Disable POWER9 with old gcc versions

driver/others/dynamic_power.c

@@ -3,7 +3,9 @@
 
 extern gotoblas_t gotoblas_POWER6;
 extern gotoblas_t gotoblas_POWER8;
+#if (!defined C_GCC) || (GCC_VERSION >= 60000)
 extern gotoblas_t gotoblas_POWER9;
+#endif
 
 extern void openblas_warning(int verbose, const char *msg);
 
@@ -19,7 +21,9 @@ static char *corename[] = {
 char *gotoblas_corename(void) {
 	if (gotoblas == &gotoblas_POWER6)	return corename[1];
 	if (gotoblas == &gotoblas_POWER8)	return corename[2];
+#if (!defined C_GCC) || (GCC_VERSION >= 60000)
 	if (gotoblas == &gotoblas_POWER9)	return corename[3];
+#endif
 	return corename[0];
 }
 
@@ -29,8 +33,10 @@ static gotoblas_t *get_coretype(void) {
 		return &gotoblas_POWER6;
 	if (__builtin_cpu_is("power8"))
 		return &gotoblas_POWER8;
+#if (!defined C_GCC) || (GCC_VERSION >= 60000)
 	if (__builtin_cpu_is("power9"))
 		return &gotoblas_POWER9;
+#endif
 	return NULL;
 }
 
@@ -53,7 +59,9 @@ static gotoblas_t *force_coretype(char * coretype) {
 	{
 	case  1: return (&gotoblas_POWER6);
 	case  2: return (&gotoblas_POWER8);
+#if (!defined C_GCC) || (GCC_VERSION >= 60000)
 	case  3: return (&gotoblas_POWER9);
+#endif
 	default: return NULL;
 	}
 	snprintf(message, 128, "Core not found: %s\n", coretype);