Right, that is why I proposed people to use -Werror, even if that means you have to vet and fix third party code (which you should do anyway if you're depending

Right, that is why I proposed people to use -Werror, even if that means you have to vet and fix third party code (which you should do anyway if you're depending on it). Ideally you use other tools too. Apart from that, don't assume flags and static analyzers can save you. If you're building something security critical, you do not make any assumptions about the code you depend on. You don't assume it is in some class. You don't "don't know", you vet the code. Flags and analyzers, default or not, are at best going to save you from a small subset of problems. The code might still be completely backwards and insecure.