#define DLL_EXPORT __attribute__((visibility("default")))
extern "C" DLL_EXPORT int getVersion();

#include "Test.h"
DLL_EXPORT int getVersion(int a) {
  return a;
}

#include <iostream>
#include <dlfcn.h>
extern "C"  typedef int (*foo_t)(int);
foo_t foo = NULL;

using namespace std;

int main() {
	void* lib = dlopen("libTestLib.so", RTLD_LAZY);
	if(!lib)
	{
		cout << "Cannot load library: " << dlerror() << endl;
		return 0;
	}

	dlerror();

	foo = (foo_t) dlsym(lib, "getVersion"); // foo == 0
	foo = (foo_t) dlsym(lib, "_Z10getVersioni"); // валидное имя фун
	int i = foo(2);
	cout<<"i="<<i<<endl;


  return 0;

}

 
LIBRARY libTestLib
EXPORTS
  getVersion