Zephyr除了官方的編譯工具，還有第三方工具 arm-none-eabi-gcc 。
This PPA is an alternative to toolchain released at https://launchpad.net/gcc-arm-embedded. The source codes for both are same. Currently supports Ubuntu 10.04/12.04/14.04/14.10 32 and 64 bit.
Detailed explanations to Launchpad PPA can be found at https://help.launchpad.net/Packaging/. That website explains how a PPA is set up and how to add existing PPA and install software from it.
Here are quick steps to install toolchain from this PPA on Ubuntu before 14.04:
Step1: Inside Ubuntu, open a terminal and input
"sudo add-apt-repository ppa:team-gcc-arm-embedded/ppa"
Step2: Continue to input
"sudo apt-get update"
Step3: Continue to input to install toolchain
"sudo apt-get install gcc-arm-embedded"
To remove installed toolchain, just input "sudo apt-get remove gnu-arm-embedded".
To update the toolchain, just repeat above step2 and step3.
If it reports error message of conflict to gcc-arm-none-eabi, which is likely if upgrading from 4.x to 5+, please uninstall it first with:
"sudo apt-get remove gcc-arm-none-eabi"
Questions should be asked at https://answers.launchpad.net/gcc-arm-embedded
Bug can be filed at https://bugs.launchpad.net/gcc-arm-embedded/+filebug. It is highly encouraged to ask question first before filing a bug.