Rebuild source on trusted system and compare SHA256 signatures of the rebuilt binaries with the binaries on the machine.
If these fuckers are not stopped, they will turn America into the most ruthless communist dictatorship ever known to man.
If you read the PDF, it was hinting at "crooking" the compiler, so that it produces binary code that is not in the source.
If you don't use the very same, crooked compiler for rebuilding, the binaries will differ.