Bug#881775: gcc-7-base: please add Breaks: gnat (<< 7)

[Andreas Beckmann <anbe@debian.org>]

Package: gcc-7-base
Version: 7.2.0-14
Severity: normal

Hi,

please add a 
  Breaks: gnat (<< 7)
to gcc-7-base (and merge this to gcc-8-base ...) to fix some stretch ->
buster upgrade paths involving old ada libraries where apt may prefer to
keep gnat-6 installed instead of switching to gnat-7 ...

(This would probably solve itself in case src:gcc-6 leaves buster.)
(I assume there is a good reason for gnat-6 and gnat-7 not being
co-installable.)


Thanks

Andreas