aph@xxxxxxxxxx said: > Please read the actual standard too. The rules about pointer type > conversions are at 6.3.2.3. The appropriate paragraphs are paragraphs > 1 and 7. So according to paragraph 1, the following is legal (obviously, this is basic C): void *return_item (int *rc); ... item_t *item_p; int rc; item_p = return_item (&rc); but the case int return_item (void **item_p); ... item_t *item_p; int rc; rc = return_item ((void **)&item_p); is not legal since (void **) doesn't fall under the specification of paragraph 1, but will work fine as long as item_p is only ever dereferenced as an item_t? In other words, (void *) is convertible to any incomplete or object type, but (void **) is not, despite the fact that *(void **) is a (void *)? > (unless you cast it back to its original type first). This warning > should be interpreted as saying that your interfaces are badly designed, > and the correct way to avoid the warning is to redesign them in a way > where you do not need to cast between conflicting types. (Even if you Unfortunately I can't change the interfaces since they're used by legacy code. I'd just like to get rid of the warnings since if people get used to ignoring the warnings in this code then they are likely to miss other more important problems. -mato
