cub is not bundled with CUDA 8.0. It is not bundled with any version of CUDA.
Portions of CUB are contained within the version of thrust that is included with recent versions of CUDA. However this is not a standalone version of CUB that can be used by:
The portions of cub included are only intended to be used via thrust. Not by themselves.
If you want to use cub, you need to install it first.
The use of
is not documented anywhere and is not a workable attempt to get access to cub.
In fact, you should never include something via such a path in thrust. header files at that level of depth/nesting in thrust are not designed to be used directly in user code. User code that attempts to do so may break from one CUDA version to the next, due to changes in thrust implementation.