From f311367b47c42ffe0685f63a4b580497feeba40e Mon Sep 17 00:00:00 2001
From: Victor Stinner <vstinner@python.org>
Date: Sat, 2 Sep 2023 19:11:57 +0200
Subject: [PATCH] gh-108765: multiprocessing.h includes <unistd.h>

---
 Modules/_multiprocessing/multiprocessing.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Modules/_multiprocessing/multiprocessing.h b/Modules/_multiprocessing/multiprocessing.h
index 296e0abb29a0f5..099004b437828e 100644
--- a/Modules/_multiprocessing/multiprocessing.h
+++ b/Modules/_multiprocessing/multiprocessing.h
@@ -10,6 +10,10 @@
 #include "pythread.h"
 #include "pycore_signal.h"        // _PyOS_IsMainThread()
 
+#ifndef MS_WINDOWS
+#  include <unistd.h>             // sysconf()
+#endif
+
 /*
  * Platform includes and definitions
  */