Hi, all
I am doing the next changes to support c++11 with opencv 3 in android NDK:
I change from APP_STL := gnustl_static to APP_STL := c++_static
Application.mk
APP_STL := c++_static
APP_CPPFLAGS := -std=c++11 -frtti -fexceptions
APP_ABI := armeabi armeabi-v7a mips x86 arm64-v8a x86_64 mips64
APP_PLATFORM := android-14
# use this to select gcc instead of clang
NDK_TOOLCHAIN_VERSION := 4.9
Android.mk
LOCAL_PATH := $(call my-dir)
LOCAL_PATH_LIB_DIR:=library/lib/classifier
include $(CLEAR_VARS)
OPENCV_CAMERA_MODULES:=off
OPENCV_INSTALL_MODULES:=on
OPENCV_LIB_TYPE:=SHARED
include ../../../OpenCV-android-sdk/sdk/native/jni/OpenCV.mk
LOCAL_MODULE:= detection_based_tracker
LOCAL_SRC_FILES := DetectionBasedTracker_jni.cpp \
library/jniUtils.cpp \
${ LOCAL_PATH_LIB_DIR}/logic.cpp \
${ LOCAL_PATH_LIB_DIR}/logic2.cpp \
LOCAL_C_INCLUDES += $(LOCAL_PATH)
LOCAL_LDLIBS += -llog -ldl -lm -latomic -L$(LOCAL_PATH)/libs/armeabi
- L$(LOCAL_PATH)/libs/armeabi-v7a -L$(LOCAL_PATH)/libs/mips
-L$(LOCAL_PATH)/libs/x86 -L$(LOCAL_PATH)/libs/arm64-v8a
-L$(LOCAL_PATH)/libs/mips64
-L$(LOCAL_PATH)/libs/x86_64
LOCAL_CPPFLAGS += -ljnigraphics -D_LINUX -DBOOST_HAS_PTHREADS -fexceptions -std=c++11
-I$(LOCAL_PATH)/ -I$(LOCAL_PATH)/library/lib/pico/ I
LOCAL_CPP_FEATURES := exceptions rtti
APP_OPTIM := debug
include $(BUILD_SHARED_LIBRARY)
When I compile the Android app with Android NDK r10e. I hav the next errores in the Log:
error: undefined reference to
'cv::DescriptorMatcher::match(cv::_InputArray const&, cv::_InputArray const&, std::__1::vector>&, cv::_InputArray const&) const'
undefined reference to 'cv::Subdiv2D::insert(std::__1::vector,std::__1::allocator>> const&)'
error: undefined reference to 'cv::imwrite(cv::String const&, cv::_InputArray const&, std::__1::vector> const&)'
the undefined reference to cv::imwrite method, this method is in the native SDK opencv in the path
"opencv/imgcodecs.hpp"
CV_EXPORTS_W bool imwrite( const String& filename, InputArray img,
const std::vector& params = std::vector());
↧