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CMAKE_GENERATOR_PLATFORM
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------------------------
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.. versionadded:: 3.1
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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 :option:`cmake -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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Visual Studio Platform Selection
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The :ref:`Visual Studio Generators` support platform specification
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using one of these forms:
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* ``platform``
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* ``platform[,key=value]*``
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* ``key=value[,key=value]*``
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The ``platform`` specifies the target platform (VS target architecture),
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such as ``x64``, ``ARM64``, or ``Win32``. The selected platform
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name is provided in the :variable:`CMAKE_VS_PLATFORM_NAME` variable.
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The ``key=value`` pairs form a comma-separated list of options to
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specify generator-specific details of the platform selection.
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Supported pairs are:
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``version=<version>``
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.. versionadded:: 3.27
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Specify the Windows SDK version to use. This is supported by VS 2015 and
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above when targeting Windows 10.0+ or Windows Store. CMake will set the
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:variable:`CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION` variable to the
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selected SDK version.
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The ``<version>`` may be one of:
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``10.0``
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Specify that any 10.0 SDK version may be used, and let Visual Studio
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pick one. This is supported by VS 2019 and above.
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``10.0.<build>.<increment>``
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Specify the exact 4-component SDK version, e.g., ``10.0.19041.0``.
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The specified version of the SDK must be installed. It may not exceed
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the value of :variable:`CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION_MAXIMUM`,
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if that variable is set.
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If the ``version`` field is not specified, CMake selects a version as
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described in the :variable:`CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION`
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variable documentation.
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