See https://godbolt.org/z/bYb7a38dG https://godbolt.org/z/bYb7a38dG It's basically: long* and long long* (the pointer types) are not compatible, and uint64_t i

See https://godbolt.org/z/bYb7a38dG https://godbolt.org/z/bYb7a38dG It's basically: long* and long long* (the pointer types) are not compatible, and uint64_t is the "wrong" typedef on linux, or at least inconsistent with the way the intrinsics are defined.