it's a bit weird since it mentions a private function from the c library i'm interfacing but also giving the line of a compiler builtin:
```rs
            pub extern "aapcs" fn $alias( $($argname: $ty),* ) $(-> $ret)? {
                super::$name($($argname),*)
            }
```
I'm guessing maybe the C function tries calling the LLVM builtin and crashes due to incompatibility ?