u32_casecoll (const uint32_t *s1, size_t n1,
const uint32_t *s2, size_t n2,
const char *iso639_language, uninorm_t nf, int *resultp);
u32_casecoll (const uint32_t *s1, size_t n1,
const uint32_t *s2, size_t n2,
const char *iso639_language, uninorm_t nf, int *resultp);