make 编译时报错

[xiaoyang151]

[ 87%] Built target ncnn
[ 88%] Linking CXX executable mobilenetssd
[ 89%] Linking CXX executable yolov2
[ 90%] Linking CXX executable fasterrcnn
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_core.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_highgui.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_imgproc.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_imgcodecs.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_imgcodecs.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_imgproc.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_core.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_core.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_highgui.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_imgproc.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_imgcodecs.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_imgcodecs.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_imgproc.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_core.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_core.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_highgui.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_imgproc.so.3.2.0: incompatible target[ 91%] Linking CXX executable mobilenetv2ssdlite

/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_imgcodecs.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_imgcodecs.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_imgproc.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_core.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_core.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_highgui.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_imgproc.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_imgcodecs.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_imgcodecs.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_imgproc.so.3.2.0: incompatible target
/home/duziyang/android-ndk-r17b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /home/duziyang/opencv-3.2.0/build/lib/libopencv_core.so.3.2.0: incompatible target
CMakeFiles/mobilenetssd.dir/mobilenetssd.cpp.o:mobilenetssd.cpp:function main: error: undefined reference to 'cv::String::allocate(unsigned int)'
CMakeFiles/mobilenetssd.dir/mobilenetssd.cpp.o:mobilenetssd.cpp:function main: error: undefined reference to 'cv::imread(cv::String const&, int)'
CMakeFiles/mobilenetssd.dir/mobilenetssd.cpp.o:mobilenetssd.cpp:function main: error: undefined reference to 'cv::String::deallocate()'
CMakeFiles/mobilenetssd.dir/mobilenetssd.cpp.o:mobilenetssd.cpp:function main: error: undefined reference to 'cv::Mat::copyTo(cv::OutputArray const&) const'
CMakeFiles/mobilenetssd.dir/mobilenetssd.cpp.o:mobilenetssd.cpp:function main: error: undefined reference to 'cv::rectangle(cv::Mat&, cv::Rect, cv::Scalar_ const&, int, int, int)'
CMakeFiles/mobilenetssd.dir/mobilenetssd.cpp.o:mobilenetssd.cpp:function main: error: undefined reference to 'cv::String::allocate(unsigned int)'
CMakeFiles/mobilenetssd.dir/mobilenetssd.cpp.o:mobilenetssd.cpp:function main: error: undefined reference to 'cv::getTextSize(cv::String const&, int, double, int, int*)'
CMakeFiles/mobilenetssd.dir/mobilenetssd.cpp.o:mobilenetssd.cpp:function main: error: undefined reference to 'cv::String::deallocate()'
CMakeFiles/mobilenetssd.dir/mobilenetssd.cpp.o:mobilenetssd.cpp:function main: error: undefined reference to 'cv::rectangle(cv::Mat&, cv::Rect_, cv::Scalar_ const&, int, int, int)'
CMakeFiles/mobilenetssd.dir/mobilenetssd.cpp.o:mobilenetssd.cpp:function main: error: undefined reference to 'cv::String::allocate(unsigned int)'
CMakeFiles/mobilenetssd.dir/mobilenetssd.cpp.o:mobilenetssd.cpp:function main: error: undefined reference to 'cv::putText(cv::InputOutputArray const&, cv::String const&, cv::Point, int, double, cv::Scalar_, int, int, bool)'
