wcsxfrm
dlength = wcsxfrm(NULL, buffer, 0) + 1;
(void) wcsxfrm(L->l_raw_collate.wp, buffer, dlength);
dlength = wcsxfrm(NULL, compose, (size_t)0);
ret = (ssize_t)wcsxfrm(L->l_collate.wp + coll_offset, compose,
extern size_t wcsxfrm(wchar_t *_RESTRICT_KYWD, const wchar_t *_RESTRICT_KYWD,
using std::wcsxfrm;
return (wcsxfrm(s1, s2, n));