py/gc: Only use no_sanitize_address attribute for GCC 4.8 and above.
It's not supported on older GCC versions.
@@ -350,7 +350,7 @@ void gc_collect_start(void) {
// Address sanitizer needs to know that the access to ptrs[i] must always be
// considered OK, even if it's a load from an address that would normally be
// prohibited (due to being undefined, in a red zone, etc).
-#ifdef __GNUC__
+#if defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8))
__attribute__((no_sanitize_address))
#endif
static void *gc_get_ptr(void **ptrs, int i) {
