clang iostream - 未找到符号

Question

所以我试图让clang编译器工作..我自然的首选程序是以下非常复杂的代码:

#include <iostream>
using std::cout;    using std::endl;
/* hello world.cpp */
int main()
{
    cout << "Hello, world!" << endl;
    return 0;
}

在命令行上我做了:clang helloworld.cpp我收到以下错误信息:

Undefined symbols for architecture x86_64:
  "std::ios_base::Init::~Init()", referenced from:
      ___cxx_global_var_init in cc-4iziZq.o
  "std::ios_base::Init::Init()", referenced from:
      ___cxx_global_var_init in cc-4iziZq.o
  "std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)", referenced from:
      _main in cc-4iziZq.o
  "std::cout", referenced from:
      _main in cc-4iziZq.o
  "std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)", referenced from:
      _main in cc-4iziZq.o
  "std::ostream::operator<<(std::ostream& (*)(std::ostream&))", referenced from:
      _main in cc-4iziZq.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

怎么了？谢谢!-kstruct

Answer 1

clang是一个C编译器.您需要使用clang++或使用该-x c++标志.

Answer 2

clang 是一个 C 编译器。您需要使用 clang++ 或使用 -x c++ 标志。

仍然需要添加-lstdc++。

我通过-v选项发现了这一点。我发现差异是：

叮当++

-lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc

铛

-lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed