##### http://autoconf-archive.cryp.to/acx_check_dos_filesys.html
#
# SYNOPSIS
#
#   ACX_CHECK_DOS_FILESYS_LIMITATIONS
#
# DESCRIPTION
#
#   Check if the target is running on DOS. DOS doesn't allow a dot as
#   the first character, more than one dot, more than eight characters
#   before a dot, and just three letters after the dot. A DOS VM
#   running under Windows 9X does not have these restrictions. A DOS
#   program can be running in either environment, so its important to
#   code accordingly. Defines HAVE_DOS_FILESYS_LIMITATIONS if under
#   DOS.
#
#   Use in conjunction with ACX_CHECK_PATHNAME_STYLE_DOS.
#
# LAST MODIFICATION
#
#   2000-07-19
#
# COPYLEFT
#
#   Copyright (c) 2000 Mark Elbrecht <snowball3@bigfoot.com>
#
#   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 2 of the
#   License, or (at your option) any later version.
#
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#   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, write to the Free Software
#   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
#   02111-1307, USA.
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AC_DEFUN([ACX_CHECK_DOS_FILESYS_LIMITATIONS],
[AC_MSG_CHECKING(for potential DOS filename limitations)
AC_CACHE_VAL(acx_cv_dos_limitations,
[AC_REQUIRE([AC_CANONICAL_HOST])
acx_cv_dos_limitations="yes"
case ${host_os} in
  *dos | *djgpp) acx_cv_dos_limitations="yes"
esac
])
AC_MSG_RESULT($acx_cv_dos_limitations)
if test $acx_cv_dos_limitations = "yes"; then
  AC_DEFINE(HAVE_DOS_FILESYS_LIMITATIONS)
fi
])