Re: [ptxdist] Why are the __DATE__ and __TIME__ fixed in the OSELAS Toolchain or PTXDist ?

[Alexander Dahl <post@lespocky.de>]

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Hello Mircea,

On Wed, Jul 21, 2021 at 04:08:30PM +0200, Mircea Ciocan wrote:
> 
> On 21.07.21 15:36, Alexander Dahl wrote:
> > The reason is so called reproducible builds:
> > 
> > https://reproducible-builds.org/
> > 
> > You can change behaviour in your BSP through the
> > REPRODUCIBLE_TIMESTAMP_* variables. Access it from the menu through
> > "Project Name & Version" ---> "SOURCE_DATE_EPOCH timestamps source"
> > 
> > Greets
> > Alex
> > 
> Thanks a lot Alex,
> 
> I was starting to tear what little hair I have left, of course it had to be
> some google sponsored useless garbage :-(, oh well, at least is disable-able
> ;-).

Maybe you judged only after a quick glance? I would not call it
useless. See https://wiki.debian.org/ReproducibleBuilds/About on
motivation for it for example. As a user concerned about integrity of
the software I'm running, this approach is desirable. 

As a developer eventually shipping firmware built by a ptxdist based
BSP, I'm also interested in reproducible build artefacts.

You might not need it for your usecases, other people would disagree,
thus calling it garbage … well … I would not do that.

> Best way is to run:
> 
> ./ptxdist setup -> "Developer Options" -> "disable reproducible builds"
> 
> and get rid of it, the following gem is from the "feature" help, I think it
> describes it nicely why is junk:
> 
>  "This can be confusing during development. E.g. The Linux kernel build
> timestamp never changes and cannot be used to ensure that the correct kernel
> image is used. Enable this option to get a new timestamp for every PTXdist
> call."

Junk, garbage, see above.

With kind greetings
Alex

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