[U-Boot] [U-Boot, v2] Reproducible U-Boot build support, using SOURCE_DATE_EPOCH

[Bin Meng]

Hi,

On Tue, Jul 28, 2015 at 11:00 PM, Tom Rini <trini at konsulko.com> wrote:
> On Sun, Jul 26, 2015 at 06:48:15PM +0200, Paul Kocialkowski wrote:
>
>> In order to achieve reproducible builds in U-Boot, timestamps that are defined
>> at build-time have to be somewhat eliminated. The SOURCE_DATE_EPOCH environment
>> variable allows setting a fixed value for those timestamps.
>>
>> Simply by setting SOURCE_DATE_EPOCH to a fixed value, a number of targets can be
>> built reproducibly. This is the case for e.g. sunxi devices.
>>
>> However, some other devices might need some more tweaks, especially regarding
>> the image generation tools.
>>
>> Signed-off-by: Paul Kocialkowski <contact at paulk.fr>
>
> Applied to u-boot/master, thanks!
>
> --

This commit breaks the following commit:

commit f3f431a712729a1af94d01bd1bfde17a252ff02c
Author: Chris Packham <judge.packham at gmail.com>
Date:   Sun May 10 21:02:09 2015 +1200

    Makefile: Add U_BOOT_TZ and include in version

    Define U_BOOT_TZ alongside U_BOOT_TIME and U_BOOT_DATE and use it to
    include the timezone in the version output.

    Acked-by: Simon Glass <sjg at chromium.org>
    Signed-off-by: Chris Packham <judge.packham at gmail.com>

Before this commit I have:
U-Boot 2015.07-00345-g9c57487 (Jul 31 2015 - 10:49:31 +0800)

After this commit I have:
U-Boot 2015.07-00346-gf3f431a (Jul 31 2015 - 02:50:54 +0000)

As you see: the timezone information is missing, and U-Boot's
timestamp is now GMT+0 (the correct one should be GMT+8)

Is this intended behavior? Or if not, please fix it.

Regards,
Bin