libllvm18:i386 conflicts with libllvm18

[Guilhem Lettron]

libllvm18:i386 conflict with libllvm18, but isn't mark like so.

```
Unpacking libllvm18:i386 (1:18.1.3-1) ...
dpkg: error processing archive /var/cache/apt/archives/libllvm18_1%3a18.1.3-1_i386.deb (--unpack):
 trying to overwrite shared '/usr/lib/llvm-18/lib/libLLVM.so.1', which is different from other instances of package libllvm18:i386
```

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Andi Chandler (bing)]

FYI this appears to be a Steam dependancy.

[q4a (q4a)]

BTW, there is same problem on ARM systems: libllvm18:armhf conflicts with libllvm18:arm64
dpkg: error processing archive /var/cache/apt/archives/libllvm18_1%3a18.1.3-1_armhf.deb (--unpack):
 trying to overwrite shared '/usr/lib/llvm-18/lib/libLLVM.so.1', which is different from other instances of package libllvm18:armhf
Errors were encountered while processing:
 /var/cache/apt/archives/libllvm18_1%3a18.1.3-1_armhf.deb

[Talorin (talorin)]

Quick Solution: sudo mv /usr/lib/llvm-18/lib/libLLVM.so.1 /usr/lib/llvm-18/lib/libLLVM.so.1_backup
Install again.

[Fox (trifonovsv)]

steam-libs -> mesa -> libllvm17t64 -> /usr/lib/x86_64-linux-gnu/libLLVM-17.so.1
steam-libs:i386 -> mesa:i386 -> libllvm17t64:i386 -> /usr/lib/i386-linux-gnu/libLLVM-17.so.1

sudo add-apt-repository ppa:oibaf/graphics-drivers

steam-libs -> mesa -> libllvm18 -> /usr/lib/llvm-18/lib/libLLVM.so.1
steam-libs:i386 -> mesa:i386 -> libllvm18:i386 -> /usr/lib/llvm-18/lib/libLLVM.so.1

[oyvindln (oyvindln)]

Doing the "quick solution" in comment #5 is a very bad idea - especially if you are running into the issue when using a ppa for updated graphics drivers. It will cause anything that is linking to llvm-18 to fail to run, and if that includes the graphics drivers that will include causing a boot failure.

If you want to "work around" it you have to also put it back again afterwards while keeping the i386 version around and fixing the symlink that is supposed to point to it so it actually works as intended.

[Guilhem Lettron (guilhem-fr)]

Problem is more deep.
Both package are not properly done, using both a non-standard path for libraries: "/usr/lib/llvm-18/lib/"
So it makes import failing and conflict between i386 and amd64 packages.

I had to:
sudo cp /usr/lib/llvm-18/lib/libLLVM.so.18.1 /usr/lib/x86_64-linux-gnu/
sudo ln -s /usr/lib/x86_64-linux-gnu/libLLVM.so.18.1 /usr/lib/x86_64-linux-gnu/libLLVM.so.1

(the same for i386 after some packaging hacking to bypass overwrite like in #5)

[Guilhem Lettron (guilhem-fr)]

After digging, problem comes from this commit:
https://salsa.debian.org/pkg-llvm-team/llvm-toolchain/-/commit/a1442f1a02b047998847bb99b923347a19bd02e5

[Sylvestre Ledru (sylvestre)]

I will have a look

[Oibaf (oibaf)]

ppa:oibaf/graphics-drivers -> I just reverted to building mesa with llvm17 until this get fixed.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.