[arch-general] scipy package - is there anything important that stops the update to 0.9?

[Ángel Velásquez]

2011/4/22 Andrzej Giniewicz <gginiu at gmail.com>:
> Hi,
>
>> The main issue now is linking to lapack, which fails. There is a
>> symlink hack (you can refer to the python3- PKGBUILD in AUR), but we
>> do not know why and how (this works). Without that hack, SciPy should
>> not be choosy about linking to static or dynamic lapack libs, but in
>> this case it builds only if a static lapack is present. The reason for
>> the stall in releasing an update is basically waiting to sort out this
>> behaviour. Otherwise, it's good to go.
>
> I think I know what this is about, i.e. iirc it was bug in Numpy. In
> Python 3.2 because of PEP 3149 (
> http://www.python.org/dev/peps/pep-3149/ ) all .so files are prefixed
> with SOABI name, i.e. cpython-32 in that case. It was made so compiled
> files by multiple python versions could coexist. Python itself uses
> sysconfig to determine the name:
>
>>>> sysconfig.get_config_var('SO')
> '.cpython-32mu.so'
>>>> sysconfig.get_config_var('SOABI')
> 'cpython-32mu'
>
> the problem is that it's use is aimed for internal python use, not
> external libraries. Numpy used sysconfig.get_config_var('SO') - the
> internel python extension name, for external libraries. This is fixed
> for Numpy 1.6, when they instead check if there is SOABI and if yes,
> they remove it from SO to get previous behaviour. This is actually
> affecting numpy and scipy and probably others, because that use
> distutils of numpy. The patch is attached to ticket:
>
> http://projects.scipy.org/numpy/ticket/1749
>
> and was accepted upstream/merged and it seems to work.
>
> 2011/4/22 Ángel Velásquez <angvp at archlinux.org>:
>> Maybe you should try to build it by yourself first, before asking if
>> there is anything important that is stoping the release...
>
> tried and it worked, because I'm running prerelease of numpy 1.6 -
> sorry, I probably should downgrade numpy to 1.5.1 as in official
> package and test then, my bad, did not see that coming at first,
> before I started to dig, but I've seen no issues with scipy 0.9 or
> git, that's why I asked.
>
>> As Ray explained to you, to build this version, for now it have to be
>> hacked horribly, and isn't being possible, plus, I had on vacations,
>> and the unique person who helped me to see this behaviour by far have
>> been Ray, nobody from the community, not you btw who next time before
>> ask this kind of stuff you should contact first the maintainer.
>
> Sorry again. Though I better ask on list/start discussion when
> multiple people see that flow and can add to finally find solution,
> that's why lists are for, to talk, not? Especially for people who
> prefer lists before forums like myself, I like to keep the copy in my
> mailbox. I looked trough list and found nothing, checked forum and
> found one issue marked as solved which I wasn't able to reproduce - so
> I asked if there is something I don't know about and maybe help...
> Anyway next time I will contact peer to peer if this is preferred way,
> no problem, you have my word.
>
> Cheers,
> Andrzej.
>

No problem, feel free to talk to me on irc, I am just working on it :-)

-- 
Angel Velásquez
angvp @ irc.freenode.net
Arch Linux Developer / Trusted User
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http://www.angvp.com