Well, I can't explain how, but apparently a few files inside of the previously released sqlrelay source code got gzipped. Specifically config.guess and config.sub. This led to configure not working, and general impossibility compiling things. I just repackaged everything again, double-checked it prior to upload, and double-checked the download. All appears to be well at the moment. If you had trouble building SQL Relay from source, please re-download and try again.