Android Studio NDK 链接器错误未定义对“cv::_OutputArray::_OutputArray(cv::Mat&)”的引用

我正在开发一个使用 NDK 的 Android 项目，其中我使用了 opencv 来进行一些捕获和图像效果的工作。我的 Android.mk 如下所示：

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

include path/to/OpenCV.mk

LOCAL_MODULE    := Scanner

LOCAL_SRC_FILES := scan.cpp

LOCAL_LDLIBS    += -lz -lm -llog -landroid -ldl -lstdc++

LOCAL_LDFLAGS +=  -ljnigraphics -fexceptions -std=c++11 -L$(LOCAL_PATH)/sdk/native/jni/libs/armeabi-v7a -L$(LOCAL_PATH)/sdk/native/jni/3rdparty/libs/armeabi-v7a -I$(LOCAL_PATH)/sdk/native/jni/include -I$(LOCAL_PATH)/sdk/native/jni/include/opencv2/core -I$(LOCAL_PATH)/sdk/native/jni/include/opencv2/calib3d -I$(LOCAL_PATH)/sdk/native/jni/include/opencv2/contrib -I$(LOCAL_PATH)/sdk/native/jni/include/opencv2/features2d -I$(LOCAL_PATH)/sdk/native/jni/include/opencv2/flann -I$(LOCAL_PATH)/sdk/native/jni/include/opencv2/highgui -I$(LOCAL_PATH)/sdk/native/jni/include/opencv2/imgproc -I$(LOCAL_PATH)/sdk/native/jni/include/opencv2/legacy -I$(LOCAL_PATH)/sdk/native/jni/include/opencv2/ml -I$(LOCAL_PATH)/sdk/native/jni/include/opencv2/objdetect -I$(LOCAL_PATH)/sdk/native/jni/include/opencv2/ocl -I$(LOCAL_PATH)/sdk/native/jni/include/opencv2/photo -I$(LOCAL_PATH)/sdk/native/jni/include/opencv2/stitching -I$(LOCAL_PATH)/sdk/native/jni/include/opencv2/superres -I$(LOCAL_PATH)/sdk/native/jni/include/opencv2/ts -I$(LOCAL_PATH)/sdk/native/jni/include/opencv2/video -I$(LOCAL_PATH)/sdk/native/jni/include/opencv2/videostab -I$(LOCAL_PATH)/sdk/native/jni/include/opencv2

LOCAL_STATIC_LIBRARIES := opencv_shape opencv_stitching opencv_objdetect opencv_superres opencv_videostab opencv_calib3d opencv_features2d opencv_highgui opencv_videoio opencv_imgcodecs opencv_video opencv_photo opencv_ml opencv_flann opencv_imgproc opencv_core opencv_ts IlmImf libjasper libjpeg libpng libtiff libwebp tbb

include $(BUILD_SHARED_LIBRARY)

虽然我链接了所有 opencv 库并指定了正确的路径（通过更改路径验证），但我收到以下链接器错误：

../sdk/native/jni/include/opencv2/core/mat.hpp:335: error: undefined reference to 'cv::_OutputArray::_OutputArray(cv::Mat&)'
jni/scan.cpp:33: error: undefined reference to 'cv::_InputArray::_InputArray(cv::Mat const&)'
jni/scan.cpp:33: error: undefined reference to 'cv::_OutputArray::_OutputArray(cv::Mat&)'
jni/scan.cpp:65: error: undefined reference to 'cv::_InputArray::_InputArray(cv::Mat const&)'
jni/scan.cpp:65: error: undefined reference to 'cv::_InputArray::_InputArray(cv::Mat const&)'
jni/scan.cpp:72: error: undefined reference to 'cv::_InputArray::_InputArray(cv::Mat const&)'
jni/scan.cpp:48: error: undefined reference to 'cv::_OutputArray::_OutputArray(cv::Mat&)'
jni/scan.cpp:51: error: undefined reference to 'cv::_OutputArray::_OutputArray(cv::Mat&)'
jni/scan.cpp:58: error: undefined reference to 'cv::findContours(cv::_OutputArray const&, cv::_OutputArray const&, int, int, cv::Point_<int>)'
..sdk/native/jni/include/opencv2/core/mat.hpp:276: error: undefined reference to 'vtable for cv::_OutputArray'
..Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: the vtable symbol may be undefined because the class is missing its key function
..sdk/native/jni/include/opencv2/core/mat.hpp:276: error: undefined reference to 'vtable for cv::_OutputArray'
..Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: the vtable symbol may be undefined because the class is missing its key function
jni/scan.cpp:162: error: undefined reference to 'cv::findContours(cv::_OutputArray const&, cv::_OutputArray const&, int, int, cv::Point_<int>)'
..sdk/native/jni/include/opencv2/core/mat.hpp:276: error: undefined reference to 'vtable for cv::_OutputArray'
/Users/mtsindia/Library/Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: the vtable symbol may be undefined because the class is missing its key function
..sdk/native/jni/include/opencv2/core/mat.hpp:276: error: undefined reference to 'vtable for cv::_OutputArray'
..Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: the vtable symbol may be undefined because the class is missing its key function
jni/scan.cpp:261: error: undefined reference to 'vtable for cv::_InputArray'
..Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: the vtable symbol may be undefined because the class is missing its key function
jni/scan.cpp:296: error: undefined reference to 'cv::Exception::Exception(int, std::string const&, std::string const&, std::string const&, int)'
jni/scan.cpp:297: error: undefined reference to 'cv::Exception::Exception(int, std::string const&, std::string const&, std::string const&, int)'
jni/scan.cpp:298: error: undefined reference to 'cv::Exception::Exception(int, std::string const&, std::string const&, std::string const&, int)'
jni/scan.cpp:299: error: undefined reference to 'cv::Exception::Exception(int, std::string const&, std::string const&, std::string const&, int)'

这是link https://github.com/jhansireddy/AndroidScannerDemo我在其中下载了扫描仪应用程序演示并进行了修改scan.cpp文件并尝试重建库。 我已经在 Android studio 中创建了 ndk-build 作为外部工具，也验证了 ndk 路径。我在这里缺少什么？任何帮助，将不胜感激。

修复。我不知道它如何修复的确切原因。我恢复了在 Android.mk 、 Application.mk 和 OpenCV.mk 中所做的所有更改，现在我的 Adnroid.mk 如下所示：

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)
OPENCV_INSTALL_MODULES:=on
include $(LOCAL_PATH)/sdk/native/jni/OpenCV.mk

LOCAL_MODULE    := Scanner
LOCAL_SRC_FILES := scan.cpp
LOCAL_LDLIBS    += -lm -llog -landroid
LOCAL_LDFLAGS += -ljnigraphics
include $(BUILD_SHARED_LIBRARY)

和Application.mk：

APP_STL := stlport_static
APP_CPPFLAGS := -frtti -fexceptions
APP_ABI := all
APP_PLATFORM := android-14

这是我的 OpenCV.mk 的样子：

https://pastebin.com/zuqM6tbu https://pastebin.com/zuqM6tbu

我想我错过了指定正确的路径，或者我的库文件（.so 和 .a）可能与包含的头文件版本不同。如果有人有其他想法，请发表评论。