Bug#965215: dune-common: please lower parallel builds

[Ansgar]

On Fri, 2020-07-17 at 20:03 +0200, Gianfranco Costamagna wrote:
> Hello, dune-common is FTBFS in Ubuntu and on systems where there is not enough ram, because of OOM killer.

The package builds in Debian. Maybe Canonical Ltd should configure
their buildd network with similar parameters as Debian (e.g. similar
amount of memory per task)?

> Can you please consider adding --max-parallel=3 to dh invocation?
> 
> People might want to rebuild on their system without having to swap during the build process.

That might require parallel=1 depending on the system anyway.  I
usually build with parallel=8 without problems, so I don't want to
limit it to 3.

Ansgar