[bug #52462] Support reproducible builds by seeding hdtbl's RNG

[G. Branden Robinson]

URL:
  <http://savannah.gnu.org/bugs/?52462>

                 Summary: Support reproducible builds by seeding hdtbl's RNG
                 Project: GNU troff
            Submitted by: gbranden
            Submitted on: Mon 20 Nov 2017 02:34:29 AM UTC
                Category: Macro - others
                Severity: 1 - Wish
              Item Group: Wishlist
                  Status: In Progress
                 Privacy: Public
             Assigned to: gbranden
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None

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Details:

When A/Bing roff documents after a build to see what I broke with my changes,
I always have to ignore the numerous color changes caused by
contrib/hdtbl/examples/common.roff seeding its random number generator with
the current date/time and process ID.

Fortunately, the same file offers a seeding function.

Change the examples to seed the RNG, and explain why in a comment.




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