What are the correct link options to use std::thread in GCC under linux?

Question

Hi I am trying to use std::thread with G++. Here is my test code

#include <thread> #include <iostream>  int main(int, char **){     std::thread tt([](){ std::cout<<"Thread!"<<std::endl; });     tt.join(); } 

It compiles, but when I try to run it the result is:

terminate called after throwing an instance of 'std::system_error'   what():  Operation not permitted  Aborted 

My compiler version:

$ g++ --version g++ (Ubuntu/Linaro 4.6.1-9ubuntu3) 4.6.1 Copyright (C) 2011 Free Software Foundation, Inc. This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 

What is wrong with my test code?

UPDATE: I use the following command line to compile and run my code.

$ g++ -std=c++0x test.cpp $ ./a.out 

and I tried

$ g++ -std=c++0x -lpthread test.cpp $ ./a.out 

still the same.

Answer 1

I think on Linux pthread is used to implement std::thread so you need to specify the -pthread compiler option.

As this is a linking option, this compiler option need to be AFTER the source files:

$ g++ -std=c++0x test.cpp -pthread 

Answer 2

In addition to using -std=c++0x and -pthread you must not use -static.