[patch] ld: optimize vfinfo output slightly

Ian Lance Taylor iant@google.com
Tue Apr 3 05:12:00 GMT 2012


nick clifton <nickc@redhat.com> writes:

> Hi Mike,
>
>>>> 	if (fwrite (str, 1, len, fp) != len)	
>>>> 	  {
>>>> 	    /* Ignore.  */
>>>> 	  }
>>>
>>> Yes.  Although it would be simpler to just remove the whole if (...)
>>> statment block and just call fwrite without testing its return value.
>
>> the reason i didn't do that is it causes warnings since fwrite() is marked as
>> "warn on unused result"
>
> OK, how about:
>
>   (void) fwrite (str, 1, len, fp);

Doesn't work.  There is no clean way to avoid a warning/error on a
warn_unused_result function.  That is intentional.  The
warn_unused_result attribute was designed for functions like realloc,
for which the result must be used in a correct program.  It was not
designed for functions like fwrite, where a correct program can ignore
the result.

Ian



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