Re: Flock CFP: Language SIGs discussion

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On 7/13/23 11:52, Demi Marie Obenour wrote:
> On 7/13/23 11:32, Fabio Valentini wrote:
>> On Thu, Jul 13, 2023 at 5:25 PM Demi Marie Obenour
>> <demiobenour@xxxxxxxxx> wrote:
>>>
>>> On 7/5/23 02:22, Jens-Ulrik Petersen wrote:
>>>> I have submitted a Flock proposal to have a common discussion session for
>>>> (modern) Language SIGs. I think for this to be successful we need
>>>> representatives from various Language SIGs to be there (Rust, Haskell,
>>>> OCaml, Golang and of course Python and older ecosystems like Perl, R, TeX
>>>> come to mind immediately - surely there are more). Language packaging
>>>> experts are also welcome of course independently or affiliated to one or
>>>> more language SIGs. Of course I also hope there will be broad attendance by
>>>> interested contributors.
>>>>
>>>> The idea is to talk about common and distinct problems faced, both to learn
>>>> from each other and to come up with practical ideas and plans for generally
>>>> easing Fedora's mass packaging efforts.
>>>>
>>>> If you plan to be at Flock and are willing and able to represent your
>>>> Language SIG at this Flock session do please reply or reach out to me. I
>>>> think each SIG could do a brief presentation there to kick off the dialogue.
>>>>
>>>> Thanks, Jens
>>>
>>> This could be made much easier if Fedora’s build system supported automated
>>> cascading rebuilds of transitive dependencies.  Haskell and OCaml are currently
>>> linked statically in Fedora, but could be linked dynamically if cascading
>>> rebuilds were supported.  Rust is likely, IMO, gain improved support for dynamic
>>> linking in the future.
>>>
>>> I am _not_ going to start a debate as to whether requiring cascading rebuilds
>>> is a good idea.  That requirement comes from Haskell, OCaml, and Rust, not me,
>>> and so any complaints should be directed there.  This subthread is strictly
>>> about changes to Fedora’s build system that make it easier to implement
>>> cascading rebuilds.
>>
>> I'm not sure how often I have to repeat myself, but dynamic linking
>> for Rust crates is NOT GOING TO HAPPEN. Even if the build system
>> supported doing this, the average number of updates for Rust crates I
>> push every week would keep the build system busy for a month, not even
>> mentioning the fact that it would blow up package sizes exponentially
>> (yes, *exponentially*, by about a factor of 2^n, with the number n of
>> optional features they support). Please stop mentioning Rust in this
>> context, it is misleading.
>>
>> Fabio
> 
> Why is static linking any better?  I’m not suggesting building the
> Cartesian product of all possible build configurations.  That would be
> absurd.  From my perspective it looks like static linking actually
> requires _more_ effort from the builders: they must build everything
> for each application that uses it instead of just building it once.
> Also if Rust winds up being a significant fraction of the overall system,
> the storage requirements of statically linking everything that uses Rust
> will be a serious problem.

Is what I am missing that the builders cannot handle rebuilding all
of the transitive dependencies whenever a new version of a Rust crate
comes out?  If so, that means that Fedora is shipping binaries built
from old versions of Rust crates.
-- 
Sincerely,
Demi Marie Obenour (she/her/hers)
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