[Bug 207109] makefs includes a timestamp that prevents reproducible output

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=207109

            Bug ID: 207109
           Summary: makefs includes a timestamp that prevents reproducible
                    output
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bin
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: emaste at freebsd.org

To support reproducible builds of FreeBSD we need to be able to produce
byte-identical output from identical input for all files produced by the build.

makefs needs an option to control the timestamps emitted in its output, either
by allowing the user to set an explicit timestamp or allowing timestamps to be
set to the epoch or similar.

Related links:
https://wiki.freebsd.org/ReproducibleBuilds
https://reproducible-builds.org/
https://reproducible-builds.org/specs/source-date-epoch/

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