Add "native" as a valid option value for -march= on aarch64 (PR driver/83193).

2018-02-21  Martin Liska  <mliska@suse.cz>

	PR driver/83193
	* config/aarch64/aarch64.c (aarch64_print_hint_for_core_or_arch):
	Add "native" as a possible value.
	* config/aarch64/aarch64.h (HAVE_LOCAL_CPU_DETECT):  Define
	the macro when native cpu detection is available.

From-SVN: r257874

gcc/ChangeLog

 2018-02-21  Martin Liska  <mliska@suse.cz>
 
 	PR driver/83193
+	* config/aarch64/aarch64.c (aarch64_print_hint_for_core_or_arch):
+	Add "native" as a possible value.
+	* config/aarch64/aarch64.h (HAVE_LOCAL_CPU_DETECT):  Define
+	the macro when native cpu detection is available.
+
+2018-02-21  Martin Liska  <mliska@suse.cz>
+
+	PR driver/83193
 	* common/config/arm/arm-common.c (arm_print_hint_for_arch_option):
 	Add "native" as a possible value.
 	* config/arm/arm.h (HAVE_LOCAL_CPU_DETECT): Define the macro

gcc/config/aarch64/aarch64.c

@@ -10628,6 +10628,13 @@ aarch64_print_hint_for_core_or_arch (const char *str, bool arch)
   const struct processor *entry = arch ? all_architectures : all_cores;
   for (; entry->name != NULL; entry++)
     candidates.safe_push (entry->name);
+
+#ifdef HAVE_LOCAL_CPU_DETECT
+  /* Add also "native" as possible value.  */
+  if (arch)
+    candidates.safe_push ("native");
+#endif
+
   char *s;
   const char *hint = candidates_list_and_hint (str, s, candidates);
   if (hint)

gcc/config/aarch64/aarch64.h

@@ -1002,6 +1002,7 @@ extern const char *aarch64_rewrite_mcpu (int argc, const char **argv);
 
 #if defined(__aarch64__)
 extern const char *host_detect_local_cpu (int argc, const char **argv);
+#define HAVE_LOCAL_CPU_DETECT
 # define EXTRA_SPEC_FUNCTIONS						\
   { "local_cpu_detect", host_detect_local_cpu },			\
   MCPU_TO_MARCH_SPEC_FUNCTIONS