Error: no type named "shared_ptr" in namespace std

[Caleb P]

I included the <memory> header in my program, and tried to use std::shared_ptr and I get an error that no such type exists, from Clang with -std=c++11 active. GCC gives similar errors. Here's my code:

#include <memory>

int main(int argc, char* args[]) {
	std::shared_ptr<int> somePtr;

	return 0;
};

Clang -v output:

clang version 3.5 (trunk 197674)
Target: x86_64-apple-darwin11.4.2
Thread model: posix

And also, for the other version of Clang I used (from XCode command line tools):

Apple clang version 4.0 (tags/Apple/clang-421.0.60) (based on LLVM 3.1svn)
Target: x86_64-apple-darwin11.4.2
Thread model: posix

What's happening? I can even go into the include headers and see where it has, on line 460 of boost_shared_ptr (which gets included when I #include <memory>), a declaration of shared_ptr. Why isn't the compiler recognizing shared_ptr?

[ne555]

Compile with `-std=c++11' flag

[Caleb P]

Already did, but still no luck.

[JLBorges]

Compile with -stdlib=libc++.
(Ask clang to use its own standard library instead of an old GNU standard library)

For instance:
> clang++ -std=c++11 -stdlib=libc++ -Wall -Wextra -pedantic-errors my_program.cc

[xismn]

What about std::tr1::shared_ptr?
EDIT* I'm stupid

[Caleb P]

Compile with -stdlib=libc++.

Worked!