Instructs the compiler to generate traps for signed arithmetic overflow on addition, subtraction, and multiplication operations.
Where an overflow is detected, an undefined instruction is inserted into the assembly code. In order for the overflow to get caught, an undefined instruction handler must be provided.
-ftrapv are used in a single command, the
furthest-right option overrides the other.
For example, here
armclang --target=aarch64-arm-none-eabi -fwrapv -c -ftrapv hello.c