# CMAKE_VS_PLATFORM_TOOLSET_HOST_ARCHITECTURE

New in version 3.8.

Visual Studio preferred tool architecture.

The Visual Studio Generators for VS 2013 and above support using either the 32-bit or 64-bit host toolchains by specifying a `host=x86` or `host=x64` value in the `CMAKE_GENERATOR_TOOLSET` option. CMake provides the selected toolchain architecture preference in this variable (`x86`, `x64`, `ARM64` or empty).