24 lines
1.1 KiB
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24 lines
1.1 KiB
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.. _infra-cmake-architecture-flags:
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Architecture flags
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==================
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CCCL builds device code for the SM architectures named in ``CMAKE_CUDA_ARCHITECTURES``, a
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semicolon-separated list of SM numbers, each optionally tagged ``-real`` (embed SASS) or
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``-virtual`` (embed PTX for JIT on newer GPUs). CMake also accepts ``native``, ``all``, and
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``all-major``. The
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`CUDA_ARCHITECTURES property <https://cmake.org/cmake/help/latest/prop_tgt/CUDA_ARCHITECTURES.html>`_
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documents the standard syntax and values.
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CCCL adds two values, expanded at configure time by ``cccl_check_cuda_architectures()`` against
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the toolkit found at configure time:
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- ``all-cccl`` — every architecture the current nvcc supports at or above CCCL's minimum.
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- ``all-major-cccl`` — one entry per major architecture at or above the minimum, carrying
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forward PTX on the highest.
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Both resolve against the installed toolkit rather than a fixed table. The minimum supported
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architecture and the full expansion logic live in ``cmake/CCCLCheckCudaArchitectures.cmake``.
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Expansion runs only for a top-level CCCL build; downstream consumers pass a concrete list or
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``native``.
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