Cmake cannot find cuda

CUDA Toolkit Develop, Optimize and Deploy GPU-Accelerated Apps The NVIDIA® CUDA® Toolkit provides a development environment for creating high performance GPU-accelerated applications. With the CUDA Toolkit, you can develop, optimize, and deploy your applications on GPU-accelerated embedded systems, desktop workstations, enterprise data centers, cloud-based platforms and HPC supercomputers.

Dec 14, 2019 · Sometimes the mention CUDA version in the system information is not the exact version. So at that kind of situation change the CUDA version and try the process again. Hope you got something from this.
pthbrk. 1 year ago. Since CUDNN depends on CUDA, OpenCV has to be told how to find CUDA first. There's no need to copy any files. My guess is that cuda will be installed either under subdirs of /usr/ or /usr/local/cuda (run which nvcc to get full path). Then in CMake cmd-line, add CUDA_TOOLKIT_ROOT_DIR variable: -DCUDA_TOOLKIT_ROOT_DIR=/usr ...
The cmake build process can’t find the relevant CUDA files. I have tried to follow the directions of the newest cmake “find CUDA” page, but I cannot find any combination of environment variables that enables cmake to find CUDA. Put another way - there are header files here: /opt/nvidia/hpc_sdk/Linux_x86_64/cuda/10.2/include and here:
@robert.maynard are you saying that CMake won't be able to find the nvcc compiler if it sits in a default location but it's not in the PATH?. I don't think this is satisfactory. The CUDA Toolkit is not often part of the OS, so it's binaries may well not be in the PATH.. I suppose there is nothing like a free lunch: with the old method it is more difficult to create targets for CUDA ...
Adjust CMAKE_MODULE_PATH to find FindOpenCV.cmake or set OpenCV_DIR to the directory containing a CMake configuration file for OpenCV. The file will have one of the following names: OpenCVConfig.cmake opencv-config.cmake
To set CUDA_TOOLKIT_ROOT_DIR in CMake on windows, open up cmake-gui, run "configure" once then go to "advanced:" Scroll down until you see CUDA_TOOLKIT_ROOT_DIR : And set it to your CUDA toolkit directory (which is probably C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v8.0 if you're using CUDA version 8.0)
cmake mentioned CUDA_TOOLKIT_ROOT_DIR as cmake variable, not environment one. That's why it does not work when you put it into .bashrc. If you look into FindCUDA.cmake it clearly says that: The script will prompt the user to specify CUDA_TOOLKIT_ROOT_DIR if the prefix cannot be determined by the location of nvcc in the system path and REQUIRED is specified to find_package().
Nov 26, 2019 · @Drechsler can you check that in the board that you have the issue you are actually using release 1.12.0, lanelet2 and the mrt_cmake_modules have been introduced in 1.13.0 sgermanserrano ( 2019-11-27 05:13:55 -0500 ) edit
A CUDA toolkit (>= v7.0) is still required but it is used only for GPU device code generation and to link against the CUDA runtime library. The clang CUDA support simplifies compilation and provides benefits for development (e.g. allows the use code sanitizers in CUDA host-code).
This variable contains the paths that nvcc implicitly uses to find libraries. find_library(CUDA_LIB <lib-name> PATHS ${CMAKE_CUDA_IMPLICIT_LINK_DIRECTORIES}) Conclusion. With CMake 3.8, we have a new way to use CUDA in our CMake projects. It could be a bit difficult to get started because CUDA-related changes are not documented in a single place.
@robert.maynard are you saying that CMake won't be able to find the nvcc compiler if it sits in a default location but it's not in the PATH?. I don't think this is satisfactory. The CUDA Toolkit is not often part of the OS, so it's binaries may well not be in the PATH.. I suppose there is nothing like a free lunch: with the old method it is more difficult to create targets for CUDA ...
<I want to build opencv 4.4 with cuda on ubuntu 18.04, while, when I cmake, it shows that: "CMake Warning at cmake/OpenCVFindLibsPerf.cmake:45 (message): OpenCV is not able to find/configure CUDA SDK (required by WITH_CUDA). CUDA support will be disabled in OpenCV build. To eliminate this warning remove WITH_CUDA=ON CMake configuration option.