我使用的g++版本是g++ 4.4.3
升级到4.7版本：
add-apt-repository ppa:ubuntu-toolchain-r/test
apt-get update
apt-get install gcc-4.7-base
apt-get install gcc-4.7
apt-get install g++-4.7
update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.6 60 --slave /usr/bin/g++ g++ /usr/bin/g++-4.6
update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.7 40 --slave /usr/bin/g++ g++ /usr/bin/g++-4.7
update-alternatives --config gcc
重新编译：
g++ -std=c++0x A.cpp -o a
再次运行./a或者/tmp/a
再次错误：terminate called after throwing an instance of 'std::system_error'
what():Enable multithreading to use std::thread: Operation not permitted
Aborted
解决方法：
g++ -std=c++0x -pthread A.cpp -o a
再次运行./a或者/tmp/a
运行成功：
Launched from the main
Launched by thread 3
Launched by thread 4
Launched by thread 5
Launched by thread 6
Launched by thread 7
Launched by thread 8
Launched by thread 9
Launched by thread 2
Launched by thread 1
Launched by thread 0
代码例子：
#include <iostream>
#include <thread>
static const int num_threads = 10;
//This function will be called from a thread
void call_from_thread(int tid) {
std::cout << "Launched by thread " << tid << std::endl;
}
int main() {
std::thread t[num_threads];
//Launch a group of threads
for (int i = 0; i < num_threads; ++i) {
t[i] = std::thread(call_from_thread, i);
}
std::cout << "Launched from the main\n";
//Join the threads with the main thread
for (int i = 0; i < num_threads; ++i) {
t[i].join();
}
return 0;
}
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