Calling an outside C function from a legacy_code block !

I have the following set of 3 files :

test.h :

   #ifndef _TEST_H_
   #define _TEST_H_

   extern int test (int a, int b);
   extern int sum (int a, int b);

   #endif

test.c :

   #include "test.h"

   int test(int a, int b)
   {
      int sum;
      sum = test_sum(a, b);
      return sum;
   }

test_sum.c :

   #include "test.h"

   int test_sum(int a, int b)
   {
      int sum;
      sum = a + b;
      return sum;
   }

The stack is : test (to be compiled into legacy_code simulink block) > test_sum (in an external C file that's in the scope)

Now the problem is that when I try to compile the test function into a block using legacy_code, the following compilation error occurs :

error LNK2019: unresolved external symbol test_sum referenced in function test

If I copy and paste the test_sum function from test_sum.c to test.c then there's no error.

My question : How can I call another C function from within a legacy_code block ? Or is it impossible ?

Answer 1

[Franck Yin]

It was simple. All files must be added to the SourceFiles property.

What it was like before :

   def = legacy_code('initialize');
   def.SourceFiles = {'test.c'};

How it was modified in order to build properly :

   def = legacy_code('initialize');
   def.SourceFiles = {'test.c','test_sum.c'};