问cuDNN代码示例编译错误

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make all 
Building target: cuDNNtest
Invoking: NVCC Linker
/usr/local/cuda-7.5/bin/nvcc --cudart static -L/usr/local/cuda-7.5/lib64 -L/usr/local/cuda-7.5/targets/x86_64-linux/lib/ -L".../cuda-workspace/cuDNNtest/FreeImage/lib/linux/x86_64" -L/usr/lib -L/usr/local/cuda/lib64 --relocatable-device-code=true -gencode arch=compute_52,code=compute_52 -gencode arch=compute_52,code=sm_52 -link -o  "cuDNNtest"  ./fp16_dev.o ./fp16_emu.o ./mnistCUDNN.o  ./UtilNPP/StopWatchLinux.o   -lcudnn -lFreeImage -lcublas
./mnistCUDNN.o: In function `npp::ImageAllocator<unsigned char, 1ul>::Malloc2D(unsigned int, unsigned int, unsigned int*, bool)':
.../cuda-workspace/cuDNNtest/UtilNPP/ImageAllocatorsNPP.h:76: undefined reference to `nppiMalloc_8u_C1'
./mnistCUDNN.o: In function `npp::ImageAllocator<unsigned char, 1ul>::Free2D(unsigned char*)':
.../cuda-workspace/cuDNNtest/UtilNPP/ImageAllocatorsNPP.h:87: undefined reference to `nppiFree'
collect2: ld returned 1 exit status
make: *** [cuDNNtest] Error 1