Install SDL on Ubuntu 12.04

<code bash>
$ sudo apt-get install build-essential
$ sudo apt-get install libsdl1.2-dev
$ sudo apt-get install libsdl1.2debian
$ sudo apt-get install libsdl-ttf2.0-dev
$ sudo apt-get install libsdl-image1.2-dev
$ sudo apt-get install libsdl-mixer1.2-dev
</code>

build example file

<code bash>
$ g++ -o lesson27 lesson27.cpp -lSDL -lSDL_image
</code>