only support append_history if readline has it
diff --git a/configure b/configure
index 4247a78..44a7477 100755
--- a/configure
+++ b/configure
@@ -14529,6 +14529,49 @@
fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for append_history in -lreadline" >&5
+$as_echo_n "checking for append_history in -lreadline... " >&6; }
+if ${ac_cv_lib_readline_append_history+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ ac_check_lib_save_LIBS=$LIBS
+LIBS="-lreadline $READLINE_LIBS $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+/* Override any GCC internal prototype to avoid an error.
+ Use char because int might match the return type of a GCC
+ builtin and then its argument prototype would still apply. */
+#ifdef __cplusplus
+extern "C"
+#endif
+char append_history ();
+int
+main ()
+{
+return append_history ();
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ ac_cv_lib_readline_append_history=yes
+else
+ ac_cv_lib_readline_append_history=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_readline_append_history" >&5
+$as_echo "$ac_cv_lib_readline_append_history" >&6; }
+if test "x$ac_cv_lib_readline_append_history" = xyes; then :
+
+$as_echo "#define HAVE_RL_APPEND_HISTORY 1" >>confdefs.h
+
+fi
+
+
# End of readline checks: restore LIBS
LIBS=$LIBS_no_readline