MySQL2 gem won't install

Question

I have been trying to install Gitlab on my Ubuntu 12.04 server for a long time, and all goes well until I run bundle install.

It says it is unable to instal

Answer 1

I have used this solution for this problem in rails4: (Ubuntu 12.04)

    1) Install MySQL from symptic manager just type "mysql-server-5.5" 
    2) use following command and install 
       sudo apt-get install mysql-client libmysqlclient-dev