I am using open-ssl source given at https://github.com/eighthave/openssl-android
to build a library which can be used in android project.
As per instructions given at README.txt, I am able to compile it for the the Android platform version 2.2 (level -8)
But my app requires it to be 2.1 (level -7) compatible.
I tried following options with the default.properties file ( https://github.com/eighthave/openssl-android/blob/master/default.properties )
1) set target=android-7
2) set target=android-5
But when I compile it using command ndk-build, it gives following error
Compile thumb : crypto <= dsa_vrf.c
Compile thumb : crypto <= dso_dl.c
Compile thumb : crypto <= dso_dlfcn.c
/Crypto/openssl-android/crypto/dso/dso_dlfcn.c: In function 'dlfcn_pathbyaddr':
/Crypto/openssl-android/crypto/dso/dso_dlfcn.c:445: error: 'Dl_info' undeclared (first use in this function)
/Crypto/openssl-android/crypto/dso/dso_dlfcn.c:445: error: (Each undeclared identifier is reported only once
/Crypto/openssl-android/crypto/dso/dso_dlfcn.c:445: error: for each function it appears in.)
/Crypto/openssl-android/crypto/dso/dso_dlfcn.c:445: error: expected ';' before 'dli'
/Crypto/openssl-android/crypto/dso/dso_dlfcn.c:455: error: 'dli' undeclared (first use in this function)
make: *** [obj/local/armeabi/objs/crypto/dso/dso_dlfcn.o] Error 1
As per error message- Dl_info is not defined. but if we go to file dso_dlfcn.c , the definition for the structure is already provided. (https://github.com/eighthave/openssl-android/blob/master/crypto/dso/dso_dlfcn.c)
And this code compiled for target=android-8 in default properties file, but not for android-7 or android-5.
Request you to help me to resolve this error. and let me know what all changes needs to be done in order to compile it for android 2.1 platform.
Thanks in advance.
Try to include the following piece of code into dso_dlfcn.c:
typedef struct {
const char *dli_fname; /* Pathname of shared object that
contains address */
void *dli_fbase; /* Address at which shared object
is loaded */
const char *dli_sname; /* Name of nearest symbol with address
lower than addr */
void *dli_saddr; /* Exact address of symbol named
in dli_sname */
} Dl_info;
int dladdr(const void *addr, Dl_info *info) { return 0; }
Before:
#ifdef __linux
# ifndef _GNU_SOURCE
# define _GNU_SOURCE /* make sure dladdr is declared */
# endif
#endif
After that in my case the library is built.
Try to install with latest NDK version and update Application.mk file appropriately.
LOCAL_PATH := $(call my-dir)
APP_PLATFORM := android-19
NDK_TOOLCHAIN_VERSION := clang
APP_ABI := armeabi-v7a
APP_STL := gnustl_static
APP_CPPFLAGS += -frtti
APP_CPPFLAGS += -fexceptions
APP_CPPFLAGS += -DANDROID
APP_PROJECT_PATH := $(shell pwd)
APP_BUILD_SCRIPT := $(LOCAL_PATH)/../Android.mk
The above 2 problems will be solved.
I had one issue with #Yuri's solution and had to improve it alittle. My APP_ABI is set to all in Application.mk. In my case it meant that among armeabi and armeabi-v7a I'm building also for x86 and mips. I have also android-9 target installed in android sdk to use in other projects. x86 and mips are supported by ndk starting from android-9. As written in the docs, when ndk-build will start building these targets, it will switch to android-9 target automatically. And what? - Yes, it will fail to compile :-). Here is my solution:
In crypto/Android.mk find the line local_c_flags :=
-DNO_WINDOWS_BRAINDEATH. After the line write this http://pastebin.com/7euUVD7A.
Yuri's code has to be inserted into if defined: http://pastebin.com/V58gTSBU
By the way, I've inserted Yuri's block after #include <openssl/dso.h> but not before #ifdef __linux
Related
i am very new to the android ndk and opencv
but i have already run some samples/tutorials of opencv projects in Eclipse
therefore the opencv library should not be a problem
Here i want to run this camera project from github, i think it should work
After I downloaded it and import it into the Eclipse,
I encountered a problem :
When I run it it stops and finishes because the library cannot be loaded in the CameraActivity.