CMakeFiles/mobilenetssd.dir/mobilenetssd.cpp.o:mobilenetssd.cpp:function main: error: undefined reference to 'cv::String::deallocate()'
CMakeFiles/mobilenetssd.dir/mobilenetssd.cpp.o:mobilenetssd.cpp:function main: error: undefined reference to 'cv::String::allocate(unsigned int)'
CMakeFiles/mobilenetssd.dir/mobilenetssd.cpp.o:mobilenetssd.cpp:function main: error: undefined reference to 'cv::imshow(cv::String const&, cv::InputArray const&)'
CMakeFiles/mobilenetssd.dir/mobilenetssd.cpp.o:mobilenetssd.cpp:function main: error: undefined reference to 'cv::String::deallocate()'
CMakeFiles/mobilenetssd.dir/mobilenetssd.cpp.o:mobilenetssd.cpp:function main: error: undefined reference to 'cv::waitKey(int)'
CMakeFiles/mobilenetssd.dir/mobilenetssd.cpp.o:mobilenetssd.cpp:function main: error: undefined reference to 'cv::Mat::deallocate()'
CMakeFiles/mobilenetssd.dir/mobilenetssd.cpp.o:mobilenetssd.cpp:function main: error: undefined reference to 'cv::fastFree(void*)'
CMakeFiles/mobilenetssd.dir/mobilenetssd.cpp.o:mobilenetssd.cpp:function main: error: undefined reference to 'cv::Mat::deallocate()'
CMakeFiles/mobilenetssd.dir/mobilenetssd.cpp.o:mobilenetssd.cpp:function main: error: undefined reference to 'cv::fastFree(void*)'
CMakeFiles/yolov2.dir/yolov2.cpp.o:yolov2.cpp:function main: error: undefined reference to 'cv::String::allocate(unsigned int)'
CMakeFiles/yolov2.dir/yolov2.cpp.o:yolov2.cpp:function main: error: undefined reference to 'cv::imread(cv::String const&, int)'
CMakeFiles/yolov2.dir/yolov2.cpp.o:yolov2.cpp:function main: error: undefined reference to 'cv::String::deallocate()'
CMakeFiles/yolov2.dir/yolov2.cpp.o:yolov2.cpp:function main: error: undefined reference to 'cv::Mat::copyTo(cv::OutputArray const&) const'
CMakeFiles/yolov2.dir/yolov2.cpp.o:yolov2.cpp:function main: error: undefined reference to 'cv::rectangle(cv::Mat&, cv::Rect, cv::Scalar const&, int, int, int)'
CMakeFiles/yolov2.dir/yolov2.cpp.o:yolov2.cpp:function main: error: undefined reference to 'cv::String::allocate(unsigned int)'
CMakeFiles/yolov2.dir/yolov2.cpp.o:yolov2.cpp:function main: error: undefined reference to 'cv::getTextSize(cv::String const&, int, double, int, int*)'
CMakeFiles/yolov2.dir/yolov2.cpp.o:yolov2.cpp:function main: error: undefined reference to 'cv::String::deallocate()'
CMakeFiles/yolov2.dir/yolov2.cpp.o:yolov2.cpp:function main: error: undefined reference to 'cv::rectangle(cv::Mat&, cv::Rect_, cv::Scalar_ const&, int, int, int)'
CMakeFiles/yolov2.dir/yolov2.cpp.o:yolov2.cpp:function main: error: undefined reference to 'cv::String::allocate(unsigned int)'
CMakeFiles/yolov2.dir/yolov2.cpp.o:yolov2.cpp:function main: error: undefined reference to 'cv::putText(cv::InputOutputArray const&, cv::String const&, cv::Point, int, double, cv::Scalar_, int, int, bool)'
CMakeFiles/yolov2.dir/yolov2.cpp.o:yolov2.cpp:function main: error: undefined reference to 'cv::String::deallocate()'
CMakeFiles/yolov2.dir/yolov2.cpp.o:yolov2.cpp:function main: error: undefined reference to 'cv::String::allocate(unsigned int)'
CMakeFiles/yolov2.dir/yolov2.cpp.o:yolov2.cpp:function main: error: undefined reference to 'cv::imshow(cv::String const&, cv::InputArray const&)'
CMakeFiles/yolov2.dir/yolov2.cpp.o:yolov2.cpp:function main: error: undefined reference to 'cv::String::deallocate()'
CMakeFiles/yolov2.dir/yolov2.cpp.o:yolov2.cpp:function main: error: undefined reference to 'cv::waitKey(int)'
CMakeFiles/yolov2.dir/yolov2.cpp.o:yolov2.cpp:function main: error: undefined reference to 'cv::Mat::deallocate()'
CMakeFiles/yolov2.dir/yolov2.cpp.o:yolov2.cpp:function main: error: undefined reference to 'cv::fastFree(void*)'
CMakeFiles/yolov2.dir/yolov2.cpp.o:yolov2.cpp:function main: error: undefined reference to 'cv::Mat::deallocate()'
CMakeFiles/yolov2.dir/yolov2.cpp.o:yolov2.cpp:function main: error: undefined reference to 'cv::fastFree(void*)'
