build_release/lib/libcaffe.so: undefined reference to cv::imread(cv::String const&, int)'

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.build_release/lib/libcaffe.so: undefined reference to `cv::imdecode(cv::_InputArray const&, int)'
collect2: error: ld returned 1 exit status
make: *** [.build_release/tools/convert_imageset.bin] Error 1

solution:

add "opencv_imgcodecs" in Makefile.(LIBRARIES += glog gflags protobuf leveldb snappy \
lmdb boost_system hdf5_hl hdf5 m \
opencv_core opencv_highgui opencv_imgproc opencv_imgcodecs)
If you input "make all",the problem is the same again.But if you delete all the file in build(rm -rf ./build/*) before "make all"(I use make clean ),you will success.I just success

github 讨论帖： https://github.com/BVLC/caffe/issues/2348


ps:
build/lib/libcaffe.a(image_io.o): In function caffe::ReadVideoToVolumeDatum(char const*, int, int, int, int, int, int, caffe::VolumeDatum*)': image_io.cpp:(.text+0x1905): undefined reference tocv::VideoCapture::VideoCapture()'
image_io.cpp:(.text+0x1abe): undefined reference to cv::VideoCapture::open(cv::String const&)' image_io.cpp:(.text+0x1ace): undefined reference tocv::VideoCapture::isOpened() const'
image_io.cpp:(.text+0x1c91): undefined reference to cv::VideoCapture::~VideoCapture()' image_io.cpp:(.text+0x1d22): undefined reference tocv::VideoCapture::get(int) const'
image_io.cpp:(.text+0x1d6d): undefined reference to cv::VideoCapture::set(int, double)' image_io.cpp:(.text+0x1de1): undefined reference tocv::VideoCapture::set(int, double)'
image_io.cpp:(.text+0x1e35): undefined reference to cv::VideoCapture::read(cv::_OutputArray const&)' image_io.cpp:(.text+0x1f7e): undefined reference tocv::VideoCapture::release()'
image_io.cpp:(.text+0x1fc3): undefined reference to cv::VideoCapture::read(cv::_OutputArray const&)' image_io.cpp:(.text+0x22e9): undefined reference tocv::VideoCapture::~VideoCapture()'
collect2: error: ld returned 1 exit status
make: *** [build/tools/blob_proto_to_blob_binary.bin] Error 1
make: *** Waiting for unfinished jobs....

same solution by adding opencv_videoio to LIBRARIES in the Makefile