How to compile C++ with C++11 support in Mac Terminal

Question

I wanted to compile C++11 source code within Mac Terminal but failed. I tried g++ -std=c++11, g++ -std=c++0x, g++ -std=gnu++11 and

Answer 1

XCode uses clang and clang++ when compiling, not g++ (assuming you haven't customized things). Instead, try:

$ cat t.cpp
#include 

int main()
{
    int* p = nullptr;
    std::cout << p << std::endl;
}
$ clang++ -std=c++11 -stdlib=libc++ t.cpp
$ ./a.out 
0x0

Thanks to bames53's answer for pointing out that I had left out -stdlib=libc++.

If you want to use some GNU extensions (and also use C++11), you can use -std=gnu++11 instead of -std=c++11, which will turn on C++11 mode and also keep GNU extensions enabled.