c32rtomb
size_t c32rtomb(char *__restrict, char32_t, mbstate_t *__restrict);
__weak_alias(c32rtomb,_c32rtomb)
c32rtomb(char *restrict s, char32_t c32, mbstate_t *restrict ps)
ATF_CHECK_EQ_MSG((n = c32rtomb(NULL, L'x', &ps)), 1, "n=%zu", n);
mbstate_t *restrict) __unused = &c32rtomb;