cross compile

notes.sh

sudo apt install crossbuild-essential-armhf && sudo apt install crossbuild-essential-arm64

sudo dpkg --add-architecture arm64
sudo dpkg --add-architecture armhf   

sudo dpkg --print-foreign-architectures

-DCMAKE_C_COMPILER=arm-linux-gnueabihf-gcc -DCMAKE_CXX_COMPILER=arm-linux-gnueabihf-g++ 
-DCMAKE_CXX_FLAGS:STRING="-Wno-unused-variable -Wno-unused-parameter" -DCMAKE_C_FLAGS:STRING="-Wno-unused-variable -Wno-unused-parameter"

sudo apt-get remove --purge `dpkg --get-selections | grep i386 | awk '{print $1}'`

sudo apt install arm-linux-gnueabihf-gcc

# add to sources.list
deb [arch=arm64,armhf] http://ports.ubuntu.com/ubuntu-ports/ xenial main restricted
deb-src [arch=arm64,armhf] http://ports.ubuntu.com/ubuntu-ports/ xenial main restricted
deb [arch=arm64,armhf]  http://ports.ubuntu.com/ubuntu-ports/ xenial-updates main restricted
deb-src [arch=arm64,armhf] http://ports.ubuntu.com/ubuntu-ports/ xenial-updates main restricted
deb [arch=arm64,armhf]  http://ports.ubuntu.com/ubuntu-ports/ xenial universe
deb-src [arch=arm64,armhf] http://ports.ubuntu.com/ubuntu-ports/ xenial universe
deb [arch=arm64,armhf]  http://ports.ubuntu.com/ubuntu-ports/ xenial-updates universe
deb-src [arch=arm64,armhf] http://ports.ubuntu.com/ubuntu-ports/ xenial-updates universe
deb [arch=arm64,armhf]  http://ports.ubuntu.com/ubuntu-ports/ xenial multiverse
deb-src http://ports.ubuntu.com/ubuntu-ports/ xenial multiverse
deb http://ports.ubuntu.com/ubuntu-ports/ xenial-updates multiverse
deb-src http://ports.ubuntu.com/ubuntu-ports/ xenial-updates multiverse