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Hi hugo.

The problems you are having are less python related and more
system-building/cross-development issues, and this is the
wrong forum for hashing out this stuff out.

I recommend building a linux-from-scratch system
(http://www.linuxfromscratch.org/) on an ordinary PC to
learn how the insides of linux machine works and how to fix
things when they go wrong.

Good luck,
Dan.