probleme avec jpeglib

bonsoir,
j'ai 2 jours que je cherche une explication pour les erreurs lors de la compilation de mon projet. J'ai essayé pas mal de solutions mais ça ne marche pas.
Voici ces erreurs

Code:

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1>Linking...
1>JPGPicture.obj : error LNK2019: unresolved external symbol "void __cdecl jpeg_destroy_decompress(struct jpeg_decompress_struct *)" (?jpeg_destroy_decompress@@YAXPAUjpeg_decompress_struct@@@Z) referenced in function "public: void __thiscall JPGPicture::readJpegFile(char *)" (?readJpegFile@JPGPicture@@QAEXPAD@Z)
1>JPGPicture.obj : error LNK2019: unresolved external symbol "unsigned char __cdecl jpeg_finish_decompress(struct jpeg_decompress_struct *)" (?jpeg_finish_decompress@@YAEPAUjpeg_decompress_struct@@@Z) referenced in function "public: void __thiscall JPGPicture::readJpegFile(char *)" (?readJpegFile@JPGPicture@@QAEXPAD@Z)
1>JPGPicture.obj : error LNK2019: unresolved external symbol "unsigned int __cdecl jpeg_read_scanlines(struct jpeg_decompress_struct *,unsigned char * *,unsigned int)" (?jpeg_read_scanlines@@YAIPAUjpeg_decompress_struct@@PAPAEI@Z) referenced in function "public: void __thiscall JPGPicture::readJpegFile(char *)" (?readJpegFile@JPGPicture@@QAEXPAD@Z)
1>JPGPicture.obj : error LNK2019: unresolved external symbol "unsigned char __cdecl jpeg_start_decompress(struct jpeg_decompress_struct *)" (?jpeg_start_decompress@@YAEPAUjpeg_decompress_struct@@@Z) referenced in function "public: void __thiscall JPGPicture::readJpegFile(char *)" (?readJpegFile@JPGPicture@@QAEXPAD@Z)
1>JPGPicture.obj : error LNK2019: unresolved external symbol "int __cdecl jpeg_read_header(struct jpeg_decompress_struct *,unsigned char)" (?jpeg_read_header@@YAHPAUjpeg_decompress_struct@@E@Z) referenced in function "public: void __thiscall JPGPicture::readJpegFile(char *)" (?readJpegFile@JPGPicture@@QAEXPAD@Z)
1>JPGPicture.obj : error LNK2019: unresolved external symbol "void __cdecl jpeg_stdio_src(struct jpeg_decompress_struct *,struct _iobuf *)" (?jpeg_stdio_src@@YAXPAUjpeg_decompress_struct@@PAU_iobuf@@@Z) referenced in function "public: void __thiscall JPGPicture::readJpegFile(char *)" (?readJpegFile@JPGPicture@@QAEXPAD@Z)
1>JPGPicture.obj : error LNK2019: unresolved external symbol "void __cdecl jpeg_CreateDecompress(struct jpeg_decompress_struct *,int,unsigned int)" (?jpeg_CreateDecompress@@YAXPAUjpeg_decompress_struct@@HI@Z) referenced in function "public: void __thiscall JPGPicture::readJpegFile(char *)" (?readJpegFile@JPGPicture@@QAEXPAD@Z)
1>JPGPicture.obj : error LNK2019: unresolved external symbol "struct jpeg_error_mgr * __cdecl jpeg_std_error(struct jpeg_error_mgr *)" (?jpeg_std_error@@YAPAUjpeg_error_mgr@@PAU1@@Z) referenced in function "public: void __thiscall JPGPicture::readJpegFile(char *)" (?readJpegFile@JPGPicture@@QAEXPAD@Z)
1>JPGPicture.obj : error LNK2019: unresolved external symbol "void __cdecl jpeg_destroy_compress(struct jpeg_compress_struct *)" (?jpeg_destroy_compress@@YAXPAUjpeg_compress_struct@@@Z) referenced in function "public: void __thiscall JPGPicture::writeJpegFile(int,char *,float *)" (?writeJpegFile@JPGPicture@@QAEXHPADPAM@Z)
