Linaro currently mostly works on Ubuntu as its guideline. Here is some tips, not so much, for working on Fedora with Linaro
Follow this https://wiki.linaro.org/Platform/Android/Toolchain if you're working with Android
or a build from scratch https://wiki.linaro.org/WorkingGroups/ToolChain/Using/GCCNative
Or this https://wiki.linaro.org/WorkingGroups/ToolChain/Using/CrosstoolNg if you want a stand-alone toolchain that can be worked on other platform
Then you can use the toolchain to build the kernel, rootfs i.e. http://www.linaro.org/linaro-blog/2011/09/15/building-a-linaro-android-build-from-source/
Why don't we integrate it into Yocto or buildroot? Hmmm...
BTW, the linaro-image-tools didn't work with Python 2.5 ;-(