From Get docs


New in version 3.8.

This is a CMake Environment Variable. Its initial value is taken from the calling process environment.

Preferred executable for compiling host code when compiling CUDA language files. Will only be used by CMake on the first configuration to determine CUDA host compiler, after which the value for CUDAHOSTCXX is stored in the cache as CMAKE_CUDA_HOST_COMPILER. For any configuration run (including the first), the environment variable will be ignored if the CMAKE_CUDA_HOST_COMPILER variable is defined.

This environment variable is primarily meant for use with projects that enable CUDA as a first-class language.


Ignored when using Visual Studio Generators.

New in version 3.13: The FindCUDA module will use this variable to initialize its CUDA_HOST_COMPILER setting.

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