[vtkusers] VTK on AMD64 / x86_64

[THOMPSON,DAVID C.]

> The new build of VTK (with VTK_USE_RENDERING=OFF) built fine and didn't
> require me to jump through any hoops. It had some warnings but they 
> seemed to be the same as in the builds whose logs I have posted.
> 'make Experimental' passes all 48 tests.
> Good to know it works, but I'll need the renderer unfortunately.
It sounds like you aren't passing the 64-bit versions of libraries.
Did you point the GL_GL_LIBRARY and X11_X11_LIBRARY variables to
the versions in /usr/lib64 and /usr/X11R6/lib64, respectively?

        David