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build_xcframework.py fails if the OpenCV directory is under /private/var #26712

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#26713
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build_xcframework.py fails if the OpenCV directory is under /private/var#26712
#26713
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homuler
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bugcategory: build/installplatform: ios/osx
Milestone
4.12.0
@homuler

Description

@homuler
homuler
opened on Jan 5, 2025

System Information

OpenCV version: 4.10.0
Operating System / Platform: macOS Sonoma 14.5
CMake version: 3.30.2
Xcode version: 16.2
Python version: 3.12.5

Detailed description

When OpenCV directory is placed under /private/var, build_xcframework.py fails with the following error.

CompileC /private/var/tmp/opencv-test/out/iphoneos/build/build-arm64-iphoneos/modules/objc/framework_build/build/opencv2.build/Release-iphoneos/Objects-normal/arm64/MatQuickLook.o /private/var/tmp/opencv-test/out/iphoneos/build/build-arm64-iphoneos/modules/objc_bindings_generator/ios/gen/objc/imgcodecs/MatQuickLook.mm normal arm64 objective-c++ com.apple.compilers.llvm.clang.1_0.compiler (in target 'opencv2' from project 'opencv2')
    cd /private/var/tmp/opencv-test/out/iphoneos/build/build-arm64-iphoneos/modules/objc_bindings_generator/ios/gen
    
    Using response file: /private/var/tmp/opencv-test/out/iphoneos/build/build-arm64-iphoneos/modules/objc/framework_build/build/opencv2.build/Release-iphoneos/Objects-normal/arm64/af3fcb34312c57c0f52879cdce924b91-common-args.resp
    
    /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -x objective-c++ -ivfsstatcache /var/folders/wl/rp5twb9s5391yw5bljspp9yw0000gn/C/com.apple.DeveloperTools/16.2-16C5032a/Xcode/SDKStatCaches.noindex/iphoneos18.2-22C146-d5b9239ec3bf5b3adbecdf21472871e3.sdkstatcache -fmessage-length\=0 -fdiagnostics-show-note-include-stack -fmacro-backtrace-limit\=0 -fno-color-diagnostics -Wno-trigraphs -Wno-missing-field-initializers -Wno-missing-prototypes -Wno-return-type -Wno-implicit-atomic-properties -Wno-objc-interface-ivars -Wno-arc-repeated-use-of-weak -Wno-non-virtual-dtor -Wno-overloaded-virtual -Wno-exit-time-destructors -Wno-missing-braces -Wparentheses -Wswitch -Wno-unused-function -Wno-unused-label -Wno-unused-parameter -Wno-unused-variable -Wunused-value -Wno-empty-body -Wno-uninitialized -Wno-unknown-pragmas -Wno-shadow -Wno-four-char-constants -Wno-conversion -Wno-constant-conversion -Wno-int-conversion -Wno-bool-conversion -Wno-enum-conversion -Wno-float-conversion -Wno-non-literal-null-conversion -Wno-objc-literal-conversion -Wshorten-64-to-32 -Wno-newline-eof -Wno-selector -Wno-strict-selector-match -Wno-undeclared-selector -Wno-deprecated-implementations -Wno-c++11-extensions -Wno-implicit-fallthrough -fstrict-aliasing -Wprotocol -Wdeprecated-declarations -Winvalid-offsetof -Wno-sign-conversion -Wno-infinite-recursion -Wno-move -Wno-comma -Wno-block-capture-autoreleasing -Wno-strict-prototypes -Wno-range-loop-analysis -Wno-semicolon-before-method-body -Wno-incomplete-umbrella @/private/var/tmp/opencv-test/out/iphoneos/build/build-arm64-iphoneos/modules/objc/framework_build/build/opencv2.build/Release-iphoneos/Objects-normal/arm64/af3fcb34312c57c0f52879cdce924b91-common-args.resp -MMD -MT dependencies -MF /private/var/tmp/opencv-test/out/iphoneos/build/build-arm64-iphoneos/modules/objc/framework_build/build/opencv2.build/Release-iphoneos/Objects-normal/arm64/MatQuickLook.d --serialize-diagnostics /private/var/tmp/opencv-test/out/iphoneos/build/build-arm64-iphoneos/modules/objc/framework_build/build/opencv2.build/Release-iphoneos/Objects-normal/arm64/MatQuickLook.dia -c /private/var/tmp/opencv-test/out/iphoneos/build/build-arm64-iphoneos/modules/objc_bindings_generator/ios/gen/objc/imgcodecs/MatQuickLook.mm -o /private/var/tmp/opencv-test/out/iphoneos/build/build-arm64-iphoneos/modules/objc/framework_build/build/opencv2.build/Release-iphoneos/Objects-normal/arm64/MatQuickLook.o
/private/var/tmp/opencv-test/out/iphoneos/build/build-arm64-iphoneos/modules/objc_bindings_generator/ios/gen/objc/imgcodecs/MatQuickLook.mm:10:9: fatal error: 'Imgproc.h' file not found
   10 | #import "Imgproc.h"
      |         ^~~~~~~~~~~
1 error generated.

It seems that gen_objc.py is ignoring some files when generating header files, and under certain conditions, it ends up ignoring the necessary header files.

opencv/modules/objc/generator/gen_objc.py

Lines 1657 to 1665 in ff18c9c

re_bad = re.compile(r'(private|.inl.hpp$|_inl.hpp$|.detail.hpp$|.details.hpp$|_winrt.hpp$|/cuda/|/legacy/)')
# .h files before .hpp
h_files = []
hpp_files = []
for root, dirnames, filenames in os.walk(os.path.join(module_location, 'include')):
h_files += [os.path.join(root, filename) for filename in fnmatch.filter(filenames, '*.h')]
hpp_files += [os.path.join(root, filename) for filename in fnmatch.filter(filenames, '*.hpp')]
srcfiles = h_files + hpp_files
srcfiles = [f for f in srcfiles if not re_bad.search(f.replace('\\', '/'))]

For example, when trying to build OpenCV using Bazel, this issue occurs because Bazel places the code under /private/var/tmp.

Steps to reproduce

  1. clone the repository under /private/var/tmp
  2. run platforms/apple/build_xcframework.py --iphoneos_archs arm64 --build_only_specified_archs --out out

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 any solution
  • I updated to the latest OpenCV version and the issue is still there
  • There is reproducer code and related data files (videos, images, onnx, etc)

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