"Manuel López-Ibáñez" <[EMAIL PROTECTED]> wrote:
> 2008/10/17 Bruno Haible <[EMAIL PROTECTED]>:
>> "#pragma GCC diagnostic" has a few limitations, which make it unusable to
>> resolve warnings like this one:
>>
>> Jim Meyering wrote in [1]:
>>> $ cat in.c
>>> int f (void) __attribute__ ((__warn_unused_result__));
>>> void g (void) { (void) f (); }
>>> $ gcc -Werror -c in.c
>>> cc1: warnings being treated as errors
>>> in.c: In function 'g':
>>> in.c:2: error: ignoring return value of 'f', declared with attribute
>>> warn_unused_result
...
> However, in this particular case, there is an easy workaround:
>
> int f (void) __attribute__ ((__warn_unused_result__));
> void g (void) { int i; i = f (); }
>
> This silences the warning and makes it obvious that you are doing
> something fishy.
Thanks, but I prefer to use the ignore_value function.
Adding a set-but-not-used variable might well provoke
a warning some day, if it doesn't already.
