gh-108765: multiprocessing.h includes <unistd.h> (#108823)

diff --git a/Modules/_multiprocessing/multiprocessing.h b/Modules/_multiprocessing/multiprocessing.h
index 296e0abb29a0f5851968a16695df8118090f9958..099004b437828efa9e408d6b7439650c10d44e39 100644 (file)
--- 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
  */