[rlug] [offtopic] Problema de programare pe obiecte

[Serghei Amelian]

Am urmatoarele doua clase:

/***************************************************************************
 *                                                                         *
 *   CSQLAbstractQuery                                                     *
 *                                                                         *
 ***************************************************************************/
class CSQLAbstractQuery
{
public:
  CSQLAbstractQuery(CSQLServer *server) : server(server) {}
  ~CSQLAbstractQuery() {}
  int setSQL(const char *sql, ...);
  const char *getSQL() { return buffer; }

protected:
  virtual int exec();
  
private:
  CSQLServer *server;
  char buffer[512];
};

 


/***************************************************************************
 *                                                                         *
 *   CSQLQuery                                                             *
 *                                                                         *
 ***************************************************************************/
class CSQLQuery : public CSQLAbstractQuery
{
public:
  CSQLQuery(CSQLServer *server) : CSQLAbstractQuery(server) {}
  ~CSQLQuery() {}

  int exec() { return 0; }
};

La linkeditare zice 
/storage/common/proiecte/argus/src/salarix/sql/csql.h:85: undefined reference 
to `CSQLAbstractQuery virtual table' 
/storage/common/proiecte/argus/src/salarix/sql/csql.h:85: undefined reference 
to `CSQLAbstractQuery virtual table' 
/storage/common/proiecte/argus/src/salarix/sql/csql.h:85: undefined reference 
to `CSQLAbstractQuery type_info function' 
/storage/common/proiecte/argus/src/salarix/sql/csql.h:85: undefined reference 
to `CSQLAbstractQuery type_info node'

Problema apare doar daca exec din CSQLAbstractQuery este virtual, in caz 
contrar se compileaza corect. Idei?
-- 
Serghei.
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