RFR: 8288001: SOURCE_DATE_EPOCH should not be set by default

[KIRIYAMA Takuya]

On Tue, 14 Jun 2022 09:50:57 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

>> Thank you for your comments.
>> I understood the goal of reproducible build. But now, ENABLE_REPRODUCIBLE_BUILD is set to false in default configuration.
>> Then I think minimize the effort of SOURCE_DATE_EPOCH when reproducible build is disabled. I wonder why build time information is different from Windows and Linux.
>
> @tkiriyama I have created https://bugs.openjdk.org/browse/JDK-8288396 for the approach I championed above, i.e. to always build reproducible instead. As part of this, the `-Xinternalversion` time stamp should be of the same format for all platforms, given the same set of options to `configure`.
> 
> The associated PR is https://urldefense.com/v3/__https://github.com/openjdk/jdk/pull/9152__;!!ACWV5N9M2RV99hQ!P-ih1KOsqxjOgH-nLhQAe7l_x-qYC9MdAqnWBJMvuCAPBq_5RFQoQMLPMjvRCGZ83WhCSEDBwTuVgZl-EA$ . Can you verify if this solves your issues, and if so, close this bug?

@magicus Thank you for your action. I tried to build above PR branch, and I could get same build information between Windows and Linux
with ISO8601 format. I would close this PR.

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PR: https://git.openjdk.org/jdk/pull/9081