From the GCC manual: Many options have long names starting with -f or with -W—for example, -fforce-mem, -fstrength-reduce, -Wformat and so on. Most of these have both positive and negative forms; the negative form of -ffoo would be -fno-foo. This manual documents only one of these two forms, whichever one is not the default. But … Read more
It looks like you can’t – see this bug report. (And this one, which is marked as a dupe of that one – it has an identical test case to yours.) Since it looks like the root-cause bug is almost 10 years old, it would seem it’s not an easy problem to solve. In fact, … Read more
You can’t. The manual for GCC 4.4.0 is only comprehensive for that version, but it does list all the possible warnings for 4.4.0. They’re not all on the page you link to though. For instance, some language-specific options are on the pages for C++ options or Objective-C options. To find them all, you’re better off … Read more
You are using a function for which the compiler has not seen a declaration (“prototype“) yet. For example: int main() { fun(2, “21”); /* The compiler has not seen the declaration. */ return 0; } int fun(int x, char *p) { /* … */ } You need to declare your function before main, like this, … Read more
However, I know some that some compilers will exit the boolean expression entirely if the first condition fails. Is this true with Java? Yes, that is known as Short-Circuit evaluation.Operators like && and || are operators that perform such operations. Or is the order of evaluation not guaranteed? No,the order of evaluation is guaranteed(from left … Read more
Since C++17 you can use the [[nodiscard]] attribute. Example: [[nodiscard]] int bar() { return 42; }
Yes, but you’ll likely get another warning. The standard way of doing this is: (void)iid;. Very technically, this could still load iid into a register and do nothing. Granted that’s extremely stupid on the compilers part (I doubt any would ever do that, if it does delete the compiler), but it’s a more serious issue … Read more
C-style for loop has been deprecated in Swift 3. You can continue using it for a while, but they will certainly disappear in the future. You can rewrite your loop to Swift’s style: for i in 0..<len { let length = UInt32 (letters.length) let rand = arc4random_uniform(length) randomString.appendFormat(“%C”, letters.characterAtIndex(Int(rand))) } Since you don’t use i … Read more
Be explicit – then the compiler won’t warn that you perhaps made a mistake. while ( (list = list->next) != NULL ) or while ( (list = list->next) ) Some day you’ll be glad the compiler told you, people do make that mistake 😉
You can suppress Incomplete Implementation warnings by adding #pragma clang diagnostic ignored “-Wincomplete-implementation” just above the @implementation Hope this helps EDIT After being told in the comments that this didn’t work for someone and finding out the reason was because it was a different warning they were getting I have done a bit of playing … Read more