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build_opencv.sh
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build_opencv.sh
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#!/usr/bin/env bash
# 2019 Michael de Gans
set -e
# change default constants here:
readonly PREFIX=/usr/local # install prefix, (can be ~/.local for a user install)
readonly DEFAULT_VERSION=4.4.0 # controls the default version (gets reset by the first argument)
readonly CPUS=$(nproc) # controls the number of jobs
# better board detection. if it has 6 or more cpus, it probably has a ton of ram too
if [[ $CPUS -gt 5 ]]; then
# something with a ton of ram
JOBS=$CPUS
else
JOBS=1 # you can set this to 4 if you have a swap file
# otherwise a Nano will choke towards the end of the build
fi
cleanup () {
# https://stackoverflow.com/questions/226703/how-do-i-prompt-for-yes-no-cancel-input-in-a-linux-shell-script
while true ; do
echo "Do you wish to remove temporary build files in /tmp/build_opencv ? "
if ! [[ "$1" -eq "--test-warning" ]] ; then
echo "(Doing so may make running tests on the build later impossible)"
fi
read -p "Y/N " yn
case ${yn} in
[Yy]* ) rm -rf /tmp/build_opencv ; break;;
[Nn]* ) exit ;;
* ) echo "Please answer yes or no." ;;
esac
done
}
setup () {
cd /tmp
if [[ -d "build_opencv" ]] ; then
echo "It appears an existing build exists in /tmp/build_opencv"
cleanup
fi
mkdir build_opencv
cd build_opencv
}
git_source () {
echo "Getting version '$1' of OpenCV"
git clone --depth 1 --branch "$1" https://github.com/opencv/opencv.git
git clone --depth 1 --branch "$1" https://github.com/opencv/opencv_contrib.git
}
install_dependencies () {
# open-cv has a lot of dependencies, but most can be found in the default
# package repository or should already be installed (eg. CUDA).
echo "Installing build dependencies."
sudo apt-get update
sudo apt-get dist-upgrade -y --autoremove
sudo apt-get install -y \
build-essential \
cmake \
git \
gfortran \
libatlas-base-dev \
libavcodec-dev \
libavformat-dev \
libavresample-dev \
libcanberra-gtk3-module \
libdc1394-22-dev \
libeigen3-dev \
libglew-dev \
libgstreamer-plugins-base1.0-dev \
libgstreamer-plugins-good1.0-dev \
libgstreamer1.0-dev \
libgtk-3-dev \
libjpeg-dev \
libjpeg8-dev \
libjpeg-turbo8-dev \
liblapack-dev \
liblapacke-dev \
libopenblas-dev \
libpng-dev \
libpostproc-dev \
libswscale-dev \
libtbb-dev \
libtbb2 \
libtesseract-dev \
libtiff-dev \
libv4l-dev \
libxine2-dev \
libxvidcore-dev \
libx264-dev \
pkg-config \
python-dev \
python-numpy \
python3-dev \
python3-numpy \
python3-matplotlib \
qv4l2 \
v4l-utils \
v4l2ucp \
zlib1g-dev
}
configure () {
local CMAKEFLAGS="
-D BUILD_EXAMPLES=OFF
-D BUILD_opencv_python2=ON
-D BUILD_opencv_python3=ON
-D CMAKE_BUILD_TYPE=RELEASE
-D CMAKE_INSTALL_PREFIX=${PREFIX}
-D CUDA_ARCH_BIN=5.3,6.2,7.2
-D CUDA_ARCH_PTX=
-D CUDA_FAST_MATH=ON
-D CUDNN_VERSION='8.0'
-D EIGEN_INCLUDE_PATH=/usr/include/eigen3
-D ENABLE_NEON=ON
-D OPENCV_DNN_CUDA=ON
-D OPENCV_ENABLE_NONFREE=ON
-D OPENCV_EXTRA_MODULES_PATH=/tmp/build_opencv/opencv_contrib/modules
-D OPENCV_GENERATE_PKGCONFIG=ON
-D WITH_CUBLAS=ON
-D WITH_CUDA=ON
-D WITH_CUDNN=ON
-D WITH_GSTREAMER=ON
-D WITH_LIBV4L=ON
-D WITH_OPENGL=ON"
if [[ "$1" != "test" ]] ; then
CMAKEFLAGS="
${CMAKEFLAGS}
-D BUILD_PERF_TESTS=OFF
-D BUILD_TESTS=OFF"
fi
echo "cmake flags: ${CMAKEFLAGS}"
cd opencv
mkdir build
cd build
cmake ${CMAKEFLAGS} .. 2>&1 | tee -a configure.log
}
main () {
local VER=${DEFAULT_VERSION}
# parse arguments
if [[ "$#" -gt 0 ]] ; then
VER="$1" # override the version
fi
if [[ "$#" -gt 1 ]] && [[ "$2" == "test" ]] ; then
DO_TEST=1
fi
# prepare for the build:
setup
install_dependencies
git_source ${VER}
if [[ ${DO_TEST} ]] ; then
configure test
else
configure
fi
# start the build
make -j${JOBS} 2>&1 | tee -a build.log
if [[ ${DO_TEST} ]] ; then
make test 2>&1 | tee -a test.log
fi
# avoid a sudo make install (and root owned files in ~) if $PREFIX is writable
if [[ -w ${PREFIX} ]] ; then
make install 2>&1 | tee -a install.log
else
sudo make install 2>&1 | tee -a install.log
fi
cleanup --test-warning
}
main "$@"