A similiar (less descriptive) post is here.
I\'m trying to roll my own tool chain using recent releases on Ubuntu and was hoping there was enough of a Linux communit
If you're really want to build entire toolchain for yourself:
http://frank.harvard.edu/~coldwell/toolchain/
http://ftp.snapgear.org/pub/snapgear/tools/arm-linux/build-arm-linux-3.4.4
Take in mind, though, as you should search for toolchain compatibilty matrix or you may run into weird compilation errors.
If you still have the option for crosstool-ng, this is what I'm was working on for last few days:
http://blog.stranadurakov.com/2009/08/04/how-to-arm-linux/
Here you will find my crosstool-ng configuration file, which had worked for me.