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

[Dirk Eddelbuettel]

On 30 May 2020 at 21:39, Sébastien Villemot wrote:
| 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.

Awesome too. Really good to see everybody remains on top of this.

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