[PATCH v3 01/10] eal: add workaround for __builtin_constant_p

[Stephen Hemminger]

On Wed, 19 Feb 2025 18:01:30 -0800
Andre Muezerie <andremue at linux.microsoft.com> wrote:

>  
>  #ifdef RTE_TOOLCHAIN_MSVC
> -#define __rte_constant(e) 0
> +#define __rte_constant(e) _Generic((1 ? (void *) ((e) * 0ll) : (int *) 0), int * : 1, void * : 0)
>  #else
>  #define __rte_constant(e) __extension__(__builtin_constant_p(e))
>  #endif

Probably worth some explanation as to what is going on.