Bug#895949: lintian: warn about packages with udebs but no udeb line in shlibs

[Emilio Pozuelo Monfort <pochu@debian.org>]

On 17/04/18 21:21, Chris Lamb wrote:
> Hi Emilio,
> 
> Disclaimer: I'm not a shared library expert, let alone a shlibs
> one! However, as I understand it, we need to look for:
> 
>   * A "libfooX" & "libfooX-udeb" pair …
> 
>   * That both ship a "libBar.so.X"
> 
>   * libfooX's shlibs control file does not contain a line starting
>     with "udeb: libBar X libfooX-udeb"...
> 
> (At a first approximation anyway...)

Yes, but libfooX may be named differently (i.e. it's not always a s/-udeb$//),
and there may be several non-udebs affected.

So I'd approach this in this way (in pseudocode):

for each shared library in the -udeb
there is a deb package with that library, and
its shlibs contains a udeb line for that shared lib

That would match your libfoo1 and libfoo1-udeb, but also something like
libpango1.0-udeb shipping shared libraries from libpango-1.0-0,
libpangocairo-1.0-0, libpangoxft-1.0-0 and libpangoft2-1.0-0. In that case, each
one of those debs needs a udeb: fine for the libraries that the udeb ships.

Hope that's clear. If not, please let me know.

Thanks,
Emilio