Commits
François Saint-Jacques authored and Kouhei Sutou committed 5035027d2e9
ARROW-4696: Better CUDA detection in release verification script - Use a combination of `nvidia-smi` and `nvcc` to detect if cuda is installed and there is a least one physical gpu. - Re-use `ARROW_CUDA` variable internally to limit divergence between what cmake expects. Author: François Saint-Jacques <fsaintjacques@gmail.com> Closes #3774 from fsaintjacques/ARROW-4696-release-verify-detect-cuda and squashes the following commits: 744ea400 <François Saint-Jacques> Address review comments 2c8ea69c <François Saint-Jacques> ARROW-4696: Better CUDA detection in release verification script