c++ g++3.4.5 g++4.8.2 由编译器引起的编译异常

#include <memory>
#include <string>
#include <iostream>

class Student {
public:
    Student(std::string& name) {
        _name = name;
    }
    ~Student(){
    }

    void printName(){
        std::cout << _name << std::endl;
    }

private:
    std::string _name;
};

int main() {
    std::string name = "xiaowang";
    std::unique_ptr<Student> p(new Student(name));
    //Student p = Student(name);
    //p.printName();
    p->printName();

    return ;
}
编译：默认g++3.4.5 报如下错误，unique_ptr是c++11的， g++3.4.5似乎也不支持这个。

main.cpp: In function 'int main()':
main.cpp::: error: 'unique_ptr' is not a member of 'std'
     std::unique_ptr<Student> p(new Student(name));
     ^
main.cpp::: error: expected primary-expression before '>' token
     std::unique_ptr<Student> p(new Student(name));
                            ^
main.cpp::: error: 'p' was not declared in this scope
     std::unique_ptr<Student> p(new Student(name));

后经测试MM提示，改为用 
/opt/compiler/gcc-4.8.2/bin/g++ -std=c++11 main.cpp    （原来系统还藏了个高版本的，郁闷，干嘛不直接用高版本的啊）

编译无误。
                                                 ^