Compiling taglib on Qt

sruthihsr

Hi I have the following program in Qt running on Fedora 9. I am using Taglib library to extract album cover.

@TagLib::MPEG::File mpegFile(fileName,true,TagLib::AudioProperties::Average);
TagLib::ID3v2::Tag *id3v2tag = mpegFile.ID3v2Tag(true);
TagLib::ID3v2::FrameList Frame ;
TagLib::ID3v2::AttachedPictureFrame *PicFrame ;
void *RetImage = NULL, *SrcImage ;
unsigned long Size ;

                 FILE *jpegFile;
                
                 fopen &#40;"&jpegFile;.jpg","wb"&#41;;


                   if ( id3v2tag )
                   {
                     // picture frame
                     Frame = id3v2tag->frameListMap()["IdPicture"] ;

                     if (!Frame.isEmpty() )
                     {
                       // find cover art
                 for(TagLib::ID3v2::FrameList::ConstIterator it = Frame.begin(); it !=
                 Frame.end(); ++it)
                       {
                   PicFrame = (TagLib::ID3v2::AttachedPictureFrame *)(*it) ;
                         if ( PicFrame->type() ==
                 TagLib::ID3v2::AttachedPictureFrame::FrontCover)
                         {
                           // extract image (in it's compressed form)
                           Size = PicFrame->picture().size() ;
                           SrcImage = malloc ( Size ) ;
                           if ( SrcImage )
                           {
                             memcpy ( SrcImage, PicFrame->picture().data(), Size ) ;
                 fwrite(SrcImage,Size,1, jpegFile);
                 fclose(jpegFile);

                             free( SrcImage ) ;
                           }
                           if ( RetImage )
                             break ;
                         }
                       }
                     }
                   }@

I am getting the following linking errors. Can anybody tell me how do I resolve it.

error: undefined reference to TagLib::MPEG::File::File(char const*, bool, TagLib::AudioProperties::ReadStyle)' error: undefined reference to TagLib::MPEG::File::ID3v2Tag(bool)'
error: undefined reference to TagLib::ByteVector::ByteVector(char const*)' error: undefined reference to TagLib::ID3v2::Tag::frameListMap() const'
error: undefined reference to `TagLib::ByteVector::~ByteVector()'

Chuck Gao

Hi sruthihsr, your code are not easy to identify where is the functon entry, and seems miss "}" somewhere, can you make it more readable?
Do you link the lib when you use TagLib? (I think that's the most possible reason for undefined reference)
Btw, You can use "using" keywork to simplify the namesapce

sruthihsr

Thanks,
It worked for me on addition of -ltag -ltag_c to LIBS in make file