When you set up sharing utility code, code generation produces shared utility files for blocks in a model. These blocks require common functionality to implement their algorithm. Other models with an identical shared utility checksum can reuse the code in these shared utility files.
Modularize and share common Model block functionality as helper functions.
Generate reusable code for fixed-point support functions.
Generate reusable code for custom data types.
Reuse shared utility or external code across releases.