[BUG]: thrust::cuda_cub::launcher::triple_chevron is called in headers even for non CUDA compilers

[caugonnet]

Is this a duplicate?

• I confirmed there appear to be no duplicate issues for this bug and that I agree to the Code of Conduct

Type of Bug

Compile-time Error

Component

Thrust

Describe the bug

When compiling cuGraph code with a recent CCCL, some .cpp file compiled with a non CUDA compiler includes headers which eventually include headers that do need a CUDA compiler.

I am not sure if the problem is in RAFT, RMM, Thrust or CUB here ! Maybe some additional safeguard in CCCL headers would be helpful to detect we are using an inappropriate compiler earlier in the list of nested includes ?

In file included from /home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/cccl-src/lib/cmake/cub/../../../cub/cub/detail/launcher/cuda_runtime.cuh:15,
                 from /home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/cccl-src/lib/cmake/cub/../../../cub/cub/util_device.cuh:762,
                 from /home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/cccl-src/lib/cmake/thrust/../../../thrust/thrust/system/cuda/detail/util.h:42,
                 from /home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/cccl-src/lib/cmake/thrust/../../../thrust/thrust/system/cuda/detail/malloc_and_free.h:36,
                 from /home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/cccl-src/lib/cmake/thrust/../../../thrust/thrust/system/detail/adl/malloc_and_free.h:50,
                 from /home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/cccl-src/lib/cmake/thrust/../../../thrust/thrust/system/detail/generic/memory.inl:32,
                 from /home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/cccl-src/lib/cmake/thrust/../../../thrust/thrust/system/detail/generic/memory.h:70,
                 from /home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/cccl-src/lib/cmake/thrust/../../../thrust/thrust/detail/reference.h:38,
                 from /home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/cccl-src/lib/cmake/thrust/../../../thrust/thrust/memory.h:35,
                 from /home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/cccl-src/lib/cmake/thrust/../../../thrust/thrust/device_ptr.h:33,
                 from /home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/cccl-src/lib/cmake/thrust/../../../thrust/thrust/device_free.h:32,
                 from /home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/cccl-src/lib/cmake/thrust/../../../thrust/thrust/device_malloc_allocator.h:32,
                 from /home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/rmm-src/include/rmm/mr/device/thrust_allocator_adaptor.hpp:26,
                 from /home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/rmm-src/include/rmm/exec_policy.hpp:27,
                 from /home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/raft-src/cpp/include/raft/core/resource/thrust_policy.hpp:22,
                 from /home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/raft-src/cpp/include/raft/core/device_resources.hpp:35,
                 from /home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/raft-src/cpp/include/raft/core/handle.hpp:19,
                 from /home/caugonnet/git/caugonnet_cugraph/cpp/include/cugraph/utilities/dataframe_buffer.hpp:20,
                 from /home/caugonnet/git/caugonnet_cugraph/cpp/include/cugraph/edge_property.hpp:19,
                 from /home/caugonnet/git/caugonnet_cugraph/cpp/include/cugraph/algorithms.hpp:20:
/home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/cccl-src/lib/cmake/thrust/../../../thrust/thrust/system/cuda/detail/core/triple_chevron_launch.h: In member function 'cudaError_t thrust::cuda_cub::launcher::triple_chevron::doit_host(K, const Args& ...) const':
/home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/cccl-src/lib/cmake/thrust/../../../thrust/thrust/system/cuda/detail/core/triple_chevron_launch.h:112:10: error: expected primary-expression before '<' token
  112 |       k<<<grid, block, shared_mem, stream>>>(args...);
      |          ^
/home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/cccl-src/lib/cmake/thrust/../../../thrust/thrust/system/cuda/detail/core/triple_chevron_launch.h:112:44: error: expected primary-expression before '>' token
  112 |       k<<<grid, block, shared_mem, stream>>>(args...);
      |                                            ^
/home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/cccl-src/lib/cmake/thrust/../../../thrust/thrust/system/cuda/detail/core/triple_chevron_launch.h:112:50: error: expected ')' before '...' token
  112 |       k<<<grid, block, shared_mem, stream>>>(args...);
      |                                                  ^~~
/home/caugonnet/git/caugonnet_cugraph/cpp/build/_deps/cccl-src/lib/cmake/thrust/../../../thrust/thrust/system/cuda/detail/core/triple_chevron_launch.h:112:45: note: to match this '('
  112 |       k<<<grid, block, shared_mem, stream>>>(args...);
      |                                             ^

How to Reproduce

Compile the cpp lib for that branch which updates CCCL in cuGraph rapidsai/cugraph#4833

Expected behavior

The RAFT header should be compilable from any compiler, or report some error earlier

Reproduction link

No response

Operating System

No response

nvidia-smi output

No response

NVCC version

No response

[caugonnet]

We should probably surround these headers with "#ifdef CUDA compilers"

cub/cub/detail/launcher/cuda_runtime.cuh
cub/cub/util_device.cuh