So there has been a lot of times where I needed to know what the enums returned by certain opengl operations are, to print them on the terminal to see what's going on.
It doesn't seem there's any kind of function available for stringifying the enums at the moment, so I'm thinking of going straight to gl.h (actually I'm gonna use libglew's header for now), grabbing the #defines and creating a huge switch table for convenience purposes.
Is there any better way, and how would you deal with having to port things to OpenGL ES?
gluErrorString is the function you're looking for in OpenGL, as GLU library is normally always available alongside with GL.
I don't have experience in OpenGL ES, but Google turned up GLUes that may help you.