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CMakelists: remove build user/hostname #1122
Thanks, it's pushed on master.
There is reproducibility, and there is traceability. For example if you buy some food in the store, for a tin of pringles or whatever it should always taste the same, and the tin will always look the same; they can reproduce it. But on the tin will be printed the exact date and time of manufacture and information such as which factory and even production line did it... if there is a problem they can trace back where it came from. It's traceability.
For a distro where you build everything at once you might have other ways like CI to find out where and when it was build, and it's a priority to guarantee there were no changes from source inserted in there. For other cases like embedded where the rootfs and updates are composed from separate builders, traceability is also valuable.