[英]Undefined symbols for architecture x86_64 with C++ Boost threads
I am new to the Boost C++ library and I was trying to run this simple program that utilizes threads 我是Boost C ++库的新手,我试图运行这个利用线程的简单程序
#include <boost/thread.hpp>
#include <iostream>
using namespace std;
void wait(int seconds)
{
boost::this_thread::sleep(boost::posix_time::seconds(seconds));
}
void threadAction()
{
int i;
for(i=0;i<5;i++)
{
wait(1);
cout << i << endl;
}
}
int main()
{
boost::thread myThread(threadAction);
myThread.join();
}
However, when I tried to compile it, terminal spit this back at me: 但是,当我尝试编译它时,终端将其吐给我:
Undefined symbols for architecture x86_64:
"boost::this_thread::hiden::sleep_until(timespec const&)", referenced from:
boost::this_thread::sleep(boost::posix_time::ptime const&) in simpleThreadExample-b4b0cd.o
"boost::detail::thread_data_base::~thread_data_base()", referenced from:
boost::detail::thread_data<void (*)()>::~thread_data() in simpleThreadExample-b4b0cd.o
"boost::system::system_category()", referenced from:
___cxx_global_var_init2 in simpleThreadExample-b4b0cd.o
boost::thread_exception::thread_exception(int, char const*) in simpleThreadExample-b4b0cd.o
"boost::system::generic_category()", referenced from:
___cxx_global_var_init in simpleThreadExample-b4b0cd.o
___cxx_global_var_init1 in simpleThreadExample-b4b0cd.o
"boost::thread::join_noexcept()", referenced from:
boost::thread::join() in simpleThreadExample-b4b0cd.o
"boost::thread::native_handle()", referenced from:
boost::thread::get_id() const in simpleThreadExample-b4b0cd.o
"boost::thread::start_thread_noexcept()", referenced from:
boost::thread::start_thread() in simpleThreadExample-b4b0cd.o
"boost::thread::detach()", referenced from:
boost::thread::~thread() in simpleThreadExample-b4b0cd.o
"typeinfo for boost::detail::thread_data_base", referenced from:
typeinfo for boost::detail::thread_data<void (*)()> in simpleThreadExample-b4b0cd.o
"vtable for boost::detail::thread_data_base", referenced from:
boost::detail::thread_data_base::thread_data_base() in simpleThreadExample-b4b0cd.o
NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
and I'm not sure why. 我不知道为什么。
If it helps, I installed the library in my 如果有帮助,我将库安装在
/usr/local directory
and use 和使用
g++ -std=c++11 -I /usr/local/boost_1_57_0 main.cpp
to compile my program 编译我的程序
It's probably something really simple and small (like I forgot a header file) that I just overlooked, but I can't seem to find it. 它可能只是我刚刚忽略的真正简单而小的内容(例如我忘记了头文件),但似乎找不到它。 If anyone has any insight, that would be brilliant!
如果有人有任何见识,那就太好了! Thanks!
谢谢!
As a quick fix, you could explicitly provide the Boost components that are required. 作为快速解决方案,您可以显式提供所需的Boost组件。 In your case, use the following in your CMakeLists.txt file:
在您的情况下,请在CMakeLists.txt文件中使用以下命令:
FIND_PACKAGE( Boost COMPONENTS thread REQUIRED ) FIND_PACKAGE(需要Boost COMPONENTS线程)
Try using: -lboost_thread-mt
, works fine in my case. 尝试使用:
-lboost_thread-mt
,在我的情况下效果很好。
For ex: 例如:
g++ -O3 -stdlib=libc++ -std=c++11 -lboost_thread-mt < File-name >.cpp -o < Binary-Name >
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.