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POfailed to link example program using id3 library
 

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  1. POfailed to link example program using id3 library
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    <p>i am trying to use <a href="http://id3lib.sourceforge.net/" rel="nofollow">lib id3</a> to access mp3 tags with the ultimate aim of accessing album art from mp3 music files. </p> <p>The problem is that i have even failed to compile the example programs that come with the id3 library. problem 1. trying to compile an example program in my project first generates this error</p> <pre><code>1&gt;*** NOTICE *** (not a real error) 1&gt;* You should include a define in your project which reflect how you link the library 1&gt;* If you use id3lib.lib or libprj/id3lib.dsp (you link static) you should add 1&gt;* ID3LIB_LINKOPTION=1 to your preprocessor definitions of your project. 1&gt;* If you use id3lib.dll (you link dynamic) you should add ID3LIB_LINKOPTION=3 1&gt;* to your preprocessor definitions of your project. </code></pre> <p>when i try to add </p> <pre><code>#define ID3LIB_LINKOPTION 1 </code></pre> <p>to my source file , i get many more errors.</p> <pre><code>1&gt;Linking... 1&gt;msvcprtd.lib(MSVCP90D.dll) : error LNK2005: "public: void __thiscall std::basic_ios&lt;char,struct std::char_traits&lt;char&gt; &gt;::setstate(int,bool)" (?setstate@?$basic_ios@DU?$char_traits@D@std@@@std@@QAEXH_N@Z) already defined in id3lib.lib(tag_parse.obj) 1&gt;msvcprtd.lib(MSVCP90D.dll) : error LNK2005: "public: int __thiscall std::basic_streambuf&lt;char,struct std::char_traits&lt;char&gt; &gt;::sputn(char const *,int)" (?sputn@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QAEHPBDH@Z) already defined in id3lib.lib(tag_file.obj) 1&gt;msvcprtd.lib(MSVCP90D.dll) : error LNK2005: "public: static bool __cdecl std::char_traits&lt;char&gt;::eq_int_type(int const &amp;,int const &amp;)" (?eq_int_type@?$char_traits@D@std@@SA_NABH0@Z) already defined in id3lib.lib(tag_parse.obj) 1&gt;msvcprtd.lib(MSVCP90D.dll) : error LNK2005: "public: static int __cdecl std::char_traits&lt;char&gt;::eof(void)" (?eof@?$char_traits@D@std@@SAHXZ) already defined in id3lib.lib(tag_parse.obj) </code></pre> <p>From these errors i assume that the cause of the problems is id3lib.lib in the additional dependencies. But even if i remove it from the dependencies i still get these errors</p> <pre><code>1&gt;Linking... 1&gt;main.obj : error LNK2019: unresolved external symbol "public: virtual __thiscall ID3_Tag::~ID3_Tag(void)" (??1ID3_Tag@@UAE@XZ) referenced in function _main 1&gt;main.obj : error LNK2019: unresolved external symbol "public: class ID3_Field &amp; __thiscall ID3_Frame::Field(enum ID3_FieldID)const " (?Field@ID3_Frame@@QBEAAVID3_Field@@W4ID3_FieldID@@@Z) referenced in function _main 1&gt;main.obj : error LNK2019: unresolved external symbol "public: bool __thiscall ID3_Frame::Contains(enum ID3_FieldID)const " (?Contains@ID3_Frame@@QBE_NW4ID3_FieldID@@@Z) referenced in function _main 1&gt;main.obj : error LNK2019: unresolved external symbol "public: class ID3_Frame * __thiscall ID3_Tag::Find(enum ID3_FrameID)const " (?Find@ID3_Tag@@QBEPAVID3_Frame@@W4ID3_FrameID@@@Z) referenced in function _main 1&gt;main.obj : error LNK2019: unresolved external symbol "public: __thiscall ID3_Tag::ID3_Tag(char const *)" (??0ID3_Tag@@QAE@PBD@Z) referenced in function _main 1&gt;C:\Users\GuestUser\Documents\Visual Studio 2008\Projects\idlib example\Debug\idlib example.exe : fatal error LNK1120: 5 unresolved externals </code></pre> <p>Please help me. Am beginning to feel like a c++ newbie :(</p>
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