AC_DEFUN([LX_ENABLE_DOCS],

 [

   AC_ARG_ENABLE([docs],

 AS_HELP_STRING([--enable-docs@<:@=yes|no|full@:>@], [build the documentation (full enables internal documentation too) @<:@default=yes@:>@])

 AS_HELP_STRING([--disable-docs], [do not build the documentation]),

          [], [enable_docs=yes])

   AC_MSG_CHECKING([whether to build the documention])

   case "$enable_docs" in

     yes)

       DOXYGEN_INTERNAL_DOCS=NO

       AC_MSG_RESULT([yes])

       ;;

     full)

       DOXYGEN_INTERNAL_DOCS=YES

       AC_MSG_RESULT([full])

       ;;

     no)

       DOXYGEN_INTERNAL_DOCS=NO

       AC_MSG_RESULT([no])

       ;;

     *)

       AC_MSG_ERROR([bad value $enable_docs for option --enable-docs])

       ;;

   esac

   AC_SUBST(DOXYGEN_INTERNAL_DOCS)

   AM_CONDITIONAL([WANT_DOCS], [test x"$enable_docs" != x"no"])

 ])

 AC_DEFUN([LX_ENABLE_GUI],

 [

   AC_ARG_ENABLE([gui],

 AS_HELP_STRING([--enable-gui], [build the GUI])

 AS_HELP_STRING([--disable-gui], [do not build the GUI @<:@default@:>@]),

          [], [enable_gui=no])

   AC_MSG_CHECKING([whether to build the GUI])

   if test x"$enable_gui" != x"no"; then

       AC_MSG_RESULT([yes])

   else

       AC_MSG_RESULT([no])

   fi

   if test x"$enable_gui" != x"no"; then

     PKG_CHECK_MODULES([GTK], [libgnomecanvasmm-2.6 >= 2.6.0])

   fi

   AM_CONDITIONAL([WANT_GUI], [test x"$enable_gui" != x"no"])

 ])