在 linux 下的 GCC 中使用 std::thread 的正确链接选项是什么?

2021-12-06 00:00:00 multithreading g++ c++ c++11

我正在尝试将 std::thread 与 G++ 一起使用.这是我的测试代码

Hi I am trying to use std::thread with G++. Here is my test code

#include <thread>
#include <iostream>

int main(int, char **){
    std::thread tt([](){ std::cout<<"Thread!"<<std::endl; });
    tt.join();
}

它可以编译，但是当我尝试运行它时，结果是:

It compiles, but when I try to run it the result is:

terminate called after throwing an instance of 'std::system_error'
  what():  Operation not permitted 
Aborted

我的编译器版本:

$ g++ --version
g++ (Ubuntu/Linaro 4.6.1-9ubuntu3) 4.6.1
Copyright (C) 2011 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

我的测试代码有什么问题?

What is wrong with my test code?

更新:我使用以下命令行来编译和运行我的代码.

UPDATE: I use the following command line to compile and run my code.

$ g++ -std=c++0x test.cpp
$ ./a.out

我试过了

$ g++ -std=c++0x -lpthread test.cpp
$ ./a.out

还是一样.

推荐答案

我觉得在Linux上pthread是用来实现std::thread的，所以需要指定-pthread代码>编译器选项.

I think on Linux pthread is used to implement std::thread so you need to specify the -pthread compiler option.

因为这是一个链接选项，所以这个编译器选项需要在源文件之后:

As this is a linking option, this compiler option need to be AFTER the source files:

$ g++ -std=c++0x test.cpp -pthread

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