+ below.
+ However, we don't want to #include <wchar.h> on all platforms because
+ - Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
+ <wchar.h>.
+ - BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before
+ <wchar.h>. */
+#if HAVE_DECL_MBSWIDTH_IN_WCHAR_H