unresolved external symbol cudnnCreate

[hscodesolution]

Hi, I am unable to build dlib example, need help to successfully build it. Here are the steps that i followed:

Building & Installing DLIB

1. Downloaded dlib from dlib.net and extracted content at d:\dlib_source
2. Generated Visual Studio Solution using cmake-gui at d:\dlib_build and opened it as administrator (It has ALL_BUILD, dlib, INSTALL, PACKAGE and ZERO_CHECK projects)
3. I build all projects which has created dlib19.24.0_release_64bit_msvc1941.lib and copied source files and lib file at C:\Program Files\dlib_project
4. C:\Program Files\dlib_project it has two sub directory include (which has dlib folder and all source codes) & lib (which has dlib19.24.0_release_64bit_msvc1941.lib file and other cmake files)

Building Example c++ program using DLIB

1. Now, created new console c++ project in visual studio 2022 > changed mode to release
2. Go to project properties > VC++ Directories
   a) Include Directories > added dlib's include path which is C:\Program Files\dlib_project\include
   b) Library Directories > added dlib's lib path which is C:\Program Files\dlib_project\lib
3. project properties > Linker > Input > Additional Dependancies > added, dlib19.24.0_release_64bit_msvc1941.lib
4. Right click project > Build Dependancies > Build Customisation > tick CUDA 12.6
5. copied code from dlib's example program dnn_face_recognition_ex.cpp and pasted it to console project
6. Building project failed with error, LNK2001 unresolved external symbol cudnnCreate .......dlib19.24.0_release_64bit_msvc1941.lib(cudnn_dlibapi.obj)

It seems like something wrong with linking.. need help on this..

[hscodesolution]

Problem get solved by adding cuda library directory to project like in above step 2 (b) i have to include directory, C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v12.6\lib\x64 (this is the directory where you can find cusolver.lib)

So, if anybody facing the same issue than do this to fix the problem and also note that after compile to run exe you need to copy dll file from cuda bin folder (in my case its, C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v12.6\bin )