Install Protobuf 2.5
Install protobufs from source. If you try to use a newer version, you'll run into an error related to kEmptyString
.
sudo apt-get install autoconf automake libtool curl make g++ unzip
wget https://github.com/google/protobuf/archive/v2.5.0.tar.gz
tar -zxvf v2.5.0.tar.gz
cd protobuf-2.5.0/