G++ compiler: option -s is obsolete and being ignored C++

I'm trying to compile and strip a very simple program in C++ with the g++ compiler (4.6.0 on Mac OSX). But while compiling i get a warning.

source code:

#include </usr/local/Cellar/gcc/4.6.0/gcc/include/c++/4.6.0/iostream>

int main(){
    std::cout << ("Hello World\n") ;
}

Terminal code:

g++ hello.cc -Wall -std=c++0x -s
    /* or an alternative: */
g++ hello.cc -Wall -std=c++0x -o test -Wl,-s

Compiler warning:

ld: warning: option -s is obsolete and being ignored

Somebody any idea's about this weird warning?

Edit:

The weird thing is the size does decrease when using the -s flag, the decreases from 9,216 bytes to 9,008.

However when i use the following the size decreases to 8,896 bytes.

cp hello hello_stripped
strip hello_stripped