prime-phylo build path issues in debug symbols

[Vagrant Cascadian]

On 2021-05-20, Nilesh Patra wrote:
> On triggering the salsa pipeline for prime-phylo on salsa, the
> reprotest job fails[1]
> There is a difference in the debug symbols .debs
>
> On taking a look at both debdiff and diffoscope, it seems (to me) that it is a
> buildpath issue, and I checked if -ffile-prefix-map is missing, and it
> wasn't really missing.
> It's hard for me to parse the diffocope logs, and I'm unsure where to
> start debugging this and hence need help there.
>
> The diffoscope output can be found here: https://paste.gnome.org/p9vm7cpyu
> Any help is welcome. Please consider to take a look.

It's already been flagged with build_id_differences_only:

  https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/prime-phylo.html

It appears to build reproducibly in our bullseye tests, where we don't
vary the build path, so most likely you are correct; something
build path related.


This most likely needs to be fixed at the toolchain level and there may
not be much you can do in this package.

live well,
  vagrant
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