# install it into ...
ROOT_INSTALL_DIR="${HOME}/ROOT/v6-06-06"
rm -rf ${ROOT_INSTALL_DIR}
mkdir -p ${ROOT_INSTALL_DIR}
# download, unpack and build it in /tmp
cd /tmp
rm -rf root-build root-6.06.06 root_v6.06.06.source.tar.gz*
wget https://root.cern.ch/download/root_v6.06.06.source.tar.gz
tar -zxf root_v6.06.06.source.tar.gz
mkdir root-build
cd root-build
unset ROOTSYS
cmake -DCMAKE_BUILD_TYPE="Debug" -DCMAKE_INSTALL_PREFIX="${ROOT_INSTALL_DIR}" -Dall="ON" -Dgeocad="ON" -Dbuiltin_ftgl="OFF" -Dbuiltin_glew="OFF" -Dsoversion="ON" ../root-6.06.06
make
cmake --build . --target install
# final cleanup
cd ../
#rm -rf root-build root-6.06.06 root_v6.06.06.source.tar.gz*