and not
             sysconfig.get_config_var('POSIX_SEMAPHORES_NOT_ENABLED')
-        ):
+        ) or MS_WINDOWS:
             multiprocessing_srcs.append('_multiprocessing/semaphore.c')
         self.addext(Extension('_multiprocessing', multiprocessing_srcs,
-                              libraries=(['ws2_32'] if MS_WINDOWS else None)))
+                              libraries=(['ws2_32'] if MS_WINDOWS else None), include_dirs=["Modules/_multiprocessing"]))
         self.addext(Extension('_posixshmem', ['_multiprocessing/posixshmem.c']))
 
     def detect_uuid(self):