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CMAKE_GENERATOR_PLATFORM
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------------------------
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Generator-specific target platform specification provided by user.
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Some CMake generators support a target platform name to be given
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to the native build system to choose a compiler toolchain.
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If the user specifies a platform name (e.g. via the :manual:`cmake(1)` ``-A``
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option or via the :envvar:`CMAKE_GENERATOR_PLATFORM` environment variable)
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the value will be available in this variable.
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The value of this variable should never be modified by project code.
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A toolchain file specified by the :variable:`CMAKE_TOOLCHAIN_FILE`
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variable may initialize ``CMAKE_GENERATOR_PLATFORM``. Once a given
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build tree has been initialized with a particular value for this
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variable, changing the value has undefined behavior.
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Platform specification is supported only on specific generators:
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* For :ref:`Visual Studio Generators` with VS 2005 and above this
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specifies the target architecture.
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* For :generator:`Green Hills MULTI` this specifies the target architecture.
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See native build system documentation for allowed platform names.
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Visual Studio Platform Selection
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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On :ref:`Visual Studio Generators` the selected platform name
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is provided in the :variable:`CMAKE_VS_PLATFORM_NAME` variable.
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