m4/subpipe.m4

   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 ])