AC_CHECK_LIB(readline, rl_erase_empty_line,
[AC_DEFINE(HAVE_READLINE_4, 1)],
[AC_DEFINE(HAVE_READLINE_4, 0)])
+ AC_CHECK_LIB(readline, rl_free_undo_list,
+ [AC_DEFINE(HAVE_READLINE_4_2, 1)],
+ [AC_DEFINE(HAVE_READLINE_4_2, 0)])
else
AC_DEFINE(HAVE_READLINE_4, 0)
+ AC_DEFINE(HAVE_READLINE_4_2, 0)
fi
dnl ** check for math library