Alexandre Julliard (@julliard) commented about include/msvcrt/intrin.h:
#endif
#if defined(__i386__) || (defined(__x86_64__) && !defined(__arm64ec__))
+#if defined(_MSC_VER) && (!defined(__has_builtin) || __has_builtin(__cpuidex))
You can't use __has_builtin if it's not defined.