[Pkg-opencl-devel] Bug#994833: OpenCL programs abort when intel-opencl-icd is installed

[Andreas Beckmann]

On 21/09/2021 19.21, Giuseppe Bilotta wrote:
> So I'm guessing the main issue at play here is that libigdfcl.so.1 is
> _allegedly_  recompiled against LLVM 12 (per the package requires), but
> for some reason the library is still looking for version 11 things.
> 
> reassign -1 libigdfcl1 1.0.8279-1
> 
> (As a side note, libigc1, libigdfcl1 and libigdgmm11 should probably
> Break: versions of intel-opencl-icd not compiled for the same LLVM
> version, to prevent e.g. installation of ICD version 20.x,
> built with LLVM 11,
> with libigc1 etc version 1.0.8279 or later, which are built against
> LLVM 12.)

So if it does matter abi-wise for intel-opencl-icd which version of llvm 
libigfoo1 was compiled against, we should model this in the dependency 
chain.

It's probably best if all libigfoo1 library packages provide a virtual 
package libigfoo1-llvmXX (don't hardcode it, use substvars) and 
intel-opencl-icd depends on that (in addition to libigfoo1 (>= xx)) to 
specify the specific abi needed.
(renaming the real package to libigfoo1-llvmXX each time the llvm major 
version changes is probably overkill)

Are there other users of libigfoo1 besides intel-opencl-icd?

We will proably still run into problems if different ICDs built against 
different LLVM versions are going to be loaded at the same time (e.g. 
pocl/llvm9 and intel/llvm1x) because the different llvm versions seem to 
stomp on each others internal bits. There are bugs open about that ...

I may come up with a patch if time permits.

Andreas