boost库学习：多线程编程报错：对‘boost::thread::xxx()’未定义的引用

最近学习boost多线程编程，简单的一个示例：

#include                                        
#include 

void wait(int seconds)
{
  boost::this_thread::sleep(boost::posix_time::seconds(seconds));
}

void thread()
{
  for (int i = 0; i < 5; ++i)
  {
    wait(1);
    std::cout << i << std::endl;
  }
}

int main()
{
  boost::thread t(thread);
  t.join();
}

编译：

g++ -ggdb3 -o test main.cpp

报错如下：

/tmp/ccDDgmyQ.o：在函数‘boost::pthread::cond_init(pthread_cond_t&)’中：
/usr/local/include/boost/thread/pthread/pthread_helpers.hpp:28：对‘pthread_condattr_setclock’未定义的引用
/tmp/ccDDgmyQ.o：在函数‘boost::detail::thread_data_base::thread_data_base()’中：
/usr/local/include/boost/thread/pthread/thread_data.hpp:159：对‘vtable for boost::detail::thread_data_base’未定义的引用
/tmp/ccDDgmyQ.o：在函数‘boost::detail::interruption_checker::interruption_checker(pthread_mutex_t*, pthread_cond_t*)’中：
/usr/local/include/boost/thread/pthread/thread_data.hpp:204：对‘boost::detail::get_current_thread_data()’未定义的引用
/tmp/ccDDgmyQ.o：在函数‘boost::thread::start_thread()’中：
/usr/local/include/boost/thread/detail/thread.hpp:179：对‘boost::thread::start_thread_noexcept()’未定义的引用
/tmp/ccDDgmyQ.o：在函数‘boost::thread::~thread()’中：
/usr/local/include/boost/thread/detail/thread.hpp:254：对‘boost::thread::detach()’未定义的引用
/tmp/ccDDgmyQ.o：在函数‘boost::thread::get_id() const’中：
/usr/local/include/boost/thread/detail/thread.hpp:719：对‘boost::thread::native_handle()’未定义的引用
/tmp/ccDDgmyQ.o：在函数‘boost::thread::join()’中：
/usr/local/include/boost/thread/detail/thread.hpp:745：对‘boost::thread::join_noexcept()’未定义的引用
/tmp/ccDDgmyQ.o：在函数‘boost::condition_variable::wait(boost::unique_lock&)’中：
/usr/local/include/boost/thread/pthread/condition_variable.hpp:94：对‘boost::this_thread::interruption_point()’未定义的引用
/tmp/ccDDgmyQ.o：在函数‘boost::condition_variable::do_wait_until(boost::unique_lock&, boost::detail::mono_platform_timepoint const&)’中：
/usr/local/include/boost/thread/pthread/condition_variable.hpp:137：对‘boost::this_thread::interruption_point()’未定义的引用
/tmp/ccDDgmyQ.o：在函数‘boost::detail::thread_data::~thread_data()’中：
/usr/local/include/boost/thread/detail/thread.hpp:91：对‘boost::detail::thread_data_base::~thread_data_base()’未定义的引用
/tmp/ccDDgmyQ.o:(.rodata._ZTIN5boost6detail11thread_dataIPFvvEEE[_ZTIN5boost6detail11thread_dataIPFvvEEE]+0x10)：对‘typeinfo for boost::detail::thread_data_base’未定义的引用
collect2: error: ld returned 1 exit status

看到最后的collect2: error: ld returned 1 exit status，猜测应该是库链接的问题。

到 /usr/local/lib 查看boost相关的库，搜索带 thread 字眼的，有 libboost_thread.a 和 libboost_thread.so，于是改成：

g++ -ggdb3 -o test main.cpp -lboost_thread

还有报错：

/usr/bin/ld: /tmp/ccy7VvkP.o: undefined reference to symbol 'pthread_condattr_setclock@@GLIBC_2.3.3'
//lib/x86_64-linux-gnu/libpthread.so.0: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status

看来还是库链接问题，从错误提示 libpthread.so.0，再百度一下，原来boost库链接必须指定POSIX线程库,否则无法找到pthread函数库的函数实现，于是改成：

g++ -ggdb3 -o test main.cpp -lboost_thread -lpthread

就ok了~

 

参考：

Boost 编译及boost::thread静态链接使用