Error LNK2019: Unresolved external character "public:

Question

I am creating a torrent application using libtorrent in VS 2008. I tried the example given in the link http://www.rasterbar.com/products/libtorrent/examples.html BUt shows me this error .... how to solve them?

Linking...
main.obj : error LNK2019: unresolved external symbol "public: __thiscall libtorrent::torrent_info::~torrent_info(void)" (??1torrent_info@libtorrent@@QAE@XZ) referenced in function _main
main.obj : error LNK2019: unresolved external symbol "public: __thiscall libtorrent::torrent_info::torrent_info(struct libtorrent::lazy_entry const &)" (??0torrent_info@libtorrent@@QAE@ABUlazy_entry@1@@Z) referenced in function _main
main.obj : error LNK2019: unresolved external symbol "class std::basic_ostream > & __cdecl libtorrent::operator<<(class std::basic_ostream > &,struct libtorrent::lazy_entry const &)" (??6libtorrent@@YAAAV?$basic_ostream@DU?$char_traits@D@std@@@std@@AAV12@ABUlazy_entry@0@@Z) referenced in function _main
main.obj : error LNK2019: unresolved external symbol "int __cdecl libtorrent::lazy_bdecode(char const *,char const *,struct libtorrent::lazy_entry &,int)" (?lazy_bdecode@libtorrent@@YAHPBD0AAUlazy_entry@1@H@Z) referenced in function _main
main.obj : error LNK2019: unresolved external symbol "public: void __thiscall libtorrent::lazy_entry::clear(void)" (?clear@lazy_entry@libtorrent@@QAEXXZ) referenced in function "public: __thiscall libtorrent::lazy_entry::~lazy_entry(void)" (??1lazy_entry@libtorrent@@QAE@XZ)
main.obj : error LNK2019: unresolved external symbol "void __cdecl libtorrent::to_hex(char const *,int,char *)" (?to_hex@libtorrent@@YAXPBDHPAD@Z) referenced in function "class std::basic_ostream > & __cdecl libtorrent::operator<<(class std::basic_ostream > &,class libtorrent::big_number const &)" (??6libtorrent@@YAAAV?$basic_ostream@DU?$char_traits@D@std@@@std@@AAV12@ABVbig_number@0@@Z)
main.obj : error LNK2019: unresolved external symbol "public: struct libtorrent::peer_request __thiscall libtorrent::file_storage::map_file(int,__int64,int)const " (?map_file@file_storage@libtorrent@@QBE?AUpeer_request@2@H_JH@Z) referenced in function "public: struct libtorrent::peer_request __thiscall libtorrent::torrent_info::map_file(int,__int64,int)const " (?map_file@torrent_info@libtorrent@@QBE?AUpeer_request@2@H_JH@Z)
C:\Users\photoshop3\Documents\Visual Studio 2008\Projects\Lib2\Debug\Lib2.exe : fatal error LNK1120: 7 unresolved externals

Answer 1

.lib is not included in your project. Make sure you bind it; Configuration Properties -> Linker -> Input -> Additional Dependencies

Another alternative is to simply copy the .lib file to the folder with your project, but this does not mean that it is linked later.

.lib , . README . , .sln, , .lib , ,

Answer 2

" " → "C/++" → "" → " "?

Answer 3

public: . , , , () -.

, "libtorrent", "libtorrent".

Answer 4

, - , .

Answer 5

( ) libtorrent. , .lib . .lib :

// → : libtorrent-rasterbar.lib

README.

Answer 6

If the input libraries have 32 bits and you use them when building 64-bit, this may be one of the reasons.

Answer 7

For me, this was included in my project, but it turned out that it was a plugin that was designed so as not to create an instance in my unit test.