c++ - 程序在g++中进行编译，但由于gcc中的链接器错误而退出

我正在尝试将solution更改为question about specialized template classes。

该代码在g++中可以很好地进行编译，但是在使用gcc进行编译时会引发链接器错误。这些错误的原因是什么？

$ g++ traits2.cpp
$ gcc traits2.cpp
/tmp/ccI7CNCY.o: In function `__static_initialization_and_destruction_0(int, int)':
traits2.cpp:(.text+0x36): undefined reference to `std::ios_base::Init::Init()'
traits2.cpp:(.text+0x3b): undefined reference to `std::ios_base::Init::~Init()'
/tmp/ccI7CNCY.o:(.eh_frame+0x11): undefined reference to `__gxx_personality_v0'
collect2: ld returned 1 exit status

traits2.ccp文件包含上述的solution和一个emtpy main()函数:

#include <iostream>

using namespace std;

// A default Traits class has no information
template<class T> struct Traits
{
};

// A convenient way to get the Traits of the type of a given value without
// having to explicitly write out the type
template<typename T> Traits<T> GetTraits(const T&)
{
    return Traits<T>();
}

template <int major, int minor> struct A
{
    void f()
    {
        cout << major << endl;
    }
};

// Specialisation of the traits for any A<int, int>
template<int N1, int N2> struct Traits<A<N1, N2> >
{
    enum { major = N1, minor = N2 };
};

template <> struct A<4,0>
{
    void f()
    {
        cout << "Specialized:" << GetTraits(*this).major << endl;
    }
};

int main(int argc, char * argv[] )
{
    /*
    A<4,0> p;
    A<1,2> p2;
    p.f();
    p2.f();
    */
    return 1;
}

最佳答案

使用gcc进行编译时，默认情况下未链接C++库。始终使用g++构建C++代码。