+.Fo wcsxfrm
+.Fa "wchar_t *restrict ws1"
+.Fa "const wchar_t *restrict ws2"
+.Fa "size_t n"
+.Fc
+.In wchar.h
+.In xlocale.h
+.Ft size_t
+.Fo wcsxfrm_l
+.Fa "wchar_t *restrict ws1"
+.Fa "const wchar_t *restrict ws2"
+.Fa "size_t n"
+.Fa "locale_t loc"
+.Fc