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Diffstat (limited to 'Help')
| -rw-r--r-- | Help/variable/CMAKE_CUDA_HOST_COMPILER.rst | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/Help/variable/CMAKE_CUDA_HOST_COMPILER.rst b/Help/variable/CMAKE_CUDA_HOST_COMPILER.rst index 34512b4..07342b5 100644 --- a/Help/variable/CMAKE_CUDA_HOST_COMPILER.rst +++ b/Help/variable/CMAKE_CUDA_HOST_COMPILER.rst @@ -3,8 +3,23 @@ CMAKE_CUDA_HOST_COMPILER .. versionadded:: 3.10 -Executable to use when compiling host code when compiling ``CUDA`` language -files. Maps to the ``nvcc -ccbin`` option. Will only be used by CMake on the first -configuration to determine a valid host compiler for ``CUDA``. After a valid -host compiler has been found, this value is read-only. This variable takes -priority over the :envvar:`CUDAHOSTCXX` environment variable. +When :variable:`CMAKE_CUDA_COMPILER <CMAKE_<LANG>_COMPILER>` is set to +NVIDIA ``nvcc``, ``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 + ``CMAKE_CUDA_COMPILER`` is ``nvcc``, it does not make sense to + set ``CMAKE_CUDA_HOST_COMPILER`` explicitly without also setting + ``CMAKE_CUDA_COMPILER`` explicitly to be sure it is ``nvcc``. |