C++ or C with S-Function Builer from Simulink?

[wasomix]

Hello everyone,

I went through the documentation for the S-Function Builder from Mathworks, but I do not know if it is possible use c++ with S-Function Builder or just C.

I did some test and I wrote the same code for a C and for a C++ using a S-Function Builer. For the one in C I did not get errors, but for the one in C++ I got linking errors.

In the Mathworks documentation, the S-Function Builder is inside the topic "Writing S-Functions in C", but not inside "Creating C++ S-Functions"; that is why my question.

Any hint or any help would be really appreciated.

Thank you very much for your help

 

[wasomix]

Hi,

I have just read on the next link

http://www.mathworks.es/help/toolbox/simulink/sfg/brgo03i-2.html

that S-Function Builder can be used with C and C++

 

[FeX32]

You should be able to write it in C or C++.
The older versions of Matlab I believe only worked with C.

Also, you can write one in m-code now I believe. ie. using it to solve some DE's or the like.


Fe

 

[SomptingGuy]

There used to be many similar questions in comp.soft-sys.matlab about this. The usual issue was that the poster was trying to use lcc (rubbish free C compiler supplied with Matlab) to compile code that was actually only C in functionality, but contained some trivial C++ constructs.

If all you need is C functionality, stick to C.

- Steve

 

[wasomix]

Hi Fex32 and SomptingGuy,

First of all thank you very much for your answer.

About the S-Builder functions I have decided to use C instead of C++. I was doing some test. I wrote a function with a loop in Visual Studio 2010. I called this function from Simulink, and the same function with a C file I got no errors, but in C++ I got a link error, which I did not understand why. I do not know if it is maybe the Matlab version I use, which is R2010b.

SomptingGuy I am agree with you about llc. It is rubbish. I use VS2010 as a compiler.

Regards, waso

 

[SomptingGuy]

<rant>

I get annoyed at people who think C/C++ is a language. It's two languages, similar, but with striking differences. I get even more annoyed when people slip C++isms into C code and don't even know they're doing it.

</rant>

- Steve