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$NetBSD: patch-aj,v 1.2 2006/03/01 14:40:34 joerg Exp $

--- rw/libpnmrw.c.orig	2006-02-23 21:15:15.000000000 +0000
+++ rw/libpnmrw.c
@@ -32,6 +32,7 @@
 /* #define MSDOS */
 #endif
 
+#include <errno.h>
 #include <stdio.h>
 #include "libpnmrw.h"
 
@@ -128,12 +129,6 @@ pm_freearray(char **its, int rows)
 static void
 pm_perror(char *reason)
 {
-#if defined(BSD4_4)
-    __const extern char *__const sys_errlist[];
-#else
-    extern char *sys_errlist[];
-#endif
-    extern int errno;
     char *e;
 
     e = sys_errlist[errno];