Why would you even need GLUT with CBuilder?
The GLUT libraries provide some basic functions for windowing, menus, and user input; they are very basic stuff.
C++ Builder makes it very easy to create windows and input way more advanced than GLUT.
I don’t recommend it, but that’s up to you. Alot of learning examples use GLUT but you can easily replace those parts with C++.
The only library you will probably need is GLU, which provides functions that make it easier define the cameras location and some other useful functions.
But even GLU is optional and eventually you may not even use it. GLU is not a very large library so it’s not a big problem to include it.
GLUT - manage window, OpenGL context, mouse, keyboard - this is exactly what you allready have under BCB
GLU - OpenGL utilities
GLAUX - some more helpful stuff
So, if you have a VCL window with a working OpenGL context and you can render to it then you don’t need GLUT.
If you want to compile your applications on Linux, or under Visual Studio (or some other compiler), then you should use GLUT instead of VCL (that means you only use Builder as compiler, but you don’t create any windows in it).