C++ CodeLite Enable Multithreading? - c++

Question

I'm experiencing a bit of strange behaviour when I try to compile any program that uses multithreading in CodeLite.
I get the error:
terminate called after throwing an instance of 'std::system_error'
what(): Enable multithreading to use std::thread: Operation not premitted.
after some quick googling I found out I had to add "-pthread" to the compiler options.
Note: that CodeLite puts -l in front of libraries, so it does use -lpthread
After I clean, and rebuild the project, I still get the error though. As far as I can tell the build log looks fine?
The truly frustrating part comes about when I compile it manually via the command line, It works just fine.
I've searched, but none of the solutions seem to work for me? perhaps I've missed a step somewhere?
here's my test code.
I should also note I'm using Ubuntu14.04, and CodeLite 9.1.0
#include <iostream>
#include <string>
#include <thread>
void test()
{
std::cout << " Look it works! \n";
}
void int main(int argc, char** argv)
{
std::thread thrd_1 = std::thread(test);
thrd_1.join();
return 0;
}
Any help would be greatly appreciated!

Answer 1

You are passing -pthread in the compiler options. You need to pass it
in the linker options, and in the linker options you do not need
to specify pthread as a library. The -pthread option means
do whatever it is that links the posix threads library on this platform.
$ g++ -c -O0 -std=c++11 -o main.o main.cpp
$ g++ -o threadtest -pthread main.o
$ ./threadtest
Look it works!