$NetBSD: patch-ae,v 1.2 2023/01/16 05:12:19 dholland Exp $

Detect more OSes.

--- load.h.orig	Sat Jul 21 22:46:17 2001
+++ load.h
@@ -21,7 +21,7 @@
 	return(newstr);
 }
 #endif
-#if defined(unix) || defined(__MACH__) || defined(__BEOS__)
+#if defined(unix) || defined(__unix__) || defined(__MACH__) || defined(__BEOS__) || defined(__SVR4__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
 #include <unistd.h>
 #endif
 #endif /* WIN32 */
@@ -29,7 +29,7 @@
 #include "SDL_FrameBuf.h"
 
 /* Pathing stuff for the different operating systems */
-#if defined(unix) || defined(__MACH__)
+#if defined(unix) || defined(__unix__) || defined(__MACH__) || defined(__SVR4__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
 #define DIR_SEP	"/"
 #define CUR_DIR	"."
 #elif defined(WIN32)