dnl This file is part of GNU mailutils.
dnl Copyright (C) 2003, 2007 Free Software Foundation, Inc.
dnl
dnl GNU Mailutils 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, or (at your option)
dnl any later version.
dnl 
dnl GNU Mailutils 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 along
dnl with GNU Mailutils; if not, write to the Free Software Foundation,
dnl Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
dnl
AC_DEFUN([MU_CHECK_GSASL],
[AC_CACHE_CHECK([whether to use GNU SASL library],
                 [mu_cv_lib_gsasl],
 [if test "x$mu_cv_lib_gsasl" = x; then
   cached=""
   mu_cv_lib_gsasl=no

   AC_ARG_WITH(gsasl,
     AC_HELP_STRING([--with-gsasl], [use libgsasl for SASL authentication]),
     [case $withval in
      yes|no) wantgsasl=$withval;;
      *) AC_MSG_ERROR([bad value for --with-gsasl: $withval]);;
      esac],
     [wantgsasl=no])

   if test $wantgsasl = yes; then
     AC_CHECK_HEADER(gsasl.h,
                     [:],
                     [wantgsasl=no])

     if test $wantgsasl != no; then
       save_LIBS=$LIBS
       AC_CHECK_LIB(gsasl, gsasl_init,
                    [mu_cv_lib_gsasl=-lgsasl],
                    [mu_cv_lib_gsasl=no])
       if test $mu_cv_lib_gsasl != no; then
         LIBS="$LIBS $mu_cv_lib_gsasl"
         AC_TRY_RUN([
#include <gsasl.h>

int
main()
{
  return gsasl_check_version ("$1") == (char*) 0;
}],
                    [:],
                    [mu_cv_lib_gsasl=no],
                    [mu_cv_lib_gsasl=no])
       fi
       LIBS=$save_LIBS
     fi       
   fi
  fi])
 if test $mu_cv_lib_gsasl != no; then
   GSASL_LIBS=$mu_cv_lib_gsasl
   ifelse([$2],,,[$2])
 fi])