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1 # -*- Autoconf -*-
2 # Checks required to run `subpipe'.
3 #
4 # Copyright (C) 2002, 2003, 2005, 2009 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
21 AC_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 ])