[BUG]: cuda.core fails to build from source against cuda-bindings 13.0.x #2699

Is this a duplicate?

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Type of Bug

Compile-time Error

Component

cuda.core

Describe the bug

Building cuda-core from source against cuda-bindings==13.0.x fails at Cython compilation time. This is distinct from the runtime import failure fixed in #2063/#2064 -- that fix addressed cuDevSmResourceSplit not being found at import time. This issue is about the build itself failing.

The root cause is that build_hooks.py only passes CUDA_CORE_BUILD_MAJOR (integer 12 or 13) to Cython's compile-time environment. Several IF CUDA_CORE_BUILD_MAJOR >= 13: guards in _device_resources.pyx reference types, enum values, and struct fields that were only introduced in cuda-bindings 13.1.0, not 13.0.x.

When building with CUDA 13.0 headers, CUDA_CORE_BUILD_MAJOR is set to 13, which activates all >= 13 guards, including those that reference:

• CUdevSmResource_st.flags field
• CU_DEV_SM_RESOURCE_GROUP_PARAMS struct
• CUdevSmResourceGroup_flags enum
• CUdevWorkqueueConfigScope enum
• CUdevWorkqueueConfigResource / CUdevWorkqueueResource structs
• CU_DEV_RESOURCE_TYPE_WORKQUEUE_CONFIG / CU_DEV_RESOURCE_TYPE_WORKQUEUE enum values
• CUdevResource_st.wqConfig, .wq fields

None of these exist in cuda-bindings 13.0.x's cydriver.pxd, causing Cython to fail.

The issue is scoped to 10 guards, all in _device_resources.pyx. The remaining 40+ IF CUDA_CORE_BUILD_MAJOR >= 13: guards across the codebase (graph, memory, tensor_map, device modules) use only types available in cuda-bindings 13.0.x and are unaffected.

How to Reproduce

1. Install CUDA 13.0 toolkit (so CUDA_HOME points to a 13.0 installation)
2. pip install cuda-bindings==13.0.3
3. Attempt to build cuda-core from source: pip install --no-binary cuda-core cuda-core
4. Cython compilation fails with errors about unknown types/fields from cydriver.pxd

Expected behavior

cuda-core should build successfully against any cuda-bindings 13.0.x release, with 13.1+ features gracefully disabled at compile time.

System information

Any system with CUDA 13.0 toolkit and cuda-bindings 13.0.x installed.