Windows is most likely not that much of a problem. Mac is ok too as long as you keep in mind that only OSX.3+ is supported (the page mentions .2 but 1.18+ haven't been compileable on it anymore due to some newer xcode bindings)
Linux is Linux ... don't expect it to work especially if GUI is involved ... Too much "configurability" and even more user own hack in possibilities or just too few standardized components that are available on any installation.
Linux is Linux ... don't expect it to work especially if GUI is involved ... Too much "configurability" and even more user own hack in possibilities or just too few standardized components that are available on any installation.