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CMAKE_CUDA_HOST_COMPILER ------------------------ .. versionadded:: 3.10 When :variable:`CMAKE_CUDA_COMPILER_ID <CMAKE_<LANG>_COMPILER_ID>` is ``NVIDIA``, ``CMAKE_CUDA_HOST_COMPILER`` selects the compiler executable to use when compiling host code for ``CUDA`` language files. This maps to the ``nvcc -ccbin`` option. The ``CMAKE_CUDA_HOST_COMPILER`` variable may be set explicitly before CUDA is first enabled by a :command:`project` or :command:`enable_language` command. This can be done via ``-DCMAKE_CUDA_HOST_COMPILER=...`` on the command line or in a :ref:`toolchain file <Cross Compiling Toolchain>`. Or, one may set the :envvar:`CUDAHOSTCXX` environment variable to provide a default value. Once the CUDA language is enabled, the ``CMAKE_CUDA_HOST_COMPILER`` variable is read-only and changes to it are undefined behavior. .. note:: Since ``CMAKE_CUDA_HOST_COMPILER`` is meaningful only when the :variable:`CMAKE_CUDA_COMPILER_ID <CMAKE_<LANG>_COMPILER_ID>` is ``NVIDIA``, it does not make sense to set ``CMAKE_CUDA_HOST_COMPILER`` without also setting ``CMAKE_CUDA_COMPILER`` to NVCC. .. note:: Ignored when using :ref:`Visual Studio Generators`.