@newman: It pretty firmly expects to run on a Gentoo system.
That said, you could work-around that by checking out the Portage tree in the right place, and downloading the right sources, but that's probably a bit of a pain.
But technically, the only part that depends on a Gentoo system isn't the toolchain build, but the build of everything else, which you probably don't really care about anyway, since this is the stuff needed for all my packages (which reminds me, it pretty firmly expects a checkout of my personal dev tree, too
).
More to the point for you, the toolchain build itself isn't automated (because I need to monitor it in detail each time), cf. the beginning of the script.
Keep in mind that, for the K2/K3, the TC isn't an exact match to the target device, and will require hoop jumping (in the form of *FLAGS tweaks, mostly) to build stuff that even has a remote chance to run on the device. Again, that's heavily documented in the script.
On a sidenote, you really, really want to work from the snapshots though, the releases are nearly a year old.