adjust opencv build script

Author: Maik Zickermann

jetson_nano/build_opencv/build_opencv.sh

@@ -5,7 +5,7 @@ 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 DEFAULT_VERSION=4.2.0 # 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
@@ -54,7 +54,6 @@ install_dependencies () {
  # 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 \
@@ -90,34 +89,39 @@ install_dependencies () {
  libxvidcore-dev \
  libx264-dev \
  pkg-config \
- python-dev \
- python-numpy \
  python3-dev \
  python3-numpy \
  python3-matplotlib \
  qv4l2 \
  v4l-utils \
- v4l2ucp \
  zlib1g-dev
+ # python-dev \
+ # python-numpy \
+ # v4l2ucp \
 }
 
 configure () {
  local CMAKEFLAGS="
  -D BUILD_EXAMPLES=OFF
- -D BUILD_opencv_python2=ON
+ -D BUILD_PERF_TESTS=OFF
+ -D BUILD_TESTS=OFF
+ -D BUILD_opencv_python2=OFF
  -D BUILD_opencv_python3=ON
+-D CUDA_TOOLKIT_ROOT_DIR=/usr/local/cuda-10.0
  -D CMAKE_BUILD_TYPE=RELEASE
+ -D CMAKE_C_COMPILER=/usr/bin/gcc-7
+ -D CMAKE_CXX_COMPILER=/usr/bin/g++-7
  -D CMAKE_INSTALL_PREFIX=${PREFIX}
- -D CUDA_ARCH_BIN=5.3,6.2,7.2
+ -D CUDA_ARCH_BIN=5.3
  -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 OPENCV_PYTHON3_INSTALL_PATH=/usr/local/lib/python3.8/dist-packages
  -D WITH_CUBLAS=ON
  -D WITH_CUDA=ON
  -D WITH_CUDNN=ON