问题描述

我只是在尝试g++ 4.6 和C++11 功能.每次我使用 -std=c++0x 标志编译一个简单的线程代码时，它要么因分段错误而崩溃，要么只是抛出一些奇怪的异常.

I am just trying my hands on g++ 4.6 and C++11 features. Every time I compile a simple threading code using -std=c++0x flag, either it crashes with segmentation fault or it just throws some weird exception.

我阅读了一些与 C++11 线程相关的问题，我意识到，我还需要使用 -pthread 标志来正确编译代码.使用 -pthread 工作正常，我能够运行线程代码.

I read some questions related to C++11 threads and I realized that, I also need to use -pthread flag to compile the code properly. Using -pthread worked fine and I was able to run the threaded code.

我的问题是，C++11多线程模型是否在后台使用Pthreads?还是从头开始写的?

My question is, whether the C++11 multi-threading model uses Pthreads in the background? Or is it written from the scratch?

我不知道是否有任何成员是 gcc 贡献者，但我只是好奇.

I don't know if any of the members are gcc contributors but I am just curious.

推荐答案

如果你运行 g++ -v 它会给你一堆关于它是如何配置的信息.其中之一通常是一条看起来像

If you run g++ -v it will give you a bunch of information about how it was configured. One of those things will generally be a line that looks like

Thread model: posix

这意味着它被配置为将 pthreads 用于其线程库(libstdc++ 中的 std::thread)，这意味着您还需要使用系统上 pthreads 可能需要的任何标志(-pthread 在 Linux 上).

which means that it was configured to use pthreads for its threading library (std::thread in libstdc++), and which means you also need to use any flags that might be required for pthreads on your system (-pthread on Linux).

这与标准无关，只是g++如何实现标准的细节

This has nothing specific to do with the standard, its just a detail of how the standard is implemented by g++

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