$NetBSD: patch-ad,v 1.6 2005/11/10 22:18:33 joerg Exp $

--- stdenv.h.orig	1995-05-30 07:13:53.000000000 -0400
+++ stdenv.h
@@ -44,9 +44,7 @@
 #include <signal.h>
 #include <ctype.h>
 
-#if REQUIRE_STAT || REQUIRE_IOCTL
 #include <sys/types.h>
-#endif
 
 #if REQUIRE_IOCTL
 #include <sys/ioctl.h>
@@ -239,7 +237,7 @@ extern int getgroups(int, int *);
  * hacks to present a standard system call interface
  */
 
-#ifdef linux
+#if defined(linux) || defined(__INTERIX)
 #include "unistd.h"
 #define setpgrp(a, b)	setpgid(a, b)
 #endif
@@ -283,6 +281,7 @@ extern int getgroups(int, int *);
 
 /* stdlib */
 
+#if !defined(__FreeBSD__) && !defined(__NetBSD__) && !defined(__OpenBSD__) && !defined(__INTERIX) && !defined(__APPLE__) && !defined(__DragonFly__)
 extern noreturn exit(int);
 extern noreturn abort(void);
 extern long strtol(const char *num, char **end, int base);
@@ -290,6 +289,7 @@ extern void *qsort(
 	void *base, size_t nmemb, size_t size,
 	int (*compar)(const void *, const void *)
 );
+#endif
 
 /* setjmp */