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877a92e968
The ability to disable adding architectures completely for packaging purposes and cases requiring passing the architectures flags explicitly has been requested. Support a false value for CUDA_ARCHITECTURES and CMAKE_CUDA_ARCHITECTURES for this purpose. Implements #20821.
57 lines
2.0 KiB
ReStructuredText
57 lines
2.0 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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If :prop_tgt:`CUDA_ARCHITECTURES` is set to a false value no architectures
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flags are passed to the compiler. This is intended to support packagers and
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the rare cases where full control over the passed flags is required.
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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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Examples
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^^^^^^^^
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.. code-block:: cmake
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set_property(TARGET tgt PROPERTY CUDA_ARCHITECTURES 35 50 72)
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Generates code for real and virtual architectures ``30``, ``50`` and ``72``.
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.. code-block:: cmake
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set_property(TARGET tgt PROPERTY CUDA_ARCHITECTURES 70-real 72-virtual)
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Generates code for real architecture ``70`` and virtual architecture ``72``.
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.. code-block:: cmake
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set_property(TARGET tgt PROPERTY CUDA_ARCHITECTURES OFF)
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CMake will not pass any architecture flags to the compiler.
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