对vtable的未定义引用 [英] Undefined reference to vtable

问题描述

所以，我得到了臭名昭着的可怕的参考'vtable ...错误下面的代码（所讨论的类是CGameModule。），我不能为我的生活理解的问题是什么。起初，我以为这是忘记给一个虚拟的功能一个身体，但据我所知，一切都在这里。继承链是有点长，但这里是相关的源代码。我不知道应该提供什么其他信息。

注意：构造函数是发生这种错误的地方。

我的代码：

  class CGameModule：public CDasherModule {
 public：
 CGameModule（Dasher :: CEventHandler * pEventHandler，CSettingsStore * pSettingsStore，CDasherInterfaceBase * pInterface，ModuleID_t iID，const char * szName）
：CDasherModule（pEventHandler，pSettingsStore，iID，0，szName）
 {
 g_pLogger-> Log（Inside game module constructor）; 
 m_pInterface = pInterface; 
} 
 
 virtual〜CGameModule（）{}; 
 
 std :: string GetTypedTarget（）; 
 
 std :: string GetUntypedTarget（）; 
 
 bool DecorateView（CDasherView * pView）{
 // g_pLogger-> Log（装饰视图）; 
 return false; 
} 
 
 void SetDasherModel（CDasherModel * pModel）{m_pModel = pModel; } 
 
 
 virtual void HandleEvent（Dasher :: CEvent * pEvent）; 
 
 private：
 
 
 
 CDasherNode * pLastTypedNode; 
 
 
 CDasherNode * pNextTargetNode; 
 
 
 std :: string m_sTargetString; 
 
 
 size_t m_stCurrentStringPos; 
 
 
 CDasherModel * m_pModel; 
 
 
 CDasherInterfaceBase * m_pInterface; 
};继承自... 
 
 
 <$ p 
 
 
 
 
 
 
 
 $ p>  class CDasherModule; 
 typedef std :: vector< CDasherModule *> :: size_type ModuleID_t; 
 
 /// \ingroup Core 
 /// @ {
 class CDasherModule：public Dasher :: CDasherComponent {
 public：
 CDasherModule :: CEventHandler * pEventHandler，CSettingsStore * pSettingsStore，ModuleID_t iID，int iType，const char * szName）; 
 
 virtual ModuleID_t GetID（）; 
 virtual void SetID（ModuleID_t）; 
 virtual int GetType（）; 
 virtual const char * GetName（）; 
 
 virtual bool GetSettings（SModuleSettings ** pSettings，int * iCount）{
 return false; 
}; 
 
 private：
 ModuleID_t m_iID; 
 int m_iType; 
 const char * m_szName; 
}; 
  

这继承自....

 命名空间Dasher {
 class CEvent; 
 class CEventHandler; 
 class CDasherComponent; 
}; 
 
 /// \ingroup Core 
 /// @ {
 class Dasher :: CDasherComponent {
 public：
 CDasherComponent（Dasher :: CEventHandler * pEventHandler，CSettingsStore * pSettingsStore）; 
 virtual〜CDasherComponent（）; 
 
 void InsertEvent（Dasher :: CEvent * pEvent）; 
 virtual void HandleEvent（Dasher :: CEvent * pEvent）{}; 
 
 bool GetBoolParameter（int iParameter）const; 
 void SetBoolParameter（int iParameter，bool bValue）const; 
 
 long GetLongParameter（int iParameter）const; 
 void SetLongParameter（int iParameter，long lValue）const; 
 
 std :: string GetStringParameter（int iParameter）const; 
 void SetStringParameter（int iParameter，const std :: string& sValue）const; 
 
 ParameterType GetParameterType（int iParameter）const; 
 std :: string GetParameterName（int iParameter）const; 
 
 protected：
 Dasher :: CEventHandler * m_pEventHandler; 
 CSettingsStore * m_pSettingsStore; 
}; 
 /// @} 
 
