On: ISO C became unusable for operating systems develo...

[tlb]

You can't detect most UB at compile time. LLVM has a system to detect it a runtime. There is a significant performance penalty, but it can be useful during testing.

See https://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html

[astrange → tlb]

It’s not actually that significant compared to something like asan. You can ship software with ubsan enabled if you want to.