Bug#1115227: libllvm19: Installing libllvm19:i386 on a AMD64 system with libllvm19 already installed will force apt to remove libllvm19 and dependent packages.

[Sylvestre Ledru]

Le 15/09/2025 à 13:54, Simon McVittie a écrit :

> On Sun, 14 Sep 2025 at 17:09:17 +0200, Sebastian Ramacher wrote:
>
>> On 2025-09-14 14:19:00 +0200, Sebastian Ramacher wrote:
>>
>>> On 2025-09-14 12:31:48 +0100, Bogdans Krutilins wrote:
>>>
>>>> - Attempted to install libllvm19:i386 as it is a requirement for Steam.
>>>> - I ran "sudo apt install libllvm19:i386". This caused apt to state that it
>>>> will be removing libllvm19, xorg, nvidia-driver ffmpeg, clang, chromium etc.
>
> This was caused by an overly general solution to #1100981.
> https://salsa.debian.org/pkg-llvm-team/llvm-toolchain/-/commit/fb68d9241f1338333cf5260136378e4a7ef43308
> removed "Multi-Arch: same" from the packages that were not multiarch
> co-installable (such as libmlir-19, which is not co-installable because
> it contains /usr/lib/llvm-19/lib/libMLIR.so.19.1), but also removed that
> annotation from the packages that *were* multiarch co-installable, such
> as libllvm19 (which is co-installable, because it only contains
> non-colliding paths like /usr/lib/x86_64-linux-gnu/libLLVM.so.19.1).
>
> It would be useful if maintainers of packages that are involved in the
> multiarch graphics stack, like LLVM and Mesa, could keep both the :amd64
> and :i386 flavours of a package like mesa-vulkan-drivers installed on
> their development machines (assuming they use x86, which I imagine that
> most still do) - that would avoid this sort of thing getting uploaded
> and regressing end-user systems.

In general, it would be nice to add tests in:

https://salsa.debian.org/pkg-llvm-team/llvm-toolchain/-/blob/snapshot/debian/qualify-clang.sh?ref_type=heads

to make sure these features don't regress.
(it can be as simple as looking at the dpkg output if the right fields are present)

Should I just revert ?

https://salsa.debian.org/pkg-llvm-team/llvm-toolchain/-/commit/fb68d9241f1338333cf5260136378e4a7ef43308

Thanks

Sylvestre
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