错误编译ncurses的

Question

当我试图编译的ncurses 5.9嵌入式系统（使用buildroot的），我得到这个错误信息：

In file included from ../c++/cursesm.h:39:0, 
       from ../c++/cursesm.cc:35: 
../c++/cursesp.h: In member function ‘T* NCursesUserPanel<T>::UserData() const’: 
../c++/cursesp.h:256:43: error: no matching function for call to 
‘NCursesUserPanel<T>::get_user() const’ 
    return reinterpret_cast<T*>(get_user()); 

这里是有问题的代码：

/* We use templates to provide a typesafe mechanism to associate 
* user data with a panel. A NCursesUserPanel<T> is a panel 
* associated with some user data of type T. 
*/ 
template<class T> class NCursesUserPanel : public NCursesPanel 
{ 
public: 
    NCursesUserPanel (int nlines, 
        int ncols, 
        int begin_y = 0, 
        int begin_x = 0, 
        const T* p_UserData = STATIC_CAST(T*)(0)) 
    : NCursesPanel (nlines, ncols, begin_y, begin_x) 
    { 
     if (p) 
     set_user (const_cast<void *>(p_UserData)); 
    }; 
    // This creates an user panel of the requested size with associated 
    // user data pointed to by p_UserData. 

    NCursesUserPanel(const T* p_UserData = STATIC_CAST(T*)(0)) : NCursesPanel() 
    { 
    if (p) 
     set_user(const_cast<void *>(p_UserData)); 
    }; 
    // This creates an user panel associated with the ::stdscr and user data 
    // pointed to by p_UserData. 

    virtual ~NCursesUserPanel() {}; 

    T* UserData (void) const 
    { 
    return reinterpret_cast<T*>(get_user()); 
    }; 
    // Retrieve the user data associated with the panel. 

    virtual void setUserData (const T* p_UserData) 
    { 
    if (p) 
     set_user (const_cast<void *>(p_UserData)); 
    } 
    // Associate the user panel with the user data pointed to by p_UserData. 
}; 

256行是这一个：return reinterpret_cast<T*>(get_user());

Answer 1

这里的问题是由于编译器更新为g++ (Debian 7.2.0-5)。新的编译器具有更好的错误处理能力，而且这个旧代码的编写没有任何好处。这里的解决方案是使用更新版本的ncurses（对于我的特定情况，不使用）或使用较旧的编译器。由于我的主机系统是Debian，因此我使用update-alternatives切换到g ++ 6.4，并且有问题的错误信息消失了。

我在这里离开这里，因为Google没有给我提供错误信息的好结果。