There is a website about this.

https://reproducible-builds.org/docs/source-date-epoch/

Regards,
Ronald.




Van: Tatsuki Makino <[email protected]>
Datum: dinsdag, 11 november 2025 10:17
Aan: Charlie Li <[email protected]>, cen <[email protected]>, 
[email protected]
Onderwerp: Re: Reproducible builds of ports

Ah, I see, so it was a topic in that direction :)

ELF format itself doesn't, by default, include information such as the 
compilation timestamp, maybe.
Even code that uses preprocessor __DATE__ and __TIME__ won't be reproducible 
unless we stop the clock, maybe.

At the very least, we can't make the parts involving such times match 
perfectly, can we? :)

Regards.

On 2025/11/11 4:53, Charlie Li wrote:
> cen wrote:
>> The goal is bit-for-bit reproducibility, "functionally" is not enough.
>>
> This is completely impossible for any operating system package distribution. 
"Functionally" is the best you can get.
>
> Consider that Python ports built under some CPython (ie Python from python 
dot org) almost always




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