# -*- Autoconf -*-
# Checks required to run `subpipe'.
#
-# Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+# Copyright (C) 2002-2003, 2005, 2009-2011 Free Software Foundation,
+# Inc.
#
-# This program is free software; you can redistribute it and/or modify
+# 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
-# the Free Software Foundation; either version 2 of the License, or
+# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-# 02111-1307 USA
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
# Written by Paul Eggert <eggert@twinsun.com>.
AC_DEFUN([BISON_PREREQ_SUBPIPE],
[
AC_TYPE_PID_T
- AC_CHECK_HEADERS([fcntl.h])
AC_HEADER_SYS_WAIT
AC_CHECK_FUNCS(dup2 waitpid)
AC_FUNC_FORK