[tz] How to force zic output to TZIF?

Arthur David Olson arthurdavidolson at gmail.com
Tue Apr 3 17:46:16 UTC 2018

TZIF2 added 64-bit data to the end of TZIF files; TZIF3 added POSIX-style
future-use strings to the end of TZIF2 files. In an ideal world, an
application expecting original TZIF-format files simply ignores the
trailing data.


On Tue, Apr 3, 2018 at 1:41 PM, Johan Kohler <johan.kohler at gmail.com> wrote:

> Hi,
> I have a tz client that expects the tzdata in format TZIF (that's version
> \nul).  It has become necessary to update the tzdata but it is not feasible
> to update the client.
> Is it possible with the current 2018d release to generate output in TZIF
> format (as opposed to TZIF2 or TZIF3)?  If so, what needs to be modified?
> If not, what is the suggested approach?
> Thanks,
> Johan
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