The other difference is I'm using gcc on 32bit OS, but I have 64-bit processor

Getting proper quad and 64-bit int support for that particular mix is largely "unchartered waters", afaik. I believe it should be do-able (and do-able also with a 32-bit processor), but I know how to achieve it only with a 64-bit compiler and a 64-bit processor.
As you've discovered, there's a bit more involved than just getting %Config to report what you want it to.

Cheers,
Rob