> How I could compile boost for another arquitecture?
I know this is not the right way for cross-compile the boost libs, but it works (i have used it for boost-41)

cd to boost libraries and create software links there:

ln -s /opt/crosstools/bin/arm-linux-g++ g++

ln -s /opt/crosstools/bin/arm-linux-ar ar

ln -s /opt/crosstools/bin/arm-linux-ranlib ranlib

ln -s /opt/crosstools/bin/arm-linux-as as

ln -s /opt/crosstools/bin/arm-linux-ld ld

set your PATH

export PATH= ". :$PATH"

then build it (as it was for gcc)