[tz] Database and Code compatibility

[Arthur David Olson]

At least by design, old programs can handle current binary files. The
binary files include an old (32-bit) representation of the source files,
followed by a new (64-bit) representation. (Back at the start of the
project in the 1980s, time_t values were 32 bits; as they grew to 64 bits,
the binaries were expanded to cover the bigger time_t range. Old programs,
as well as 32-bit programs, ignore the 64-bit data.)

    @dashdashado

On Tue, Apr 28, 2015 at 5:19 AM, Thomas v. Karlsson <
thomas.v.karlsson at se.abb.com> wrote:

>  Hi,
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> I would like to know the compatibility constraints between the code and
> the datebase.
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> Is the code forward and backward compatible with the database binaries?
> I.e can code read older and newer version of database binaries?
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> Or do the code and the database need to be version sync with each other?
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> Thanks
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> Thomas Karlsson
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