Thread doesn't work with an error: Enable multithreading to use std::thread: Operation not permitted

Question

I created and executed a simple thread on my system. when I execute this program, I have the error message : Enable multithreading to use std::thread: Operation not permitted

some details about my system :

• linux ubuntu 13.10
• g++ 4.8.1

I compile the source code including the library pthread

The source code:

#include <iostream> #include <thread>   using namespace std;  void func(void) {   cout << "test thread" << endl; }   int main() {   cout << "start" << endl;   thread t1 (func);    t1.join();    cout << "end" << endl;    return 0; } 

Answer 1

It seems that you are trying to use C++11 threads. If it is true, then

1. correct #include <thread> and #include <iostream>, i.e. do not use " in these lines and add # in front of them.
2. compile with g++ -std=c++11 q.cpp -lpthread (dependency order matters for newer g++)

Hint: when you are using threads in a static linked library and use this library in an executable, then you have to add the flag -pthread to the link command for the executable. Example:

g++ Obj1.o Obj2.o MyStaticLib.a -o MyExecutable -pthread