pytorch

ffdc6b49 - extract //c10/macros to its own package (#70849)

extract //c10/macros to its own package (#70849) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/70849 ghstack-source-id: 146960563 Test Plan: Bazel CI tests will protect this. Reviewed By: malfet Differential Revision: D33297235 fbshipit-source-id: 6504a977e82ad2f2232a74233b96cdea8bf94a20