From e70310c67b4f8897cb8f112e181563b8a14ee099 Mon Sep 17 00:00:00 2001
From: nhmall <nhmall@nethack.org>
Date: Thu, 11 May 2023 23:26:08 -0400
Subject: [PATCH] In file included from ../win/X11/winX.c:42: In file included
 from /opt/X11/include/X11/Xos.h:146: /opt/X11/include/X11/Xarch.h:44:13:
 fatal error: 'sys/byteorder.h' file not found             ^~~~~~~~~~~~~~~~~ 1
 error generated. make[1]: *** [winX.o] Error 1

Xarch.h has an #ifdef SVR4 block.
---
 include/global.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/global.h b/include/global.h
index c734ccaf7..5b15963d7 100644
--- a/include/global.h
+++ b/include/global.h
@@ -199,6 +199,7 @@ typedef uchar nhsym;
 #define PORT_ID "Mac"
 #endif
 #ifdef __APPLE__
+#undef SVR4   /* avoid a conflict in X11 header file */
 #define PORT_ID "MacOS"
 #endif
 #ifdef MSDOS