Bug#763655: boinc-amd-opencl: wrong dependencies regarding OpenCL

[Andrei POPESCU]

Control: reassign -1 boinc-amd-opencl

On Mi, 01 oct 14, 18:11:27, Vincent Danjean wrote:
> Source: boinc-amd-opencl
> Version: 7.2.47+dfsg-3~bpo70+1
> Severity: important
 
Bugs against packages from backports should normally *not* be reported 
in the BTS, but at a quick glance this seems to apply also to unstable 
(and it's the same Maintainer anyway).

Kind regards,
Andrei

>   Hi,
> 
>   I just notice that you package is depending on "amd-libopencl1 | fglrx | fglrx-updates"
> I do not understand how this can be correct.
> 
>   Indeed, in Debian, fglrx and fglrx-updates do not exist at all currently
> (even as virtual packages). apt-get cannot install them. So these alternatives
> are void (perhaps there are here for other distributions such as ubuntu, I do
> not know).
>   And amd-libopencl1 is an *ICD Loader*, not an ICD. It means that this is not
> an OpenCL implementation but only a loader of such implementation. And
> it can load any ICD installed on the machine (not just the AMD one). And
> other ICD loaders can be used instead of this one (even with the AMD ICD,
> ie the AMD OpenCL implementation).
> 
>   So, I think that you should remove this dependency, instead use:
> - "Depends: libopencl1-X.Y-1" to depends on a ICD Loader that support
>   OpenCL up to version X.Y. Currently, these virtual packages exists
>   for 1.1, 1.2 and 2.0.
>     Note that, in the usual case, this dependency is added automaticcaly
>   whith dh_shlibs due to symbol files when you have a program that links
>   with libOpenCL.so.1
> - "Depends: amd-opencl-icd" if you wish to force the presence of the
>   AMD OpenCL implementation. Note that other OpenCL implementations can
>   be installed and OpenCL programs have to explicitly choose which ICD
>   they will use. The ICD loader (even the AMD one packaged in
>   amd-libopencl1) will choose a random one as default.
>     The ocl-icd-libopencl1 ICD Loader allows to choose the default ICD
>   with an environment variable.
>     If you require only a (standard) OpenCL environment, you should
>   depends (or recommends) only the opencl-icd virtual package, so that
>   other OpenCL implementations can satisfy your dependency.
> 
>   Regards,
>     Vincent
> 
> -- System Information:
> Debian Release: jessie/sid
>   APT prefers stable-updates
>   APT policy: (500, 'stable-updates'), (500, 'unstable'), (500, 'testing'), (500, 'stable'), (500, 'oldstable'), (1, 'experimental')
> Architecture: amd64 (x86_64)
> Foreign Architectures: i386
> armel
> mipsel
> 
> Kernel: Linux 3.14-2-amd64 (SMP w/8 CPU cores)
> Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
> Shell: /bin/sh linked to /bin/dash

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