In the framework of the previous question.
Now my part of the zoo for assembly and debugging looks like this: two pieces of iron under Debian / Mint (32, 64), inside stand under VirtualBox FreeBSD, SuSE (as representatives of tarballs, RPM, and other features). And the old XP32 overlooked there. With Windows last dealt about 10 years ago. But now, it seems, will have to. Tasks - mostly "silent" code in C (low-middle level libraries), some quits on Qt.
What to put in order to maintain / debug the code in a compatible form? As far as I understand, unfortunate 32-bit XP in the modern world can be thrown out long ago. Or is it going to live there and in later versions?
PS By "what to put" means not only the OS, but also tools. In any case, the main development is under Linux, and a great temptation to plug in some MinGW in Windows. But I'm afraid this is not the option.
PPS Edge of the ear heard, what else OS X want, finally can be hung up?