Hi,

I'm on a Ubuntu (essentially Debian) linux system.  What non-ruby
packages do I need to install to satisfy the dependencies for the Ruby
OpenGL extension?

It's looking for the libraries gl, glu, and glut.  I installed glut,
but I'm not sure what package would give me the gl and glu libraries. 
Some of the Mesa libraries are installed, so I would've thought that
those would satisify the dependencies, but apparently not.

Thanks,
Joe