编译ssd至build时全部错误cv::未定义等

错误中的一部分：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()'

解决方法：

在Makefile文件中找到第195行如：

ifeq ($(USE_OPENCV), 1)

    LIBRARIES +=

在LIBRARIES后添加opencv_videoio和opencv_imgcodecs然后重新编译即可