##### http://autoconf-archive.cryp.to/acltx_default_class.html
#
# SYNOPSIS
#
#   ACLTX_DEFAULT_CLASS([OTHER-DEFAULT-CLASS])
#
# DESCRIPTION
#
#   This class search for the first suitable class in book report
#   article and set defaultclass to this value If no one of this
#   classes are found, fail
#
# LAST MODIFICATION
#
#   2006-07-16
#
# COPYLEFT
#
#   Copyright (c) 2006 Boretti Mathieu <boretti@eig.unige.ch>
#
#   This library is free software; you can redistribute it and/or
#   modify it under the terms of the GNU Lesser General Public License
#   as published by the Free Software Foundation; either version 2.1 of
#   the License, or (at your option) any later version.
#
#   This library 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
#   Lesser General Public License for more details.
#
#   You should have received a copy of the GNU Lesser General Public
#   License along with this library; if not, write to the Free Software
#   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
#   02110-1301 USA

AC_DEFUN([ACLTX_DEFAULT_CLASS],[
    if test "$acltx_cv_latex_class_default" = "" ; then
        ACLTX_CLASSES([m4_ifval([$1],[$1,])book,report,article],defaultclass)
    fi
    AC_MSG_CHECKING([for a default class in m4_ifval([$1],[$1,])book,report,article])
    AC_CACHE_VAL(acltx_cv_latex_class_default,[
        acltx_cv_latex_class_default=$defaultclass;
    ])
    AC_MSG_RESULT($defaultclass)
    AC_SUBST(defaultclass)
    if test "$defaultclass" = "no" ; then
        AC_MSG_ERROR([Unable to locate a default class])
    fi
])