#prepare your machine f.e.: 64-bit Ubuntu 16.04 LTS would require:
#===================================================================
sudo dpkg --add-architecture i386
sudo apt-get update
sudo apt-get install -y autoconf bc binfmt-support device-tree-compiler g++-4.9-arm-linux-gnueabihf gcc-4.9-arm-linux-gnueabihf git lib32ncurses5-dev lib32stdc++6 lib32z1 libtool make mercurial multistrap qemu qemu-user-static wget xz-utils


# get the repository:
#====================
git clone https://github.com/Beckhoff/CX9020.git
cd CX9020/

# link gcc-5-arm as default arm compiler
#=======================================
sudo ln -s /usr/bin/arm-linux-gnueabihf-gcc-4.9 /usr/bin/arm-linux-gnueabihf-gcc
sudo ln -s /usr/bin/arm-linux-gnueabihf-g++-4.9 /usr/bin/arm-linux-gnueabihf-gcc

#get and patch the u-boot sources:
#=================================
./tools/prepare_uboot.sh v2017.07

#build u-boot:
#=============
make uboot

#get and patch a rt kernel:
#==========================
./tools/prepare_kernel.sh v4.9.35-rt25

#configure and build the kernel:
#===============================
make kernel

#get and patch etherlab (optional):
#==================================
./tools/prepare_etherlab.sh

#configure and build the etherlab (optional):
#============================================
make etherlab

#prepare sdcard with a small debian rootfs:
#============================================
#BE CAREFUL to specify the correct device name,
#or you might end up deleting your host's root partition!
./scripts/install.sh /dev/sdc /tmp/rootfs

#install etherlab (optional):
#=============================
./scripts/52_install_etherlab.sh /tmp/rootfs