CMAKE_HOST_SYSTEM

Composite Name of OS CMake is being run on.

This variable is the composite of :variable:CMAKE_HOST_SYSTEM_NAME and :variable:CMAKE_HOST_SYSTEM_VERSION, e.g. ${CMAKE_HOST_SYSTEM_NAME}-${CMAKE_HOST_SYSTEM_VERSION}. If :variable:CMAKE_HOST_SYSTEM_VERSION is not set, then this variable is the same as :variable:CMAKE_HOST_SYSTEM_NAME.