-> System.loadLibrary("PanoHDR");
I have tried to search the web for solutions but they either didn't work or I didn't understand them.
Do I need to do something like "ndk-build" at somewhere to make it work?
Could someone please help me? I cannot find any solution.
here is the default android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
# Tegra optimized OpenCV.mk
include /Users/milmil/Documents/NVPACK/OpenCV-2.4.5-Tegra-sdk-r2/sdk/native/jni/OpenCV-tegra3.mk
# Linker
LOCAL_LDLIBS += -llog
# Our module sources
LOCAL_MODULE := PanoHDR
LOCAL_SRC_FILES := PanoHDR.cpp Panorama.cpp HDR.cpp NativeLogging.cpp
include $(BUILD_SHARED_LIBRARY)
when i try to use ndk-build in cmd in the main dir of the project
it fails
jni/Android.mk:6: /sdk/native/jni/OpenCV.mk: No such file or directory
make: *** No rule to make target `/sdk/native/jni/OpenCV-tegra3'. Stop.
and it should be caused by this line in the Andriod.mk
include /Users/milmil/Documents/NVPACK/OpenCV-2.4.5-Tegra-sdk-r2/sdk/native/jni/OpenCV-tegra3.mk
I try to use the path of my opencv sdk
include /Android/OpenCV-3.1.0-android-sdk/OpenCV-android-sdk/sdk/native/jni/OpenCV.mk
and it returns this in the cmd
Android NDK: WARNING:jni/Android.mk:PanoHDR: non-system libraries in linker flag
s: -lopencv_java3
Android NDK: This is likely to result in incorrect builds. Try using LOCAL_S
TATIC_LIBRARIES
Android NDK: or LOCAL_SHARED_LIBRARIES instead to list the library dependenc
ies of the
Android NDK: current module
[armeabi-v7a] "Compile++ thumb": "PanoHDR <= PanoHDR.cpp"
The system cannot find the path specified.
make: *** [obj/local/armeabi-v7a/objs/PanoHDR/PanoHDR.o] Error 1
Thank you
=========================================================================
WARNING:jni/Android.mk:PanoHDR: non-system libraries in linker flag
s: -lopencv_java3
the above problem is solved by adding "OPENCV_LIB_TYPE=STATIC" in the android.mk, but still has this error "
[armeabi-v7a] "Compile++ thumb": "PanoHDR <= PanoHDR.cpp"
The system cannot find the path specified.
make: *** [obj/local/armeabi-v7a/objs/PanoHDR/PanoHDR.o] Error 1"
I'm getting an error on Galaxy S6 Edge+ where it says it can't load native library. I'm using CSipSimple. It compiles fine if i don't include the arm64-v8a in the Application.mk file. I'm gettings this error:
[arm64-v8a] StaticLibrary : libpj_amr_stagefright_codec.a
[arm64-v8a] StaticLibrary : libpjsip.a
[arm64-v8a] Compile : pjmedia <= echo_webrtc_aec.c
In file included from jni/pjsip/android_toolchain/pjmedia/../../sources/pjmedia/../../../webrtc/sources/modules/audio_processing/aec/include/echo_cancellation.h:14:0,
from jni/pjsip/android_toolchain/pjmedia/../../sources/pjmedia/src/pjmedia/echo_webrtc_aec.c:57:
jni/pjsip/android_toolchain/pjmedia/../../sources/pjmedia/../../../webrtc/sources/typedefs.h:61:2: error: #error Please add support for your architecture in typedefs.h
#error Please add support for your architecture in typedefs.h
^
make[1]: *** [obj/local/arm64-v8a/objs/pjmedia/src/pjmedia/echo_webrtc_aec.o] Error 1
make[1]: *** Waiting for unfinished jobs....
rm jni/swig-glue/android_toolchain/../.pjsua.i
make[1]: Leaving directory `/home/user/data/svn/CSipSimple-trunk/CSipSimple'
make: *** [libraries] Error 2
Here's the portion of the make file (I'll include it in case messed it up):
JNI_DIR := $(call my-dir)
APP_OPTIM := release APP_ABI := armeabi armeabi-v7a x86 mips arm64-v8a
MY_USE_CSIPSIMPLE := 1
MY_USE_G729 := 1
I'm using the Android NDK r10e-rc4, if that helps.