1>JPGPicture.obj : error LNK2019: unresolved external symbol "void __cdecl jpeg_finish_compress(struct jpeg_compress_struct *)" (?jpeg_finish_compress@@YAXPAUjpeg_compress_struct@@@Z) referenced in function "public: void __thiscall JPGPicture::writeJpegFile(int,char *,float *)" (?writeJpegFile@JPGPicture@@QAEXHPADPAM@Z)
1>JPGPicture.obj : error LNK2019: unresolved external symbol "unsigned int __cdecl jpeg_write_scanlines(struct jpeg_compress_struct *,unsigned char * *,unsigned int)" (?jpeg_write_scanlines@@YAIPAUjpeg_compress_struct@@PAPAEI@Z) referenced in function "public: void __thiscall JPGPicture::writeJpegFile(int,char *,float *)" (?writeJpegFile@JPGPicture@@QAEXHPADPAM@Z)
1>JPGPicture.obj : error LNK2019: unresolved external symbol "void __cdecl jpeg_start_compress(struct jpeg_compress_struct *,unsigned char)" (?jpeg_start_compress@@YAXPAUjpeg_compress_struct@@E@Z) referenced in function "public: void __thiscall JPGPicture::writeJpegFile(int,char *,float *)" (?writeJpegFile@JPGPicture@@QAEXHPADPAM@Z)
1>JPGPicture.obj : error LNK2019: unresolved external symbol "void __cdecl jpeg_set_quality(struct jpeg_compress_struct *,int,unsigned char)" (?jpeg_set_quality@@YAXPAUjpeg_compress_struct@@HE@Z) referenced in function "public: void __thiscall JPGPicture::writeJpegFile(int,char *,float *)" (?writeJpegFile@JPGPicture@@QAEXHPADPAM@Z)
1>JPGPicture.obj : error LNK2019: unresolved external symbol "void __cdecl jpeg_set_defaults(struct jpeg_compress_struct *)" (?jpeg_set_defaults@@YAXPAUjpeg_compress_struct@@@Z) referenced in function "public: void __thiscall JPGPicture::writeJpegFile(int,char *,float *)" (?writeJpegFile@JPGPicture@@QAEXHPADPAM@Z)
1>JPGPicture.obj : error LNK2019: unresolved external symbol "void __cdecl jpeg_stdio_dest(struct jpeg_compress_struct *,struct _iobuf *)" (?jpeg_stdio_dest@@YAXPAUjpeg_compress_struct@@PAU_iobuf@@@Z) referenced in function "public: void __thiscall JPGPicture::writeJpegFile(int,char *,float *)" (?writeJpegFile@JPGPicture@@QAEXHPADPAM@Z)
1>JPGPicture.obj : error LNK2019: unresolved external symbol "void __cdecl jpeg_CreateCompress(struct jpeg_compress_struct *,int,unsigned int)" (?jpeg_CreateCompress@@YAXPAUjpeg_compress_struct@@HI@Z) referenced in function "public: void __thiscall JPGPicture::writeJpegFile(int,char *,float *)" (?writeJpegFile@JPGPicture@@QAEXHPADPAM@Z)

ce qui me gene c'est que ça passe bien dans un autre projet ou j'utilise la meme librairie(jpeglib).
Quelqu'un a une idée?

Bonsoir,

ce sont des erreurs de link, il manque le .lib ou .a (ou .so ?) à utiliser pendant la compilation.

Comment les utiliser lors de la compilation?

Le projet n'a pas été configuré correctement car l'éditeur de liens n'a pas trouvé la librairie. C'est du MSVC ? Il faut regarder où se situe la lib sur le disque dur et ajouter son emplacement dans la configuration de l'éditeur de liens.