获取源代码
https://opencv.org/releases.html
安装依赖库
借助系统自带的opencv简化依赖安装步骤
$ sudo apt-get install -y libopencv-dev
解压编译
$ mkdir opencv
$ cd opencv
$ tar -zxvf opencv-2.4.13.5.tar.gz
$ mkdir build (因为opencv不允许在源码目录树下编译所以新建一个编译的文件夹)
$ cd build
$ cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local/lib/opencv .. /opencv-2.4.13.5
$ make -j 4
替换已经安装的版本
$ sudo make install
编译出错的处理
如果执行 cmake时候出现如下错误信息
CMake Error at CMakeLists.txt:11 (message):
FATAL: In-source builds are not allowed.
You should create separate directory for build files.
– Configuring incomplete, errors occurred!
则应该是已经执行过 cmake,导致根目录下生成了 CMakeCache.txt,需要删除 CMakeCache.txt再次执行编译即可。