zig cc: undefined symbol: __ubsan_handle_add_overflow

[xzto]

Zig Version

0.12.0-dev.289+b642bb92e

Steps to Reproduce and Observed Behavior

// overflow.c
unsigned foo(unsigned a, unsigned b) {
    return a + b;
}

int main(void) {return 0;}

$ zig cc overflow.c -fsanitize=unsigned-integer-overflow

LLD Link... ld.lld: error: undefined symbol: __ubsan_handle_add_overflow
>>> referenced by overflow.c:2
>>>               /home/xzto/.cache/zig/o/f31c2c508be8c5b115df26da78214296/overflow.o:(foo)

It works if you replace zig cc with clang.

Expected Behavior

Successful compilation.

[rohlem]

I think the main tracking issue for UBSan is currently #5163 .

[alexrp]

ubsan-rt was added in Zig 0.14.0.