|  | dnl Copyright (C) 1997-2025 Free Software Foundation, Inc. | 
|  | dnl | 
|  | dnl This program is free software; you can redistribute it and/or modify | 
|  | dnl it under the terms of the GNU General Public License as published by | 
|  | dnl the Free Software Foundation; either version 3 of the License, or | 
|  | dnl (at your option) any later version. | 
|  | dnl | 
|  | dnl This program is distributed in the hope that it will be useful, | 
|  | dnl but WITHOUT ANY WARRANTY; without even the implied warranty of | 
|  | dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the | 
|  | dnl GNU General Public License for more details. | 
|  | dnl | 
|  | dnl You should have received a copy of the GNU General Public License | 
|  | dnl along with this program.  If not, see <http://www.gnu.org/licenses/>. | 
|  | dnl | 
|  | dnl --enable-sim-stdio is for users of the simulator | 
|  | dnl It determines if IO from the program is routed through STDIO (buffered) | 
|  | AC_DEFUN([SIM_AC_OPTION_STDIO], | 
|  | [dnl | 
|  | AC_MSG_CHECKING([for sim stdio debug behavior]) | 
|  | sim_stdio="0" | 
|  | AC_ARG_ENABLE(sim-stdio, | 
|  | [AS_HELP_STRING([--enable-sim-stdio], | 
|  | [Specify whether to use stdio for console input/output])], | 
|  | [case "${enableval}" in | 
|  | yes)	sim_stdio="DO_USE_STDIO";; | 
|  | no)	sim_stdio="DONT_USE_STDIO";; | 
|  | *)	AC_MSG_ERROR([Unknown value $enableval passed to --enable-sim-stdio]);; | 
|  | esac])dnl | 
|  | AC_DEFINE_UNQUOTED([WITH_STDIO], [$sim_stdio], [How to route I/O]) | 
|  | AC_MSG_RESULT($sim_stdio) | 
|  | ]) |