Edit 1:
I also tried building using the following commands in order:
svn update, make clean, make udpate, make
I have the same problem. It looks like the code from WebRTC didn't support arm64-v8a yet.
Apply the patch below to 'webrtc/sources/typedefs.h' from your error message can fix this build break.
#define WEBRTC_ARCH_32_BITS
#define WEBRTC_ARCH_LITTLE_ENDIAN
#define WEBRTC_LITTLE_ENDIAN
+#elif defined(__aarch64__)
+#define WEBRTC_ARCH_64_BITS
+#define WEBRTC_ARCH_LITTLE_ENDIAN
+#define WEBRTC_LITTLE_ENDIAN
#elif defined(__MIPSEL__)
#define WEBRTC_ARCH_32_BITS
#define WEBRTC_ARCH_LITTLE_ENDIAN
also see: https://android.googlesource.com/platform/external/webrtc/+/android-6.0.1_r41/src/typedefs.h
note, the code from the link above doesn't contain #define WEBRTC_LITTLE_ENDIAN, but in the version of my code, WEBRTC_LITTLE_ENDIAN and WEBRTC_ARCH_LITTLE_ENDIAN come in pairs. so I think it depends on version.
I'm encountering an issue with linking C libraries in my Android project using the Android NDK r8b.
I built with the toolchain for ARM the cURL library (no SSL) and it provided me a libcurl.a file and a libcurl.so.4.2.0 one.
I also created a C file to provide functions to my Java code and to use the cURL library.
Android.mk
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE:= libcurl
LOCAL_SRC_FILES := libcurl.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := curljni
LOCAL_SRC_FILES := curljni.c
LOCAL_STATIC_LIBRARIES := libcurl
include $(BUILD_SHARED_LIBRARY)
and now my C file
#include <string.h>
#include <jni.h>
#include <stdio.h>
#include <stdlib.h>
jstring Java_test_curljni_MainActivity_stringFromJNI(JNIEnv* env, jobject thiz)
{
CURL *curl;
CURLcode
......
}
When I try to build with the ndk-build command from my project folder, here's the output error :
Compile thumb : curljni <= curljni.c
jni/curljni.c: In function 'Java_test_curljni_MainActivity_stringFromJNI':
jni/curljni.c:8:3: error: unknown type name 'CURL'
jni/curljni.c:9:3: error: unknown type name 'CURLcode'
jni/curljni.c:11:8: warning: assignment makes pointer from integer without a cast [enabled by default]
jni/curljni.c:13:28: error: 'CURLOPT_URL' undeclared (first use in this function)
jni/curljni.c:13:28: note: each undeclared identifier is reported only once for each function it appears in
/cygdrive/c/android-ndk-r8b/build/core/build-binary.mk:252: recipe for target `obj/local/armeabi/objs/curljni/curljni.o' failed
make: *** [obj/local/armeabi/objs/curljni/curljni.o] Error 1
I've tried many things within the Android.mk file, nothing successful. Using a PREBUILT_SHARED_LIBRARY doesn't help because it requires a .so file only and changing the extension from .so.4.2.0 to .so just tells me that the format is not supported when building ...
One thing I'm not sure about if whether I have to include the headers in my C file, but when I do it, it ofcourse don't find them.
As a note, when I build with only the curl library declared in my Android.mk file (the shared library with the C file is ommitted) then nothing is created in the libs folder !
Thanks in advance for your help !
EDIT ::::
Actually it did work mbrenon (I've tried it millions time and now it works, no idea what's different), but now I have
c:/android-ndk-r8b/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.6.x-google/../../../. ./arm-linux-androideabi/bin/ld.exe: cannot find ./obj/local/armeabi/libcurl.a: Permission denied
I'm using Cygwin, could that be why I encounter permission issues ?
