# Opencv build did not generate opencv\_world dll and only generates opencv\_videoio\_ffmpeg490\_64 (OpenCV with CUDA)) **URL:** \ **Category:** C++\ **Tags:** windows, build, cmake, cuda\ **Created:** [February 8, 2024, 3:04am UTC](https://forum.opencv.org/t/opencv-build-did-not-generate-opencv-world-dll-and-only-generates-opencv-videoio-ffmpeg490-64-opencv-with-cuda/16397 "2024-02-08T03:04:37Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![fropatapon](https://avatars.discourse-cdn.com/v4/letter/f/aca169/32.png) [@fropatapon](https://forum.opencv.org/u/fropatapon)\ **Post date:** [February 8, 2024, 3:04am UTC](https://forum.opencv.org/t/opencv-build-did-not-generate-opencv-world-dll-and-only-generates-opencv-videoio-ffmpeg490-64-opencv-with-cuda/16397/1 "2024-02-08T03:04:37Z")
Hello! Its my first time trying to build opencv library and im experimenting the same error in > [@Opencv build did not generate opencv\_world dll](https://forum.opencv.org/t/opencv-build-did-not-generate-opencv-world-dll/10423): > > I have build opencv for windows machine using VS2019. I have checked the opencv\_world flag still it has not generated any dlls. First I located ALLBUILD → Mouse + Right Click build Then INSTALL → Mouse + Right Click Install \*\* I didnt copy the complete log because of the character limit. Here is the log file, 1\>-- Installing: E:/opencv/opencv-4.6.0/release/install/include/opencv2/highgui.hpp 1\>-- Installing: E:/opencv/opencv-4.6.0/release/install/include/opencv2/highgui/highgui.hpp 1\>-- Ins… Basically when i do the building process, the opencv\_worldXXX.dll isnt generated and I get an error when thying to built a program with Visual Studio. The steps that i have done are the following (same of the following video: [https://www.youtube.com/watch?v=-GY2gT2umpk&t=296s](https://www.youtube.com/watch?v=-GY2gT2umpk&t=296s)) 1. Download opencv latest release, opencv contrib, create a build folder and put them in same directory. 2. Run CMake gui: i) Configure selecting VS code 2019 with x64 ii) Configure checking these boxes: WITH\_CUDA; OPENCV\_DNN\_CUDA; ENABLE\_FAST\_MATH; BUILD\_opencv\_world; Add the modules of contrib file to OPENCV\_EXTRA\_MODULES\_PATH iii) Configure checking CUDA\_FAST\_MATH, changing the values of CUDA\_ARCH\_BIN to 7.5 (due i have a geforce 1650), and only configurating to Release the CMAKE\_CONFIGURATION\_TYPES. iv) Generate 3. Run cmake --build “{Path}\build” --target INSTALL --config Release When it ends, it creates {path}\build\install\x64\vc16\bin directory that only contains this file opencv\_videoio\_ffmpeg490\_64.dll . Why isnt the opencv\_world.dll generating, if i have checked the BUILD\_opencv\_world box? In the cmake GUI terminal also tells some things are missing, but I dont know if they are the source of my error: - Could NOT find OpenJPEG (minimal suitable version: 2.0, recommended version \>= 2.3.1). OpenJPEG will be built from sources OpenJPEG: VERSION = 2.5.0, BUILD = opencv-4.9.0-openjp2-2.5.0 OpenJPEG libraries will be built from sources: libopenjp2 (version “2.5.0”) -NVCUVID: Header not found, WITH\_NVCUVID requires Nvidia decoding library header