I've downloaded Google's Chromecast toolchain, but the compiler it comes with is too old (gcc/g++ 4.5.3) for the software (which requires gcc/g++ 4.8 or newer) I wish to compile for the Chromecast.

What is the easiest way to get gcc/g++/etc. 4.8+ that will work with the Chromecast? Or will any ARMv7 cross compiler do?