Detailed tutorial on installing Protobuf 3 on Ubuntu

When to install

If you use the protoc command and encounter Protoc not found, it means it is not installed. Or, if an error occurs during execution: This parser only recognizes "proto2", it means it is not version 3.0.

Installation process and possible problems

Installation Instructions

For detailed introduction, please refer to this article: A brief introduction to protobuf and installation in Ubuntu 16.04 environment

Execute the following commands in sequence to download the source code, compile and install it. It takes a long time, more than 10 minutes.

sudo apt-get install autoconf automake libtool curl make g++ unzip
git clone https://github.com/google/protobuf.git
cd protobuf
git submodule update --init --recursive
./autogen.sh
./configure
make
make check
sudo make install
sudo ldconfig # refresh shared library cache.

Possible problems

It is very likely that the following error message will appear during execution:

./autogen.sh: 4: ./autogen.sh: autoreconf: not found

Solution: Execute the following command.

sudo apt-get install autoconf
sudo apt-get install automake
sudo apt-get install libtool

After the installation is complete

Run the following command to verify the installation result and view the version number.

protoc --version

Congratulations on getting libprotoc 3.9.0 or higher.

Summarize

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