在Ubuntu上编译时遇到找不到库的问题，如-lcufft、-lnpps等。原因是CUDA库没有被正确链接。解决办法是在Makefile中添加-L/usr/local/cuda-7.0/lib64到库路径，或在/etc/ld.so.conf中增加该路径并运行sudo ldconfig更新链接配置。
出现的问题：
g++ -O3 -Wno-unused-result -fopenmp -msse2 XXX.o main.o -o main /usr/local/lib/libopencv_calib3d.so /usr/local/lib/libopencv_contrib.so /usr/local/lib/libopencv_core.so /usr/local/lib/libopencv_features2d.so /usr/local/lib/libopencv_flann.so /usr/local/lib/libopencv_gpu.so /usr/local/lib/libopencv_highgui.so /usr/local/lib/libopencv_imgproc.so /usr/local/lib/libopencv_legacy.so /usr/local/lib/libopencv_ml.so /usr/local/lib/libopencv_nonfree.so /usr/local/lib/libopencv_objdetect.so /usr/local/lib/libopencv_ocl.so /usr/local/lib/libopencv_photo.so /usr/local/lib/libopencv_stitching.so /usr/local/lib/libopencv_superres.so /usr/local/lib/libopencv_ts.a /usr/local/lib/libopencv_video.so /usr/local/lib/libopencv_videostab.so -lcufft -lnpps -lnppi -lnppc -lcudart -lrt -lpthread -lm -ldl -L./SDK/lib -lfacesdk -lfinancepro ./SDK/lib/libfw_cv.a
/usr/bin/ld: cannot find -lcufft
/usr/bin/ld: cannot find -lnpps
/usr/bin/ld: cannot find -lnppi
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