C++ 无法编译一个"；“你好，世界”；我的OSX中的cpp

我在mac上写了一个hello world程序，但当我编译它时，编译器输出了一个错误：

Undefined symbols for architecture x86_64:
  "std::__1::locale::use_facet(std::__1::locale::id&) const", referenced from:
      std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in endian0-654ab7.o
  "std::__1::ios_base::getloc() const", referenced from:
      std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in endian0-654ab7.o
  "std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::__init(unsigned long, char)", referenced from:
      std::__1::ostreambuf_iterator<char, std::__1::char_traits<char> > std::__1::__pad_and_output<char, std::__1::char_traits<char> >(std::__1::ostreambuf_iterator<char, std::__1::char_traits<char> >, char const*, char const*, char const*, std::__1::ios_base&, char) in endian0-654ab7.o
  "std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::~basic_string()", referenced from:
      std::__1::ostreambuf_iterator<char, std::__1::char_traits<char> > std::__1::__pad_and_output<char, std::__1::char_traits<char> >(std::__1::ostreambuf_iterator<char, std::__1::char_traits<char> >, char const*, char const*, char const*, std::__1::ios_base&, char) in endian0-654ab7.o
  "std::__1::basic_ostream<char, std::__1::char_traits<char> >::sentry::sentry(std::__1::basic_ostream<char, std::__1::char_traits<char> >&)", referenced from:
      std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in endian0-654ab7.o
  "std::__1::basic_ostream<char, std::__1::char_traits<char> >::sentry::~sentry()", referenced from:
      std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in endian0-654ab7.o
  "std::__1::cout", referenced from:
      _main in endian0-654ab7.o
  "std::__1::ctype<char>::id", referenced from:
      std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in endian0-654ab7.o
  "std::__1::locale::~locale()", referenced from:
      std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in endian0-654ab7.o
  "std::__1::ios_base::__set_badbit_and_consider_rethrow()", referenced from:
      std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in endian0-654ab7.o
  "std::__1::ios_base::clear(unsigned int)", referenced from:
      std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in endian0-654ab7.o
  "std::terminate()", referenced from:
      ___clang_call_terminate in endian0-654ab7.o
  "___cxa_begin_catch", referenced from:
      std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in endian0-654ab7.o
      ___clang_call_terminate in endian0-654ab7.o
  "___cxa_end_catch", referenced from:
      std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in endian0-654ab7.o
  "___gxx_personality_v0", referenced from:
      std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in endian0-654ab7.o
      std::__1::ostreambuf_iterator<char, std::__1::char_traits<char> > std::__1::__pad_and_output<char, std::__1::char_traits<char> >(std::__1::ostreambuf_iterator<char, std::__1::char_traits<char> >, char const*, char const*, char const*, std::__1::ios_base&, char) in endian0-654ab7.o
      Dwarf Exception Unwind Info (__eh_frame) in endian0-654ab7.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

