Code Generation Error with S-Function

I have a simple model

with a simple S-function project that does multiplication.

When I try to generate code from this model with the following build command

clear, clc

rtwbuild('Test_Model')

I get loads of errors as follows;

Somehow, I think, it has to do with custom code part of model configuration which I could not fix.

Without changing the S-Function project, I would like to be able to generate code successfully.

Answer 1

[Githin George]

Hi Serhat,

You might have missed adding your dependencies (multiplier.cpp) to your S-Function in the block parameters. This usually helps Simulink figure out all the CPP files required to do the code generation and avoid any potential linker errors. In my case "multiply_sfunction" is my S-Function and it depends on the CPP file "multiply.cpp"

See the Image below:

From the images I am assuming you are using CPP files instead of tlc to define your S-Function in which case this should work fine.

Refer to the documentation below:

https://www.mathworks.com/help/rtw/ug/build-integrated-code-within-the-simulink-environment.html#bp67s_y-3

[Serhat Sarihan]

Hello Githin,

This solved my problem. Thank you very much for your help.