Thanks.
Thats also what the maintainer of dpkg answered me to my bug report.
On 23/12/18 6:49 μ.μ., Pascal Hambourg wrote:
Le 22/12/2018 à 02:44, aprekates a écrit :
Indeed some are virtual or pure virtual (although i dont know the diff)
But also there are packages like 'ergo' which look normal
and the only relation i think found (reason to display it) is because
libstd++6 depends on it.
Also listed packages like 'wink' not in the repos any more.
dpkg -l may show packages which are not installed but are mentionned
in installed packages dependencies (Recommends, Suggests,
Conflicts...) or were installed and removed but not purged (leaving
config files).