-# strsignal.m4 serial 3
+# strsignal.m4 serial 4
dnl Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
[AC_RUN_IFELSE(
[AC_LANG_PROGRAM(
[[#include <string.h>
+#include <unistd.h> /* NetBSD 5.0 declares it in wrong header. */
]],
[[char *s = strsignal (-1);
return !(s != (char *) 0 && s != (char *) -1);]])],