dnl This file is part of GNU mailutils.
dnl Copyright (C) 2001, 2006, 2007 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, write to the Free Software Foundation,
dnl Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
dnl

dnl MU_RESULT_ACTIONS -- generate shell code for the result of a test
dnl   $1 -- CVAR  -- cache variable to check
dnl   $2 -- NAME  -- if not empty, used to generate a default value TRUE:
dnl                  `AC_DEFINE(HAVE_NAME)'
dnl   $2 -- TRUE  -- what to do if the CVAR is not `no'
dnl   $3 -- FALSE -- what to do otherwise; defaults to `:'
dnl
AC_DEFUN([MU_RESULT_ACTIONS], [
[if test "$$1" != "" -a "$$1" != no; then
  ]ifelse([$3], ,
          [AC_DEFINE(HAVE_]translit($2, [a-z ./<>], [A-Z___])[,1,[FIXME])],
          [$3])[
else
  ]ifelse([$4], , [:], [$4])[
fi]])dnl

AC_DEFUN([MU_CHECK_GUILE],
[
 if test "x$mu_cv_lib_guile" = x; then
   cached=""
   AC_PATH_PROG(GUILE_CONFIG, guile-config, no, $PATH)
   if test $GUILE_CONFIG = no; then
     mu_cv_lib_guile=no
   else
     GUILE_INCLUDES=`$GUILE_CONFIG compile`
     GUILE_LIBS=`$GUILE_CONFIG link`
   fi

   if test $GUILE_CONFIG != no; then
     AC_MSG_CHECKING(for guile version 1.4 or higher)
     GUILE_VERSION=`($GUILE_CONFIG --version 2>&1; echo '')|sed -n 's/guile-config [[^0-9]]* \([[0-9]][[0-9]]*\)\.\([[0-9]][[0-9]]*\).*/\1\2/p'`
     case "x$GUILE_VERSION" in
     x[[0-9]]*)
       if test $GUILE_VERSION -lt 14; then
         AC_MSG_RESULT(Nope. Version number too low.)
         mu_cv_lib_guile=no
       else
         AC_DEFINE_UNQUOTED(GUILE_VERSION, $GUILE_VERSION,
                            [Guile version number: MAX*10 + MIN])
         AC_MSG_RESULT(OK)
         save_LIBS=$LIBS
         save_CFLAGS=$CFLAGS
         LIBS="$LIBS $GUILE_LIBS"
         CFLAGS="$CFLAGS $GUILE_INCLUDES"
         AC_TRY_LINK([#include <libguile.h>],
                     ifelse([$1], , scm_shell(0, NULL);, [$1]),
                     [mu_cv_lib_guile=yes],
                     [mu_cv_lib_guile=no])
         LIBS=$save_LIBS
         CFLAGS=$save_CFLAGS
       fi ;;
     *) AC_MSG_RESULT(Nope. Unknown version number)
        mu_cv_lib_guile=no;;
     esac
   fi
 else
   cached=" (cached) "
   GUILE_INCLUDES=`$GUILE_CONFIG compile`
   GUILE_LIBS=`$GUILE_CONFIG link`
 fi
 AC_MSG_CHECKING(whether to build guile support)
 MU_RESULT_ACTIONS([mu_cv_lib_guile],[LIBGUILE],[$2],[$3])
 AC_MSG_RESULT(${cached}$mu_cv_lib_guile)
 if test $mu_cv_lib_guile = yes; then
    if test $GUILE_VERSION -gt 14; then
      LIBS="$LIBS $GUILE_LIBS"
      CFLAGS="$CFLAGS $GUILE_INCLUDES"
      AC_CHECK_FUNCS(scm_long2num scm_cell scm_list_1 scm_list_n scm_c_define\
                     scm_c_lookup)
      if test $ac_cv_func_scm_cell = no; then
         AC_MSG_CHECKING(for inline scm_cell)
         AC_TRY_LINK([#include <libguile.h>],
                     [scm_cell(SCM_EOL, SCM_EOL)],
                     [ac_cv_func_scm_cell=yes
                     AC_DEFINE(HAVE_SCM_CELL,1,
                               Define if you have scm_cell function)])
         AC_MSG_RESULT($ac_cv_func_scm_cell)
      fi
      CFLAGS=$save_CFLAGS
      LIBS=$save_LIBS
    fi
   AC_ARG_WITH([guiledir],
               AC_HELP_STRING([--with-guiledir=DIR],
                              [Specify the directory to install guile modules to]),
               [case $withval in
                /*) GUILE_SITE=$withval;;
                yes) GUILE_SITE=`$GUILE_CONFIG info pkgdatadir`/site;;
                *)  AC_MSG_ERROR([Argument to --with-guiledir must be an absolute directory name]);;
                esac],
               [GUILE_SITE=`$GUILE_CONFIG info pkgdatadir`/site
                pfx=$prefix 
                test "x$pfx" = xNONE && pfx=$ac_default_prefix
                case $GUILE_SITE in
                $pfx/*) ;; # OK
	        *) AC_MSG_WARN([guile site directory "$GUILE_SITE" lies outside your current prefix ($pfx).])
                   GUILE_SITE='$(pkgdatadir)/$(VERSION)/guile'
                   AC_MSG_WARN([Falling back to ${GUILE_SITE} instead. Use --with-guiledir to force using site directory.])
                   ;;
                esac])
 fi
 AC_SUBST(GUILE_SITE) 
 AC_SUBST(GUILE_INCLUDES)
 AC_SUBST(GUILE_LIBS)
])