installing google protobuf, cpp and python

install_google_protobuf.sh

# To build protobuf from source, the following tools are needed:
sudo apt-get install autoconf automake libtool curl make g++ unzip
#download cpp 
wget https://github.com/protocolbuffers/protobuf/releases/download/v3.5.0/protobuf-cpp-3.5.0.tar.gz
#unpack them 
sudo tar xzf protobuf-cpp-3.5.0.tar.gz
cd protobuf-3.5.0
sudo ./configure
sudo make
sudo make check
#the output should be like:
#============================================================================
#Testsuite summary for Protocol Buffers 3.5.0
#============================================================================
# TOTAL: 7
# PASS:  7
# SKIP:  0
# XFAIL: 0
# FAIL:  0
# XPASS: 0
# ERROR: 0

sudo make install
# refresh shared library cache
sudo ldconfig