Build fails with CUDA 13

[lahwaacz]

Building oidn fails with CUDA 13, which removed support for GPU architectures prior to sm_75:

FAILED: CMakeFiles/OpenImageDenoise_device_cuda.dir/cutlass_conv_sm70.cu.o
/opt/cuda/bin/nvcc -forward-unknown-to-host-compiler -DOIDN_DEVICE_CUDA_API_DRIVER -DOpenImageDenoise_device_cuda_EXPORTS -D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS -I/build/openimagedenoise/src/oidn-2.3.3/devices/cuda/../../external/cutlass/include -I/build/openimagedenoise/src/oidn-2.3.3/devices/cuda/../../external/cutlass/tools/util/include -isystem /opt/cuda/targets/x86_64-linux/include -isystem /opt/cuda/targets/x86_64-linux/include/cccl -isystem /build/openimagedenoise/src/oidn-2.3.3 -isystem /build/openimagedenoise/src/oidn-2.3.3/external -isystem /build/openimagedenoise/src/oidn-2.3.3/build -O3 -DNDEBUG -std=c++17 -Xcompiler=-fPIC -fvisibility=internal -fvisibility-inlines-hidden -Wno-deprecated-gpu-targets --expt-relaxed-constexpr -gencode arch=compute_70,code=sm_70 -MD -MT CMakeFiles/OpenImageDenoise_device_cuda.dir/cutlass_conv_sm70.cu.o -MF CMakeFiles/OpenImageDenoise_device_cuda.dir/cutlass_conv_sm70.cu.o.d -x cu -c /build/openimagedenoise/src/oidn-2.3.3/devices/cuda/cutlass_conv_sm70.cu -o CMakeFiles/OpenImageDenoise_device_cuda.dir/cutlass_conv_sm70.cu.o
nvcc fatal   : Unsupported gpu architecture 'compute_70'

[lahwaacz]

In Arch Linux we have a patch that just removes the sm_70 architecture. But you likely want some conditionals to keep support for older CUDA versions...

[atafra]

Fixed in 8ca6f49, will be released soon in 2.4.0.

Please note that the although the Arch Linux patch indeed fixes the compile error, it's not sufficient, and CUDA support becomes non-functional at runtime, never detecting any CUDA devices at all.