WCHAR_MAX question

Artem B. Bityuckiy abityuckiy@yandex.ru
Wed May 5 19:38:00 GMT 2004

> I actually have a newer compiler: 3.4.0.  I could find no sign of the 
> --with-short-wchar configuration option in my sources.
> This really should be done by the compiler.  The macro has to be a 
> constant so it cannot use sizeof() or make a function call (ala errno).  
> Now, an end-user can always specify the -fshort-wchar option on a 
> compilation.  As you can see, this means that the macro should be 
> dynamically defined by the compiler.  The newest gcc compiler has 
> managed to do this right.
Ok, thanks for help.
> Even without the -fshort-wchar problem, calculating at configuration 
> time is going to be inaccurate.  For a cross-target, an execution test 
> would be required, but we can't do that when we are in the stages of 
> building the C library.  I guess we could check for the configuration 
> option and set a flag in newlib.h to handle the case you have mentioned.
Just to note, newer autoconf is able to determine constants like 
sizeof(wchar_t) without running test on target board!

Best Regards,
Artem B. Bityuckiy,
St.-Petersburg, Russia.

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