How can I define my "asm" variable in my model Simulation Target using StateFlow?

Hello,

I am trying to Integrate my Custom C Code in Stateflow based on this example of the documentation.

I have added certain directories containing my hedaers/implementation files in Simulation Target >> Include Directories that I will make use.

When running the model, which is nothing more that the default example with my directories, I am running into an issue where Matlab cannot find __asm__ as stated

Error c:\\j\\documents\\matlab\\acquisition.c: c:\\localdata\\projects\\firmwareprojects\\fw\\support\\my_math.h: 97  undeclared identifier '__asm__' 
Error c:\\j\\documents\\matlab\\acquisition.c: c:\\localdata\\projects\\firmwareprojects\\fw\\support\\my_math.h: 97  Syntax error; missing semicolon before  `volatile' 

Looking the file my_math.h at line 97 I have the following function

static inline unsigned __abs(int value)
{
    unsigned result; // ABS inputval, outputval
    __asm__  volatile("ABS %1, %0" : "=r" (result) : "r" (value));//line 97
    return result;
}

How can I define the variable asm so that I can compile the model?

I have tried to define the variable under the Defines option as shown below but not luck.

THanks in advance,