CMakeFiles/fasterrcnn.dir/fasterrcnn.cpp.o:fasterrcnn.cpp:function main: error: undefined reference to 'cv::String::allocate(unsigned int)'
CMakeFiles/fasterrcnn.dir/fasterrcnn.cpp.o:fasterrcnn.cpp:function main: error: undefined reference to 'cv::imread(cv::String const&, int)'
CMakeFiles/fasterrcnn.dir/fasterrcnn.cpp.o:fasterrcnn.cpp:function main: error: undefined reference to 'cv::String::deallocate()'
CMakeFiles/fasterrcnn.dir/fasterrcnn.cpp.o:fasterrcnn.cpp:function main: error: undefined reference to 'cv::Mat::copyTo(cv::OutputArray const&) const'
CMakeFiles/fasterrcnn.dir/fasterrcnn.cpp.o:fasterrcnn.cpp:function main: error: undefined reference to 'cv::rectangle(cv::Mat&, cv::Rect, cv::Scalar const&, int, int, int)'
CMakeFiles/fasterrcnn.dir/fasterrcnn.cpp.o:fasterrcnn.cpp:function main: error: undefined reference to 'cv::String::allocate(unsigned int)'
CMakeFiles/fasterrcnn.dir/fasterrcnn.cpp.o:fasterrcnn.cpp:function main: error: undefined reference to 'cv::getTextSize(cv::String const&, int, double, int, int*)'
CMakeFiles/fasterrcnn.dir/fasterrcnn.cpp.o:fasterrcnn.cpp:function main: error: undefined reference to 'cv::String::deallocate()'
CMakeFiles/fasterrcnn.dir/fasterrcnn.cpp.o:fasterrcnn.cpp:function main: error: undefined reference to 'cv::rectangle(cv::Mat&, cv::Rect_, cv::Scalar_ const&, int, int, int)'
CMakeFiles/fasterrcnn.dir/fasterrcnn.cpp.o:fasterrcnn.cpp:function main: error: undefined reference to 'cv::String::allocate(unsigned int)'
CMakeFiles/fasterrcnn.dir/fasterrcnn.cpp.o:fasterrcnn.cpp:function main: error: undefined reference to 'cv::putText(cv::InputOutputArray const&, cv::String const&, cv::Point, int, double, cv::Scalar_, int, int, bool)'
CMakeFiles/fasterrcnn.dir/fasterrcnn.cpp.o:fasterrcnn.cpp:function main: error: undefined reference to 'cv::String::deallocate()'
CMakeFiles/fasterrcnn.dir/fasterrcnn.cpp.o:fasterrcnn.cpp:function main: error: undefined reference to 'cv::String::allocate(unsigned int)'
CMakeFiles/fasterrcnn.dir/fasterrcnn.cpp.o:fasterrcnn.cpp:function main: error: undefined reference to 'cv::imshow(cv::String const&, cv::InputArray const&)'
CMakeFiles/fasterrcnn.dir/fasterrcnn.cpp.o:fasterrcnn.cpp:function main: error: undefined reference to 'cv::String::deallocate()'
CMakeFiles/fasterrcnn.dir/fasterrcnn.cpp.o:fasterrcnn.cpp:function main: error: undefined reference to 'cv::waitKey(int)'
CMakeFiles/fasterrcnn.dir/fasterrcnn.cpp.o:fasterrcnn.cpp:function main: error: undefined reference to 'cv::Mat::deallocate()'
CMakeFiles/fasterrcnn.dir/fasterrcnn.cpp.o:fasterrcnn.cpp:function main: error: undefined reference to 'cv::fastFree(void*)'
CMakeFiles/fasterrcnn.dir/fasterrcnn.cpp.o:fasterrcnn.cpp:function main: error: undefined reference to 'cv::Mat::deallocate()'
CMakeFiles/fasterrcnn.dir/fasterrcnn.cpp.o:fasterrcnn.cpp:function main: error: undefined reference to 'cv::fastFree(void*)'
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
examples/CMakeFiles/yolov2.dir/build.make:102: recipe for target 'examples/yolov2' failed
make[2]: *** [examples/yolov2] Error 1
CMakeFiles/Makefile2:132: recipe for target 'examples/CMakeFiles/yolov2.dir/all' failed
make[1]: *** [examples/CMakeFiles/yolov2.dir/all] Error 2
make[1]: *** 正在等待未完成的任务....
examples/CMakeFiles/mobilenetssd.dir/build.make:102: recipe for target 'examples/mobilenetssd' failed
make[2]: *** [examples/mobilenetssd] Error 1
CMakeFiles/Makefile2:169: recipe for target 'examples/CMakeFiles/mobilenetssd.dir/all' failed
make[1]: *** [examples/CMakeFiles/mobilenetssd.dir/all] Error 2
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
examples/CMakeFiles/fasterrcnn.dir/build.make:102: recipe for target 'examples/fasterrcnn' failed
make[2]: *** [examples/fasterrcnn] Error 1
CMakeFiles/Makefile2:206: recipe for target 'examples/CMakeFiles/fasterrcnn.dir/all' failed
make[1]: *** [examples/CMakeFiles/fasterrcnn.dir/all] Error 2