架构x86_64的未定义符号： “std:：uu 1:：locale:：use_facet（std:：u 1:：locale:：id&）const”，引用自： std:：uu 1:：basic_ostream&std:u 1:：u put_character_序列（std:u 1:：basic_ostream&，char const*，unsigned long）在endian0-654ab7.o中 “std:：_1:：ios_base:：getloc（）const”，引用自： std:：uu 1:：basic_ostream&std:u 1:：u put_character_序列（std:u 1:：basic_ostream&，char const*，unsigned long）在endian0-654ab7.o中 “std:：_1:：基本字符串：：_init（无符号长字符）”，引用自： std:：uu 1:：ostreambuf_迭代器std:u 1:：u pad_和_输出（std:：u 1:：ostreambuf_迭代器，char const*，char const*，char const*，std:u 1:：ios_base&，char）在endian0-654ab7.o中 “std:：uu 1:：basic_string:：~basic_string（）”，引用自： std:：uu 1:：ostreambuf_迭代器std:u 1:：u pad_和_输出（std:：u 1:：ostreambuf_迭代器，char const*，char const*，char const*，std:u 1:：ios_base&，char）在endian0-654ab7.o中 “std:：uu 1:：basic_ostream:：sentry:：sentry（std:：u 1:：basic_ostream&）”，引用自： std:：uu 1:：basic_ostream&std:u 1:：u put_character_序列（std:u 1:：basic_ostream&，char const*，unsigned long）在endian0-654ab7.o中 “std:：_1:：basic_ostream:：sentry:：~sentry（）”，引用自： std:：uu 1:：basic_ostream&std:u 1:：u put_character_序列（std:u 1:：basic_ostream&，char const*，unsigned long）在endian0-654ab7.o中 “标准：：_1:：cout”，引用自： _endian0-654ab7.o中的主管道 “std:：_1:：ctype:：id”，引用自： std:：uu 1:：basic_ostream&std:u 1:：u put_character_序列（std:u 1:：basic_ostream&，char const*，unsigned long）在endian0-654ab7.o中 “std:：_1:：locale:：~locale（）”，引用自： std:：uu 1:：basic_ostream&std:u 1:：u put_character_序列（std:u 1:：basic_ostream&，char const*，unsigned long）在endian0-654ab7.o中 “std:：_u1:：ios_base:：_set_badbit_和_consupt_rethrow（）”，引用自： std:：uu 1:：basic_ostream&std:u 1:：u put_character_序列（std:u 1:：basic_ostream&，char const*，unsigned long）在endian0-654ab7.o中 “std:：_1:：ios_base:：clear（unsigned int）”，引用自： std:：uu 1:：basic_ostream&std:u 1:：u put_character_序列（std:u 1:：basic_ostream&，char const*，unsigned long）在endian0-654ab7.o中 “std:：terminate（）”，引用自： ___叮当声呼叫终止于endian0-654ab7.o “\uuuuuuuucxa\u begin\u catch”，引用自： std:：uu 1:：basic_ostream&std:u 1:：u put_character_序列（std:u 1:：basic_ostream&，char const*，unsigned long）在endian0-654ab7.o中 ___叮当声呼叫终止于endian0-654ab7.o “\uuuuuuuucxa\u end\u catch”，引用自： std:：uu 1:：basic_ostream&std:u 1:：u put_character_序列（std:u 1:：basic_ostream&，char const*，unsigned long）在endian0-654ab7.o中 “\uuuuuuugxx\u个性\u v0”，引用自： std:：uu 1:：basic_ostream&std:u 1:：u put_character_序列（std:u 1:：basic_ostream&，char const*，unsigned long）在endian0-654ab7.o中 std:：uu 1:：ostreambuf_迭代器std:u 1:：u pad_和_输出（std:：u 1:：ostreambuf_迭代器，char const*，char const*，char const*，std:u 1:：ios_base&，char）在endian0-654ab7.o中 endian0-654ab7.o中的侏儒异常展开信息（uu eh_帧） ld:找不到架构x86_64的符号 叮当声：错误：链接器命令失败，退出代码为1（使用-v查看调用） 以下是节目：

#include <iostream>
using namespace std;

int main(int argc, char *argv[])
{
    cout<< "hello world";
    return 0;
}

#包括
使用名称空间std；
int main（int argc，char*argv[]）
{
CUT
看起来像是丢失了（链接不到）C++运行库。当你没有显示你用来编译和链接程序的命令行时，应该这样做：
$ clang++ -o hello hello.cpp

<>你也可以试试这个。这是用来把库链接到链接器的。这里是C++运行时库。

clang -l c++ -o hello hello.cpp

我更喜欢使用clang++。

-l标志不会改变标准一致性，它用于
指定链接哪些库。这里-L C++表示LBC++链接。
无论何时您需要libstdc++库，它都不会工作
必须使用-l stdc++。因此，使用
Calang++将管理C++所需的所有系统库。
如何构建程序？我使用下面的代码> Gcc-O EndidiEndia0.CPP<代码>，如我通常在LuuxAs中使用的TROANGOFE，尝试CLAN+++。我使用命令<代码> GCC-O EndidiEndia0.CPP<代码>，但是为什么编译器没有检测到它是C++文件？@ Hauly它是这样做的，问题是，当你没有使用<代码> G++< /C> >它不知道包括TH。E+C++运行时库。我记得读<代码> G++只是Mac上的代码< CLAN+++ >代码的前端，所以这可能是答案。“我更喜欢”。如果你可以用一些事实来代替为什么它是更好的选择。-L标志不改变标准一致性，它用来指定要链接的库。这里-L C++表示LBC+++链接。每当你需要LIbSTDc++库时，它就不起作用。更好的做法是使用CLAN+++，它将管理C++所需的所有系统库。