CMAKE_GENERATOR_PLATFORM ------------------------ Generator-specific target platform name specified by user. Some CMake generators support a target platform name to be given to the native build system to choose a compiler toolchain. If the user specifies a platform name (e.g. via the :manual:`cmake(1)` ``-A`` option) the value will be available in this variable. The value of this variable should never be modified by project code. A toolchain file specified by the :variable:`CMAKE_TOOLCHAIN_FILE` variable may initialize ``CMAKE_GENERATOR_PLATFORM``. Once a given build tree has been initialized with a particular value for this variable, changing the value has undefined behavior.