gcc 4.8.2 on Linux - Simple program using thread crashes

Question

I have just installed gcc 4.8.2 on Centos (I am using devtoolset-2). I wrote a very simple program using thread. It compiles fine but crashes when executed?

 #include <thread>
 #include <iostream>

 void test() 
 { 
   std::cout << "test\n"; 
 }

 void main()
 {
      std::thread t(test);
      t.join();
      return 0;
 }

I compile with:

 scl enable devtoolset-2 bash
 c++ -o test test.cpp -std=c++11

I am terribly surprised. I must do something wrong, not using the write libc++ etc? Do you have any idea how I could debug this. Thank you! I compile it on Mac (Maverick) which obviously doesn't use gcc and it works fine.

Try adding the command line option `-pthread` -- and of course also `-Wall`. — nosid, Jun 29 '14 at 15:01
That worked thank you so much, I didn't know on Linux you still needed to use pthread with thread? Thank you very much. — user18490, Jun 29 '14 at 15:05
I voted up the question despite of not checking the GCC docs for thread options, because it shows a nice basic test case, complete unlike most questions of this nature. — Rob11311, Jun 29 '14 at 15:29
Thanks Rob, I didn't think about checking the docs indeed, but your comment is helpful and I will do it next time. — user18490, Jun 29 '14 at 16:10

score 3 · Accepted Answer · edited May 23 '17 at 12:20

On Linux, you should use the command line option -pthread with GCC and Clang for compiling and linking. In your case, the command line should look as follows:

g++ -std=c++11 -Wall -Wextra -pthread test.cpp -o test

See the following links for more information:

gcc 4.8.2 on Linux - Simple program using thread crashes

1 Answers1