Missing libs in Opencv

[vfbsilva]

I need to use darknet to run some projects and some libs seem to have moved. I can’t seem to find them.

ldd darknet
        linux-vdso.so.1 (0x00007ffc4e148000)
        libopencv_highgui.so.3.2 => not found
        libopencv_videoio.so.3.2 => not found
        libopencv_imgcodecs.so.3.2 => not found
        libopencv_imgproc.so.3.2 => not found
        libopencv_core.so.3.2 => not found
        libcuda.so.1 => /usr/lib/libcuda.so.1 (0x00007fb98a644000)
        libcudart.so.10.2 => /opt/cuda-10.2/lib64/libcudart.so.10.2 (0x00007fb98a3c6000)
        libcublas.so.10 => /opt/cuda-10.2/lib64/libcublas.so.10 (0x00007fb986110000)
        libcurand.so.10 => /opt/cuda-10.2/lib64/libcurand.so.10 (0x00007fb98206d000)
        libcudnn.so.7 => not found
        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00007fb981e57000)
        libm.so.6 => /usr/lib/libm.so.6 (0x00007fb981d11000)
        libmvec.so.1 => /usr/lib/libmvec.so.1 (0x00007fb981ce5000)
        libgcc_s.so.1 => /usr/lib/libgcc_s.so.1 (0x00007fb981cca000)
        libpthread.so.0 => /usr/lib/libpthread.so.0 (0x00007fb981ca9000)
        libc.so.6 => /usr/lib/libc.so.6 (0x00007fb981add000)
        libdl.so.2 => /usr/lib/libdl.so.2 (0x00007fb981ad6000)
        librt.so.1 => /usr/lib/librt.so.1 (0x00007fb981ac9000)
        /lib64/ld-linux-x86-64.so.2 => /usr/lib64/ld-linux-x86-64.so.2 (0x00007fb98c629000)
        libcublasLt.so.10 => /opt/cuda-10.2/lib64/libcublasLt.so.10 (0x00007fb97fc360

[freggel.doe]

@vfbsilva

darknet

There is no such package in the repositories, is this from an AUR package?
Rebuild the AUR package.

[vfbsilva]

I cannot use the aur package as I have my own fork for work reasons. I just need to know figure out how to find those libs.

[papajoke]

if in repos:

pacman -Fy

pacman -Fx libopencv_imgcodecs.so
extra/opencv 4.5.3-1
    usr/lib/libopencv_imgcodecs.so
    usr/lib/libopencv_imgcodecs.so.4.5
    usr/lib/libopencv_imgcodecs.so.4.5.3

lib found but version wanted 3.2 is too old as libcudnn.so : we have cudnn v8 not 7…
own fork is for old versions

[vfbsilva]

I will check it properly. Thanks a lot.

[freggel.doe]

Own forks/builds need to keep up with used libraries, same as AUR packages.
Rebuild against current versions. If they don’t work for your fork, consider static builds or containers.

[vfbsilva]

I just tried to build the aur package and it shows the same issue. I used to be able to rebuild. I just checked the compatibility chart of cudnn and cuda and theoretically my versions are oki.
https://docs.nvidia.com/deeplearning/cudnn/support-matrix/index.html

[vfbsilva]

The trick was to install opencv2 package from aur. It holds the old headers which cudnn was linked against.