pytorch

f58f7b78 - add distributed backend options in setup.py (#53214)

add distributed backend options in setup.py (#53214) Summary: Currently there's only one indicator for build_ext regarding distributed backend `USE_DISTRIBUTED`. However one can build with selective backends. adding the 3 distributed backend option in setup.py Pull Request resolved: https://github.com/pytorch/pytorch/pull/53214 Test Plan: Set the 3 options in environment and locally ran `python setup.py build_ext` Reviewed By: janeyx99 Differential Revision: D26818259 Pulled By: walterddr fbshipit-source-id: 688e8f83383d10ce23ee1f019be33557ce5cce07