From 2fdfee1519a62e6ab45c5fb78cbbdd97e74a74a0 Mon Sep 17 00:00:00 2001
From: Collin Funk <collin.funk1@gmail.com>
Date: Sun, 2 Feb 2025 09:11:54 -0800
Subject: [PATCH] gh-129539: Include sysexits.h before checking EX_OK

Previously the macro would be redefined when the header was included.
---
 .../Build/2025-02-02-09-11-45.gh-issue-129539.SYXXCg.rst  | 1 +
 Modules/posixmodule.c                                     | 8 ++++----
 2 files changed, 5 insertions(+), 4 deletions(-)
 create mode 100644 Misc/NEWS.d/next/Build/2025-02-02-09-11-45.gh-issue-129539.SYXXCg.rst

diff --git a/Misc/NEWS.d/next/Build/2025-02-02-09-11-45.gh-issue-129539.SYXXCg.rst b/Misc/NEWS.d/next/Build/2025-02-02-09-11-45.gh-issue-129539.SYXXCg.rst
new file mode 100644
index 00000000000000..9781dc05b64823
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2025-02-02-09-11-45.gh-issue-129539.SYXXCg.rst
@@ -0,0 +1 @@
+Don't redefine ``EX_OK`` when the system has the ``sysexits.h`` header.
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 6b2cb96629dc6c..40d0f86e6aecdd 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -52,10 +52,6 @@
 #  include "winreparse.h"
 #endif
 
-#if !defined(EX_OK) && defined(EXIT_SUCCESS)
-#  define EX_OK EXIT_SUCCESS
-#endif
-
 #ifdef __APPLE__
  /* Needed for the implementation of os.statvfs */
 #  include <sys/param.h>
@@ -292,6 +288,10 @@ corresponding Unix manual entries for more information on calls.");
 #  include <sysexits.h>
 #endif
 
+#if !defined(EX_OK) && defined(EXIT_SUCCESS)
+#  define EX_OK EXIT_SUCCESS
+#endif
+
 #ifdef HAVE_SYS_LOADAVG_H
 #  include <sys/loadavg.h>
 #endif