[aur-general] the *scotch* issue

Michele Mocciola mimocciola at yahoo.com
Wed Feb 18 23:01:33 UTC 2015

scotch_esmumps5 is a legacy version, necessary to avoid compatibility issue between mumps and first version of scotch (6.0.0). For my part it can be safely removed from AUR.I would remove scotch_esmumps5 from provides of scotch, just because it doesn't provides version 5 of scotch.


     On Saturday, February 14, 2015 6:53 PM, George Eleftheriou <eleftg at gmail.com> wrote:

 ===================================to: mickele, myles, jedbrown as packagers/maintainers of the various AUR scotch flavours

cc: winstonwu9, gucong, kragacles, john_schaf, SMucalo as packagers / maintainers of various other packages depending on these AUR *scotch*===================================

The other day, i needed to build ptscotch-openmpi and realized that it conflicts with scotch_esmumps5...

loading packages...
resolving dependencies...
looking for conflicting packages...
:: ptscotch-openmpi and scotch_esmumps5 are in conflict. Remove scotch_esmumps5? [y/N] y
error: failed to prepare transaction (could not satisfy dependencies)
:: mumps: requires scotch_esmumps5

... but i couldn't remove scotch_esmumps5 since i have mumps installed on my system so... i did a quick search:
and realized that there are 5 (!) different versions of *scotch* in AUR. Then, i decided to do something about it.

1) Visited the upstream scotch website where i came across this interesting piece of information (copying from the Release Notes and Changelog of upstream 6.0.1):

"While this is technically a bugfix release, much has changed "under the hood" regarding repartitioning and (re)partitioning with fixed vertices. From now on, there is no separate "*_esmumps" version. The additional libraries for MUMPS can be generated by running "make esmumps" for the sequential libraries and "make ptesmumps" for the parallel libraries."

2) Took bits and pieces from the already existing PKGBUILDs, cleaned them up and made my own scotch PKGBUILD which grabs the latest sources (6.0.3) and encompasses all kinds of scotch that could ever be needed by AUR packages (serial + pt + esmumps + ptesmumps).

3) Uninstalled the scotch version I already had (scotch_esmumps5).
4) Installed my new "unified" scotch.

5) Built 2 AUR packages (openfoam and mumps) which depend on conflicting scotch versions by replacing the [pt]scotch[-openmpi][_esmumps5] dependency in their PKGBUILD with my new "unified" scotch. Just to test whether they compile or they give errors. Everything worked.

Suggestions/questions to all:

1) Would you mind checking my PKGBUILD (first attempt to make one but there is nothing quite new inside anyway... it's based on the existing ones) for errors? Any improvements to propose?

2) Then, if everything is OK, do you agree in merging all AUR *scotch* into a single one in order to make life simpler?

3) the above also implies that the packages depending on *scotch*  will have to change their dependencies' listings... I already attached the modified PKGBUILDS of openfoam and mumps, as samples.


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