C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v12.3;C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v12.3/include/nvcuvid.h -NVCUVENC: Header not found, WITH\_NVCUVENC requires Nvidia encoding library header C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v12.3;C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v12.3/include/nvEncodeAPI.h -Could not find OpenBLAS include. Turning OpenBLAS\_FOUND off -Could not find OpenBLAS lib. Turning OpenBLAS\_FOUND off -Could NOT find BLAS (missing: BLAS\_LIBRARIES) -Could NOT find LAPACK (missing: LAPACK\_LIBRARIES) Reason given by package: LAPACK could not be found because dependency BLAS could not be found. -VTK is not found. Please set -DVTK\_DIR in CMake to VTK build directory, or to VTK install subdirectory with VTKConfig.cmake file Module opencv\_alphamat disabled because the following dependencies are not found: Eigen freetype2: NO harfbuzz: NO -Julia not found. Not compiling Julia Bindings. -Module opencv\_ovis disabled because OGRE3D was not found -No preference for use of exported gflags CMake configuration set, and no hints for include/library directories provided. Defaulting to preferring an installed/exported gflags CMake configuration if available. -Failed to find installed gflags CMake configuration, searching for gflags build directories exported with CMake. -Failed to find gflags - Failed to find an installed/exported CMake configuration for gflags, will perform search for installed gflags components. -Failed to find gflags - Could not find gflags include directory, set GFLAGS\_INCLUDE\_DIR to directory containing gflags/gflags.h -Failed to find glog - Could not find glog include directory, set GLOG\_INCLUDE\_DIR to directory containing glog/logging.h Module opencv\_sfm disabled because the following dependencies are not found: Eigen Glog/Gflags Tesseract: NO Processing WORLD modules… module opencv\_cudev… module opencv\_core… Allocator metrics storage type: ‘long long’ Excluding from source files list: /modules/world/test/test\_intrin256.lasx.cpp module opencv\_cudaarithm… module opencv\_flann… module opencv\_imgproc… module opencv\_intensity\_transform… module opencv\_ml… module opencv\_phase\_unwrapping… module opencv\_plot… module opencv\_quality… module opencv\_reg… module opencv\_signal… module opencv\_surface\_matching… module opencv\_cudafilters… module opencv\_cudaimgproc… module opencv\_cudawarping… module opencv\_dnn… ---
**Author:** ![cudawarped](https://avatars.discourse-cdn.com/v4/letter/c/9dc877/32.png) [@cudawarped](https://forum.opencv.org/u/cudawarped)\ **Post date:** [February 8, 2024, 5:37am UTC](https://forum.opencv.org/t/opencv-build-did-not-generate-opencv-world-dll-and-only-generates-opencv-videoio-ffmpeg490-64-opencv-with-cuda/16397/2 "2024-02-08T05:37:42Z")
What is the error you get when building and what is the full CMake configuration output underneath ```auto -- -- General configuration for OpenCV ``` ---
**Author:** ![fropatapon](https://avatars.discourse-cdn.com/v4/letter/f/aca169/32.png) [@fropatapon](https://forum.opencv.org/u/fropatapon)\ **Post date:** [February 8, 2024, 6:36pm UTC](https://forum.opencv.org/t/opencv-build-did-not-generate-opencv-world-dll-and-only-generates-opencv-videoio-ffmpeg490-64-opencv-with-cuda/16397/3 "2024-02-08T18:36:16Z")
This are the errors that appears when I try to build for opencv: ![image](https://us1.discourse-cdn.com/flex020/uploads/opencv/original/2X/9/944c4d0c45625544acb928f02c1f8a2f1530d3c0.png) General configuration for OpenCV 4.9.0 ===================================== Version control: unknown Extra modules: Location (extra): D:/OpenCV\_con\_CUDA\_full\_RyD/opencv\_contrib-4.x/modules Version control (extra): unknown Platform: Timestamp: 2024-02-08T15:15:52Z Host: Windows 10.0.19045 AMD64 CMake: 3.28.2 CMake generator: Visual Studio 17 2022 CMake build tool: C:/Program Files/Microsoft Visual Studio/2022/Community/MSBuild/Current/Bin/amd64/MSBuild.exe MSVC: 1938 Configuration: Debug Release CPU/HW features: Baseline: SSE SSE2 SSE3 requested: SSE3 Dispatched code generation: SSE4\_1 SSE4\_2 FP16 AVX AVX2 AVX512\_SKX requested: SSE4\_1 SSE4\_2 AVX FP16 AVX2 AVX512\_SKX SSE4\_1 (18 files): + SSSE3 SSE4\_1 SSE4\_2 (2 files): + SSSE3 SSE4\_1 POPCNT SSE4\_2 FP16 (1 files): + SSSE3 SSE4\_1 POPCNT SSE4\_2 FP16 AVX AVX (9 files): + SSSE3 SSE4\_1 POPCNT SSE4\_2 AVX AVX2 (38 files): + SSSE3 SSE4\_1 POPCNT SSE4\_2 FP16 FMA3 AVX AVX2 AVX512\_SKX (8 files): + SSSE3 SSE4\_1 POPCNT SSE4\_2 FP16 FMA3 AVX AVX2 AVX\_512F AVX512\_COMMON AVX512\_SKX C/C++: Built as dynamic libs?: YES C++ standard: 11 C++ Compiler: C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.38.33130/bin/Hostx64/x64/cl.exe (ver 19.38.33135.0) C++ flags (Release): /DWIN32 /D\_WINDOWS /W4 /GR /D \_CRT\_SECURE\_NO\_DEPRECATE /D \_CRT\_NONSTDC\_NO\_DEPRECATE /D \_SCL\_SECURE\_NO\_WARNINGS /Gy /bigobj /Oi /fp:fast /EHa /wd4127 /wd4251 /wd4324 /wd4275 /wd4512 /wd4589 /wd4819 /MP /O2 /Ob2 /DNDEBUG C++ flags (Debug): /DWIN32 /D\_WINDOWS /W4 /GR /D \_CRT\_SECURE\_NO\_DEPRECATE /D \_CRT\_NONSTDC\_NO\_DEPRECATE /D \_SCL\_SECURE\_NO\_WARNINGS /Gy /bigobj /Oi /fp:fast /EHa /wd4127 /wd4251 /wd4324 /wd4275 /wd4512 /wd4589 /wd4819 /MP /Zi /Ob0 /Od /RTC1 C Compiler: C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.38.33130/bin/Hostx64/x64/cl.exe C flags (Release): /DWIN32 /D\_WINDOWS /W3 /D \_CRT\_SECURE\_NO\_DEPRECATE /D \_CRT\_NONSTDC\_NO\_DEPRECATE /D \_SCL\_SECURE\_NO\_WARNINGS /Gy /bigobj /Oi /fp:fast /MP /O2 /Ob2 /DNDEBUG C flags (Debug): /DWIN32 /D\_WINDOWS /W3 /D \_CRT\_SECURE\_NO\_DEPRECATE /D \_CRT\_NONSTDC\_NO\_DEPRECATE /D \_SCL\_SECURE\_NO\_WARNINGS /Gy /bigobj /Oi /fp:fast /MP /Zi /Ob0 /Od /RTC1 Linker flags (Release): /machine:x64 /INCREMENTAL:NO Linker flags (Debug): /machine:x64 /debug /INCREMENTAL ccache: NO Precompiled headers: NO Extra dependencies: cudart\_static.lib nppc.lib nppial.lib nppicc.lib nppidei.lib nppif.lib nppig.lib nppim.lib nppist.lib nppisu.lib nppitc.lib npps.lib cublas.lib cudnn.lib cufft.lib -LIBPATH:C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v12.3/lib/x64 3rdparty dependencies: OpenCV modules: To be built: aruco bgsegm bioinspired calib3d ccalib core cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev datasets dnn dnn\_objdetect dnn\_superres dpm face features2d flann fuzzy gapi hfs highgui img\_hash imgcodecs imgproc intensity\_transform line\_descriptor mcc ml objdetect optflow phase\_unwrapping photo plot quality rapid reg rgbd saliency shape signal stereo stitching structured\_light superres surface\_matching text tracking ts video videoio videostab wechat\_qrcode world xfeatures2d ximgproc xobjdetect xphoto Disabled: - Disabled by dependency: - Unavailable: alphamat cannops cvv freetype hdf java julia matlab ovis python2 python3 sfm viz Applications: tests perf\_tests apps Documentation: NO Non-free algorithms: NO Windows RT support: NO GUI: Win32 UI: YES VTK support: NO Media I/O: ZLib: build (ver 1.3) JPEG: build-libjpeg-turbo (ver 2.1.3-62) SIMD Support Request: YES SIMD Support: NO WEBP: build (ver encoder: 0x020f) PNG: build (ver 1.6.37) TIFF: build (ver 42 - 4.2.0) JPEG 2000: build (ver 2.5.0) OpenEXR: build (ver 2.3.0) HDR: YES SUNRASTER: YES PXM: YES PFM: YES Video I/O: DC1394: NO FFMPEG: YES (prebuilt binaries) avcodec: YES (58.134.100) avformat: YES (58.76.100) avutil: YES (56.70.100) swscale: YES (5.9.100) avresample: YES (4.0.0) GStreamer: NO DirectShow: YES Media Foundation: YES DXVA: YES Parallel framework: Concurrency Trace: YES (with Intel ITT) Other third-party libraries: Intel IPP: 2021.11.0 [2021.11.0] at: D:/OpenCV\_con\_CUDA\_full\_RyD/build/3rdparty/ippicv/ippicv\_win/icv Intel IPP IW: sources (2021.11.0) at: D:/OpenCV\_con\_CUDA\_full\_RyD/build/3rdparty/ippicv/ippicv\_win/iw Lapack: NO Eigen: NO Custom HAL: NO Protobuf: build (3.19.1) Flatbuffers: builtin/3rdparty (23.5.9) NVIDIA CUDA: YES (ver 12.3, CUFFT CUBLAS FAST\_MATH) NVIDIA GPU arch: 75 NVIDIA PTX archs: 75 cuDNN: YES (ver 9.0.0) OpenCL: YES (NVD3D11) Include path: D:/OpenCV\_con\_CUDA\_full\_RyD/opencv-4.9.0/3rdparty/include/opencl/1.2 Link libraries: Dynamic load Python (for build): C:/Users/FranciscoAguilera/AppData/Local/Microsoft/WindowsApps/python3.exe Java: ant: NO Java: YES (ver 1.8.0.341) JNI: C:/Program Files/Java/jdk1.8.0\_341/include C:/Program Files/Java/jdk1.8.0\_341/include/win32 C:/Program Files/Java/jdk1.8.0\_341/include Java wrappers: NO Java tests: NO Install to: D:/OpenCV\_con\_CUDA\_full\_RyD/build/install ---
**Author:** ![cudawarped](https://avatars.discourse-cdn.com/v4/letter/c/9dc877/32.png) [@cudawarped](https://forum.opencv.org/u/cudawarped)\ **Post date:** [February 8, 2024, 7:21pm UTC](https://forum.opencv.org/t/opencv-build-did-not-generate-opencv-world-dll-and-only-generates-opencv-videoio-ffmpeg490-64-opencv-with-cuda/16397/4 "2024-02-08T19:21:24Z")
The errors from the output window. I want to see the first error which is generated along with the associated text please. ---
**Author:** ![fropatapon](https://avatars.discourse-cdn.com/v4/letter/f/aca169/32.png) [@fropatapon](https://forum.opencv.org/u/fropatapon)\ **Post date:** [February 8, 2024, 8:53pm UTC](https://forum.opencv.org/t/opencv-build-did-not-generate-opencv-world-dll-and-only-generates-opencv-videoio-ffmpeg490-64-opencv-with-cuda/16397/5 "2024-02-08T20:53:11Z")
If i built using the following command: cmake --build “{Path}\build” --target INSTALL --config Release No error windows pop up, but in the cmd a red