$NetBSD: patch-au,v 1.4 2013/05/22 07:44:04 sbd Exp $

--- src/include/cpstd.h.orig	1993-04-14 19:57:42.000000000 +0000
+++ src/include/cpstd.h
@@ -50,7 +50,9 @@ extern char *tildexpand();
 extern char *printnum();
 extern int cp_numdgt;
 extern void fatal();
+#if !defined(__DragonFly__) && !defined(__NetBSD__) && !defined(__OpenBSD__) && !defined(__FreeBSD__) && !defined(__sun) && !defined(__linux__)
 extern void setenv();
+#endif
 extern void cp_printword();
 
 /* Externs from wlist.c */