Initialization of a static member of a template class fails

[Valery Jean-Michel <Jean-Michel dot Valery at fr dot thalesgroup dot com>]

Hi,

I'm facing a problem with gcc and I don't know if it's a known bug or not.
I have found (<http://www.ddj.com/dept/cpp/184403955>) an example of a
template class to manage enum which have worked well with gcc 3.2.3 20030502
(Red Hat Linux 3.2.3-42) (after a few modifications to enable compiling).
But, as I'm using now gcc 3.4.5 20051201, I had to modify the initialization
of a static member (s_instances in the code below) to avoid compilation
errors but I get a segmentation fault when running the program.
Thanks by advance for your help.
Best regards.
Jean-Michel

Code of the template class:
#include <set>
template <class T>
class Enum {
private:

  // Predicate for finding the corresponding instance
  struct Enum_Predicate_Corresponds:
   public std::unary_function<const Enum<T>*, bool> {
      Enum_Predicate_Corresponds(int Value): m_value(Value) { }
      bool operator()(const Enum<T>* E)
      { return E->Get_Value() == m_value; }
   private:
      const int m_value;
  };
  // Comparison functor for the set of instances
  struct Enum_Ptr_Less:
   public std::binary_function<const Enum<T>*, const Enum<T>*, bool> {
      bool operator()(const Enum<T>* E_1, const Enum<T>* E_2)
      { return E_1->Get_Value() < E_2->Get_Value(); }
  };
protected:
  // Constructors
  Enum(int Value): m_value(Value) {
  s_instances.insert(this);
  };
public:
  // Compiler-generated copy constructor and operator= are OK.
  typedef typename std::set<const Enum<T>*, Enum_Ptr_Less> instances_list;
  typedef typename instances_list::const_iterator const_iterator;
  // Access to int value
  int Get_Value(void) const { return m_value; }
  static int Min(void) { return (*s_instances.begin())->m_value; }
  static int Max(void) { return (*s_instances.rbegin())->m_value; }
  static const Enum<T>* Corresponding_Enum(int Value)
  { const_iterator it = find_if(s_instances.begin(), s_instances.end(), 
   Enum_Predicate_Corresponds(Value));
   return (it != s_instances.end()) ? *it : NULL; }
  static bool Is_Valid_Value(int Value) { return Corresponding_Enum(Value)
!= NULL; }
  // Number of elements
  //static instances_list::size_type size(void) { return s_instances.size();
  static int size(void) { return s_instances.size();
}
  // Iteration
  static const_iterator begin(void) { return s_instances.begin(); }
  static const_iterator end(void) { return s_instances.end(); }
private:
  int m_value;
  static instances_list s_instances;
};

Main code:
#include "Enum.h"
typedef enum _e_MODE {
        MODE_OFF = 0,
        MODE_ON = 1
} MODE;
 
class MODE_Enum: public Enum<MODE_Enum> {
 
private:
 explicit MODE_Enum(int Value): Enum<MODE_Enum>(Value) { }
 
public:
  static const MODE_Enum mode_on;
  static const MODE_Enum mode_off;
};
 
template <class T> typename Enum<T>::instances_list Enum<T>::s_instances;
/* Previous code used with older gcc (3.2.3 20030502 (Red Hat Linux
3.2.3-42) )was
Enum<SONAR_MODE_Enum>::instances_list Enum<SONAR_MODE_Enum>::s_instances;
which leads to, with latest gcc (3.4.5 20051201 (Red Hat 3.4.5-2)):
error: too few template-parameter-lists
*/
const MODE_Enum MODE_Enum::mode_off(MODE_OFF);
const MODE_Enum MODE_Enum::mode_on(MODE_ON);
int main(int argc, char* argv[])
{
}