[HaBo]

int main(int argc, char **argv)
{
	void *libHandle = dlopen("library.so", RTLD_NOW);
	Class* (*createFunction)() = (Class* (*)())dlsym(libHandle, "createFunction");
	Class *a = createFunction();

	a->virtFunc();

	delete a;
	dlclose(libHandle);
}

class Class
{
	public:
		virtual void virtFunc();
};

void Class::virtFunc()
{
	printf("I was called\n");
}

extern "C" Class* createFunction()
{
	return new Class();
}

(gdb) break main
Breakpoint 1 at 0x80485cd: file main.cpp, line 7.
(gdb) run
Starting program: /home/benediktibk/Desktop/blub/a.out 

Breakpoint 1, main (argc=1, argv=0xbffff434) at main.cpp:7
7		void *libHandle = dlopen("library.so", RTLD_NOW);
(gdb) n
8		Class* (*createFunction)() = (Class* (*)())dlsym(libHandle, "createFunction");
(gdb) n
9		Class *a = createFunction();
(gdb) n

Program received signal SIGSEGV, Segmentation fault.
0x00000000 in ?? ()
(gdb)