GCC std::thread not found in namespace std

Question

I am using GCC 4.5.0 with the Eclipse IDE (if that matters) on Windows via MinGW.

I'm using the -std=c++0x flag.

I find that _GLIBCXX_HAS_GTHREADS still isn't defined, so thread for me still isn't a member of namespace std. -- or perhaps it is something else.

What does one do to get C++11 threading support with GCC?

P.S. It doesn't recognize the -pthread flag. I read in a question elsewhere on this site that this works.

Edit: Stupid me: pthread is a library, not an option. It's installed, gcc can find the header, but still no cigar.

Yes, how else did I find that macro? Edit: Checked again. I am definitely including it. It still complains that "thread" isn't a member of std. — defube, Aug 05 '10 at 13:13

Cubbi · Accepted Answer · 2010-08-05T16:44:10.023

Works fine on Linux (g++ -std=c++0x -lpthread with no additional defines).

However, this thread on Cygwin mailing list suggests that, at least as of 4.4, _GLIBCXX_HAS_GTHREADS was disabled by an autoconf test when building libstdc++ because pthread implementation of cygwin is missing pthread_mutex_timedlock. Perhaps MinGW has the same problem.

Also, this thread on comp.lang.c++.moderated says the same thing. Not supported by the library.

score 4 · Answer 2 · answered Aug 31 '11 at 14:21

4

The native Windows builds of gcc do not support the new C++0x/C++11 thread library.

The (commercial) Just::Thread library adds support to the TDM port of gcc 4.5.2 for Windows, as well as MSVC.

answered Aug 31 '11 at 14:21

Anthony Williams

66,628
14
133
155

score 3 · Answer 3 · answered Dec 11 '14 at 11:46

3

There is already a lightweight header-only library that implements std::thread and sync primitives in pure win32 API: https://github.com/meganz/mingw-std-threads

IT should work with any version of MinGW that has proper C++11 support.

answered Dec 11 '14 at 11:46

Alexander Vassilev

1,399
13
23

score 3 · Answer 4 · answered Aug 05 '10 at 13:51

3

What does one do to get C++0x threading support with GCC?

Use Boost? Seriously http://gcc.gnu.org/onlinedocs/libstdc++/manual/status.html claims threads aren't complete even in mainline head so it isn't going to be in any current release.

answered Aug 05 '10 at 13:51

stonemetal

6,111
23
25

Yes, I know about boost and I don't mind using it. I also know that gcc support for C++0x is currently experimental. I was just curious as to why it didn't work with mine when it worked with apparently older versions (which I have tried, and still end up getting the same message). – defube Aug 05 '10 at 13:56

score 3 · Answer 5 · answered Oct 30 '11 at 12:57

3

Use this builts of mingw: http://code.google.com/p/mingw-builds/downloads/list

answered Oct 30 '11 at 12:57

niXman

1,698
3
16
40

GCC std::thread not found in namespace std

5 Answers5

Linked

Related