1It is often convenient to be able to build compiler-rt libraries for a certain
2platform without having a full SDK or development environment installed.
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4This makes it easy for users to build a compiler which can target a number of
5different platforms, without having to actively maintain full development
6environments for those platforms.
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8Since compiler-rt's libraries typically have minimal interaction with the
9system, we achieve this by stubbing out the SDKs of certain platforms.
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