Or you know, just turn off UB. I don't know why C still has this, it was useful when we had truly exotic architectures with sign bits &c, but these days it is doing way more harm than good.
You cannot “turn off UB”. The behaviour is undefined in the standard, and nothing the compiler can do will make it defined. There is a profound misunderstanding of what undefined behaviour is in a lot of the comments. It is not a compiler setting. The way to make it defined is to change the standard.
Right, UB is essential part of C and can't be turned off. But it's entirely possible to turn off integer overflow UB by compiling with -fno-strict-overflow, and you should use it.
