Decent cross-compiler for Mac OS X targets

I'm developing an SDL application in C++, and some of my consumers have asked for a version that runs on Mac OS X. I am wondering if anyone knows of a good cross-compiler for Mac OS X targets, and maybe a Mac OS X emulator (maybe a virtual HDD for Virtual Box?) so that I can actually test it myself.The emulator is not 100% ne开发者_StackOverflowcessary though, as it's probably illegal and I can understand if nobody's willing.

I'm using a PC (Windows XP) for my host machine, and I don't have the funding to go and purchase a Mac, sadly.

The easiest, and most common, solution is the other way: use a Mac platform with Windows installed either as dual boot or in a virtual machine.

That way you will benefit of 100% of both worlds and never be bothered whenever a Mac system update is delivered.

Bonus: You can install Linux as well.