Dear Pavel
i followed above link install codesourcery tool chain.
Can you also type "echo $ARCH" and then "echo $CROSS_COMPILE", what is the result? Can you also try with "make distclean" and "make" commands?
I got nothing after executed echo $ARCH and $CROSS_COMPILE.
make distclean and make are showing error message as "no rule to make target distclean" and similar for make
Regards
Balaji