Hi all, I have a use case where you get and post and item to a queue via it's sequence number so code like this: int64_t seq = seq_next (queue); /* get next free place */ struct item *item = queue_get (queue, seq); /* get the item at place 'seq' */ item->a = 1; /* we just fill in dummy data for the example */ item->b = 2; queue_publish (queue, seq); /* publish place 'seq' as containing data */ Now the issue here is that since 'item' is never referenced by any function, GCC, falsely sees item as being an unused variable. So far AFAIK only a warning is issued and that can be ignored, but at one time in the future I fear that the optimizer will kick in here and simply remove where we fill item with data. So does there exist a proper way to tell GCC that this is a false positive? The only attribute I could find is (unused) which silences the warning but ofc will only further tell GCC that the variable really is unused. Honestly this feels like a need for there being a (used) attribute to inform the compiler that yes this variable is indeed used even though it doesn't detect it. Regards, Henrik Holst
