Specify this S-function supports code reuse
Signifies that this S-function is compatible with the Simulink® Coder™ product subsystem code reuse feature. See S-Functions That Support Code Reuse (Simulink Coder) in the "Simulink Coder User's Guide" for more information. If this option is not set, the Simulink Coder product will not reuse any subsystem containing this S-Function.
See timestwo.c for
an example.