AC_CHECK_LIB(history, add_history, [LIBS="$LIBS -lhistory"])
if test "$ac_cv_lib_readline_readline" = "yes"; then
AC_CHECK_HEADERS(readline/readline.h readline/history.h)
AC_CHECK_LIB(history, add_history, [LIBS="$LIBS -lhistory"])
if test "$ac_cv_lib_readline_readline" = "yes"; then
AC_CHECK_HEADERS(readline/readline.h readline/history.h)