The packages we should build are restricted by:
* Package configuration in debian/config (limits which binary packages are
included in debian/control)
* Architecture (specified per package in debian/templates/control.* and
then in debian/control)
* Build profile (specified per package in debian/templates/control.* and
then in debian/control)
The logic for these restrictions is currently repeated in
debian/rules.real, but sometimes it becomes inconsistent with
debian/control (as with my recent changes for libbpf).
dh_listpackages reads debian/control and filters it by the current
host architecture and build profiles, so that it reliably reports
which packages we should build.
Therefore:
* Replace the logic in debian/rules.real with checks for package names
in the output of dh_listpackages
* Remove the redundant flag variables passed by debian/rules and
debian/rules.gen
* Remove the special-casing of stage1 in debian/rules and
debian/rules.gen
fdd6dadb4a