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1# -*- Autoconf -*-
2# Checks required to run `subpipe'.
3#
4# Copyright (C) 2002, 2003, 2005 Free Software Foundation, Inc.
5#
6# This program is free software: you can redistribute it and/or modify
7# it under the terms of the GNU General Public License as published by
8# the Free Software Foundation, either version 3 of the License, or
9# (at your option) any later version.
10#
11# This program is distributed in the hope that it will be useful,
12# but WITHOUT ANY WARRANTY; without even the implied warranty of
13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14# GNU General Public License for more details.
15#
16# You should have received a copy of the GNU General Public License
17# along with this program. If not, see <http://www.gnu.org/licenses/>.
18
19# Written by Paul Eggert <eggert@twinsun.com>.
20
21AC_DEFUN([BISON_PREREQ_SUBPIPE],
22[
23 AC_TYPE_PID_T
24 AC_HEADER_SYS_WAIT
25 AC_CHECK_FUNCS(dup2 waitpid)
26 AC_FUNC_FORK
27])