链接到boost_thread的问题 [英] Problem linking to boost_thread

问题描述

我试图链接到boost 1.47在xubuntu与gcc4.6和glibc 2.13。到目前为止我无法编译以下简单的程序，main.cpp：

  #include< cstdlib> 
 #include< boost / ref.hpp> 
 #include< boost / thread.hpp> 
 int main（）{
 size_t n_threads = boost :: thread :: hardware_concurrency（）; 
 return 0; 
} 
  

当我编译时：

$ b b

  g ++ -lboost_thread -lboost_regex -o mc main.cpp -static -lpthread /usr/local/lib/libboost_regex.a /usr/local/lib/libboost_thread.a 
  

我得到一大堆错误，类似于以下内容：

  /usr/local/lib/libboost_thread.a（thread.o）：在函数`_ZN5boost9call_onceIPFvvEEEvRNS_9once_flagET_.constprop.100'：
 thread.cpp :(。文本+ 0x47）：未定义引用`pthread_mutex_lock'
 thread.cpp :(。text + 0x73）：未定义引用`pthread_cond_wait'
 thread.cpp :(。+ 0xb9）：未定义引用`pthread_mutex_unlock'
 thread.cpp :(。text + 0xc8）：未定义引用`pthread_key_create'
 thread.cpp :( .text + 0xd2）：未定义引用`pthread_mutex_lock'
 thread .cpp :( .text + 0xf5）：未定义引用`pthread_cond_broadcast'
 thread.cpp :(。text + 0x10e）：未定义引用`pthread_mutex_unlock'
  pre> 
 
 
以及：
  / usr / lib / x86_64- linux-gnu / gcc / x86_64-linux-gnu / 4.6.1 / libgcc_eh.a（unwind-dw2.o）：在函数`uw_init_context_1'：
（.text + 0x20bd）：未定义引用`pthread_once' 
 /usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.6.1/libgcc_eh.a(unwind-dw2-fde-glibc.o）：在函数`__register_frame_info_bases'中：
（.text + 0x16d4）：未定义引用`pthread_mutex_lock'
 /usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.6.1/libgcc_eh.a(unwind-dw2- fde-glibc.o）：在函数`__register_frame_info_table_bases'中：
（.text + 0x179b）：未定义的引用`pthread_mutex_lock'
 / usr / lib / x86_64-linux-gnu / gcc / x86_64-linux -gnu / 4.6.1 / libgcc_eh.a（unwind-dw2-fde-glibc.o）：在函数`__deregister_frame_info_bases'中：
（.text + 0x183e）：未定义引用`pthread_mutex_lock'
 / usr / lib / x86_64-linux-gnu / gcc / x86_64-linux-gnu / 4.6.1 / libgcc_eh.a（unwind-dw2-fde-glibc.o）：在函数`__deregister_frame_info_bases'：
 + 0x18c6）：未定义引用`pthread_mutex_unlock'
 /usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.6.1/libgcc_eh.a(unwind-dw2-fde-glibc.o ）：在函数`_Unwind_Find_FDE'中：
（.text + 0x1976）：未定义引用`pthread_mutex_lock'
 /usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.6。 1 / libgcc_eh.a（unwind-dw2-fde-glibc.o）：在函数`_Unwind_Find_FDE'中：
（.text + 0x19c7）：未定义引用`pthread_mutex_unlock'
 / usr / lib / x86_64 -linux-gnu / gcc / x86_64-linux-gnu / 4.6.1 / libgcc_eh.a（unwind-dw2-fde-glibc.o）：在函数`__register_frame_info_bases'：
（.text + 0x16f3）：undefined引用`pthread_mutex_unlock'
 /usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.6.1/libgcc_eh.a(unwind-dw2-fde-glibc.o）：在函数` __register_frame_info_table_bases'：
（.text + 0x17ba）：未定义引用`pthread_mutex_unlock'
 collect2：ld返回1退出状态
  
这会导致什么问题？ 
我在这里提供了足够的信息吗？ 
解决方案
尝试将-lpthread移动到最后一个参数到链接器。 查看此链接 
 
I'm trying to link with boost 1.47 on xubuntu with gcc4.6 and glibc 2.13. So far I can't compile the following simple program, main.cpp:
#include <cstdlib>
#include <boost/ref.hpp>
#include <boost/thread.hpp>
int main() {
    size_t n_threads = boost::thread::hardware_concurrency();
    return 0;
}
when I compile with:
    g++ -lboost_thread -lboost_regex -o mc main.cpp -static -lpthread /usr/local/lib/libboost_regex.a /usr/local/lib/libboost_thread.a
I get a bunch of errors from boost similar to the following:
/usr/local/lib/libboost_thread.a(thread.o): In function `_ZN5boost9call_onceIPFvvEEEvRNS_9once_flagET_.constprop.100':
thread.cpp:(.text+0x47): undefined reference to `pthread_mutex_lock'
thread.cpp:(.text+0x73): undefined reference to `pthread_cond_wait'
thread.cpp:(.text+0xb9): undefined reference to `pthread_mutex_unlock'
thread.cpp:(.text+0xc8): undefined reference to `pthread_key_create'
thread.cpp:(.text+0xd2): undefined reference to `pthread_mutex_lock'
thread.cpp:(.text+0xf5): undefined reference to `pthread_cond_broadcast'
thread.cpp:(.text+0x10e): undefined reference to `pthread_mutex_unlock'
and also:
/usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.6.1/libgcc_eh.a(unwind-dw2.o): In function `uw_init_context_1':
(.text+0x20bd): undefined reference to `pthread_once'
/usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.6.1/libgcc_eh.a(unwind-dw2-fde-glibc.o): In function `__register_frame_info_bases':
(.text+0x16d4): undefined reference to `pthread_mutex_lock'
/usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.6.1/libgcc_eh.a(unwind-dw2-fde-glibc.o): In function `__register_frame_info_table_bases':
(.text+0x179b): undefined reference to `pthread_mutex_lock'
/usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.6.1/libgcc_eh.a(unwind-dw2-fde-glibc.o): In function `__deregister_frame_info_bases':
(.text+0x183e): undefined reference to `pthread_mutex_lock'
/usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.6.1/libgcc_eh.a(unwind-dw2-fde-glibc.o): In function `__deregister_frame_info_bases':
(.text+0x18c6): undefined reference to `pthread_mutex_unlock'
/usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.6.1/libgcc_eh.a(unwind-dw2-fde-glibc.o): In function `_Unwind_Find_FDE':
(.text+0x1976): undefined reference to `pthread_mutex_lock'
/usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.6.1/libgcc_eh.a(unwind-dw2-fde-glibc.o): In function `_Unwind_Find_FDE':
(.text+0x19c7): undefined reference to `pthread_mutex_unlock'
/usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.6.1/libgcc_eh.a(unwind-dw2-fde-glibc.o): In function `__register_frame_info_bases':
(.text+0x16f3): undefined reference to `pthread_mutex_unlock'
/usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.6.1/libgcc_eh.a(unwind-dw2-fde-glibc.o): In function `__register_frame_info_table_bases':
(.text+0x17ba): undefined reference to `pthread_mutex_unlock'
collect2: ld returned 1 exit status
What would be causing a problem like this?
Have I provided enough information here?
Any advice for fixing this is greatly appreciated!
解决方案
Try moving the "-lpthread" to be the last argument to the linker.  See this link

                        
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