Bug#961725: libopenblas-dev: On some cpus, openmp and pthread dead-lock

[Sébastien Villemot]

Control: tags -1 + patch

Hi Graham,

Le samedi 30 mai 2020 à 15:09 +0200, Graham Inggs a écrit :

> I was able to reproduce this in Ubuntu 20.04 on i7-2600 with the
>     Rscript -e "example(solve)"
> test case.  Rebuilding with
>     export DEB_LDFLAGS_MAINT_STRIP="-Wl,-Bsymbolic-functions"
> in debian/rules solved it for me.
> 
> On Sat, 30 May 2020 at 09:15, Sébastien Villemot <
> sebastien at debian.org
> > wrote:
> > Just one question: did you try to rebuild it from source without
> > changing anything? Maybe it’s just the rebuild that fixed it, and not
> > the flag change.
> 
> I confirm that a no-change rebuild had no effect.

Thanks to you (and to Mo) for doing those rebuilds.

> Could we get this fixed in Debian?  At worst, it should be a no-op in
> Debian, and should someone try rebuilding locally with -Bsymbolic-
> functions they won't fall into this trap.

Sure, we’ll fix it in Debian (a similar fix is present in src:lapack,
by the way).

It could however take some time, because we are currently waiting for
NEW clearance from the most recent upload of src:openblas.

Best,

-- 
⢀⣴⠾⠻⢶⣦⠀  Sébastien Villemot
⣾⠁⢠⠒⠀⣿⡁  Debian Developer
⢿⡄⠘⠷⠚⠋⠀  https://sebastien.villemot.name
⠈⠳⣄⠀⠀⠀⠀  https://www.debian.org

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