How to install root in /usr/local?

Hi,
I built succesfully root on my ubuntu 16.04.
Now, I want install root in /usr/local folder.
What are folder I must copy? bin, etc, doc, include, man and lib? Or there is some other folder?

See root.cern.ch/building-root

cmake -Dgnuinstall=ON [other options] <sources>
make -j N          # N is number of cores
sudo make install  # since the default CMAKE_INSTALL_PREFIX is /usr/local