I manage to get around it when the .so and the .a are created, returning the permission error, chmod on it and running the ndk-build again, but that seems a bit rough !
Plus now none of my curl functions can be reached ("undefined reference to (function)").
$ ../../../ndk-build
SharedLibrary : libcurljni.so
./obj/local/armeabi/objs/curljni/curljni.o: In function `Java_test_curljni_MainActivity_stringFromJNI':
C:\android-ndk-r8b\apps\curljni\project/jni/curljni.c:12: undefined reference to `curl_easy_init'
C:\android-ndk-r8b\apps\curljni\project/jni/curljni.c:14: undefined reference to `curl_easy_setopt'
C:\android-ndk-r8b\apps\curljni\project/jni/curljni.c:15: undefined reference to `curl_easy_perform'
C:\android-ndk-r8b\apps\curljni\project/jni/curljni.c:17: undefined reference to `curl_easy_cleanup'
collect2: ld returned 1 exit status
/cygdrive/c/android-ndk-r8b/build/core/build-binary.mk:378: recipe for target `obj/local/armeabi/libcurljni.so' failed
make: *** [obj/local/armeabi/libcurljni.so] Error 1
and my curljni.c is the following
jstring Java_test_curljni_MainActivity_stringFromJNI(JNIEnv* env, jobject thiz)
{
CURL *curl;
CURLcode res;
char buffer[10];
curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "yahoo.com");
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
if(res == 0)
return (*env)->NewStringUTF(env, "0 response");
else
sprintf(buffer,"code: %i",res);
return (*env)->NewStringUTF(env, buffer);
}
else {
return (*env)->NewStringUTF(env, "no curl");
}
}
I made sure every needed function is declared in the curl.h
Yes, you do have to include the Curl headers in your C file. To allow ndk-build to find these header files at link time, you'll have to add their path using LOCAL_EXPORT_C_INCLUDES:
include $(CLEAR_VARS)
LOCAL_MODULE:= libcurl
LOCAL_SRC_FILES := libcurl.a
LOCAL_EXPORT_C_INCLUDES := /* put the path to the Curl headers here */
include $(PREBUILT_STATIC_LIBRARY)
This will automatically add the path to the headers in all the targets requiring libcurl, and it should build and link.
I think I spent most of yesterday unsuccessfully wrestling with this, any help would greatly appreciated and make me extremely happy! Even a next step to try to find the root of the issue is something I'm stuck on at the moment!
I have an Android 2.2 project that's trying to reference a prebuilt LuaJIT static library but ndk-build gives me this error:
test_android.cpp:25: undefined reference to `luaL_newstate'
I built LuaJIT as liblua.a, I've placed that in the root of my JNI directory with the relevant headers. I've have one Android.mk as shown below:
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := lua
LOCAL_SRC_FILES := liblua.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := test
LOCAL_CFLAGS := -Werror
LOCAL_SRC_FILES := test_android.cpp
LOCAL_LDLIBS := -llog -lGLESv2
LOCAL_STATIC_LIBRARIES := lua
include $(BUILD_SHARED_LIBRARY)
In test_andrdoid.cpp I've got this code:
extern "C"
{
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
}
void test()
{
lua_State* lua = lua_open();
}
This seems like a linker error, for some reason the static library file is not being correctly referenced. But, to me, the makefile seems correct.
Any help would be greatly appreciated!
To start with: is there anyway to see how everything is being linked
together and if my shared library module is really get access
to the static library?
Additional Information
Here's extra information that I think could be relevant!
