[Debian-science-sagemath] Bug#835027: pari: please provide PARI 2.8.0[.alpha] in experimental

[Ximin Luo]

Bill Allombert:
> On Tue, Sep 06, 2016 at 06:31:28PM +0200, Samuel Lelièvre wrote:
>> I think PARI has a particular convention about even vs odd minor version
>> numbers,
>> so 2.7.x and 2.8.x don't work the same.
>>
>> See
>> http://pari.math.u-bordeaux.fr/faq.html#versioninfo
> 
> Exactly so. Old timers might remember that the Linux kernel used the
> opposite convention up to the release of Linux 2.6.0
> 
> What it mean for PARI is that all pari-2.7.x have the same ABI and
> sonames while the pari-2.6.x had different ABI and sonames.
> 
> The soname of pari 2.7.x is libpari-gmp-tls.so.4, the soname of 
> pari 2.9.x will be libpari-gmp-tls.so.5 but the soname of
> pari 2.8.x is libpari-gmp-tls-2.8.so.x (which depends on x).
> 
> So the package name 'libpari-gmp-tls4' is not appropriate for
> pari-2.8.x
> 

Understood, thank you both for the explanation. This also explains why we have to currently do this

https://anonscm.debian.org/cgit/debian-science/packages/sagemath.git/tree/debian/README.Debian#n6

to make the Sage docbuild work; it seems that they are still using pari-2.8 as if it had the same sonames and paths as pari-2.7.

Perhaps then a more long-term solution would be something like:

1. Ask pari upstream to fix installation paths so that pari-stable and pari-testing are co-installable.
2. Package pari-2.8.0 as its own Debian package.
3. Fix Sage's pari paths to point to the pari-testing paths.

Does this sound feasible to you?

(To be clear this is a longer term goal; I still think we should just Ignore This Problem in the meantime for debian-sagemath, for the reasons I mentioned earlier.)

X

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