Bug#926935: arpack: FTBFS (does not honor parallel=n in DEB_BUILD_OPTIONS)

[Santiago Vila]

On Wed, Apr 24, 2019 at 04:47:16PM +0200, Sylvestre Ledru wrote:
> Le 24/04/2019 à 16:45, Santiago Vila a écrit :
> > On Wed, Apr 24, 2019 at 04:24:59PM +0200, ghisvail at gmail.com wrote:
> > > Anyone objecting on applying Santiago's patch to src:arpack to fix the
> > > occasionnal FTBFS on single-core builders?
> > > 
> > > If not, then I am happy to prepare a release.
> > 
> > Thanks a lot.
> > 
> > One minor clarification: The failure happens always on single-cpu systems,
> > not just occassionally.
> > 
> Don't hesitate to forward that upstream if you find a fix
> https://github.com/opencollab/arpack-ng

A general fix (i.e. one that upstream accept) would probably involve
using "nproc" command inside the Makefiles, but then we would have to
override that anyway to avoid using so many simultaneous jobs if the
user explicitly ask for less jobs via DEB_BUILD_OPTIONS.

The safe/conservative thing to do would be to use 1 job for the test suite.

I can put an issue in github if you confirm there is not one yet.

Thanks.