Cygwin

[andrew@andrew other]$ cat > hello.cpp
#include <iostream>
int main(){
    std::cout << "Hello world!" << std::endl;
    return 0;
}
[andrew@andrew other]$ gcc -o hello hello.cpp
/tmp/ccpzSZmI.o: In function `main':
hello.cpp:(.text+0x14): undefined reference to `std::cout'
hello.cpp:(.text+0x19): 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*)'
hello.cpp:(.text+0x21): 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> >&)'
hello.cpp:(.text+0x29): undefined reference to `std::basic_ostream<char, std::char_traits<char> >::operator<<(std::basic_ostream<char, std::char_traits<char> >& (*)(std::basic_ostream<char, std::char_traits<char> >&))'
/tmp/ccpzSZmI.o: In function `__static_initialization_and_destruction_0(int, int)':
hello.cpp:(.text+0x51): undefined reference to `std::ios_base::Init::Init()'
hello.cpp:(.text+0x56): undefined reference to `std::ios_base::Init::~Init()'
/tmp/ccpzSZmI.o:(.eh_frame+0x12): undefined reference to `__gxx_personality_v0'
collect2: выполнение ld завершилось с кодом возврата 1
[andrew@andrew other]$