I am very new to the NDK and have to port a project written in C++ to Android. The project is relying on the boost and opencv libraries.
So I started by creating an Android project and including the necessary NDK stuff. I created an Android.mk file and added the libraries like in the descriptions.
File structure:
- jni
- Android.mk
- Application.mk
- boost
- include
- lib
- boost.mk
- libboost_date_time-gcc-mt-1_53.a
- ...
- opencv
- ...
Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
include ./jni/opencv/sdk/native/jni/OpenCV.mk
LOCAL_MODULE := wahet
LOCAL_SRC_FILES := wahet.cpp
LOCAL_CFLAGS += -I./jni/boost/include/boost-1_53
LOCAL_LDLIBS += -L./jni/boost/lib/ -libboost_system-gcc-mt-1_53.a -libboost_regex-gcc-mt-1_53.a -libboost_filesystem-gcc-mt-1_53.a -libboost_date_time-gcc-mt-1_53.a \
-L$(NDK_ROOT)/sources/cxx-stl/gnu-libstdc++/libs/armeabi \
-lgnustl_static
include $(BUILD_SHARED_LIBRARY)
I am using Android NDK r8e boost 1_53 and opencv2.
So I tried to fix this and followed this guide, what resulted in errors as well.
This is my file where I include the libraries:
wahet.cpp
#include <cstdio>
#include <map>
#include <vector>
#include <string>
#include <cstring>
#include <ctime>
#include <opencv2/core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/photo/photo.hpp>
#include <boost/regex.hpp>
#include <boost/filesystem.hpp>
#include <boost/date_time/posix_time/posix_time_types.hpp>
using namespace std;
using namespace cv;
And I get the following error:
/home/tassilo/android-ndks/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: warning: hidden symbol '__aeabi_atexit' in /home/tassilo/android-ndks/android-ndk-r8e/sources/cxx-stl/gnu-libstdc++/4.6/libs/armeabi-v7a/libgnustl_static.a(atexit_arm.o) is referenced by DSO jni/opencv/sdk/native/jni/../libs/armeabi-v7a/libopencv_java.so
/home/tassilo/android-ndks/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: error: cannot find -libboost_system-gcc-mt-1_53.a
/home/tassilo/android-ndks/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: error: cannot find -libboost_regex-gcc-mt-1_53.a
/home/tassilo/android-ndks/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: error: cannot find -libboost_filesystem-gcc-mt-1_53.a
/home/tassilo/android-ndks/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: error: cannot find -libboost_date_time-gcc-mt-1_53.a
/home/tassilo/android-ndks/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: error: cannot find -lgnustl_static
I already tried a lot and I always have the problem that there is one library working and the other one is'nt. it seems there is some kind of confilct. Maybe in my make files?
I am getting really desperated of working for days on this and appreciate any help.
