OpenCV 4.3.0 installation example

install-opencv-4.3.0.sh

# Set the version we use
pkgver=4.3.0

# Download and unpack OpenCV source code
# Skip it if you already downloaded the file.
aria2c https://github.com/opencv/opencv/archive/$pkgver.tar.gz
tar -xf opencv-$pkgver.tar.gz

# Download and unpack OpenCV extra and plugins source code
# Skip it if you already downloaded the file.
aria2c https://github.com/opencv/opencv_contrib/archive/$pkgver.tar.gz
tar -xf opencv_contrib-$pkgver.tar.gz

# Create a designated dir for build
mkdir build
cd build

# Run cmake along with options
# It runs dependency checks and produce Makefile.
# You have to replace `$pkgver` with value above,
# the `../opencv-$pkgver` path points to the dir containing `CMakeLists.txt`.
cmake ../opencv-$pkgver \
    -DWITH_OPENCL=ON \
    -DWITH_OPENGL=ON \
    -DWITH_TBB=ON \
    -DWITH_VULKAN=ON \
    -DWITH_QT=ON \
    -DBUILD_WITH_DEBUG_INFO=OFF \
    -DBUILD_TESTS=OFF \
    -DBUILD_PERF_TESTS=OFF \
    -DBUILD_EXAMPLES=ON \
    -DINSTALL_C_EXAMPLES=ON \
    -DINSTALL_PYTHON_EXAMPLES=ON \
    -DCMAKE_INSTALL_PREFIX=/opt/opencv$pkgver \
    -DCPU_BASELINE_DISABLE=SSE3 \
    -DCPU_BASELINE_REQUIRE=SSE2 \
    -DOPENCV_EXTRA_MODULES_PATH="../opencv_contrib-$pkgver/modules" \
    -DOPENCV_GENERATE_PKGCONFIG=ON \
    -DOPENCV_ENABLE_NONFREE=ON \
    -DOPENCV_JNI_INSTALL_PATH=lib \
    -DOPENCV_GENERATE_SETUPVARS=OFF \
    -DEIGEN_INCLUDE_PATH=/usr/include/eigen3 \
    -DCMAKE_BUILD_TYPE=Release \
    -DCMAKE_C_COMPILER=/usr/bin/gcc-8 \
    -DCMAKE_CXX_COMPILER=/usr/bin/g++-8

# Compile th package, the `-j16` means use up to 16 threads
make -j16

# Install the package.
# If the installed dir requires root (here is `/opt/opencv$pkgver`), place `sudo` beforehand.
sudo make install