The OS X version has a 64-bit version. I would assume the Linux version has a 64-bit version. Why not Windows? The last posts I can find on the issue are from 2008. Their compiler wasn't 64-bit or ...
You’ve probably seen 32-bit and 64-bit options available whenever you download an app or install a game. Your PC might even have a sticker that says it has a 64-bit ...