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#include <iostream>
#include <thread>
 
void foo() {
 
    for (int i = 0; i < 20; ++i) {
        std::cout << "foo" << std::endl;
    }
}
 
 
int main(int argc, char** argv) {
 
    std::thread first(foo);
    for (int i = 0; i < 20; ++i) {
        std::cout << "main" << std::endl;
    }
    first.join();
    return 0;
}

In file included from /usr/include/c++/4.8/thread:35:0,
                 from prog.cpp:2:
/usr/include/c++/4.8/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the ISO C++ 2011 standard. This support is currently experimental, and must be enabled with the -std=c++11 or -std=gnu++11 compiler options.
 #error This file requires compiler and library support for the \
  ^
prog.cpp: In function ‘int main(int, char**)’:
prog.cpp:14:5: error: ‘thread’ is not a member of ‘std’
     std::thread first(foo);
     ^
prog.cpp:14:17: error: expected ‘;’ before ‘first’
     std::thread first(foo);
                 ^
prog.cpp:18:5: error: ‘first’ was not declared in this scope
     first.join();
     ^

Standard output is empty