CODEWITHSUNDEEP
linuxopencvcudamakefile
user1186233
user1186233

Reputation: 167

Makefile: build of c++ file on linux, unable to locate cuda libraries in opencv 2.4.6

Hopefully someone can help with this.

After rebuilding OpenCV 2.4.6 with Cuda Toolkit 5.5 on linux, an attempt was made to build a single c++ file that references OpenCV and CUDA using via make and a CLI g++ command. The input and output from each approach are shown below.

The Makefile attempts to reference the *.a files from OpenCV, but is not successful. The CLI g++ command attempts to reference *.so files, which it seems to do, however, some methods appear to be undefined.

Is it necessary for the Makefile to access only the OpenCV *.a files?

Makefile:

CFLAGS = -g Wall 
LIBPATH = /data/content/cuda/opencv-2.4.6/lib
LIBS = -lopencv_calib3d_pch_dephelp -lopencv_contrib_pch_dephelp -lopencv_core_pch_dephelp -lopencv_features2d_pch_dephelp -lopencv_flann_pch_dephelp -lopencv_gpu_pch_dephelp -lopencv_haartraining_engine -lopencv_highgui_pch_dephelp -lopencv_imgproc_pch_dephelp -lopencv_legacy_pch_dephelp -lopencv_ml_pch_dephelp -lopencv_nonfree_pch_dephelp -lopencv_objdetect_pch_dephelp -lopencv_perf_calib3d_pch_dephelp -lopencv_perf_core_pch_dephelp -lopencv_perf_features2d_pch_dephelp -lopencv_perf_gpu_pch_dephelp -lopencv_perf_highgui_pch_dephelp -lopencv_perf_imgproc_pch_dephelp -lopencv_perf_nonfree_pch_dephelp -lopencv_perf_objdetect_pch_dephelp -lopencv_perf_photo_pch_dephelp -lopencv_perf_stitching_pch_dephelp -lopencv_perf_superres_pch_dephelp -lopencv_perf_video_pch_dephelp -lopencv_photo_pch_dephelp -lopencv_stitching_pch_dephelp -lopencv_superres_pch_dephelp -lopencv_test_calib3d_pch_dephelp -lopencv_test_contrib_pch_dephelp -lopencv_test_core_pch_dephelp -lopencv_test_features2d_pch_dephelp -lopencv_test_flann_pch_dephelp -lopencv_test_gpu_pch_dephelp -lopencv_test_highgui_pch_dephelp -lopencv_test_imgproc_pch_dephelp -lopencv_test_legacy_pch_dephelp -lopencv_test_ml_pch_dephelp -lopencv_test_nonfree_pch_dephelp -lopencv_test_objdetect_pch_dephelp -lopencv_test_photo_pch_dephelp -lopencv_test_stitching_pch_dephelp -lopencv_test_superres_pch_dephelp -lopencv_test_video_pch_dephelp -lopencv_ts_pch_dephelp -lopencv_video_pch_dephelp -lopencv_videostab_pch_dephelp -lopencv_gpu -lopencv_highgui
INCLUDEPATH1 = /usr/include/opencv2/core
INCLUDEPATH2 = /usr/include/opencv2/highgui 
INCLUDEPATH3 = /usr/include/opencv2/gpu 

all: tiff2png1.so

tiff2png1.so: main.o 
    g++ -o tiff2png1.so main.o  **-L $(LIBPATH) $(LIB)**

main.o: main.cpp 
    g++ -c main.cpp -g -Wall -I $(INCLUDEPATH1)  -I $(INCLUDEPATH2)  -I $(INCLUDEPATH3) $(LIBPATH)

.PHONY: clean
clean:
    rm -vf tiff2png1.so *.o

Makefile Output:

g++ -o tiff2png1.so main.o -L /data/content/cuda/opencv-2.4.6/lib main.o: In function main': /home/.../main.cpp:13: undefined reference tocv::gpu::getCudaEnabledDeviceCount()' /home/.../main.cpp:15: undefined reference to cv::gpu::getDevice()' /home/.../main.cpp:21: undefined reference tocv::imread(std::basic_string, std::allocator > const&, int)' /home/.../main.cpp:27: undefined reference to cv::gpu::GpuMat::GpuMat(cv::Mat const&)' /home/.../main.cpp:29: undefined reference tocv::gpu::Stream::Null()' /home/.../main.cpp:29: undefined reference to cv::gpu::resize(cv::gpu::GpuMat const&, cv::gpu::GpuMat&, cv::Size_<int>, double, double, int, cv::gpu::Stream&)' /home/.../main.cpp:42: undefined reference tocv::Mat::Mat(cv::gpu::GpuMat const&)' /home/.../main.cpp:49: undefined reference to cv::_InputArray::_InputArray(cv::Mat const&)' ... main.o: In function~GpuMat': /usr/include/opencv2/core/gpumat.hpp:374: undefined reference to `cv::gpu::GpuMat::release()' collect2: ld returned 1 exit status make: * [tiff2png1.so] Error 1

Command Line Build

$ g++ -o tx.exe main.o -L/data/content/cuda/opencv-2.4.6/lib -lopencv_gpu

Command Line Build Output

/data/content/cuda/opencv-2.4.6/lib/libopencv_gpu.so: undefined reference to `cv::gpu::convertTo(cv::gpu::GpuMat const&, cv::gpu::GpuMat&, double, double, CUstream_st*)'

/data/content/cuda/opencv-2.4.6/lib/libopencv_gpu.so: undefined reference to `cv::gpu::setTo(cv::gpu::GpuMat&, cv::Scalar_, cv::gpu::GpuMat const&, CUstream_st*)'

/data/content/cuda/opencv-2.4.6/lib/libopencv_gpu.so: undefined reference to `cv::gpu::setTo(cv::gpu::GpuMat&, cv::Scalar_, CUstream_st*)'

collect2: ld returned 1 exit status

Upvotes: 0

Views: 1376

Answers (1)

awiseman
awiseman

Reputation: 5714

It looks like you may have omitted an 'S' at the end of your variable in the linker target

**LIBS** = -lopencv_calib3d_pch_dephelp ...

tiff2png1.so: main.o 
    g++ -o tiff2png1.so main.o  -L $(LIBPATH) $(**LIB**)

and so the -l options aren't being passed to the linker

g++ -o tiff2png1.so main.o -L /data/content/cuda/opencv-2.4.6/lib **should be here** main.o

Upvotes: 1

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