char32_t
size_t c32rtomb(char * __restrict, char32_t, mbstate_t * __restrict);
size_t mbrtoc32(char32_t * __restrict, const char * __restrict, size_t,
size_t c32rtomb_l(char * __restrict, char32_t, mbstate_t * __restrict,
size_t mbrtoc32_l(char32_t * __restrict, const char * __restrict, size_t,
#define charXX_t char32_t
#define charXX_t char32_t