Jan Beulich <[email protected]> writes:
> This makes the resulting diagnostics quite a bit more useful.
>
> Signed-off-by: Jan Beulich <[email protected]>
Nice. I'm a bit disappointed we can't just treat _Static_assert() as
void, like:
#define BUILD_BUG_ON_ZERO(e) (_Static_assert(!(e), "!(" #e ")"), 0)
> @@ -54,6 +61,15 @@ struct pt_regs;
> */
> #ifndef __OPTIMIZE__
> #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
> +#elif __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
> +#define __build_bug_on_failed(n) __build_bug_on_##n##_failed
> +#define _BUILD_BUG_ON(n, condition) \
> + do { \
> + extern void __compiletime_error(#condition) \
> + __build_bug_on_failed(n)(void); \
> + if (condition) __build_bug_on_failed(n)(); \
> + } while(0)
> +#define BUILD_BUG_ON(condition...) _BUILD_BUG_ON(__COUNTER__, ##condition)
> #else
> extern int __build_bug_on_failed;
> #define BUILD_BUG_ON(condition) \
Why does this depend on gcc version? Looks like residue from an attempt
to use _Static_assert here?
Thanks,
Rusty.
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