Does this patch fix your problem?
2008-03-29 Paul Eggert <[EMAIL PROTECTED]>
* lib/wchar.in.h [defined __need_mbstate_t]: Just include wchar.h
in this case. Problem reported by Erik Benada.
diff --git a/lib/wchar.in.h b/lib/wchar.in.h
index 924a338..d7a1b5d 100644
--- a/lib/wchar.in.h
+++ b/lib/wchar.in.h
@@ -26,6 +26,14 @@
* the declaration of wcwidth().
*/
+#ifdef __need_mbstate_t
+/* Special invocation convention inside glibc header files. */
+
[EMAIL PROTECTED]@ @NEXT_WCHAR_H@
+
+#else
+/* Normal invocation convention. */
+
#ifndef _GL_WCHAR_H
/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
@@ -80,3 +88,4 @@ extern int wcwidth (int /* actually wchar_t */);
#endif /* _GL_WCHAR_H */
#endif /* _GL_WCHAR_H */
+#endif
