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1 # -*- Autoconf -*-
2 # Checks required to run `subpipe'.
3 #
4 # Copyright (C) 2002-2003, 2005, 2009-2010 Free Software Foundation,
5 # Inc.
6 #
7 # This program is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
11 #
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
16 #
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
19
20 # Written by Paul Eggert <eggert@twinsun.com>.
21
22 AC_DEFUN([BISON_PREREQ_SUBPIPE],
23 [
24 AC_TYPE_PID_T
25 AC_HEADER_SYS_WAIT
26 AC_CHECK_FUNCS(dup2 waitpid)
27 AC_FUNC_FORK
28 ])