message: try to enable caching in travis
diff: @@ -3,7 +3,12 @@ rust:
  - stable
  - beta
  - nightly
  -cache: cargo
  +
  +cache:
  + cargo: true
  + ccache: true
  + directories:
  + - opencv
  sudo: true
  dist: xenial
  @@ -40,11 +45,12 @@ env:
  - Atlas_ROOT_DIR=/usr/include/ # for cmake to find lapacke.h
  before_script:
  - - wget -O- https://github.com/opencv/opencv/archive/$OPENCV_VERSION.tar.gz | tar -xzC ~/build
  - - wget -O- https://github.com/opencv/opencv_contrib/archive/$OPENCV_VERSION.tar.gz | tar -xzC ~/build
  - - mkdir -p ~/build/opencv-$OPENCV_VERSION-build
  - - pushd ~/build/opencv-$OPENCV_VERSION-build
  - - cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_PERF_TESTS=OFF -DBUILD_TESTS=OFF -DINSTALL_TESTS=OFF -DBUILD_DOCS=OFF -DBUILD_EXAMPLES=OFF -DBUILD_opencv_apps=ALL -DWITH_IPP=OFF -DPYTHON_EXECUTABLE=OFF -DINSTALL_PYTHON_EXAMPLES=OFF -DWITH_LAPACK=ON -DWITH_EIGEN=ON -DBUILD_SHARED_LIBS=ON -DWITH_TBB=ON -DOPENCV_ENABLE_NONFREE=ON -DCMAKE_INSTALL_PREFIX=/usr -DOPENCV_EXTRA_MODULES_PATH=~/build/opencv_contrib-$OPENCV_VERSION/modules ~/build/opencv-$OPENCV_VERSION
  + - mkdir ~/build/opencv
  + - wget -O- https://github.com/opencv/opencv/archive/$OPENCV_VERSION.tar.gz | tar -xzC ~/build/opencv
  + - wget -O- https://github.com/opencv/opencv_contrib/archive/$OPENCV_VERSION.tar.gz | tar -xzC ~/build/opencv
  + - mkdir -p ~/build/opencv/opencv-$OPENCV_VERSION-build
  + - pushd ~/build/opencv/opencv-$OPENCV_VERSION-build
  + - cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_PERF_TESTS=OFF -DBUILD_TESTS=OFF -DINSTALL_TESTS=OFF -DBUILD_DOCS=OFF -DBUILD_EXAMPLES=OFF -DBUILD_opencv_apps=ALL -DWITH_IPP=OFF -DPYTHON_EXECUTABLE=OFF -DINSTALL_PYTHON_EXAMPLES=OFF -DWITH_LAPACK=ON -DWITH_EIGEN=ON -DBUILD_SHARED_LIBS=ON -DWITH_TBB=ON -DOPENCV_ENABLE_NONFREE=ON -DCMAKE_INSTALL_PREFIX=/usr -DOPENCV_EXTRA_MODULES_PATH=~/build/opencv/opencv_contrib-$OPENCV_VERSION/modules ~/build/opencv/opencv-$OPENCV_VERSION
  - sudo make -j4 install
  - tree .
  - popd
  