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