Follow this [guide](http://wiki.emqbit.com/how%20to%20cross-compile%20for%20the%20arm)
    
    $ wget -c http://www.kegel.com/crosstool/crosstool-0.43.tar.gz
    $ tar -zxf crosstool-0.43.tar.gz
    $ cd crosstool-0.43
    $ sudo apt-get install patch bison 
    $ sudo apt-get install build-essential
    $ sudo apt-get install flex
    $ sudo apt-get install libreadline5-dev