Code::Blocks Forums

Hello,

I am trying to get this program working




#include <iostream>
#include <thread>
#include <future>

using namespace std;

void initiazer(std::promise<int> * promObj)
{
    std::cout<<"Inside Thread"<<std::endl;     promObj->set_value(35);
}

int main()
{
    std::promise<int> promiseObj;
    std::future<int> futureObj = promiseObj.get_future();
    std::thread th(initiazer, &promiseObj);
    std::cout<<futureObj.get()<<std::endl;
    th.join();
    return 0;
}






terminate called after throwing an instance of 'std::system_error'
  what():  Enable multithreading to use std::thread: Operation not permitted
Aborted

Process returned 134


I went to PROJECT --> BUILD OPTIONS  --> [Select project name in top left] -->  Check -std=c++11

then under

LINKER SETTINGS --> OTHER LINKER OPTIONS --> I typed -pthread


Why wont this application compile?

Thanks in advance

Please read this FAQ http://wiki.codeblocks.org/index.php?title=FAQ-Compiling_%28general%29#Q:_How_do_I_report_a_compilation_problem_on_the_forums.3F (http://wiki.codeblocks.org/index.php?title=FAQ-Compiling_%28general%29#Q:_How_do_I_report_a_compilation_problem_on_the_forums.3F)
And, the rules. http://forums.next.codeblocks.org/index.php/topic,9996.0.html (http://forums.next.codeblocks.org/index.php/topic,9996.0.html)

And, if you think it is within the rules post at least a full rebuild log in code tags.

Note: I do NOT do C++ threading; but, your error looks more like a run-time message instead of a compiler/linker message.

Tim S.

http://stackoverflow.com/questions/19463602/compiling-multithread-code-with-g

It's not related to CodeBlocks

Yves

Quote from: yvesdm3000 on January 25, 2017, 07:24:43 AM
http://stackoverflow.com/questions/19463602/compiling-multithread-code-with-g

It's not related to CodeBlocks

Yves

Thank you for the response.  I realize this is not related to code blocks directly but my question is how do I configure codeblocks with these options.

I saw the thread that you posted before I created this thread.

I go to PROJECT --> BUILD OPTIONS --> [Select project name in top left] --> OTHER COMPILER OPTIONS -->
In the box i append one of the following (I have tried all 3 and none work)


-pthread -lpthread -Wl,--no-as-needed


or


-Wl,--no-as-needed


or


-Wl,--no-as-needed -lpthread


Am I typing this in the correct spot?  my g++ is 4.8.4

Thanks to any information you guys can provide

If i bypass codeblocks completely then it works


$ g++ -c main.cpp -pthread -std=c++11
$ g++ main.o -o main.out -pthread -std=c++11
$ ./main.out
Inside Thread
35



this code will compile in codeblocks but the program will not execute (it gives the original error)




EDIT:
clean your project and it will work

The options you want to add are linker options, not compiler options, so you need to add them in the linker tab in your settings, not compiler tab.