CMakeFiles/mobilenetv2ssdlite.dir/mobilenetv2ssdlite.cpp.o:mobilenetv2ssdlite.cpp:function main: error: undefined reference to 'cv::String::allocate(unsigned int)'
CMakeFiles/mobilenetv2ssdlite.dir/mobilenetv2ssdlite.cpp.o:mobilenetv2ssdlite.cpp:function main: error: undefined reference to 'cv::imread(cv::String const&, int)'
CMakeFiles/mobilenetv2ssdlite.dir/mobilenetv2ssdlite.cpp.o:mobilenetv2ssdlite.cpp:function main: error: undefined reference to 'cv::String::deallocate()'
CMakeFiles/mobilenetv2ssdlite.dir/mobilenetv2ssdlite.cpp.o:mobilenetv2ssdlite.cpp:function main: error: undefined reference to 'cv::Mat::copyTo(cv::OutputArray const&) const'
CMakeFiles/mobilenetv2ssdlite.dir/mobilenetv2ssdlite.cpp.o:mobilenetv2ssdlite.cpp:function main: error: undefined reference to 'cv::rectangle(cv::Mat&, cv::Rect, cv::Scalar const&, int, int, int)'
CMakeFiles/mobilenetv2ssdlite.dir/mobilenetv2ssdlite.cpp.o:mobilenetv2ssdlite.cpp:function main: error: undefined reference to 'cv::String::allocate(unsigned int)'
CMakeFiles/mobilenetv2ssdlite.dir/mobilenetv2ssdlite.cpp.o:mobilenetv2ssdlite.cpp:function main: error: undefined reference to 'cv::getTextSize(cv::String const&, int, double, int, int*)'
CMakeFiles/mobilenetv2ssdlite.dir/mobilenetv2ssdlite.cpp.o:mobilenetv2ssdlite.cpp:function main: error: undefined reference to 'cv::String::deallocate()'
CMakeFiles/mobilenetv2ssdlite.dir/mobilenetv2ssdlite.cpp.o:mobilenetv2ssdlite.cpp:function main: error: undefined reference to 'cv::rectangle(cv::Mat&, cv::Rect_, cv::Scalar_ const&, int, int, int)'
CMakeFiles/mobilenetv2ssdlite.dir/mobilenetv2ssdlite.cpp.o:mobilenetv2ssdlite.cpp:function main: error: undefined reference to 'cv::String::allocate(unsigned int)'
CMakeFiles/mobilenetv2ssdlite.dir/mobilenetv2ssdlite.cpp.o:mobilenetv2ssdlite.cpp:function main: error: undefined reference to 'cv::putText(cv::InputOutputArray const&, cv::String const&, cv::Point, int, double, cv::Scalar_, int, int, bool)'
CMakeFiles/mobilenetv2ssdlite.dir/mobilenetv2ssdlite.cpp.o:mobilenetv2ssdlite.cpp:function main: error: undefined reference to 'cv::String::deallocate()'
CMakeFiles/mobilenetv2ssdlite.dir/mobilenetv2ssdlite.cpp.o:mobilenetv2ssdlite.cpp:function main: error: undefined reference to 'cv::String::allocate(unsigned int)'
CMakeFiles/mobilenetv2ssdlite.dir/mobilenetv2ssdlite.cpp.o:mobilenetv2ssdlite.cpp:function main: error: undefined reference to 'cv::imshow(cv::String const&, cv::_InputArray const&)'
CMakeFiles/mobilenetv2ssdlite.dir/mobilenetv2ssdlite.cpp.o:mobilenetv2ssdlite.cpp:function main: error: undefined reference to 'cv::String::deallocate()'
CMakeFiles/mobilenetv2ssdlite.dir/mobilenetv2ssdlite.cpp.o:mobilenetv2ssdlite.cpp:function main: error: undefined reference to 'cv::waitKey(int)'
CMakeFiles/mobilenetv2ssdlite.dir/mobilenetv2ssdlite.cpp.o:mobilenetv2ssdlite.cpp:function main: error: undefined reference to 'cv::Mat::deallocate()'
CMakeFiles/mobilenetv2ssdlite.dir/mobilenetv2ssdlite.cpp.o:mobilenetv2ssdlite.cpp:function main: error: undefined reference to 'cv::fastFree(void*)'
CMakeFiles/mobilenetv2ssdlite.dir/mobilenetv2ssdlite.cpp.o:mobilenetv2ssdlite.cpp:function main: error: undefined reference to 'cv::Mat::deallocate()'
CMakeFiles/mobilenetv2ssdlite.dir/mobilenetv2ssdlite.cpp.o:mobilenetv2ssdlite.cpp:function main: error: undefined reference to 'cv::fastFree(void*)'
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
examples/CMakeFiles/mobilenetv2ssdlite.dir/build.make:102: recipe for target 'examples/mobilenetv2ssdlite' failed
make[2]: *** [examples/mobilenetv2ssdlite] Error 1
CMakeFiles/Makefile2:95: recipe for target 'examples/CMakeFiles/mobilenetv2ssdlite.dir/all' failed
make[1]: *** [examples/CMakeFiles/mobilenetv2ssdlite.dir/all] Error 2
Makefile:129: recipe for target 'all' failed
make: *** [all] Error 2

[nihui]

do not build example dir for android.
android编译的时候不要编译 example 文件夹
https://github.com/Tencent/ncnn/wiki/how-to-build