1.x behavior.

*   `CUDNN_INSTALL_PATH`, `TENSORRT_INSTALL_PATH`, `NCCL_INSTALL_PATH`,
    `NCCL_HDR_PATH` are deprecated. Use `TF_CUDA_PATHS` instead which supports a
    comma-separated list of base paths that are searched to find CUDA libraries
    and headers.

Refer to our
[public project status tracker](https://github.com/orgs/tensorflow/projects/4)
and