#include <iostream>
#include <cstdarg>

using namespace std;

int g_myInt = 5;
int& getIntReference() { return g_myInt; }

int myVarArgFunction( int a, ...) {
  va_list arguments;
  va_start(arguments, a); 
  
  return a + va_arg(arguments, int&);
}

int main() {
  cout<<myVarArgFunction( 10, getIntReference() )<<endl;
  return 0;
}

cc1plus: warnings being treated as errors
In function 'int myVarArgFunction(int, ...)':
Line 13: warning: cannot receive objects of non-POD type 'int&' through '...'; call will abort at runtime