Ubuntu18源码编译OpenCV4.3

参考资料

过程

首先更新包

# Install the newest versions of all packages currently installed
sudo apt-get -y upgrade
# Handles changing dependencies with new versions of packages
sudo apt-get -y dist-upgrade
# Remove packages that are now no longer needed
sudo apt-get -y autoremove

安装OpenCV所需依赖

# Build tools:
sudo apt-get install -y build-essential cmake

# GUI (if you want to use GTK instead of Qt, replace 'qt5-default' with 'libgtkglext1-dev' and remove '-DWITH_QT=ON' option in CMake):
sudo apt-get install -y qt5-default libvtk6-dev

# Media I/O:
sudo apt-get install -y zlib1g-dev libjpeg-dev libwebp-dev libpng-dev libtiff5-dev libjasper-dev libopenexr-dev libgdal-dev

# Video I/O:
sudo apt-get install -y libdc1394-22-dev libavcodec-dev libavformat-dev libswscale-dev libtheora-dev libvorbis-dev libxvidcore-dev libx264-dev yasm libopencore-amrnb-dev libopencore-amrwb-dev libv4l-dev libxine2-dev

# Parallelism and linear algebra libraries:
sudo apt-get install -y libtbb-dev libeigen3-dev

# Python:
sudo apt-get install -y python-dev python-tk python-numpy python3-dev python3-tk python3-numpy

# Java:
sudo apt-get install -y ant default-jdk

# Documentation:
sudo apt-get install -y doxygen

安装过程

mkdir build & cd build
sudo cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local -D WITH_TBB=ON -D WITH_EIGEN=ON ..
sudo make	# compile
sudo make install	# install
sudo ldconfig	# load config

错误及解决

make过程中报错，查资料后发现是虚拟机的虚拟内存过小，关机后重新调整即可。

c++: internal compiler error: Killed (program cc1plus)

检查是否成功安装OpenCV库
在/samples/cpp/example_cmake下有个工程，编译后，如果成功运行并且显示"Hello OpenCV"，则安装成功
且在/usr/local/includes/下有opencv4的库

最后还有个多版本的问题，查资料后，看到网上很多多版本并存的解决方案，先这样，有空再试。