auto_ptr gcc version 3.3.1 (cygming special) problem

[Marcelo Rezende Módolo]

Hi,
I am not shure that this is a error , but it is very strange...

//autoPtr.cpp
#include <iostream>
#include <memory>
using namespace std;
 
class B  {
public:
    B(int cid) : cid_(cid) { cout << "B(" << cid_ << ")\n"; }
    ~B() { cout << "~B(" << cid_ << ")\n"; }
private:
    int cid_;          
};
 
class A  {
public:
    A(int cid) : cid_(cid) { cout << "A(" << cid_ << ")\n"; }
    ~A() { cout << "~A(" << cid_ << ")\n"; }  
    B* getB() { return new B(cid_); }
private:
    int cid_;  
};
 
int main(int argc, char *argv[])
{
    A a(1);
    auto_ptr<B> b = static_cast< auto_ptr<B> >(a.getB());
    A a2(2);
    auto_ptr<B> b2 = static_cast< auto_ptr<B> >(a2.getB());
    cin.get();
  return 0;
}

If I compile this file with gcc version 3.2.3 (mingw special 20030504-1) 
no errors ocur (g++ -o autoPtr autoPtr.cpp).
But if I try to compile using gcc version 3.3.1 (cygming special), with 
the same command line (g++ -o autoPtr autoPtr.cpp),
this errors ocur:
autoPtr.cpp: In function `int main(int, char**)':
autoPtr.cpp:26: error: invalid static_cast from type `B*' to type `
   std::auto_ptr<B>'
autoPtr.cpp:29: error: invalid static_cast from type `B*' to type `
   std::auto_ptr<B>'

what is the problem??

thanks,
marcelo



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