Re: libraptor2-0: please add a Breaks against libraptor1 versions without symbol versioning

[Jonathan Nieder <jrnieder@gmail.com>]

In January, Jonathan Nieder wrote:
> Adrian Knoth wrote:

>> The situation is as follows:
>>
>>    - ardour depends on liblrdf (mind the l after lib)
>>         - liblrdf depends on libraptor1
>>
>>    - ardour depends on libslv2
>>         - libslv2 depends on librdf0 (no l this time)
>>               - librdf0 (>= 1.0.13-1) depends on libraptor2
>>
>> And there you have it, clashing symbols.
>>
>> The solution is to add symbol versioning to both raptor libraries, then
>> recompile librdf, liblrdf and afterwards libslv2 (the whole dependency
>> chain backwards). In the end, recompile ardour.
>
> Is that last step (in the end, recompile ardour) needed?
>
> I'm asking because if it is, this will break partial upgrades from
> squeeze.  If it isn't, it should be enough for the updated librdf0 to
> gain a (direct or indirect) Breaks against versions of libraptor1 that
> lack versioned symbols, to ensure the correct upgrade order.
>
> That is, probably libraptor2-0 should Breaks: libraptor1 (<< 1.4.21-3).
> How about this patch?

Ping.  The patch below should be risk-free and should ensure upgrades
actually work.  Any fixes needed before it is ready to be applied?

Thanks,
Jonathan

> ---
>  debian/changelog |    7 +++++++
>  debian/control   |    1 +
>  2 files changed, 8 insertions(+), 0 deletions(-)
> 
> diff --git a/debian/changelog b/debian/changelog
> index c48a8a87..37a940cc 100644
> --- a/debian/changelog
> +++ b/debian/changelog
> @@ -1,3 +1,10 @@
> +raptor2 (2.0.6-1.1) local; urgency=low
> +
> +  * debian/control: add a breaks relation by libraptor2-0 against squeeze
> +    libraptor1 to force upgrades to a version with symbol versioning
> +
> + -- Jonathan Nieder <jrnieder@gmail.com>  Sun, 22 Jan 2012 16:39:45 -0600
> +
>  raptor2 (2.0.6-1) unstable; urgency=low
>  
>    * New upstream release
> diff --git a/debian/control b/debian/control
> index 8d758eeb..abe13400 100644
> --- a/debian/control
> +++ b/debian/control
> @@ -21,6 +21,7 @@ Package: libraptor2-0
>  Section: libs
>  Architecture: any
>  Depends: ${misc:Depends}, ${shlibs:Depends}
> +Breaks: libraptor1 (<< 1.4.21-3)
>  Suggests: raptor2-utils
>  Description: Raptor 2 RDF syntax library
>   Raptor is a C library providing a set of parsers and serializers for
> -- 
> 1.7.9.rc2
>