G++ sous linux

j ai une petite question concernant g++

toto.cc

Code:

#include <iostream>
 
using namespace std;  le makefile
 
 int main()
 {
   char buffy[128];
 
   cout << "Hello World!\n";
   cin >> buffy;
 }
 

sur la console j'ai

Code:

[jean@ EssaiC++Project]$ gcc toto.cc
toto.cc:11:4: warning: no newline at end of file
/tmp/cccVL0xC.o(.text+0x1c): In function `main':
: undefined reference to `std::cout'
/tmp/cccVL0xC.o(.text+0x21): In function `main':
: 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*)'
/tmp/cccVL0xC.o(.text+0x33): In function `main':
: undefined reference to `std::cin'
/tmp/cccVL0xC.o(.text+0x38): In function `main':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >& std::operator>><char, std::char_traits<char> >(std::basic_istream<char, std::char_traits<char> >&, char*)'
/tmp/cccVL0xC.o(.text+0x64): In function `__static_initialization_and_destruction_0(int, int)':
: undefined reference to `std::ios_base::Init::Init[in-charge]()'
/tmp/cccVL0xC.o(.text+0x93): In function `__tcf_0':
: undefined reference to `std::ios_base::Init::~Init [in-charge]()'
/tmp/cccVL0xC.o(.eh_frame+0x11): undefined reference to `__gxx_personality_v0'
collect2: ld returned 1 exit status
[jean@ EssaiC++Project]$

je ne comprends pas bien les erreurs.
Merci beaucoup pour votre aide