[Buildroot] Few questions external toolchain

[Marco Trapanese]

Hello,
after reading the documentation I still have some questions.
I want to use a Linaro toolchain for an imx6 board.

The toolchain is hosted on a git repository, and I don't understand how 
to tell this to buildroot. It seems it looks for a tar.gz file.

Anyway I tried to manually git clone the toolchain and I passed the 
directory of the local repo.
When it tries to compile something it returns:

checking for arm-buildroot-linux-gnueabi-gcc... 
/home/marco/dev/buildroot/output/host/usr/bin/arm-fsl-linux-gnueabi-gcc
checking whether the C compiler works... no
configure: error: in 
`/home/marco/dev/buildroot/output/build/alsa-lib-1.0.26':

the path is correct, but why it looks for 
"arm-buildroot-linux-gnueabi-gcc"? It seems the internal toolchain!

Attached there is my .config file and the buildroot version is: 2014.02-rc2

Thanks!
Marco


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