"linker command fail" in MacOS 12.5

berak · February 13, 2023, 5:15pm

seems to be a ‘known issue’

you probably need to set BUILD_ZLIB flag to ‘OFF’ in cmake, & try again…
gl !

github.com/opencv/opencv

Issues on OpenCV 4.5.5 compiling from scratch on newer macOS (Intel chip, macOS Monterey)

opened 01:00AM - 05 Jan 22 UTC

sharbel97

question (invalid tracker) category: build/install platform: ios/osx incomplete category: 3rdparty

##### System information (version) - OpenCV => 4.5.5 - Operating System / Platform => macOS Monterey 12.0.1, 64 Bit - Compiler => gcc-11, local ##### Detailed description This is an issue I came across when I tried configuring OpenCV for C++ development after using it with Python for few weeks. I tried to install the "cutting-edge" version from GitHub directly and not use the Homebrew binaries. After cloning the repo, I created a build folder inside, and used CMake to configure build files, when this was finished, I used the 'make all' command to compile. This is when the issue happens. ##### Steps to reproduce I followed the instructions in the book "Building Computer Vision Projects with OpenCV4 and C++" and I'll describe here the steps that led to an error on my machine: - Install CMake - Download latest version of OpenCV from GitHub, unzip anywhere (I git cloned it in /usr/local/Cellar) - Go to OpenCV director (cd /full/path/to/opencv) - make new directory called 'build' && cd into 'build' - Now we call CMake with this command: ```cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/full/path/to/opencv/build -D INSTALL_C_EXAMPLES=ON -D BUILD_EXAMPLES=ON ../``` - I tried both CMake via command line and using the actual CMake application, both led to the same result. - Now to install OpenCV, inside the build folder, I call: ```make -j4``` - The j4 flag indicates that we should use four cores to install (though I've tried calling ```make``` by itself and it still led to the same error, so this can't be it. - This is where it starts to build targets, here is the error output after running ```make``` second time (because it's cleaner than first, less to copy/paste). ``` sharbel@sharbel-MacBook-Pro build % make all [ 0%] Built target opencv_highgui_plugins Consolidate compiler generated dependencies of target libopenjp2 [ 1%] Built target libopenjp2 [ 1%] Built target opencv_videoio_plugins Consolidate compiler generated dependencies of target ittnotify [ 1%] Built target ittnotify Consolidate compiler generated dependencies of target zlib [ 2%] Built target zlib Consolidate compiler generated dependencies of target ippiw [ 3%] Built target ippiw Consolidate compiler generated dependencies of target opencv_core [ 8%] Built target opencv_core Consolidate compiler generated dependencies of target opencv_imgproc [ 12%] Built target opencv_imgproc Consolidate compiler generated dependencies of target libjpeg-turbo [ 15%] Built target libjpeg-turbo Consolidate compiler generated dependencies of target libpng [ 16%] Built target libpng Consolidate compiler generated dependencies of target libtiff [ 18%] Built target libtiff Consolidate compiler generated dependencies of target libwebp [ 24%] Built target libwebp Consolidate compiler generated dependencies of target opencv_imgcodecs make[2]: *** No rule to make target `zlib', needed by `lib/libopencv_imgcodecs.4.5.5.dylib'. Stop. make[1]: *** [modules/imgcodecs/CMakeFiles/opencv_imgcodecs.dir/all] Error 2 make: *** [all] Error 2 ``` I've searched through all tutorials, they each have a flaw and most seem to be outdated or not specific. OpenCV4 works just fine when I use Xcode, because apparently Xcode is able to find the dynamic libraries it's looking for because [Apple changed the location of the libraries](https://developer.apple.com/forums/thread/655588) on newer OS's and properly updated Xcode to handle this, but CMakeLists isn't equipped with that ability, therefore builds are failing. (just a hypothesis, collab with [scawful](https://github.com/scawful)). ##### Issue submission checklist - [x] I report the issue, it's not a question  - [x] I checked the problem with documentation, FAQ, open issues, forum.opencv.org, Stack Overflow, etc and have not found solution  - [x] I updated to latest OpenCV version and the issue is still there  - [x] There is reproducer code and related data files: videos, images, onnx, etc

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"linker command fail" in MacOS 12.5

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