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Editorial Team
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Asked: 2026-05-16T06:53:50+00:00

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

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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.

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  1. Editorial Team

    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.

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