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XCODE_EMIT_EFFECTIVE_PLATFORM_NAME
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----------------------------------
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Control emission of ``EFFECTIVE_PLATFORM_NAME`` by the :generator:`Xcode`
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generator.
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It is required for building the same target with multiple SDKs. A
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common use case is the parallel use of ``iphoneos`` and
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``iphonesimulator`` SDKs.
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Three different states possible that control when the :generator:`Xcode`
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generator emits the ``EFFECTIVE_PLATFORM_NAME`` variable:
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- If set to ``ON`` it will always be emitted
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- If set to ``OFF`` it will never be emitted
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- If unset (the default) it will only be emitted when the project was
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configured for an embedded Xcode SDK like iOS, tvOS, watchOS or any
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of the simulators.
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.. note::
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When this behavior is enable for generated Xcode projects, the
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``EFFECTIVE_PLATFORM_NAME`` variable will leak into
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:manual:`Generator expressions <cmake-generator-expressions(7)>`
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like ``TARGET_FILE`` and will render those mostly unusable.
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