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

From:
Andy Venikov <swojchelowek@gmail.com>
Newsgroups:
comp.lang.c++
Date:
Sun, 13 Feb 2011 16:12:08 -0500
Message-ID:
<ij9hf8$kag$1@news.eternal-september.org>
On 02/13/2011 01:07 AM, mangesh sawant wrote:

Hi,

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);
  t.join();
  cout<< "ending"<< endl;
  return 0;
}
------------------------------------------------------------------------------------------

When i try to compile this like :
g++ -D_POSIX_TIMEOUTS -D_GLIBCXX__PTHREADS -D_GLIBCXX_HAS_GTHREADS -
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
gcc??


As far as I remember 4.3 did not have support for threads yet.
Experimental support was added in 4.4 but not advertised.
In 4.5 has official incomplete support for threads.

HTH,
   Andy.

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