dnl This file is part of GNU mailutils.
dnl Copyright (C) 2001 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 2 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, write to the Free Software
dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
dnl

dnl MU_ENABLE_SUPPORT(feature, [action-if-true], [action-if-false])

AC_DEFUN([MU_ENABLE_SUPPORT], [
	pushdef([mu_upcase],translit($1,[a-z],[A-Z]))
	pushdef([mu_build_files],mu_upcase[_BUILD_FILES])
	pushdef([mu_cache_var],[mu_cv_enable_]$1)
	AC_SUBST(mu_build_files)
	ifelse([$2],,,AC_SUBST(mu_build_dirs))
	AC_ARG_ENABLE($1, 
	 [  --disable-]$1[          disable ]$1[ support],
	 [case "${enableval}" in
		yes) mu_cache_var=yes;;
                no)  mu_cache_var=no;;
	        *)   AC_MSG_ERROR(bad value ${enableval} for --disable-$1) ;;
          esac],
         [mu_cache_var=yes])

	if test x"[$]mu_cache_var" = x"yes"; then
		AC_DEFINE([ENABLE_]mu_upcase,1,[Define this if you enable $1 support])
		mu_build_files='[$(]mu_upcase[_FILES)]'
		ifelse([$2],,,$2)
	ifelse([$3],,,else
                $2)
	fi

	popdef([mu_upcase])
	popdef([mu_build_files])
	popdef([mu_cache_var])
])