Skip Montanaro wrote: > So, is wchar.h part of the ANSI C standard or is Apple's GCC setup (Mac OS X > 10.2.8, gcc 3.3) in error? wchar.h is not part of ISO C 89 (and thus not of ANSI C). It was added to ISO C in Addendum 1 (1994), and is part of ISO C 99. Regards, Martin