| CMAKE_APPLE_SILICON_PROCESSOR | |
| ----------------------------- | |
| .. versionadded:: 3.19.2 | |
| .. include:: include/ENV_VAR.rst | |
| On Apple Silicon hosts running macOS, set this environment variable to tell | |
| CMake what architecture to use for :variable:`CMAKE_HOST_SYSTEM_PROCESSOR`. | |
| The value must be either ``arm64`` or ``x86_64``. | |
| The :variable:`CMAKE_APPLE_SILICON_PROCESSOR` normal variable, if set, | |
| overrides this environment variable. |