boost :: program_options未定义的引用

Question

我使用的是ubuntu 10.04和libboost1.40.

ls -l /usr/lib | grep boost_pro
    -rw-r--r--  1 root root   640800 2010-04-01 05:19 libboost_program_options.a
    lrwxrwxrwx  1 root root       26 2011-11-03 22:40 libboost_program_options-mt.a ->                  libboost_program_options.a
    lrwxrwxrwx  1 root root       34 2011-11-03 22:40 libboost_program_options-mt.so ->                libboost_program_options.so.1.40.0
    lrwxrwxrwx  1 root root       34 2011-11-03 22:40 libboost_program_options.so ->    libboost_program_options.so.1.40.0
    -rw-r--r--  1 root root   289336 2010-04-01 05:19 libboost_program_options.so.1.40.0

这是main.cpp(仅用于测试)

     #include <string> 
#include <iostream> 
#include <boost/date_time/gregorian/gregorian.hpp> 
#include <boost/date_time/posix_time/posix_time.hpp>
#include <boost/program_options/options_description.hpp>
//--------------------------------------------------------------------- 
int main(int argc,char** argv) 
{ 
 boost::gregorian::date now(boost::gregorian::day_clock::local_day());
 //is works fine 
 std::cout<<boost::gregorian::to_iso_string(now)<<std::endl;
 boost::program_options::options_description a; //but here i get an error when the                constructor have started
 return 0; 
 }

    g++ -o main -lboost_date_time -lboost_program_options   main.cpp && ./main
    /tmp/cc3RJHsG.o: In function `main':
    main.cpp:(.text+0x81): undefined reference to   `boost::program_options::options_description::options_description(unsigned int, unsigned     int)'
    collect2: ld returned 1 exit status

我做

    find /usr/include/ -name "*description*"
/usr/include/boost/program_options/options_description.hpp

并且只有一个原型.有任何想法吗？

Answer 1

显然,有一个两个arg构造函数的原型需要两个unsigned ints,两者都有一个默认值.因此,这将成为a创建时使用的默认构造函数.这是这个构造函数:

  options_description(unsigned = m_default_line_length, 
                      unsigned = m_default_line_length/2);

但是,这是在Boost 1.42中添加的,并且在您的版本1.40 中不存在.

所以我认为你设法覆盖Ubuntu为你安装的标头,使用更新版本,但没有更新库/usr/lib.尝试卸载并重新安装该程序包.

如果你需要比1.40更新的加速,无论是升级你的Ubuntu,或卸载所有升压相关的软件包,并从源代码重新安装在/usr/local.包管理器将远离任何内容/usr/local,因此这将确保不再发生此类问题.