Add "native" as a valid option value for -mcpu/-mtune= on arm (PR driver/83193).

2018-02-22  Martin Liska  <mliska@suse.cz>

	PR driver/83193
	* common/config/arm/arm-common.c (arm_print_hint_for_cpu_option):
	Add "native" as a possible value.

From-SVN: r257900

gcc/ChangeLog

 2018-02-22  Martin Liska  <mliska@suse.cz>
 
 	PR driver/83193
+	* common/config/arm/arm-common.c (arm_print_hint_for_cpu_option):
+	Add "native" as a possible value.
+
+2018-02-22  Martin Liska  <mliska@suse.cz>
+
+	PR driver/83193
 	* config/i386/i386.c (ix86_option_override_internal):
 	Add "native" as a possible value for -march and -mtune.
 

gcc/common/config/arm/arm-common.c

@@ -309,6 +309,12 @@ arm_print_hint_for_cpu_option (const char *target,
   auto_vec<const char*> candidates;
   for (; list->common.name != NULL; list++)
     candidates.safe_push (list->common.name);
+
+#ifdef HAVE_LOCAL_CPU_DETECT
+  /* Add also "native" as possible value.  */
+  candidates.safe_push ("native");
+#endif
+
   char *s;
   const char *hint = candidates_list_and_hint (target, s, candidates);
   if (hint)