Build failed on macOS App with Swift on Xcode due to Undefined symbols _opj_*** #18023
Description
System information (version)
- OpenCV => 4.4.0
- Operating System / Platform => macOS Catalina 10.15.6 (19G73), Swift (5.2.4, 5.3)
- Compiler => Xcode Version 11.6 (11E708), Xcode Version 12.0 beta 3 (12A8169g)
$ swift --version
Apple Swift version 5.2.4 (swiftlang-1103.0.32.9 clang-1103.0.32.53)
Target: x86_64-apple-darwin19.6.0
$ cmake --version
cmake version 3.17.3
$ python --version
Python 2.7.18
$ xcode-select --version
xcode-select version 2373.
Detailed description
I'm developing a Command Line Tool application for macOS on Xcode. When I installed OpenCV 4.4.0, I got an error with "Undefined symbols". So I added the necessary frameworks and libraries, but I don't know which frameworks I should add for these below. The developing app build does not succeed because of these "Undefined symbols" errors.
- _opj_create_compress
- _opj_create_decompress
- _opj_decode
- _opj_destroy_codec
- _opj_encode
- _opj_end_compress
- _opj_image_create
- _opj_image_destroy
- _opj_read_header
- _opj_set_default_decoder_parameters
- _opj_set_default_encoder_parameters
- _opj_set_error_handler
- _opj_set_warning_handler
- _opj_setup_decoder
- _opj_setup_encoder
- _opj_start_compress
- _opj_stream_create_default_file_stream
- _opj_stream_default_create
- _opj_stream_destroy
- _opj_stream_set_read_function
- _opj_stream_set_seek_function
- _opj_stream_set_skip_function
- _opj_stream_set_user_data
- _opj_stream_set_user_data_length
Steps to reproduce
- Download and unzip 4.4.0.zip from https://opencv.org/releases/
- Build opencv2.framework for macOS.
$ cd opencv-4.4.0/platforms/osx
$ python ./build_framework.py .
- Create a new project in Xcode. Choose the "Command Line Tool" of macOS as a template. Choose "Swift".
- Add the
opencv2.frameworkto the "Frameworks and Libraries" section of TARGET. - (Optional) In Build Settings, set the path of the directory where the opencv2.framework is located to "Framework Search Paths".
- In Build Settings, specify
-all_loadfor "Other Linker Flags". (Thanks @komakai atMat initWithUIImage:does not work (Objective-C / Swift) #17532 ) - Make
main.swiftlook like this:
import Foundation
import opencv2
print("Hello, World!")
let fileName = "input.png"
print("Reading the image:", fileName)
let bgrImage = Imgcodecs.imread(filename: fileName)
- Building here will cause a lot of undefined symbol errors.
- Based on the errors, add the following to the "Frameworks and Libraries" section of Target.
- Accelerate.framework
- AppKit.framework
- AVFoundation.framework
- CoreMedia.framework
- CoreVideo.framework
- libc++.tbd
- OpenCL.framework
- Build. 24 "Undefined symbols" errors starting with
_opjare not resolved.
