I'm trying to build a native C++ library for the Android app. This lib uses Tensorflow C++ API (version 1.9.0 and 1.10.0) and OpenCV(3.3.0) inside. For generating wrapper I'm using Swig. I'm using Android NDK to build *.so files (I've tried with different versions of the NDK versions 10, 14, 15, 17). I've built *.a (libtensorflow-core.a, nsync.a, libprotobuf.a)files from sources.
defaultConfig {
minSdkVersion 21
targetSdkVersion 28
}
I have the next files: Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := libnsync
LOCAL_SRC_FILES := $(PATH_TO_TENSORFLOW)/tensorflow/contrib/makefile/downloads/nsync/builds/armeabi-v7a.android.c++11/nsync.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := libprotobuf
LOCAL_SRC_FILES := $(PATH_TO_TENSORFLOW)/tensorflow/contrib/makefile/gen/protobuf_android/armeabi-v7a/lib/libprotobuf.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := libtensorflow
LOCAL_SRC_FILES := $(PATH_TO_TENSORFLOW)/tensorflow/contrib/makefile/gen/lib/android_armeabi-v7a/libtensorflow-core.a
LOCAL_EXPORT_C_INCLUDES := \
$(PATH_TO_TENSORFLOW) \
$(PATH_TO_TENSORFLOW)/tensorflow/contrib/makefile/gen/host_obj \
$(PATH_TO_TENSORFLOW)/tensorflow/contrib/makefile/downloads/eigen \
$(PATH_TO_TENSORFLOW)/tensorflow/contrib/makefile/gen/protobuf_android/armeabi-v7a/include \
$(PATH_TO_TENSORFLOW)/tensorflow/core/public \
$(PATH_TO_TENSORFLOW)/tensorflow/contrib/makefile/downloads/nsync/public
LOCAL_STATIC_LIBRARIES += libprotobuf libnsync
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_ARM_NEON := true
OPENCV_CAMERA_MODULES := off
include $(OPENCV_PACKAGE_DIR)/native/jni/OpenCV.mk
LOCAL_MODULE := libOcr
LOCAL_SRC_FILES := ocr/Ocr_wrap.cxx
LOCAL_LDLIBS += -landroid -llog -ldl
LOCAL_CPPFLAGS += -std=c++11
LOCAL_STATIC_LIBRARIES += libprotobuf libtensorflow
include $(BUILD_SHARED_LIBRARY)
Application.mk
APP_STL := gnustl_shared
APP_CPPFLAGS := -frtti -fexceptions
APP_ABI := armeabi-v7a
APP_PLATFORM := android-21 #updated from 19 to 21
APP_OPTIM := release
LOCAL_ARM_NEON := true
During the build, I've faced a lot of errors, and the last one is:
[armeabi-v7a] SharedLibrary : libOcr.so
[armeabi-v7a] Install : liblept.so => libs/armeabi-v7a/liblept.so
[armeabi-v7a] Install : libtess.so => libs/armeabi-v7a/libtess.so
[armeabi-v7a] Install : libgnustl_shared.so => libs/armeabi-v7a/libgnustl_shared.so
/Users/tensorflow/tensorflow/contrib/makefile/gen/lib/android_armeabi-v7a/libtensorflow-core.a(str_util.o):str_util.cc:function tensorflow::str_util::CUnescape(tensorflow::StringPiece, std::string*, std::string*): error: undefined reference to 'std::__throw_out_of_range_fmt(char const*, ...)'
/Users/tensorflow/tensorflow/contrib/makefile/gen/lib/android_armeabi-v7a/libtensorflow-core.a(log_memory.o):log_memory.cc:function tensorflow::LogMemory::RecordStep(long long, std::string const&): error: undefined reference to 'std::__throw_out_of_range_fmt(char const*, ...)'
/Users/tensorflow/tensorflow/contrib/makefile/gen/lib/android_armeabi-v7a/libtensorflow-core.a(log_memory.o):log_memory.cc:function tensorflow::LogMemory::RecordTensorAllocation(std::string const&, long long, tensorflow::Tensor const&): error: undefined reference to 'std::__throw_out_of_range_fmt(char const*, ...)'
/Users/tensorflow/tensorflow/contrib/makefile/gen/lib/android_armeabi-v7a/libtensorflow-core.a(log_memory.o):log_memory.cc:function tensorflow::LogMemory::RecordTensorDeallocation(long long, std::string const&): error: undefined reference to 'std::__throw_out_of_range_fmt(char const*, ...)'
collect2: error: ld returned 1 exit status
make: *** [/Users/app/app/src/main/obj/local/armeabi-v7a/libOcr.so] Error 1
make: Leaving directory `/Users/app/app/src/main/jni'
:sdk:buildNative FAILED
FAILURE: Build failed with an exception.
For building *.so files I use next task in build.gradle file:
commandLine "$ndkDir/ndk-build",
'-C', file('src/main/jni').absolutePath,
'-j', Runtime.runtime.availableProcessors(),
'all',
'NDK_LOG=1'
Dear community, please help me to figure out these issues. Thank you.
Updated: APP_PLATFORM changed to android-21, better results but still have errors
