Re: [gentoo-science] BLAS and LAPACK dependecy resolution

[Francois Bissey <fbissey@slingshot.co.nz>]

On 12/09/13 21:19, Markus Oehme wrote:
> Hi,
> 
> I did the following, which seems to have done the trick:
> 1. add the package.mask entries
> 2. merge eselect::science
> 3. remerge all libraries that come from the science overlay (everything from
>    'eix -I --in-overlay science')
> 4. remove /usr/lib/libblas.so (which was kept by preserve-libs)
>    that is actually do 'rm /usr/lib/libblas.so'
> 5. remerge lapack-reference (which provided /usr/lib/libblas.so)
> 6. remerge umfpack (which depended on /usr/lib/libblas.so)
> 
> In between 3. and 4. I tried 'emerge @preserved-rebuild' which did not
> improve the situation (i.e. the preserved /usr/lib/libblas.so was still used
> by the newly built packages).
> 
> Step 6 is probably collateral damage which is hard to formalize.
> 
>> [2 blas.mask <text/plain (base64)>]
> 
> The entry >=app-shells/bash-completion-2.1 should probably be added, since
> the newer versions require >=eselect-1.3.8 which is only available in the
> main tree.
> 

That is incorrect. You should sync the science overlay again as there is
a eselect-1.3.8-r100 in overlay.


> Once the mask file is available via overlay it would probably be nice to
> have the above steps documented. I would volunteer to write a short piece
> for the wiki (but afaik I'm not allowed to edit
> https://wiki.gentoo.org/wiki/Project:Science/Overlay so somebody else would
> have to add it).
> 
> 

Yes that would be nice. We know about cleaning up the links but it is
not documented anywhere and yes it leads to interesting problems.
A clean up script automating the process would be useful.

Francois