Undefined symbols for architecture x86_64:
"_opj_create_compress", referenced from:
cv::Jpeg2KOpjEncoder::write(cv::Mat const&, std::__1::vector<int, std::__1::allocator<int> > const&) in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_create_decompress", referenced from:
cv::Jpeg2KOpjDecoder::readHeader() in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_decode", referenced from:
cv::Jpeg2KOpjDecoder::readData(cv::Mat&) in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_destroy_codec", referenced from:
cv::Jpeg2KOpjDecoder::~Jpeg2KOpjDecoder() in opencv2(loadsave.o)
cv::Jpeg2KOpjDecoder::readHeader() in opencv2(grfmt_jpeg2000_openjpeg.o)
cv::Jpeg2KOpjEncoder::write(cv::Mat const&, std::__1::vector<int, std::__1::allocator<int> > const&) in opencv2(grfmt_jpeg2000_openjpeg.o)
cv::Jpeg2KOpjDecoder::~Jpeg2KOpjDecoder() in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_encode", referenced from:
cv::Jpeg2KOpjEncoder::write(cv::Mat const&, std::__1::vector<int, std::__1::allocator<int> > const&) in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_end_compress", referenced from:
cv::Jpeg2KOpjEncoder::write(cv::Mat const&, std::__1::vector<int, std::__1::allocator<int> > const&) in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_image_create", referenced from:
cv::Jpeg2KOpjEncoder::write(cv::Mat const&, std::__1::vector<int, std::__1::allocator<int> > const&) in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_image_destroy", referenced from:
cv::Jpeg2KOpjDecoder::~Jpeg2KOpjDecoder() in opencv2(loadsave.o)
cv::Jpeg2KOpjDecoder::readHeader() in opencv2(grfmt_jpeg2000_openjpeg.o)
cv::Jpeg2KOpjEncoder::write(cv::Mat const&, std::__1::vector<int, std::__1::allocator<int> > const&) in opencv2(grfmt_jpeg2000_openjpeg.o)
cv::Jpeg2KOpjDecoder::~Jpeg2KOpjDecoder() in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_read_header", referenced from:
cv::Jpeg2KOpjDecoder::readHeader() in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_set_default_decoder_parameters", referenced from:
cv::Jpeg2KOpjDecoder::readHeader() in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_set_default_encoder_parameters", referenced from:
cv::Jpeg2KOpjEncoder::write(cv::Mat const&, std::__1::vector<int, std::__1::allocator<int> > const&) in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_set_error_handler", referenced from:
cv::(anonymous namespace)::setupLogCallbacks(void**) in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_set_warning_handler", referenced from:
cv::(anonymous namespace)::setupLogCallbacks(void**) in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_setup_decoder", referenced from:
cv::Jpeg2KOpjDecoder::readHeader() in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_setup_encoder", referenced from:
cv::Jpeg2KOpjEncoder::write(cv::Mat const&, std::__1::vector<int, std::__1::allocator<int> > const&) in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_start_compress", referenced from:
cv::Jpeg2KOpjEncoder::write(cv::Mat const&, std::__1::vector<int, std::__1::allocator<int> > const&) in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_stream_create_default_file_stream", referenced from:
cv::Jpeg2KOpjDecoder::readHeader() in opencv2(grfmt_jpeg2000_openjpeg.o)
cv::Jpeg2KOpjEncoder::write(cv::Mat const&, std::__1::vector<int, std::__1::allocator<int> > const&) in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_stream_default_create", referenced from:
cv::Jpeg2KOpjDecoder::readHeader() in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_stream_destroy", referenced from:
cv::Jpeg2KOpjDecoder::~Jpeg2KOpjDecoder() in opencv2(loadsave.o)
cv::Jpeg2KOpjDecoder::readHeader() in opencv2(grfmt_jpeg2000_openjpeg.o)
cv::Jpeg2KOpjEncoder::write(cv::Mat const&, std::__1::vector<int, std::__1::allocator<int> > const&) in opencv2(grfmt_jpeg2000_openjpeg.o)
cv::Jpeg2KOpjDecoder::~Jpeg2KOpjDecoder() in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_stream_set_read_function", referenced from:
cv::Jpeg2KOpjDecoder::readHeader() in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_stream_set_seek_function", referenced from:
cv::Jpeg2KOpjDecoder::readHeader() in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_stream_set_skip_function", referenced from:
cv::Jpeg2KOpjDecoder::readHeader() in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_stream_set_user_data", referenced from:
cv::Jpeg2KOpjDecoder::readHeader() in opencv2(grfmt_jpeg2000_openjpeg.o)
"_opj_stream_set_user_data_length", referenced from:
cv::Jpeg2KOpjDecoder::readHeader() in opencv2(grfmt_jpeg2000_openjpeg.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Issue submission checklist
- I report the issue, it's not a question
- I checked the problem with documentation, FAQ, open issues,
answers.opencv.org, Stack Overflow, etc and have not found solution - I updated to latest OpenCV version and the issue is still there
- There is reproducer code and related data files: videos, images, onnx, etc