Building the library
Maybe it's the static lib file that's not correct? (Is there anywhere I could download a prebuilt one to check?). I made it with this script (from the LuaJIT website). I'm using the latest stable LuaJIT, 1.1.8
NDK=/cygdrive/c/android-ndk-r8b
NDKABI=8
NDKVER=$NDK/toolchains/arm-linux-androideabi-4.4.3
NDKP=$NDKVER/prebuilt/linux-x86/bin/arm-linux-androideabi-
NDKF="--sysroot $NDK/platforms/android-$NDKABI/arch-arm"
make linux HOST_CC="gcc -m32" CROSS=$NDKP TARGET_FLAGS="$NDKF"
This builds fine and creates a liblua.a in the /src/ directory. (I ran nm on it and it lists out all the function prototypes I'd expect). I don't know if there's anything else I can do to ensure it's really a build for ARM?
NDKABI=8 means I'm targeting Android 2.2
Setting up the test Android Project
I create a brand new 2.2 android project using this command:
android create project --target 3 --name test --path . --activity TestActivity --package com.test
Target 3 maps to Android 2.2 on my system (using android list devices).
I create the jni folder and have a test_android.h and test_android.cpp. Then I use ndk-build to build them - which works fine when I'm not trying to reference LuaJIT. When I do try and use Lua I get the following error:
Full Error Message
Cygwin : Generating dependency file converter script
Compile++ thumb : test <= test_android.cpp
In file included from jni/test_android.h:3:0, from jni/test_android.cpp:2:
C:/android-ndk-r8b/platforms/android-8/arch-arm/usr/include/jni.h:592:13: note:
the mangling of 'va_list' has changed in GCC 4.4
Prebuilt : liblua.a <= jni/
StaticLibrary : libstdc++.a
SharedLibrary : libtest.so
obj/local/armeabi/objs/test/test_android.o: In function `test()':
C:\Users\Grrr\Documents\mycode\static_lib_test/jni/test_android.cpp:25: undefined reference to `luaL_newstate'
collect2: ld returned 1 exit status
/cygdrive/c/android-ndk-r8b/build/core/build-binary.mk:378: recipe for target `obj/local/armeabi/libtest.so' failed make: *** [obj/local/armeabi/libtest.so] Error 1
Most of the issues I've seen searching around are due to the local library include order, as I only have one library this shouldn't be an issue and suggests I've managed to get something more fundamental wrong :)
Update
I've since built normal Lua and added that as prebuilt static library and it works fine. I suspect its how I've built LuaJIT but I'm not sure how to correctly build it, or find a working prebuilt version.
The linking for this was fine, or at least the makefile was.
The problem was the LuaJIT library wasn't built for ARM (I used objdump -a lualib.a, to check this). I downloaded the latest LuaJIT, ran the script under linux and got an ARM library. Everything links nicely now!
I downloaded and installed Android-NDK on my Archlinux, using this package.
Got no issues building (and running) the sample hello-jni following the guide on this page, but if I try to do the same with hello-gl2 I get some errors; it looks like it cannot find some header files:
$ ../../ndk-build
/usr/bin/make -f /opt/android-ndk/build/core/build-local.mk
Compile++ thumb : gl2jni <= gl_code.cpp
/opt/android-ndk/samples/hello-gl2/jni/gl_code.cpp:22:23: error: GLES2/gl2.h: No such file or directory
/opt/android-ndk/samples/hello-gl2/jni/gl_code.cpp:23:26: error: GLES2/gl2ext.h: No such file or directory
--- SNIP ---
GLES2/gl2.h and GLES2/gl2ext.h are however present in $(NDK)/platforms/android-4/arch-arm/usr/include/, and it looks like$(NDK)/build/core/setup-toolchain.mk should set such include path.
Has anybody encountered the same issue? How can I compile this sample?
And then, are there other options to easily build Android-NDK applications? This build system seems quite complicated to me, and I'd prefer using cmake to build my applications.
make sure that APP_ABI and APP_PLATFORM is defined in your Application.mk and your APP_PLATFORM should be higher than android-5... check: gl.h & glext.h not found
for example, in Application.mk define:
APP_ABI := armeabi #armeabi-v7a
APP_STL := stlport_static
APP_PLATFORM := android-8
In my case it was missing the file default.properties with such content:
target=android-5
Put this file into the root project directory. It may help.
You need to use a higher SDK. Level 5 is the minimum to build OpenGL ES 2 code.