From 869684e757ad8bf10c91e67ba20f59597357476f Mon Sep 17 00:00:00 2001
From: Sebastian Ramacher <sebastian@ramacher.at>
Date: Sun, 8 Oct 2023 11:22:55 +0200
Subject: [PATCH] Avoid redefinition of _XOPEN_SOURCE

---
 cwcwidth/wcwidth_compat.h | 6 ++++++
 setup.py                  | 9 +++------
 2 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/cwcwidth/wcwidth_compat.h b/cwcwidth/wcwidth_compat.h
index 538fcd2..fec7b3a 100644
--- a/cwcwidth/wcwidth_compat.h
+++ b/cwcwidth/wcwidth_compat.h
@@ -23,6 +23,12 @@
 #ifndef WCWIDTH_COMPAT_H
 #define WCWIDTH_COMPAT_H
 
+#include <pyconfig.h>
+
+#if !defined(_WIN32) && !defined(_XOPEN_SOURCE)
+#define _XOPEN_SOURCE
+#endif
+
 #include <wchar.h>
 
 #if defined(USE_MK_WCWIDTH)
diff --git a/setup.py b/setup.py
index a1ad1aa..f8a3666 100644
--- a/setup.py
+++ b/setup.py
@@ -5,15 +5,12 @@
 
 
 extension_sources = ["cwcwidth/_impl.pyx"]
+define_macros = []
 if platform.system() == "Windows":
     extension_sources.append("cwcwidth/wcwidth.c")
-    define_macros = [
+    define_macrosa.append(
         ("USE_MK_WCWIDTH", None),
-    ]
-else:
-    define_macros = [
-        ("_XOPEN_SOURCE", "600"),
-    ]
+    )
 
 ext_modules = [
     Extension(