在Ubuntu 11.10下,与boost_thread的链接失败

Question

我已经更新到新的Ubuntu 11.10.现在的问题是,我正在处理的软件不再链接了.我发现这个 wiki条目似乎描述了这个问题.尽管如此,我无法修复它.为了重现这个问题,我编写了以下小测试程序:

#include <iostream>
#include <boost/thread.hpp>

void blubb() {
  std::cout << "hello world" << std::endl;
}

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

比我使用以下命令编译:

g++ -o test -lboost_thread test.cc

我得到的输出如下:

/tmp/cc0O0dAC.o: In function `main':
test.cc:(.text+0x49): undefined reference to `boost::thread::join()'
test.cc:(.text+0x55): undefined reference to `boost::thread::~thread()'
test.cc:(.text+0x70): undefined reference to `boost::thread::~thread()'
/tmp/cc0O0dAC.o: In function `boost::detail::thread_data_base::thread_data_base()':
test.cc:(.text._ZN5boost6detail16thread_data_baseC2Ev[_ZN5boost6detail16thread_data_baseC5Ev]+0x24):     undefined reference to `vtable for boost::detail::thread_data_base'
/tmp/cc0O0dAC.o: In function `boost::thread::thread<void (*)()>(void (*)(), boost::disable_if<boost::is_convertible<void (*&)(), boost::detail::thread_move_t<void (* ()> >, boost::thread::dummy*>::type)':
test.cc:(.text._ZN5boost6threadC2IPFvvEEET_NS_10disable_ifINS_14is_convertibleIRS4_NS_6detail13thread_move_tIS4_EEEEPNS0_5dummyEE4typeE[_ZN5boost6threadC5IPFvvEEET_NS_10disable_ifINS_14is_convertibleIRS4_NS_6detail13thread_move_tIS4_EEEEPNS0_5dummyEE4typeE]+0x30): undefined reference to `boost::thread::start_thread()'
/tmp/cc0O0dAC.o: In function `boost::detail::thread_data<void (*)()>::~thread_data()':
test.cc:(.text._ZN5boost6detail11thread_dataIPFvvEED2Ev[_ZN5boost6detail11thread_dataIPFvvEED5Ev]+0x1f): undefined reference to `boost::detail::thread_data_base::~thread_data_base()'
/tmp/cc0O0dAC.o:(.rodata._ZTIN5boost6detail11thread_dataIPFvvEEE[typeinfo for boost::detail::thread_data<void (*)()>]+0x10): undefined reference to `typeinfo for boost::detail::thread_data_base'
collect2: ld returned 1 exit status

我还尝试在几个订单中添加-lpthread和-pthread但没有成功.此命令在较旧的Ubuntu版本上运行顺利.我做错了什么(我在PCRE和Google Protocol Buffers方面遇到了类似的问题).

在此先感谢您的帮助!

Answer 1

好吧我修好了它,这太荒谬了:

正如问题中所写

g++ -o test -lboost_thread test.cc

不起作用,但是

g++ -o test test.cc -lboost_thread

...所以不仅库的顺序很重要,而且必须在依赖项之前写入源文件......