错误显示一个三个库没找到

1、<linux/videodev.h> not found

fatal error: linux/videodev.h: 没有那个文件或目录
#include <linux/videodev.h>
^~~~~~~~~~~~~~~~~~
compilation terminated.

解决方法：

安装libv4l-dev库

sudo apt-get install libv4l-dev

建立软映射连接

sudo ln -s /usr/include/libv4l1-videodev.h /usr/include/linux/videodev.h

2、<sys/videoio.h> not found

fatal error: sys/videoio.h: 没有那个文件或目录
#include <sys/videoio.h>
^~~~~~~~~~~~~~~
compilation terminated.

这个不用管，不影响使用，参考：

sys/videoio.h not found_zhe_csdn的博客-CSDN博客

编程遇到问题与解决（opencv 、sys / videoio.h 、eigen）_flygqin的博客-CSDN博客

OpenCV-3编译安装方法及常见错误解决（Ubuntu平台）_AskuaSen-CSDN博客

解决方法：

让系统找到videoio.h即可

sudo mkdir /usr/include/sys/   #新建文件夹
sudo cp /usr/local/include/opencv2/videoio/videoio_c.h /usr/include/sys/
sudo ln -s /usr/include/sys/videoio_c.h /usr/include/sys/videoio.h

2.5、 <sys/sysctl.h> not found

错误提示：opencv-2.4.13/modules/core/src/parallel.cpp:60:18: fatal error: sys/sysctl.h: No such file or directory
#include <sys/sysctl.h>
^~~~~~~~~~~~~~
compilation terminated.
make[2]: *** [modules/core/CMakeFiles/opencv_core.dir/build.make:370: modules/core/CMakeFiles/opencv_core.dir/src/parallel.cpp.o] Error 1

错误原因：新版本Linux 系统删除了sys/sysctl.h。

解决方法：

注释掉文件opencv-2.4.13/modules/core/src/parallel.cpp中的 #include <sys/sysctl.h>

注视掉文件opencv-2.4.13/modules/core/src/system.cpp中的 #include <sys/sysctl.h>

3、<ffmpeg/avformat.h> not found

fatal error: ffmpeg/avformat.h: 没有那个文件或目录
#include <ffmpeg/avformat.h>
^~~~~~~~~~~~~~~~~~~
compilation terminated.

这个错误是因为缺乏ffmpeg的库

解决方法：

安装ffmpeg

sudo apt install ffmpeg

建立文件夹，和软连接

sudo mkdir /usr/include/ffmpeg
sudo ln -s /usr/include/x86_64-linux-gnu/libavformat/avformat.h /usr/include/ffmpeg/avformat.h
sudo ln -s /usr/include/x86_64-linux-gnu/libavformat/avio.h /usr/include/ffmpeg/avio.h

4、CUDA问题

CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
opencv_dep_CUDA_nppi_LIBRARY
linked by target "opencv_test_core" in directory /home/ubuntu/Mydata/opencv-2.4.11/modules/core
linked by target "opencv_test_core" in directory /home/ubuntu/Mydata/opencv-2.4.11/modules/core
linked by target "opencv_core" in directory /home/ubuntu/Mydata/opencv-2.4.11/modules/core
linked by target "opencv_core" in directory /home/ubuntu/Mydata/opencv-2.4.11/modules/core
linked by target "opencv_perf_core" in directory /home/ubuntu/Mydata/opencv-2.4.11/modules/core

.......

解决方法： Window CMAKE 编译opencv3.4.1(CUDA9.1)遇到错误 linked by target "opencv_cudev" in directory_cvml的博客-CSDN博客

5、Ubuntu 18.4不支持opencv-2.4.11自带的OpenCVDetectCXXCompiler.cmake

CMake Error at cmake/OpenCVDetectCXXCompiler.cmake:85 (list):
list GET given empty list
Call Stack (most recent call first):
CMakeLists.txt:89 (include)

CMake Error at cmake/OpenCVDetectCXXCompiler.cmake:86 (list):
list GET given empty list
Call Stack (most recent call first):
CMakeLists.txt:89 (include)

CMake Error at cmake/OpenCVDetectCXXCompiler.cmake:89 (math):
math cannot parse the expression: "*100 + ": syntax error, unexpected
exp_TIMES, expecting exp_PLUS or exp_MINUS or exp_OPENPARENT or exp_NUMBER
(1)
Call Stack (most recent call first):
CMakeLists.txt:89 (include)

解决方法：

CMake Error at cmake/OpenCVDetectCXXCompiler.cmake:85 (list)_u010003609的博客-CSDN博客

6、make出错

/usr/include/c++/7/cstdlib:75:15: fatal error: stdlib.h: 没有那个文件或目录
#include_next <stdlib.h>
^~~~~~~~~~
compilation terminated.

cmake时加上参数-D ENABLE_PRECOMPILED_HEADERS=OFF

7、NVCC出错

nvcc fatal   : Unsupported gpu architecture 'compute_20'
CMake Error at cuda_compile_generated_matrix_operations.cu.o.cmake:208 (message):
Error generating
/home/ubuntu/Mydata/opencv-2.4.11/build/modules/core/CMakeFiles/cuda_compile.dir/__/dynamicuda/src/cuda/./cuda_compile_generated_matrix_operations.cu.o

解决方法：

cmake时加上参数-D CUDA_GENERATION=Kepler

CMake Files/ opencv _example . dir/example . cpp . o：在函数‘main’中： example . cpp:( . text+0x1 2 c)：对‘cv::imshow(cv::String const&, cv::_InputArray const&)’未定义的引用 example . cpp:( . text+0x 2 1d)：对‘cv::imshow(cv::String ubuntu kylin 1 4 . 04 opencv 2 . 4 . 11 由于某些软件包对 opencv 2 . 4 的支持暂不更新到 opencv 3二、下载 opencv 在 opencv 官网下载源代码：https://github . com/Itseez/ opencv /archive/ 2 . 4 . 11 . zip 然后解压得到 opencv - 2 . 4 . 11 文件夹，我把它放在主文件夹～/下面三、 安装 openc 打开终端， 安装 以下软件包 sudo apt install build-essential sudo apt install cmake git libgtk 2 . 0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev sudo apt install python-dev python-numpy libtbb 2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjas