What base image that torch lib builds on for linux package

I am wondering how torch lib is built, especially which OS is used for build package for linux platform to make it most widely compatible with users’ linux distribution.

This is also about what the minimum versions of glibc, gcc and other basic dependencies are.

Build upon docker image such as ubi8, ubuntu 20.04 to support various linux distributions?

The current CPU and CUDA binaries should use CentOS7 as the base as seen here.