Re: Using thread support provided by c++0x on cygwin.

Saeed Amrollahi <>
Sun, 13 Feb 2011 00:33:52 -0800 (PST)
On Feb 13, 9:07 am, mangesh sawant <> wrote:


I am trying to compile following code using gcc version "g++ (GCC)
4.3.4 20090804 (release) 1" on cygwin


#include <iostream>
#include <thread>
using namespace std;

void hello()
 cout << "Hello Concurrent World!" << endl;


int main()
 cout << "starting" << endl;
 thread t(hello);
 cout << "ending" << endl;
 return 0;}



When i try to compile this like :
enable-auto-import -std=c++0x sample.cpp --lpthread

I get folowing error :

sample.cpp:2:18: error: thread: No such file or directory
sample.cpp: In function `int main()':
sample.cpp:13: error: `thread' was not declared in this scope
sample.cpp:13: error: expected `;' before `t'
sample.cpp:14: error: `t' was not declared in this scope

Can anyone help with this?? Do I need to have a higher version of


I compiled and ran you program under Suse Linux/g++ 4.5.0 with the
   g++ -std=c++0x -pthread thread_test.c++ -o thread_test
It's OK and I got output. Indeed the -pthread options is required.
I compiled and ran the program with your command excluded
enable-auto-import and -lpthread (not two dashes) and it is OK too.
Based on the error messages you received, I think
you don't have thread library and you have to install a newer one.
Mine is good, but the newest version of GCC is 4.5.2.

  -- Saeed Amrollahi

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