SDK and Build Demo Code

Download the SDK into the home directory /home/ubuntu, and unzip it:
$tar xzf sysroot.tgz
download Demo Code and put into home directory too. The final file directory will look like:
Before we build the demo code, we need to install 'cmake':
$sudo apt install cmake
Build the demo code:
$cd demo/build
$./ arm-linux-gnueabihf-
$make && make install