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[Alberto Mardegan <alberto.mardegan@xxxxxxxxxxxxx>]

Hi Colin,
  thanks for your extensive reply, and for debugging this!

On 24/11/22 21:10, Colin Watson wrote:
[...]
> and I see from that that you have your qbs-in-lts PPA configured to
> build against ppa:ubuntu-toolchain-r/ubuntu/test.  Do you have to use
> that PPA?  As I understand it it's not at all intended to be stable, and
> using it has caused your binaries built for bionic to be built with a
> dependency on a package that isn't present in bionic.  This is the root
> cause of your recipe build failure.

I need it because I need g++-7 (or later) to build QBS, and that's not 
available in xenial.
On the other hand it might not be worth updating xenial, so I might just 
drop that PPA. I tried to remove it now, re-copied the packages from 
xenial into bionic (for some reason the xenial package don't have that 
libgcc-s1 dependency, only the bionic build had it), and retried the 
build of mappero that originally failed.

It still fails, but on an unrelated issue, and I see that the right 
version of QBS is installed and working.

Thanks a lot!!

Ciao,
  Alberto