[RFC v3 2/4] string: Add streq,memeq,wcseq,wmemeq,strcaseeq[_l],wcscaseeq[_l] APIs

[Paul Eggert]

On 2025-09-03 03:05, Alejandro Colomar wrote:
> +static __always_inline __bool
> +(streq) (const char *__s1, const char *__s2)
> +{
> +  return strcmp(__s1, __s2) == 0;
> +}

Although this works for GCC it's wrong for C compilers where 
__always_inline expands to just 'inline' (or to nothing for pre-C99). 
Such a streq cannot be called from an extern inline function, due to the 
unfortunate constraint in ISO C23 §6.7.5 ¶2 which says extern inline 
functions cannot refer to identifiers with static linkage.

Standard functions like streq must be callable from extern inline functions.