DOC: Building libtorch using CMake (#44196)
Summary:
I am adding documentation for building the C++-only libtorch.so without invoking Python in the build and install process. This works on my Ubuntu 20.04 system and is designed to be operating system agnostic.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/44196
Reviewed By: zou3519
Differential Revision: D24421066
Pulled By: malfet
fbshipit-source-id: e77c222703353ff7f7383fb88f7bce705f88b7bf
