undefined reference to symbol 'cudaSetDevice'

[ihg1992]

when I compile my c++ program with import libcaffe.so,it occur this :py-R-FCN/caffe/build/lib/libcaffe.so: undefined reference to symbol 'cudaSetDevice' /usr/local/cuda/lib64/libcudart.so.8.0: error adding symbols: DSO missing from command line .
has tried many ways ,but can't solve it .can you help me ,thanks so much~~