_real_bindtextdomain_u
res = _real_bindtextdomain_u(domain, binding, TP_BINDING);
res = _real_bindtextdomain_u(domain, codeset, TP_CODESET);
extern char *_real_bindtextdomain_u(const char *, const char *, int);
cur_domain_binding = _real_bindtextdomain_u(cur_domain,
codeset = _real_bindtextdomain_u(domain, NULL, TP_CODESET);