#undef iswdigit
#define iswdigit(a) (((unsigned)(a)-L'0') < 10)
+#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
+ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
+
+int iswalnum_l(wint_t, locale_t);
+int iswalpha_l(wint_t, locale_t);
+int iswblank_l(wint_t, locale_t);
+int iswcntrl_l(wint_t, locale_t);
+int iswdigit_l(wint_t, locale_t);
+int iswgraph_l(wint_t, locale_t);
+int iswlower_l(wint_t, locale_t);
+int iswprint_l(wint_t, locale_t);
+int iswpunct_l(wint_t, locale_t);
+int iswspace_l(wint_t, locale_t);
+int iswupper_l(wint_t, locale_t);
+int iswxdigit_l(wint_t, locale_t);
+int iswctype_l(wint_t, wctype_t, locale_t);
+wint_t towlower_l(wint_t, locale_t);
+wint_t towupper_l(wint_t, locale_t);
+wint_t towctrans_l(wint_t, wctrans_t, locale_t);
+wctrans_t wctrans_l(const char *, locale_t);
+wctype_t wctype_l(const char *, locale_t);
+
+#endif
+
#ifdef __cplusplus
}
#endif