CODE EXAMPLE FOR SHELL

CMake: unsupported GNU version -- gcc versions later than 8 are not supported

sudo apt-get install gcc-8 g++-8 -y

sudo ln -s /usr/bin/gcc-8 /usr/bin/gcc
sudo ln -s /usr/bin/g++-8 /usr/bin/g++
sudo ln -s /usr/bin/gcc-8 /usr/bin/cc
sudo ln -s /usr/bin/g++-8 /usr/bin/c++