-# unistd-safer.m4 serial 2
-dnl Copyright (C) 2002 Free Software Foundation, Inc.
+#serial 9
+dnl Copyright (C) 2002, 2005-2006, 2009-2013 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_UNISTD_SAFER],
[
- gl_PREREQ_DUP_SAFER
-])
-
-# Prerequisites of lib/dup-safer.c.
-AC_DEFUN([gl_PREREQ_DUP_SAFER], [
- AC_CHECK_HEADERS_ONCE(fcntl.h unistd.h)
+ AC_CHECK_FUNCS_ONCE([pipe])
])