--- a/gcc/common/common-targhooks.c	Fri Oct 27 22:46:09 2017 +0900
+++ b/gcc/common/common-targhooks.c	Thu Oct 25 07:37:49 2018 +0900
@@ -1,5 +1,5 @@
 /* Default common target hook functions.
-   Copyright (C) 2003-2017 Free Software Foundation, Inc.
+   Copyright (C) 2003-2018 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -23,6 +23,7 @@
 #include "tm.h"
 #include "common/common-target.h"
 #include "common/common-targhooks.h"
+#include "opts.h"
 
 /* Determine the exception handling mechanism for the target.  */
 
@@ -77,6 +78,23 @@
   return true;
 }
 
+/* Default version of TARGET_GET_VALID_OPTION_VALUES.  */
+
+vec<const char *>
+default_get_valid_option_values (int, const char *)
+{
+  return vec<const char *> ();
+}
+
+/* Default version of TARGET_OPTION_VALIDATE_PARAM.  */
+
+bool
+default_option_validate_param (const int value ATTRIBUTE_UNUSED,
+			       const int param ATTRIBUTE_UNUSED)
+{
+  return true;
+}
+
 const struct default_options empty_optimization_table[] =
   {
     { OPT_LEVELS_NONE, 0, NULL, 0 }