warning appears (translated): error C3861: ‘cudnnSetRNNDescriptor\_v6’: identifier not found [C:\Users\FranciscoAguilera\Documents\Op enCV\_CUDA\_Full\build\modules\world\opencv\_world.vcxproj] Also, there is no “/install” directory created, so i cant add the bin folder to the path: ![image](https://us1.discourse-cdn.com/flex020/uploads/opencv/original/2X/7/769e4de5996371df5d82d6d350902511f1b8b79a.png) I dont understand what I have done. Now Im running another compile using Visual Studio 2022, Built ALL\_BUILD and then INSTALL. Once is done, i can show you what i get ---
**Author:** ![fropatapon](https://avatars.discourse-cdn.com/v4/letter/f/aca169/32.png) [@fropatapon](https://forum.opencv.org/u/fropatapon)\ **Post date:** [February 8, 2024, 11:02pm UTC](https://forum.opencv.org/t/opencv-build-did-not-generate-opencv-world-dll-and-only-generates-opencv-videoio-ffmpeg490-64-opencv-with-cuda/16397/6 "2024-02-08T23:02:26Z")
I built with VS and the same error messages appears that I show at the start of the post. Building with Visual studio creates de /install folder and I get the bin and lib folder, so I add them to the Path in env. variables. Now, if i try to build and run this code: CMake: ```auto cmake_minimum_required(VERSION 3.0.0) project(test_opencv VERSION 0.1.0) include(CTest) enable_testing() find_package( OpenCV REQUIRED) include_directories( ${OpenCV_INCLUDE_DIRS} ) add_executable(test_opencv main.cpp) target_link_libraries( test_opencv ${OpenCV_LIBS}) set(CPACK_PROJECT_NAME ${PROJECT_NAME}) set(CPACK_PROJECT_VERSION ${PROJECT_VERSION}) include(CPack) ``` main.cpp: ```auto #include #include #include #include #include #include using namespace std; using namespace cv; using namespace dnn; using namespace cuda; int main(int, char**) { printCudaDeviceInfo(0); cout << "Hello, world!\n"; } ``` The following errors shows up: ![image](https://us1.discourse-cdn.com/flex020/uploads/opencv/original/2X/5/50f2be867a33763ad4ef85a82ce8e1d9c89de088.png) ---
**Author:** ![cudawarped](https://avatars.discourse-cdn.com/v4/letter/c/9dc877/32.png) [@cudawarped](https://forum.opencv.org/u/cudawarped)\ **Post date:** [February 9, 2024, 5:53am UTC](https://forum.opencv.org/t/opencv-build-did-not-generate-opencv-world-dll-and-only-generates-opencv-videoio-ffmpeg490-64-opencv-with-cuda/16397/7 "2024-02-09T05:53:53Z")
It look like OpenCV doesn’t support cuDNN 9.0. I suggest using 8.9.7 instead which I don’t doesn’t generate the above error on my system. > **[cuDNN Archive](https://developer.nvidia.com/rdp/cudnn-archive)** > > Download releases from the GPU-accelerated primitive library for deep neural networks. ---
**Author:** ![fropatapon](https://avatars.discourse-cdn.com/v4/letter/f/aca169/32.png) [@fropatapon](https://forum.opencv.org/u/fropatapon)\ **Post date:** [February 9, 2024, 2:44pm UTC](https://forum.opencv.org/t/opencv-build-did-not-generate-opencv-world-dll-and-only-generates-opencv-videoio-ffmpeg490-64-opencv-with-cuda/16397/8 "2024-02-09T14:44:18Z")
Thank you, I changed cudnn version, restart PC and it worked!!! After a week trying to install opencv with cuda im so happy to finally work. Really apreciate your help