**** This post is irrelevant as of 8/16/2014
FWIM - Lubuntu 14.04.01 x64: So I was following this guide and things were going well until I encountered an error running the toolchain build script for the x64 linux host. The script would abort because it claimed that it could not find a c++ compiler. Looking back at the instructions, I replaced the step about installing arm-linux-gnueabihf with:
$sudo apt-get install git build-essential gcc-arm-linux-gnueabi libncurses5-dev u-boot-tools qemu-user-static debootstrap binfmt-support libusb-dev pkg-config gcc-arm-linux-gnueabihf
Not sure why I did not have the correct c++ compiler but it ended up downloading a LOT of files. Looks like the build went through without the error after doing this. If I had to guess (what follows is uninformed speculation) it is the pkg-config that was the win. I also has to uncomment the download commands in the script to make progress (I think - the above was after the uncomment)
I will post an update when I can get a "hello world" cross compile to execute.