Link Error : Undefined symbols

[mohitmv]

Hi, I compiled following C++ code in linux machine using g++ -c code.cpp -o code.o

#include <iostream>
using namespace std;

int main() {
  cout << "ABC" << endl;
  return 0;
}

Then I converted code.o to code_mac.o using ./objconv -fmacho64 -nu code.o code_mac.o on mac.

Then I tried to build executable in mac using g++ code_mac.o -o code_mac

and I'm getting following error :

  "std::ostream::operator<<(std::ostream& (*)(std::ostream&))", referenced from:
      _main in mohit_1.o
  "std::ios_base::Init::Init()", referenced from:
      _main in mohit_1.o
  "std::ios_base::Init::~Init()", referenced from:
      _main in mohit_1.o
  "std::cout", referenced from:
      _main in mohit_1.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 mohit_1.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 mohit_1.o
  "___mh_execute_header", referenced from:
      _main in mohit_1.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

What am i missing ?
Doesn't objconv change the standard library (libstdc++) when I converted a linux binary to mac binary ?