Boost che collega riesco

Question

ho il seguente codice che ho sto cercando di compilare:

#include <boost/filesystem/convenience.hpp> 
#include <boost/foreach.hpp> 
#include <boost/range.hpp> 
#include <iostream> 

int main(int, char**) 
{ 
    namespace bf = boost::filesystem; 
    BOOST_FOREACH(bf::path path, 
      boost::make_iterator_range(
       bf::recursive_directory_iterator(bf::path("/home")), 
       bf::recursive_directory_iterator())) { 
     std::cout << path.string() << std::endl; 
    } 
    return 0; 
} 

Biblioteca boost è in/home/pippo/include. e i file include sono effettivamente lì.

quando ho eseguito il seguente:

g++ -I/home/foo/include/ test.cc 

ottengo il seguente errore. come posso risolvere questo. cosa dovrei seguire?

/tmp/ccvDmFNL.o(.text+0x502): In function `__static_initialization_and_destruction_0(int, int)': 
: undefined reference to `boost::system::get_system_category()' 
/tmp/ccvDmFNL.o(.text+0x51b): In function `__static_initialization_and_destruction_0(int, int)': 
: undefined reference to `boost::system::get_generic_category()' 
/tmp/ccvDmFNL.o(.text+0x534): In function `__static_initialization_and_destruction_0(int, int)': 
: undefined reference to `boost::system::get_generic_category()' 
/tmp/ccvDmFNL.o(.text+0x54d): In function `__static_initialization_and_destruction_0(int, int)': 
: undefined reference to `boost::system::get_generic_category()' 
/tmp/ccvDmFNL.o(.text+0x566): In function `__static_initialization_and_destruction_0(int, int)': 
: undefined reference to `boost::system::get_system_category()' 
/tmp/ccvDmFNL.o(.gnu.linkonce.t._ZN5boost10filesystem24basic_directory_iteratorINS0_10basic_pathISsNS0_11path_traitsEEEE6m_initERKS4_+0x2e): In function `boost::filesystem::basic_directory_iterator<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >::m_init(boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> const&)': 
: undefined reference to `boost::filesystem::detail::not_found_error()' 
/tmp/ccvDmFNL.o(.gnu.linkonce.t._ZN5boost10filesystem24basic_directory_iteratorINS0_10basic_pathISsNS0_11path_traitsEEEE6m_initERKS4_+0xbe): In function `boost::filesystem::basic_directory_iterator<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >::m_init(boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> const&)': 
: undefined reference to `boost::filesystem::detail::dir_itr_first(void*&, void*&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&, boost::filesystem::file_status&, boost::filesystem::file_status&)' 
/tmp/ccvDmFNL.o(.gnu.linkonce.t._ZN5boost6system10error_codeC1Ev+0x14): In function `boost::system::error_code::error_code()': 
: undefined reference to `boost::system::get_system_category()' 
/tmp/ccvDmFNL.o(.gnu.linkonce.t._ZN5boost10filesystem24basic_directory_iteratorINS0_10basic_pathISsNS0_11path_traitsEEEE9incrementEv+0xde): In function `boost::filesystem::basic_directory_iterator<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >::increment()': 
: undefined reference to `boost::filesystem::detail::dir_itr_increment(void*&, void*&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&, boost::filesystem::file_status&, boost::filesystem::file_status&)' 
/tmp/ccvDmFNL.o(.gnu.linkonce.t._ZN5boost10filesystem6statusINS0_10basic_pathISsNS0_11path_traitsEEEEENS_9enable_ifINS0_13is_basic_pathIT_EENS0_11file_statusEE4typeERKS7_+0x34): In function `boost::enable_if<boost::filesystem::is_basic_path<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >, boost::filesystem::file_status>::type boost::filesystem::status<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >(boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> const&)': 
: undefined reference to `boost::filesystem::detail::status_api(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, boost::system::error_code&)' 
/tmp/ccvDmFNL.o(.gnu.linkonce.t._ZN5boost10filesystem6detail11dir_itr_impINS0_10basic_pathISsNS0_11path_traitsEEEED1Ev+0x1d): In function `boost::filesystem::detail::dir_itr_imp<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >::~dir_itr_imp()': 
: undefined reference to `boost::filesystem::detail::dir_itr_close(void*&, void*&)' 
collect2: ld returned 1 exit status 

EDIT:

Ora ho provato:

g++ -I/home/foo/include/ test.cc -lboost_system -lboost_filesystem 

e ottenere il seguente errore:

/usr/bin/ld: cannot find -lboost_system 
collect2: ld returned 1 exit status 

ho la libboost_system-gcc34-1_38.so all'interno

/home/foo/lib 

come posso indicarlo?

Answer 1

dalla pagina man gcc:

-Ldir Add directory dir to the list of directories to be searched for -l.

Quindi, è che ti manca -L/home/foo/lib alla riga di comando?

tuo codice compilato correttamente sulla mia macchina Linux (Ubuntu 10.04, aumentare-filesystem 1,40) con il seguente comando:

g++ test.cpp -lboost_filesystem

o

g++ test.cpp -lboost_system -lboost_filesystem

Mi ha dato errori di compilazione con g++ test.cpp -lboost_system

Answer 2

Aggiungere -lboost_system (-lboost_system-mt se si sta andando ad essere threading) e -lboost_filesystem (-lboost_filesystem-mt se si sta andando ad essere threading) al cmdline, prima di qualsiasi file di input.

Answer 3

Le librerie di boost sembrano essere decorate con il suffisso gcc34-1_38. Stai usando gcc 3.4? La tua libreria boost è sul percorso della libreria? In caso contrario, potrebbe essere necessario aggiungere il percorso alle librerie di boost utilizzando il flag -L su g ++ oppure è possibile aggiungere il percorso alla variabile di ambiente LD_LIBRARY_PATH. In ogni caso, puoi collegare alle tue librerie boost usando -lboost_system-gcc34-1_38 e -lboost_filesystem-gcc34-1_38.

Answer 4

È necessario indicare al compilatore/linker dove anche le librerie, se non si trovano nella posizione predefinita. Per questo è necessario utilizzare il flag -L al compilatore:

g++ -I/home/y/include/ test.cc -L/home/foo/lib -lboost_system -lboost_filesystem