I get the point reg. verifying the Windows-Compiling-Build, but wouldn't the same verification on an open source platform allow for even easier (maybe even auto

I get the point reg. verifying the Windows-Compiling-Build, but wouldn't the same verification on an open source platform allow for even easier (maybe even automatic) verification? How about an vmware/vbox image setup explicitly for that purpose? Not feasible for windows due to licencing issues, i guess. Also, huge kudos for the effort going into this work. Thanks!