Компиляция OpenCV для Android в Windows с помощью CMake – make все еще пытается связать файлы «dll» ⇐ C++

[Anonymous]

Вот как я настроил cmake в корне OpenCV 4.9.0. репозиторий:
cmake -DCMAKE_ANDROID_NDK=D:\...\lib\AndroidSDK\ndk\25.1.8937393 \
-DCMAKE_SYSTEM_NAME=Android \
-B..\OpenCV_4.9.0_builds\android_clang_ndk25 -S. \
-DANDROID_TOOLCHAIN=clang++ \
-DANDROID_ABI=arm64-v8a \
-D CMAKE_BUILD_TYPE=Release \
-D ANDROID_NATIVE_API_LEVEL=24 \
-D WITH_CUDA=OFF \
-D WITH_MATLAB=OFF \
-D BUILD_ANDROID_EXAMPLES=OFF \
-D BUILD_DOCS=OFF \
-D BUILD_PERF_TESTS=OFF \
-D BUILD_TESTS=OFF \
-D ANDROID_STL=c++_shared \
-D BUILD_SHARED_LIBS=ON

Но когда я затем пытаюсь перейти к android_clang_ndk25, я вижу, что он по-прежнему использует файлы заголовков mingw и компоновщик mingw.
Я скомпилировать с помощью:
D:\...\ndk\21.1.6352462\prebuilt\windows-x86_64\bin\make.exe install

И получите ошибки:
ld: error: undefined symbol: std::__once_callable
>>> referenced by C:/Qt/Tools/mingw1120_64/lib/gcc/x86_64-w64-mingw32/11.2.0/include/c++/mutex:710
>>> objects.a(caffe_importer.cpp.obj):(cv::dnn::dnn4_v20231225::(anonymous namespace)::CaffeImporter::extractLayerParams(google::protobuf::Message const&, cv::dnn::dnn4_v20231225::LayerParams&, bool))
>>> referenced by C:/Qt/Tools/mingw1120_64/lib/gcc/x86_64-w64-mingw32/11.2.0/include/c++/mutex:718
>>> objects.a(caffe_importer.cpp.obj):(cv::dnn::dnn4_v20231225::(anonymous namespace)::CaffeImporter::extractLayerParams(google::protobuf::Message const&, cv::dnn::dnn4_v20231225::LayerParams&, bool))
>>> referenced by C:/Qt/Tools/mingw1120_64/lib/gcc/x86_64-w64-mingw32/11.2.0/include/c++/mutex:710
>>> objects.a(caffe_importer.cpp.obj):(cv::dnn::dnn4_v20231225::(anonymous namespace)::CaffeImporter::extractLayerParams(google::protobuf::Message const&, cv::dnn::dnn4_v20231225::LayerParams&, bool))
>>> referenced 1093 more times

ld: error: undefined symbol: std::__once_call
>>> referenced by C:/Qt/Tools/mingw1120_64/lib/gcc/x86_64-w64-mingw32/11.2.0/include/c++/mutex:712
>>> objects.a(caffe_importer.cpp.obj):(cv::dnn::dnn4_v20231225::(anonymous namespace)::CaffeImporter::extractLayerParams(google::protobuf::Message const&, cv::dnn::dnn4_v20231225::LayerParams&, bool))
>>> referenced by C:/Qt/Tools/mingw1120_64/lib/gcc/x86_64-w64-mingw32/11.2.0/include/c++/mutex:719
>>> objects.a(caffe_importer.cpp.obj):(cv::dnn::dnn4_v20231225::(anonymous namespace)::CaffeImporter::extractLayerParams(google::protobuf::Message const&, cv::dnn::dnn4_v20231225::LayerParams&, bool))
>>> referenced by C:/Qt/Tools/mingw1120_64/lib/gcc/x86_64-w64-mingw32/11.2.0/include/c++/mutex:712
>>> objects.a(caffe_importer.cpp.obj):(cv::dnn::dnn4_v20231225::(anonymous namespace)::CaffeImporter::extractLayerParams(google::protobuf::Message const&, cv::dnn::dnn4_v20231225::LayerParams&, bool))
>>> referenced 1082 more times
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [modules\dnn\CMakeFiles\opencv_dnn.dir\build.make bin/libopencv_dnn490.dll] Error 1
make[1]: *** [CMakeFiles\Makefile2 modules/dnn/CMakeFiles/opencv_dnn.dir/all] Error 2
make: *** [Makefile:165: all] Error 2

Примечательно, что после настройки он использует MinGW:
-- General configuration for OpenCV 4.9.0 =====================================
-- Version control: 4.9.0
--
-- Platform:
-- Timestamp: 2024-04-08T09:17:02Z
-- Host: Windows 10.0.19045 AMD64
-- CMake: 3.25.2
-- CMake generator: MinGW Makefiles
-- CMake build tool: C:/Qt/Tools/mingw1120_64/bin/mingw32-make.exe
-- Configuration: Release


Подробнее здесь: https://stackoverflow.com/questions/786 ... es-to-link