Dear maintainer:

During a rebuild of all packages in unstable, package src:stdgpu-contrib
failed to build from source:

CMake Error at cmake/Findthrust.cmake:17 (math):
   math cannot parse the expression: "200302 // macro expansion with ##
   requires this to be a single value / 100000": syntax error, unexpected
   exp_DIVIDE (9).
Call Stack (most recent call first):
   src/stdgpu/CMakeLists.txt:7 (find_package)

I did a debbisect and this is what I found:

bisection finished successfully
   last good timestamp: 20250720T202733Z
   first bad timestamp: 20250721T022532Z
the following packages differ between the last good and first bad timestamp:
   libcu++-dev 2.2.0-5 -> 2.3.2-1
   libcub-dev 2.2.0-5 -> 2.3.2-1
   libthrust-dev 2.2.0-5 -> 2.3.2-1

At this point of the release cycle, I'm not sure about the best way
to handle these kinds of bugs.

If the broken package is fixed and the build-depends is updated
to include libcu++-dev (>= 2.3.2-1) (and the other ones),
I guess it would be ok to reassign this to src:stdgpu-contrib
and consider the issue fixed.

In the meantime, I'm filing this bug mainly to ensure that the
updated build-dependency does not propagate to testing before
the broken package.

Thanks.

El 24/7/25 a las 22:18, Santiago Vila escribió:

No, that would not work... The updated dependency would ensure
that stdgpu-contrib will only migrate if cccl does as well,
but not the opposite.

So, still unsure about the best way to handle this (maybe
if everybody was using autopkgtests this would happen
less often, but naturally that takes time and effort).

Thanks.

Control: reassign -1 src:stdgpu-contrib 1.3.0+git20220507.32e0517-2
Control: tag -1 upstream fixed-upstream patch
Control: forwarded -1 https://github.com/stotko/stdgpu/issues/407

   "The original regular replacement does not consider the possibility that
    THRUST_VERSION may be followed by comments."

https://github.com/stotko/stdgpu/pull/408
https://github.com/stotko/stdgpu/commit/1f0b2d51718692ec9046fe1b36173a591c611bdb.patch


Andreas

retitle 1109841 stdgpu-contrib: FTBFS in forky/sid with new cccl
affects 1109841 =
thanks

Ok, assuming none of the two packages will try to enter testing
before the release, I leave this to Timo, then.

Thanks a lot!

This needs to be fixed for trixie, we need the newer cccl in trixie
otherwise we have an unsupported cccl+nvidia-cuda-toolkit combination in
trixie.
(Due to use of a wrong variable name the dependency was not bumped
automatically in nvidia-cuda-toolkit, otherwise I would have noticed
this earlier.)

Andreas

Thanks, Santiago, for catching this, and thanks, Andreas, for looking up
the fix. I'm going to apply it and request a last minute unblock.

If that does not work out, I agree with Andreas that it is more
important for trixie to have a functional nvidia toolchain than stdgpu.


Cheers
Timo

We believe that the bug you reported is fixed in the latest version of
stdgpu-contrib, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1109841@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Timo Röhling <roehling@debian.org> (supplier of updated stdgpu-contrib package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Fri, 25 Jul 2025 07:32:51 +0200
Binary: libstdgpu-cuda0d libstdgpu-cuda0d-dbgsym libstdgpu-cuda-dev
Source: stdgpu-contrib
Architecture: amd64 arm64 ppc64el source
Version: 1.3.0+git20220507.32e0517-3
Distribution: unstable
Urgency: medium
Maintainer: Timo Röhling <roehling@debian.org>
Changed-By: Timo Röhling <roehling@debian.org>
Closes: 1109841
Description:
 libstdgpu-cuda0d - Efficient STL-like Data Structures on the GPU (CUDA backend)
 libstdgpu-cuda-dev - Efficient STL-like Data Structures on the GPU (CUDA development h
Changes:
 stdgpu-contrib (1.3.0+git20220507.32e0517-3) unstable; urgency=medium
 .
   * Fix Thrust version detection (Closes: #1109841)
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