I'm trying to integrate duktape with android jni. My jni's android.mk is pretty standard:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := mynativelib
LOCAL_SRC_FILES := mynativelib.cpp ductape.c
include $(BUILD_SHARED_LIBRARY)
When I try ty compile my native project I get this error:
In file included from jni/duktape.h:174:0,
from jni/mynativelib.cpp:3:
jni/duk_config.h:840:43: fatal error: exception: No such file or directory
#include <exception> /* std::exception */
Error is referring to these lines in duk_config.h
#if defined(DUK_F_CPP)
#include <exception> /* std::exception */
#endif
So should I use configure.py with some specific flags or fix android.mk...?
Seems like writing a question helps brain to come up with an answer. As a background I'm investigating usage of same script in several platforms and I noticed that exception.h is included in windows platform and therefore I believe it is good to keep similar approach on android also. I added these flags to application.mk and it seems to work.
APP_STL := gnustl_static
APP_CPPFLAGS := -fexceptions
Related
I am getting a compile error:
undefined reference to 'TangoService_getConfig' (MoreTeapotsNativeActivity.cpp)
ld returned 1 exit status (collect2.exe)
I am working with the tango sdk TangoSDK_Ikariotikos_C.zip in Visual Studio 2015 using VisualGDB. I have also replicated the error in Android Studio so it isn't IDE specific.
I have started with an NDK sample project to test a native activity deploys correctly and reduce complexity whilst troubleshooting. I have used VisualGDB MoreTeaPotsNativeActivity but any will do. The app compiles and runs on our ASUS Zenfone AR. Once I include tango_client_api.h and add the following code, I get the compile error:
TangoCoordinateFramePair* Tango_FramePair;
Tango_FramePair = new TangoCoordinateFramePair();
Tango_FramePair->base = TANGO_COORDINATE_FRAME_START_OF_SERVICE;
Tango_FramePair->target = TANGO_COORDINATE_FRAME_DEVICE;
TangoErrorType retval;
// Connect to tango service.
TangoConfig tango_config;
tango_config = TangoService_getConfig(TANGO_CONFIG_DEFAULT);
The Tango header file has an extern "C" wrapper for the C functions and the .o shows them demangled so I can't see why it is failing.
If I comment out...
//tango_config = TangoService_getConfig(TANGO_CONFIG_DEFAULT);
...it compiles and the enums show as locals in the debug so it seems to be a problem with functions: see image of locals here
I may be missing something glaringly obvious because android is fairly new to me. Perhaps someone can test the tangoSDK library with the same code block and spot the issue. It is frustrating that I cannot even link a library. I may be missing something simple but to me it is not obvious.
Any help will be greatly appreciated.
I contacted Sysprogs Support who gave me a link:
PREBUILT_SHARED_LIBRARY syntax
I hadn't realised the library wasn't being copied even though intellisense was reading the header. I needed to include a reference in the make file (android.mk) to copy the library (I copied Tango include and lib folders to the project jni folder):
include $(CLEAR_VARS)
LOCAL_MODULE := tango_client_api
LOCAL_SRC_FILES := ../jni/lib/$(TARGET_ARCH_ABI)/libtango_client_api.so
include $(PREBUILT_SHARED_LIBRARY)
I did the same with an additional block for the support library:
include $(CLEAR_VARS)
LOCAL_MODULE := tango_support_api
LOCAL_SRC_FILES := ../jni/lib/$(TARGET_ARCH_ABI)/libtango_support_api.so
include $(PREBUILT_SHARED_LIBRARY)
The main module just needs this:
LOCAL_SHARED_LIBRARIES := tango_client_api
The whole file looks like this:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := tango_client_api
LOCAL_SRC_FILES := ../jni/lib/$(TARGET_ARCH_ABI)/libtango_client_api.so
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := tango_support_api
LOCAL_SRC_FILES := ../jni/lib/$(TARGET_ARCH_ABI)/libtango_support_api.so
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := MoreTeapotsNativeActivity
#VisualGDBAndroid: AutoUpdateSourcesInNextLine
LOCAL_SRC_FILES := gdbserver_launcher.c MoreTeapotsNativeActivity.cpp MoreTeapotsRenderer.cpp
LOCAL_C_INCLUDES := jni/include
LOCAL_LDLIBS := -llog -landroid -lEGL -lGLESv2
LOCAL_STATIC_LIBRARIES := cpufeatures android_native_app_glue ndk_helper
LOCAL_SHARED_LIBRARIES := tango_client_api
include $(BUILD_SHARED_LIBRARY)
$(call import-module,android/ndk_helper)
$(call import-module,android/native_app_glue)
$(call import-module,android/cpufeatures)
I didn't get this to work straight away when following the NDK examples but Sysprogs gave me feedback on my mistake which I will include.
