c++ - Windows 7 上的 C++ 程序中的链接器错误

Question

我只是想尝试编译器选项，但出现链接器错误。通过 MinGW 在 Windows 7 上使用的 g++ 是 4.7.2

代码是一个名为test.cpp的简单测试代码:

#include <iostream>
#include <cstdlib>
using namespace std;

#define max 10

int main()
{
 int a;
 int arr[max];
 cout<<"this is the sample text"<<endl;
 system("pause");
}

现在我开始一步步编译:

1.cpp test.cpp>test.i
2.g++ -S test.i
3.as -o test.o test.s
4.ld -o test.exe test.o

前三步没问题，最后一步出现以下错误:

test.o:test.cpp:(.text+0x12): undefined reference to `__main'
test.o:test.cpp:(.text+0x21): undefined reference to `std::cout'
test.o:test.cpp:(.text+0x26): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)'
test.o:test.cpp:(.text+0x2d): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)'
test.o:test.cpp:(.text+0x34): undefined reference to `std::ostream::operator<<(std::ostream& (*)(std::ostream&))'
test.o:test.cpp:(.text+0x43): undefined reference to `system'
test.o:test.cpp:(.text+0x52): undefined reference to `_Unwind_Resume'
test.o:test.cpp:(.text+0x6a): undefined reference to `std::ios_base::Init::~Init()'
test.o:test.cpp:(.text+0x8b): undefined reference to `std::ios_base::Init::Init()'
test.o:test.cpp:(.text+0x97): undefined reference to `atexit'
ld: test.o: bad reloc address 0x0 in section `.ctors'
ld: final link failed: Invalid operation

Answer 1

您的问题是您没有将所需的库(例如标准 C++ 库)和其他目标文件传递给 ld。

我不在 windows 上工作，但我认为这样做很简单:

g++ test.cpp -o test

应该可以。 g++ 自动为您进行预处理和链接。