Error building from Linux tutorial

C++
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1

I was trying to follow the Liunx instructions here: OpenCV: Installation in Linux, but in the build stage I get the following error:

[ 22%] Linking CXX shared library ../../lib/libopencv_imgcodecs.so
CMakeFiles/opencv_imgcodecs.dir/src/grfmt_jpeg.cpp.o: In function `cv::JpegEncoder::write(cv::Mat const&, std::vector<int, std::allocator<int> > const&)':
grfmt_jpeg.cpp:(.text._ZN2cv11JpegEncoder5writeERKNS_3MatERKSt6vectorIiSaIiEE+0x6db): undefined reference to `jpeg_default_qtables'
CMakeFiles/opencv_imgcodecs.dir/src/grfmt_png.cpp.o: In function `cv::PngDecoder::readData(cv::Mat&)':
grfmt_png.cpp:(.text._ZN2cv10PngDecoder8readDataERNS_3MatE+0x3cb): undefined reference to `png_get_eXIf_1'
grfmt_png.cpp:(.text._ZN2cv10PngDecoder8readDataERNS_3MatE+0x491): undefined reference to `png_get_eXIf_1'
/usr/bin/ld: link errors found, deleting executable `../../lib/libopencv_imgcodecs.so.4.7.0'
/usr/bin/sha1sum: ../../lib/libopencv_imgcodecs.so.4.7.0: No such file or directory
collect2: error: ld returned 1 exit status
gmake[2]: *** [lib/libopencv_imgcodecs.so.4.7.0] Error 1
gmake[1]: *** [modules/imgcodecs/CMakeFiles/opencv_imgcodecs.dir/all] Error 2
gmake: *** [all] Error 2

Do you have any suggestions? I tried to modify LD_LIBRARY_PATH to point to libpng.so, but this didn’t help.

2

looks like there’s an unexpected png version installed on your box. try to use the 3rd party version, that comes with the opencv src code:

cmake -DBUILD_PNG=ON ....

(so it won’t rely on your system’s libpng anymore)

3

Thanks, I did the same for JPEG and TIFF:
cmake -DBUILD_ZLIB=ON -DBUILD_JPEG=ON -DBUILD_PNG=ON -DBUILD_TIFF=ON …/opencv-master
It looks like it helped, but now I’m stuck with a different error:

[ 72%] Linking CXX executable ../../bin/opencv_test_highgui
/usr/lib64/libfontconfig.so: undefined reference to `uuid_parse@UUID_1.0'
/usr/lib64/libfontconfig.so: undefined reference to `uuid_generate_random@UUID_1.0'
/usr/lib64/libfontconfig.so: undefined reference to `uuid_unparse@UUID_1.0'
/usr/lib64/libfontconfig.so: undefined reference to `uuid_copy@UUID_1.0'
/usr/bin/ld: link errors found, deleting executable `../../bin/opencv_test_highgui'
/usr/bin/sha1sum: ../../bin/opencv_test_highgui: No such file or directory
collect2: error: ld returned 1 exit status
gmake[2]: *** [bin/opencv_test_highgui] Error 1
gmake[1]: *** [modules/highgui/CMakeFiles/opencv_test_highgui.dir/all] Error 2
gmake: *** [all] Error 2

I’m working on a remote server.

4

hmm do you really need any gui there ?

also, just curious, do you have root access on that box ?
(more info on that server, please !)

how do you plan to use it, c++ dev ? python ?

5

if you run your program on a remote server, you will not get any GUI on your local computer from that program.

the truth is that yes there are ways but it’s a bad idea and “no” is the answer that doesn’t complicate your situation further.