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e98588aaba
Simplifies CUDA target architecture handling. Required for Clang support as Clang doesn't automatically select a supported architecture. We detect a supported architecture during compiler identification and set CMAKE_CUDA_ARCHITECTURES to it. Introduces CMP0104 for backwards compatibility with manually setting code generation flags with NVCC. Implements #17963.
32 lines
1.3 KiB
ReStructuredText
32 lines
1.3 KiB
ReStructuredText
CMP0104
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-------
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Initialize :variable:`CMAKE_CUDA_ARCHITECTURES` when
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:variable:`CMAKE_CUDA_COMPILER_ID <CMAKE_<LANG>_COMPILER_ID>` is ``NVIDIA``.
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Raise an error if :prop_tgt:`CUDA_ARCHITECTURES` is empty.
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:variable:`CMAKE_CUDA_ARCHITECTURES` introduced in CMake 3.18 is used to
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initialize :prop_tgt:`CUDA_ARCHITECTURES`, which passes correct code generation
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flags to the CUDA compiler.
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Previous to this users had to manually specify the code generation flags. This
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policy is for backwards compatibility with manually specifying code generation
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flags.
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The ``OLD`` behavior for this policy is to not initialize
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:variable:`CMAKE_CUDA_ARCHITECTURES` when
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:variable:`CMAKE_CUDA_COMPILER_ID <CMAKE_<LANG>_COMPILER_ID>` is ``NVIDIA``.
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Empty :prop_tgt:`CUDA_ARCHITECTURES` is allowed.
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The ``NEW`` behavior of this policy is to initialize
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:variable:`CMAKE_CUDA_ARCHITECTURES` when
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:variable:`CMAKE_CUDA_COMPILER_ID <CMAKE_<LANG>_COMPILER_ID>` is ``NVIDIA``
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and raise an error if :prop_tgt:`CUDA_ARCHITECTURES` is empty during generation.
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This policy was introduced in CMake version 3.18. CMake version
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|release| warns when the policy is not set and uses ``OLD`` behavior.
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Use the :command:`cmake_policy` command to set it to ``OLD`` or ``NEW``
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explicitly.
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.. include:: DEPRECATED.txt
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