Bug#969962: Please make nvidia-cuda-dev multi-arch installable

[Raul Tambre]

Package: nvidia-cuda-toolkit
Version: nvidia-cuda-dev
Severity: wishlist

Dear maintainer,

I'd like to crosscompile CUDA from amd64 to arm64 and have tried to install
nvidia-cuda-toolkit:amd64 and nvidia-cuda-dev:arm64.

Unfortunately nvidia-cuda-dev and its dependency libnvidia-ml-dev aren't
marked as Multi-Arch: same, preventing installing them at the same time and
making crosscompiling impossible.
At a first glance I don't see any reason that both of them couldn't be
marked as Multi-Arch:same.

Is there a reason for this or can this be improved?
Thanks in advance!

-- System Information:
Debian Release: bullseye/sid
  APT prefers experimental
  APT policy: (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: arm64

Kernel: Linux 5.8.0-1-amd64 (SMP w/8 CPU threads)
Kernel taint flags: TAINT_UNSIGNED_MODULE
Locale: LANG=en_IE.UTF-8, LC_CTYPE=en_IE.UTF-8 (charmap=UTF-8), LANGUAGE=en_IE:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages nvidia-cuda-toolkit depends on:
ii  clang                           1:12.0.0~+git20200909.e67ece79-1
ii  libc6                           2.31-3
ii  libgcc-s1                       10.2.0-6
ii  libstdc++6                      10.2.0-6
ii  nvidia-cuda-dev                 11.0.3-1
pn  nvidia-opencl-dev | opencl-dev  <none>
pn  nvidia-profiler                 <none>

Versions of packages nvidia-cuda-toolkit recommends:
pn  nsight-compute           <none>
pn  nsight-systems           <none>
pn  nvidia-cuda-gdb          <none>
pn  nvidia-cuda-toolkit-doc  <none>
pn  nvidia-visual-profiler   <none>

Versions of packages nvidia-cuda-toolkit suggests:
ii  nvidia-driver  450.66-1