There is some document there, but takes time for me to find it. besides, the build command change compared with the 26compat branch

# install some requirement

sudo yum install boost boost-devel gcc-c++ scons -y

git clone

# checkout the legacy branch, legacy branch is the recommended for 3.0
cd mongo-cxx-driver
git checkout legacy
sudo scons --sharedclient --prefix=/usr/local install
sudo ldconfig