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"])

])