rebuilding packages producing no amd64, but other binary-arch packages

[Andreas Beckmann <anbe@debian.org>]

Hi,

I just looked at #917650, the qi FTBFS which goes back to jessie (at least).

Source packages that build binary-arch packages, but no amd64 binary
packages are usually not tested by archive wide rebuilds and may
silently FTBFS for a long time.
This should not affect packages building only arch:all binary packages,
since they can be (are?) tested during amd64 rebuilds, too.

Does anyone have an idea how to quickly build a list of these for sid?
Ideally something like
  source-package version arch1 arch2 arch3 ...
(where [all amd64] are not in arch-list)


Andreas