 
 #endif 
  




解决方案

所以，我想出了这个问题，它是一个坏的逻辑，不完全熟悉automake / autotools世界的组合。我正在添加正确的文件到我的Makefile.am模板，但我不知道在我们的构建过程中的哪一步实际创建了makefile本身。所以，我正在编译一个旧的makefile，不知道我的新文件。

感谢您的回应和链接到GCC常见问题。我一定会阅读，以避免这个问题发生的一个真正的原因。

So, I'm getting the infamously horrible "undefined reference to 'vtable..." error for the following code (The class in question is CGameModule.) and I cannot for the life of me understand what the problem is. At first, I thought it was related to forgetting to give a virtual function a body, but as far as I understand, everything is all here. The inheritance chain is a little long, but here is the related source code. I'm not sure what other information I should provide.

Note: The constructor is where this error is happening, it'd seem.

My code:

class CGameModule : public CDasherModule {
 public:
  CGameModule(Dasher::CEventHandler *pEventHandler, CSettingsStore *pSettingsStore, CDasherInterfaceBase *pInterface, ModuleID_t iID, const char *szName)
  : CDasherModule(pEventHandler, pSettingsStore, iID, 0, szName)
  { 
      g_pLogger->Log("Inside game module constructor");   
      m_pInterface = pInterface; 
  }

  virtual ~CGameModule() {};

  std::string GetTypedTarget();

  std::string GetUntypedTarget();

  bool DecorateView(CDasherView *pView) {
      //g_pLogger->Log("Decorating the view");
      return false;
  }

  void SetDasherModel(CDasherModel *pModel) { m_pModel = pModel; }


  virtual void HandleEvent(Dasher::CEvent *pEvent); 

 private:



  CDasherNode *pLastTypedNode;


  CDasherNode *pNextTargetNode;


  std::string m_sTargetString;


  size_t m_stCurrentStringPos;


  CDasherModel *m_pModel;


  CDasherInterfaceBase *m_pInterface;
};

Inherits from...

class CDasherModule;
typedef std::vector<CDasherModule*>::size_type ModuleID_t;

/// \ingroup Core
/// @{
class CDasherModule : public Dasher::CDasherComponent {
 public:
  CDasherModule(Dasher::CEventHandler * pEventHandler, CSettingsStore * pSettingsStore, ModuleID_t iID, int iType, const char *szName);

  virtual ModuleID_t GetID();
  virtual void SetID(ModuleID_t);
  virtual int GetType();
  virtual const char *GetName();

  virtual bool GetSettings(SModuleSettings **pSettings, int *iCount) {
    return false;
  };

 private:
  ModuleID_t m_iID;
  int m_iType;
  const char *m_szName;
};

Which inherits from....

namespace Dasher {
  class CEvent;
  class CEventHandler;
  class CDasherComponent;
};

/// \ingroup Core
/// @{
class Dasher::CDasherComponent {
 public:
  CDasherComponent(Dasher::CEventHandler* pEventHandler, CSettingsStore* pSettingsStore);
  virtual ~CDasherComponent();

  void InsertEvent(Dasher::CEvent * pEvent);
  virtual void HandleEvent(Dasher::CEvent * pEvent) {};

  bool GetBoolParameter(int iParameter) const;
  void SetBoolParameter(int iParameter, bool bValue) const;

  long GetLongParameter(int iParameter) const;
  void SetLongParameter(int iParameter, long lValue) const;

  std::string GetStringParameter(int iParameter) const;
  void        SetStringParameter(int iParameter, const std::string & sValue) const;

  ParameterType   GetParameterType(int iParameter) const;
  std::string     GetParameterName(int iParameter) const;

 protected:
  Dasher::CEventHandler *m_pEventHandler;
  CSettingsStore *m_pSettingsStore;
};
/// @}


#endif

解决方案

So, I've figured out the issue and it was a combination of bad logic and not being totally familiar with the automake/autotools world. I was adding the correct files to my Makefile.am template, but I wasn't sure which step in our build process actually created the makefile itself. So, I was compiling with an old makefile that had no idea about my new files whatsoever.

Thanks for the responses and the link to the GCC FAQ. I will be sure to read that to avoid this problem occurring for a real reason.

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