giuliomoro Hope that that is gcc 6.3
AndyCap (4.4.59 kernel, 2.3 glibc, linaro-6.3-2017.02)
There is a downloadable version for Linux with the same settings, older versions I tried and different gcc and glibc versions all had various problems, thats why I had to build the toolchain for OS X in the end (not a job that was fun).
I tried clang but Eclipse support for clang is laughably bad, it basically doesn't work! It seems there was a couple of community attempts to integrate it, then an official CDT release and then nothing, seems it was dropped really. I gave up trying to get it to work.
For the linux instructions I think it is best to get the user to download and install the matching linaro toolchain rather than relying on the distro.