/usr/include/boost/filesystem/path.hpp:307:未定义对'boost::files

Question

我有一些代码，当我编译它时，我得到了以下错误，我不知道如何解决它。我尝试添加-L/usr/lib/x86_64-linux-gnu，-lboost_system和-lboost_filesystem，但我仍然得到同样的错误。我不知道现在如何解决这个问题，如果有人可以帮忙？

Agent.o: In function `boost::filesystem::path::append(char const*, std::codecvt<wchar_t, char, __mbstate_t> const&)':
/usr/include/boost/filesystem/path.hpp:307: undefined reference to `boost::filesystem::path::operator/=(char const*)'
Agent.o: In function `boost::filesystem::exists(boost::filesystem::path const&)':
/usr/include/boost/filesystem/operations.hpp:289: undefined reference to `boost::filesystem::detail::status(boost::filesystem::path const&, boost::system::error_code*)'
Agent.o: In function `boost::filesystem::create_directories(boost::filesystem::path const&)':
/usr/include/boost/filesystem/operations.hpp:399: undefined reference to `boost::filesystem::detail::create_directories(boost::filesystem::path const&, boost::system::error_code*)'
Agent.o: In function `boost::enable_if<boost::filesystem::path_traits::is_pathable<boost::decay<char [256]>::type>, boost::filesystem::path&>::type boost::filesystem::path::operator/=<char [256]>(char const (&) [256])':
/usr/include/boost/filesystem/path.hpp:302: undefined reference to `boost::filesystem::path::codecvt()'
collect2: error: ld returned 1 exit status
make: *** [player] Error 1

相关代码如下

bool Agent::openTupleLog()
{
 std::string dir="~/Experiments/Nov/";
 // create the log directory & file path string

try
{
    boost::filesystem::path kaway_log( dir
#if defined(BOOST_FILESYSTEM_VERSION) && BOOST_FILESYSTEM_VERSION == 2
#  ifndef BOOST_FILESYSTEM_NO_DEPRECATED
                                       , &boost::filesystem::native
#  endif
#endif
                                       );
    if ( ! boost::filesystem::exists( kaway_log )
         && ! boost::filesystem::create_directories( kaway_log ) )
    {
        std::cerr << __FILE__ << ": " << __LINE__
                  << ": can't create log directory '"
                  << kaway_log.BOOST_FS_DIRECTORY_STRING() << "'" << std::endl;
        return false;
    }
    kaway_log /= tuplesFilename;

   M_kaway_log_name = kaway_log.BOOST_FS_FILE_STRING();
}
catch ( std::exception & e )
{
    std::cerr << __FILE__ << ": " << __LINE__
              << " Exception caught! " << e.what()
              << "nCould not create log directory '"
              << dir
              << "'" << std::endl;
    return false;
}
// open the output file stream
M_kaway_log.open( M_kaway_log_name.c_str() );
if ( ! M_kaway_log.is_open() )
{
    std::cerr << __FILE__ << ": " << __LINE__
              << ": can't open log_file " << M_kaway_log_name
              << std::endl;
    return false;
}
return true;

}

Answer 1

问题解决了。

我问了一个朋友，他告诉我在命令末尾添加/usr/lib/x86_64-linux-gnu/libboost_filesystem.a -lboost_filesystem -lboost_system，然后它就可以了。他说：

放置这些标志的顺序是依赖的，因此我必须将 .a 移到最后。然后它要求boost_system，因此我附加了 -lboost_system 为了它的乐趣。

请注意，它是libboost_filesystem.a，而不是libboost_filesystem.so