You want the dev libraries (atleast i assume those are the ones you want as we're on a game dev board):

http://packages.ubun...libgl1-mesa-dev

If you're running ubuntu or debian you should use the package manager instead, or do sudo apt-get install libgl1-mesa-dev from the commandline. (downloading stuff using the browser is quite an odd way to do things in Linux, by using the package manager you get the appropriate version for your OS without hassle)

(downloading stuff using the browser is quite an odd way to do things in Linux, by using the package manager you get the appropriate version for your OS without hassle)

QFT.

Always look for a given piece of software in the package manager, before you look elsewhere. Not only is the installation process much simplified, but the version in the package manager often has lots of distro-specific tweaks.

For example, the OpenGL libraries from your package manager are typically the only way to obtain a hardware-accelerated OpenGL.