About Variant Systems

The Embedded Coder software generates code from a Simulink model containing one or more Model Variants blocks or Variant Subsystem blocks. To learn how to create a model containing variant blocks, see Modeling Variant Systems in the Simulink documentation.

By default, the Simulink Coder software generates code for the active variant. The Embedded Coder software can generate code for only the active variant or for all variants. Code generated for all variants is surrounded by C preprocessor conditionals, #if, #elif, and #endif. Therefore, the active variant is selected at C compile time and the preprocessor conditionals determine which sections of the code to execute.

Variant Systems

Why Generate Code for Variant Systems?

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