NULL

[Artem B. Bityuckiy]

Ahmed Masud wrote:
> Artem B. Bityuckiy wrote:
> 
>>
>> Hello
>>
>> I've found than there is no "standard" place for NULL in Newlib. NULL 
>> is defined in stdio.h, stdlib.h, locale.h, time.h, wchar.h and in a 
>> variety of internal .c files. In all cases there are
>>
>> #ifndef NULL
>> #define NULL
>> #endif
>>
>> in these files. What is the reason of such many NULL definition? I 
>> need NULL for internal use when I'm changing Newlib. And I've also 
>> defined one more version of NULL. May be it is better to add NULL 
>> definition to somewhere like sys/_types.h ?
> 
> 
> May be desirable to actually put it in stdio.h; or in its own file 
> null.h. In addition NULL should be defined as:
> 
> #ifndef NULL
> #define NULL ((void *)0)
> #endif
> 
> Not as a blank.
> 
> Cheers,
> 
> Ahmed
> 
> 
> 
Of course, NULL isn't the blank, I wanted to write

#ifndef NULL
#define NULL 0
#endif

NULL is defined in GCC's stddef.h.
Sorry for silly question.

Best Regards,
Artem