m4/subpipe.m4

   1 # -*- Autoconf -*-
   2 # Checks required to run `subpipe'.
   3 #
   4 # Copyright (C) 2002-2003, 2005, 2009-2011 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 ])