/* Setting environment variables.
- Copyright (C) 2001-2003 Free Software Foundation, Inc.
+ Copyright (C) 2001-2004 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#endif
-#if !HAVE_UNSETENV
+#if HAVE_UNSETENV
+
+# if VOID_UNSETENV
+/* On some systems, unsetenv() returns void.
+ This is the case for FreeBSD 4.8, NetBSD 1.6, OpenBSD 3.4. */
+# define unsetenv(name) ((unsetenv)(name), 0)
+# endif
+
+#else
/* Remove the variable NAME from the environment. */
extern int unsetenv (const char *name);