Here is a collection of tools for use with uClinux/ARM.

There has been a lot of different toolchains used over the years. But here is the one I use for uClinux development on ARM platforms right now.

Get the arm binary tool chain. README and the source is here.
To install the these binaries, login as root and run "cd / ; tar xvjf arm-uclinuxeabi-tools-20160812.tar.gz".