I tried to include:
LOCAL_MODULE_FILENAME := tango_client_api
I left off the lib and .so as seemed to be convention. The .so was not necessary but taking lib off was changing the file name which caused a link error. That said, that line was unnecessary in the first place to I removed it. Then it removed the error relating to this. I have yet to see if the library works at runtime because I now get this error:
java.lang.UnsatisfiedLinkError: Unable to load native library "/data/app/com.sample.moreteapots-2/lib/arm64/libMoreTeapotsNativeActivity.so": dlopen failed: library "libbinder.so" not found
But this seems to relate to a problem with Android 7.0 platform 24 and higher where
the system prevents apps from dynamically linking against non-NDK libraries
from /Android/android-sdk/docs/about/versions/nougat/android-7.0-changes.html
I am unable to use .c files in my NDK projects within eclipse 3.8. Consider the following code:
#include <jni.h>
JNIEXPORT void JNICALL Java_com_atd_ndkdemo_NDKDemo_charManip(JNIEnv* env, jobject obj, jcharArray chrs)
jchar* cchar0 = GetCharArrayElements(chrs, 0);
jchar* cchar1 = (*env)->GetCharArrayElements(env, chrs, 0);
}
Here is my Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := NDKDemo
LOCAL_SRC_FILES := NDKDemo.c
include $(BUILD_SHARED_LIBRARY)
cchar0 doesn't complain until I compile, then I get a method undefined
cchar1 complains before I compile, but is able to compile (if i omit cchar0). I get a method undefined or not part of struct or something similar.
This has me baffled. I have completely reinstalled eclipse/jni/ndk plugin and still same issue. There is a little bug icon next to cchar1 on the left where I set breakpoints if that helps. Also, I have not modified jni.h or any other files. It is important that I leave my file as .c.
edit
Method 'GetCharArrayElements' could not be resolved
Screenshot: http://i.imgur.com/SMacpqy.png
Screenshot to build success: http://i.imgur.com/rcs9Qv7.png
I am trying to write an JNI file and it includes JNIHelp.h, however I met some error:
jni/JNIMPEG4Writer.cpp:4:21: fatal error: JNIHelp.h: No such file or directory
compilation terminated.
I guess I should add something to the Android.mk file, but I am not sure what should I add. This is my Android.mk file:
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := JNIMPEG4Writer
LOCAL_STATIC_LIBRARIES := MPEG4Writer
#LOCAL_LDLIBS := -llog
LOCAL_LDLIBS += -L$(SYSROOT)/usr/lib –llog
LOCAL_SRC_FILES := JNIMPEG4Writer.cpp
include $(BUILD_SHARED_LIBRARY)
Does anyone have any ideas? Thanks!
JNIHelp.h is not part of NDK. You inherited some code from the Android platform. You will find other dependencies on non-public modules, most likely libcutils and libutils.
You have three options: build your code as a module of the platform, rewrite the code to only use public headers and libraries, or download parts of the platform, e.g. https://android.googlesource.com/platform/libnativehelper/, and arrange the include paths accordingly.
To satisfy the linker in the latter scenario, you can use adb pull /system/lib to acquire the versions of libnativehelper.so, libcutils.so, and other referenced non-public libraries. Note that ndk-build will complain about linking against these libraries.
While trying to execute a program based on C++ in android via NDK platform, the compilation is giving error that 'iostream' and 'vector' header files are not found, as I have included both of them in my C++ code.
M using android-ndk-r5b and compiling it with Cygwin.
I have seen most of the header files (even iostream & vector) in the folder **root\android-ndk-r5b\sources\cxx-stl\gnu-libstdc++\include\** but dont know why its still showing the error.
I have to fetch some header files(*.h) and some cpp files also for my program, also guide me where to place the header files & how to mention them in make file.
My android make file is:
**ANDROID.MK**
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := NDK1
FILE_LIST := $(wildcard $(LOCAL_PATH)/*.cpp)
LOCAL_SRC_FILES := $(FILE_LIST:$(LOCAL_PATH)/%=%)
APP_STL := gnustl_static
APP_STL := stlport_static
include $(BUILD_SHARED_LIBRARY)
I have searched but still dont found the command how to specify the header files in this android.mk !
Thanks in advance.
APP_STL directive need to go into Application.mk file.
Please read the documentation more carefully (in docs/CPLUSPLUS-SUPPORT.html file):
You can however select a different implementation by setting the variable APP_STL to something else in your Application.mk, for example:
APP_STL := stlport_static
I'm working on some code cuz I was asked to devlep c++ code about core part of a program.
But, it's my first time to use ndk so, I had some troubles and resolved that.
However, too difficult problem is coming to me. I had building my c++ code w/ ndk but,
it said,
.h:3:20: error: string: No such file or directory
.h:5: error: 'std::string' has not been declared
and any other errors about that.
Below is my 'Android.mk' file I wrote:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := clibs
LOCAL_SRC_FILES := sqlite3.c
LOCAL_LDLIBS := -llog
include $(BUILD_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_DEFAULT_CPP_EXTENSION := cpp
LOCAL_MODULE := mytweetlib
LOCAL_STATIC_LIBRARIES := clibs
LOCAL_SRC_FILES := Friend.cpp SQLiteDB.cpp Cursor.cpp DB4Friends.cpp ResultParser.cpp MyTweet.cpp Stub.cpp
include $(BUILD_SHARED_LIBRARY)
I tried to link the .c file(sqlite3.c) Making static library file w/ the other file(to be built to shared library).
Is there anyone knows about this? Even if it's just very little clue, plz give me that.
(I haven't been resolving this problem)
It looks like the NDK isn't being told to use stl port.
Try adding an Application.mk file containing APP_STL. This adds the stlport headers to the include path, and links against the libraries.
APP_STL := stlport_static
I would like to add further to Piklor answer.
Do not confuse with "Android.mk" file with "Application.mk" , in your jni folder.
Also your include should include string not string.h