S-function for static library

Dear all,

I am trying to generate S-function for static library which is built in Code composer studio using Legacy Code Tool .

I took a simple example, but get an error like this:

### Start Compiling ex_doubleit

mex('ex_doubleit.c', '-IC:\Users\User\Documents\MATLAB\DoubleItLib', 'C:\Users\Vasyl Varvolik\Documents\MATLAB\DoubleItLib\Debug\DoubleItLib.lib')

Building with 'MinGW64 Compiler (C)'.

Error using mex

C:\Users\VASYLV~1\AppData\Local\Temp\mex_111404873555618_24800\ex_doubleit.obj:ex_doubleit.c:(.text+0x2704): undefined

reference to `doubleIt'

C:\Users\VASYLV~1\AppData\Local\Temp\mex_111404873555618_24800\ex_doubleit.obj:ex_doubleit.c:(.text+0xd0): undefined

reference to `doubleIt'

collect2.exe: error: ld returned 1 exit status

Error in legacycode.LCT/compile

Error in legacycode.LCT.legacyCodeImpl

Error in legacy_code (line 103)

[varargout{1:nargout}] = legacycode.LCT.legacyCodeImpl(action, varargin{1:end});

Error in Legacy_Code_Tool (line 57)

legacy_code('compile', def);

My m-file:

def = legacy_code('initialize')

def.HeaderFiles = {'DoubleItLib.h'};

def.HostLibFiles = {'DoubleItLib.lib'};

def.LibPaths = {'C:\Users\User\Documents\MATLAB\DoubleItLib\Debug'};

def.Options.language = 'C';

def.SFunctionName = 'ex_doubleit';

def.OutputFcnSpec = 'void doubleIt(double u1, double y1[1])';

legacy_code('sfcn_cmex_generate', def);

legacy_code('compile', def);

The library was built successfully in Code composer project:

* DoubleItLib.h

void doubleIt(double inVa, double *outVal);

#endif /* INCLUDE_DOUBLEITLIB_H_ */

* main.c

*/

void doubleIt(double inVal, double *outVal)

{

*outVal=2*(inVal);

}

Is it enough to use just library and header?

Answer 1

[Mark McBroom]

The library you built in Code COmposer studio is for a TI processor. S-Functions are built to run on Windows ( or LInux) and therefore can only be linked to libraries built for the same platform. If you want to use the library with your s-function, you will have to compile it with the same mingw64 compiler that Simulink uses to create the S-Function.

[Vasyl Varvolik]

Totally agree. Thanks a lot!