Failed to build iOS framework with --dynamic --legacy_build arguments.

[utibenkei]

System information (version)

• OpenCV => 4.5.2
• Operating System / Platform => macOS Catalina 10.15.7
• Xcode => 12.2
• cmake => 3.20.0
• platform => iOS

Detailed description

Failed to build iOS framework with --dynamic --legacy_build arguments.

Steps to reproduce

python opencv/platforms/ios/build_framework.py --contrib opencv_contrib --dynamic --legacy_build ios

Undefined symbols for architecture armv7:
  "_kCVPixelBufferCGImageCompatibilityKey", referenced from:
      -[CvVideoCamera pixelBufferFromCGImage:] in libopencv_world.a(cap_ios_video_camera.o)
  "_OBJC_CLASS_$_CALayer", referenced from:
      objc-class-ref in libopencv_world.a(cap_ios_video_camera.o)
  "_CGAffineTransformMakeRotation", referenced from:
      -[CvVideoCamera adjustLayoutToInterfaceOrientation:] in libopencv_world.a(cap_ios_video_camera.o)
      -[CvVideoCamera layoutPreviewLayer] in libopencv_world.a(cap_ios_video_camera.o)
  "_OBJC_CLASS_$_AVCaptureStillImageOutput", referenced from:
      objc-class-ref in libopencv_world.a(cap_ios_photo_camera.o)

All results are here.
log.txt

However, when the --legacy_build argument was excluded, the iOS framework was successfully built.
python opencv/platforms/ios/build_framework.py --contrib opencv_contrib --dynamic ios

Issue submission checklist

• I report the issue, it's not a question

• I checked the problem with documentation, FAQ, open issues,
  forum.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