OpenCV不会使用CUDA构建，即使在CMake中WITH_CUDA = ON [英] OpenCV won't build with CUDA even though WITH_CUDA=ON in CMake
问题描述
我已经尝试建立OpenCV 3.1使用CMake（gui版本）启用Cuda。我已经安装Cuda版本7.5 64位和CMake自动找到正确的路径Cuda工具包。我确保WITH_CUDA值设置为ON，并按下配置。这是我对Cuda的看法：
检测到CUDA：7.5
CUDA NVCC目标标志：-gencode; compute_20，code = sm_20; -gencode; arch = compute_20，code = sm_21; -gencode; arch = compute_30，code = sm_30; -gencode; arch = compute_35，code = sm_35; -gencode; arch = compute_30，code = compute_30
...
额外的依赖关系：comctl32 gdi32 ole32 setupapi ws2_32 vfw32 cudart nppc nppi npps cufft -LC：/ Program Files / NVIDIA GPU计算工具包/ CUDA / v7.5 / lib / x64
...
其他第三方库：
使用IPP：9.0.1 [9.0.1]
at：C ：/OpenCV-3.1.0/opencv/sources/3rdparty/ippicv/unpack/ippicv_win
使用IPP异步：NO
使用特征：NO
使用Cuda：YES（ver 7.5）
使用OpenCL：YES
使用自定义HAL：NO
NVIDIA CUDA
使用CUFFT：YES
使用CUBLAS：NO
使用NVCUVID：NO
NVIDIA GPU arch：20 21 30 35
NVIDIA PTX archs：30
使用快速数学：YES
然后我使用Visual Studio 12 2013 Win64生成。
接下来我在Visual Studio 2013中打开新生成的OpenCV.sln项目并构建项目。它完成没有任何错误，但103警告，像这样：
LINK：warning LNK4044：unrecognized option'/ LC： / NVIDIA GPU计算工具包/ CUDA / v7.5 / lib / x64';忽略
OpenCV构建正常，我可以使用它来构建程序。我也可以包括opencv2 / core / cuda.hpp没有任何问题。但是，当我尝试使用cuda :: getDevice（）我得到这个错误：
OpenCV错误：没有CUDA支持库在没有CUDA支持的情况下编译）在throw_no_cuda中，文件C：\builds\master_PackSlave-win64-vc12-shared\opencv\modules\core\include\opencv2 / core / private.cuda.hpp，line 97
当我从cv :: getBuildInformation（）打印信息时：get：
其他第三方库：
使用IPP：9.0.1 [9.0.1]
at：C：\ builds\master_PackSlave-win64-vc12-shared\opencv\3rdparty / ippicv / unpack / ippicv_win
使用IPP异步：NO
使用Eigen：NO
使用Cuda：NO
使用OpenCL：YES
使用自定义HAL：NO
似乎Cuda被禁用过程，但我不能弄清楚为什么。我已经尝试重新配置和重建几次具有相同的结果。
问题是CMake：它为Visual Studio生成错误的链接选项。
$ c$ b
LINK：warning LNK4044：unrecognized option'/ LC：/ Program Files / NVIDIA GPU Computing Toolkit / CUDA / v7.5 / lib / ;忽略
它应该是LIBPATH：C：而不是LC：
要解决此问题：
- 使用CMake生成解决方案
- 转到构建目录
- 打开IDE /文本编辑器，可以在此目录中进行全局搜索
- 在任何文件中出现-LC：，将其替换为-LIBPATH：C：。
======= EDIT =========
我发现问题，它是在CMakeLists.txt：
foreach（p $ {CUDA_LIBS_PATH}）
set（OPENCV_LINKER_LIBS $ {OPENCV_LINKER_LIBS} -L $ {p}）
endforeach（）
而不是使用$ {CMAKE_LIBRARY_PATH_FLAG}
- 打开CMakeLists.txt
- 将-L替换为$ {CMAKE_LIBRARY_PATH_FLAG}
配置&用CMake生成解决方案并用VS编译。
希望它会帮助！
I have tried to build OpenCV 3.1 using CMake (the gui version) to enable Cuda. I have installed Cuda version 7.5 64-bit and CMake automatically found the correct path to the Cuda toolkit. I made sure that the WITH_CUDA value was set to ON, and pressed configure. This is what I got concerning Cuda:
CUDA detected: 7.5
CUDA NVCC target flags: -gencode;arch=compute_20,code=sm_20;-gencode;arch=compute_20,code=sm_21;-gencode;arch=compute_30,code=sm_30;-gencode;arch=compute_35,code=sm_35;-gencode;arch=compute_30,code=compute_30
...
Extra dependencies: comctl32 gdi32 ole32 setupapi ws2_32 vfw32 cudart nppc nppi npps cufft -LC:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v7.5/lib/x64
...
Other third-party libraries:
Use IPP: 9.0.1 [9.0.1]
at: C:/OpenCV-3.1.0/opencv/sources/3rdparty/ippicv/unpack/ippicv_win
Use IPP Async: NO
Use Eigen: NO
Use Cuda: YES (ver 7.5)
Use OpenCL: YES
Use custom HAL: NO
NVIDIA CUDA
Use CUFFT: YES
Use CUBLAS: NO
USE NVCUVID: NO
NVIDIA GPU arch: 20 21 30 35
NVIDIA PTX archs: 30
Use fast math: YES
Then I generate using Visual Studio 12 2013 Win64.
Next I open the newly generated OpenCV.sln project in Visual Studio 2013 and build the project. It completes without any errors, but 103 warnings like this:
LINK : warning LNK4044: unrecognized option '/LC:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v7.5/lib/x64'; ignored
OpenCV builds just fine and I can build programs with it. I can also include "opencv2/core/cuda.hpp" without any problem. However, when I try to use cuda::getDevice() i get this error:
OpenCV Error: No CUDA support (The library is compiled without CUDA support) in throw_no_cuda, file C:\builds\master_PackSlave-win64-vc12-shared\opencv\modules\core\include\opencv2/core/private.cuda.hpp, line 97
When I print the information from cv::getBuildInformation() i get:
Other third-party libraries:
Use IPP: 9.0.1 [9.0.1]
at: C:\builds\master_PackSlave-win64-vc12-shared\opencv\3rdparty/ippicv/unpack/ippicv_win
Use IPP Async: NO
Use Eigen: NO
Use Cuda: NO
Use OpenCL: YES
Use custom HAL: NO
It seems Cuda is disabled somewhere in the process, but I can't figure out why. I have tried to reconfigure and rebuild several times with the same results. Would love some help on this!
The problem is CMake: it generates wrong link options for Visual Studio.
LINK : warning LNK4044: unrecognized option '/LC:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v7.5/lib/x64'; ignored
It should be "LIBPATH:C:" instead of "LC:".
To fix the problem:
- Generate the solution with CMake
- Go to the build directory
- Open an IDE/Text editor which is able to do a global search in this directory
- For each occurrence of "-LC:" in any file, replace it by "-LIBPATH:C:".
========= EDIT =========
I found the problem, it is in CMakeLists.txt :
foreach(p ${CUDA_LIBS_PATH})
set(OPENCV_LINKER_LIBS ${OPENCV_LINKER_LIBS} -L${p})
endforeach()
Instead of using "${CMAKE_LIBRARY_PATH_FLAG}" which automatically put -LIBPATH, someone put "-L"...
So to fix it:
- Open CMakeLists.txt
- Replace "-L" by "${CMAKE_LIBRARY_PATH_FLAG}"
Configure & Generate the solution with CMake and compile with VS.
Hope it will help!
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