patch/m4/setmode.m4
2025-01-05 13:33:00 -08:00

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# Check for setmode, DOS style.
# Copyright 2001-2025 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
AC_DEFUN([AC_FUNC_SETMODE_DOS],
[AC_CHECK_HEADERS_ONCE([fcntl.h unistd.h])
AC_CACHE_CHECK([for DOS-style setmode],
[ac_cv_func_setmode_dos],
[AC_LINK_IFELSE([AC_LANG_PROGRAM(
[[#include <io.h>
#if HAVE_FCNTL_H
# include <fcntl.h>
#endif
#if HAVE_UNISTD_H
# include <unistd.h>
#endif]],
[int ret = setmode && setmode (1, O_BINARY);])],
[ac_cv_func_setmode_dos=yes],
[ac_cv_func_setmode_dos=no])])
if test $ac_cv_func_setmode_dos = yes; then
AC_DEFINE([HAVE_SETMODE_DOS], [1],
[Define to 1 if you have the DOS-style `setmode' function.])
fi])