Cuda Toolkit v10-2-10.2.89 on Fedora31 missing libcu++ ; refers to Tegra development

I’ve installed cuda toolkit from Things work for the most part. The docs installed at /usr/local/cuda-10.2/doc say v10.2.89, last updated October 23, 2019, and the release notes say “NVIDIA CUDA Tegra Toolkit Release Notes for Development”. The docs at , also for v10.2.89 say last updated November 28, 2019, and “NVIDIA CUDA Toolkit Release Notes”, with NO mention of Tegra! Another notable difference is the mention of libcu++ (CUDA Standard C++ Library) in the online release notes. NO such library can be found in my installation. Also “Tegra” development seems to be supported only on Ubuntu. Do I need to install from a different rpm?