Fixed and pushed, but even now I get the error:

```
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [hashpump] Error 1
```

(This doesn’t seem related to Homebrew or any of this code – I have the same issue when cloning the upstream repo and making the same changes in the makefile.)