Bug #995810: libgoogle-glog-dev: Dependency on libunwind-dev

[Michael Weghorn]

Hi,

On Thu, 30 Dec 2021 11:11:43 +0100 Marc Glisse 
<marc.glisse at normalesup.org> wrote:
> Package: libgoogle-glog-dev
> Version: 0.5.0+really0.4.0-2
> Severity: normal
> 
> Dear Maintainer,
> 
> with the switch to llvm-13 in testing, installing libgoogle-glog-dev has
> become problematic, it depends on libunwind-dev, but that conflicts with
> libunwind-13-dev.
> I couldn't find an official doc on what the LLVM
> maintainers expect, but it looks like depending on libunwind-x.y-dev may
> work. I didn't test it though, some libunwind files seem to have moved,
> and I may have completely misunderstood the relation between the various
> libunwind packages.

I have run into a similar problem with the libgstreamer1.0-dev package, 
which can no longer be installed in parallel with libc++-dev because

* libc++-dev depends on libc++-13-dev, which depends on 
libunwind-13-dev, which breaks libunwind-dev
* libgstreamer1.0-dev depends on libunwind-dev

As far as I can see, two relevant commits in the LLVM packaging git repo 
on the way to the current situation are:

* Commit c72a6c0e50e318c83e6bff901dd0e2e591f65145 [1], "Generate 
libunwind-12 & libunwind-12-dev packages", which added the 
libunwind-<VERSION>-dev package with a "Breaks" on libunwind-dev
* Commit 103cb1357c55b508e283d329083119d2429029ca [2], "libc++-13-dev 
should depends on libunwind-13-dev (Closes: #995810)", which added the 
corresponding dependency

Can the LLVM packaging team possibly give a hint what is the intended 
way to deal with the situation?
(I would then open a bug report for libgstreamer1.0-dev with the 
relevant information as well if something has to be done there)?

Best regards,
Michael


[1] 
https://salsa.debian.org/pkg-llvm-team/llvm-toolchain/-/commit/c72a6c0e50e318c83e6bff901dd0e2e591f65145
[2] 
https://salsa.debian.org/pkg-llvm-team/llvm-toolchain/-/commit/103cb1357c55b508e283d329083119d2429029ca