Re: [PATCH v4 0/2] MR5915: include: Tweak atexit and cpuid declarations.

[Jacek Caban (＠jacek)]

Jacek Caban (@jacek) commented about include/msvcrt/intrin.h:
> extern "C" {
>  #endif
>
> +#ifndef __has_builtin
> +# define __has_builtin(x) 0
> +#endif
> -
>
> #if defined(__i386__) || (defined(__x86_64__) && !defined(__arm64ec__))
> -
>
> +#if defined(_MSC_VER) && (!defined(__has_builtin) || __has_builtin(__cpuidex))

Similar to !6502, it may be enabled on mingw with `-fms-extensions`. Something like `__has_builtin(__cpuidex) || (defined(_MSC_VER) && !defined(__clang__))` would be more accurate.