When I try to build my android project with JNI, with Android NDK r9. I can not build the project and come to this error.
dirname: opérande manquant Saisissez « dirname --help » pour plus d'informations. /bin/sh: 1: ndk-build: not found /bin/sh: 1: ndk-build: not found
This message indicates that my project is not built properly
I don't speak french, but from what I read you have to add the ndk installation directory to your path. Something like
export PATH=$PATH:<path/to/your/ndk/>
I suggest reading https://developer.android.com/tools/sdk/ndk/index.html#GetStarted
Related
I'm trying to get rust working on android. However, when I try to cross-compile to android I get the following linking error:
$ cargo build --target=arm-linux-androideabi
Compiling <project> v0.1.0 (<project>)
error: linking with `/opt/android-sdk/ndk/23.0.7599858/toolchains/llvm/prebuilt/linux-x86_64/bin/armv7a-linux-androideabi31-clang` failed: exit status: 1
(very long toolchain command from cargo)
ld: error: unable to find library -lgcc
clang-12: error: linker command failed with exit code 1 (use -v to see invocation)
I have installed the ndk and changed the linker in .cargo/config to the android clang linker. I also tried the standalone toolchains with the same result. The guide I used was the following: https://mozilla.github.io/firefox-browser-architecture/experiments/2017-09-21-rust-on-android.html
Cross-compilation does work when using crate-type = ["rlib"] instead of crate-type = ["cdylib"], but I need an .so file not an .rlib file.
In case it's relevant, i'm using Manjaro Linux.
UPDATE:
I found the following pull request: https://github.com/rust-lang/rust/pull/85806 After switching to ndk22 it worked. I havn't tried if the pull request fixes the issue (probably does).
Without switching to an older NDK version, I found using the workaround provided by ssrlive to work for me. Here's their comment:
Fixing build error for NDK 23 and above
find out all the 4 folders containing file libunwind.a, in my PC,
it's
C:\Users\Administrator\AppData\Local\Android\Sdk\ndk\23.1.7779620\toolchains\llvm\prebuilt\windows-x86_64\lib64\clang\12.0.8\lib\linux\x86_64\
and more. create 4 text files named libgcc.a in the same folders
with this contents
INPUT(-lunwind)
reference
link
In macOS, the paths are
~/Library/Android/sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/darwin-x86_64/lib64/clang/14.0.1/lib/linux/i386/libunwind.a
~/Library/Android/sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/darwin-x86_64/lib64/clang/14.0.1/lib/linux/arm/libunwind.a
~/Library/Android/sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/darwin-x86_64/lib64/clang/14.0.1/lib/linux/aarch64/libunwind.a
~/Library/Android/sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/darwin-x86_64/lib64/clang/14.0.1/lib/linux/x86_64/libunwind.a
In Linux, the paths are
~/Android/Sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/linux-x86_64/lib64/clang/14.0.1/lib/linux/i386/libunwind.a
~/Android/Sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/linux-x86_64/lib64/clang/14.0.1/lib/linux/aarch64/libunwind.a
~/Android/Sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/linux-x86_64/lib64/clang/14.0.1/lib/linux/x86_64/libunwind.a
~/Android/Sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/linux-x86_64/lib64/clang/14.0.1/lib/linux/arm/libunwind.a
In Windows, the paths are
~/AppData/Local/Android/Sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/windows-x86_64/lib64/clang/14.0.1/lib/linux/aarch64/libunwind.a
~/AppData/Local/Android/Sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/windows-x86_64/lib64/clang/14.0.1/lib/linux/arm/libunwind.a
~/AppData/Local/Android/Sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/windows-x86_64/lib64/clang/14.0.1/lib/linux/i386/libunwind.a
~/AppData/Local/Android/Sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/windows-x86_64/lib64/clang/14.0.1/lib/linux/x86_64/libunwind.a
create file command in Linux/macOS
cat << EOF > libgcc.a
INPUT(-lunwind)
EOF
This is of course extremely brittle and not the "right" solution, but the workaround works fine as of 2022-10-12 with ndk version 25.1.8937393.
I use Android Studio 4.0.1
In my project, my local.properties has the following properties:
sdk.dir=C\:\\Users\\xxx\\AppData\\Local\\Android\\Sdk
ndk.dir=c\:\\yyy\\tools\\android-ndk-r19c
cmake.dir=c\:\\zzz\\cmake-3.17.0-win64-x64
Despite this, I get a compilation error when I Build -> Rebuild project or Clean project because my CMakeLists.txt begins with cmake_minimum_required(VERSION 3.14.3) and Android Studio uses the CMake included in the Android Studio folder instead of the one I point to in cmake.dir:
CMake Error at CMakeLists.txt:5 (cmake_minimum_required):
CMake 3.14.3 or higher is required. You are running version 3.10.2
-- Configuring incomplete, errors occurred!
See also "C:/Users/xxx/AndroidStudioProjects/E2e/app/.cxx/cmake/debug/x86/CMakeFiles/CMakeOutput.log".
FAILED: build.ninja
ninja: error: rebuilding 'build.ninja': subcommand failed
C:\Users\xxx\AppData\Local\Android\Sdk\cmake\3.10.2.4988404\bin\cmake.exe -HC:\Users\xxx\AndroidStudioProjects\E2e\app\src\main\cpp -BC:\Users\xxx\AndroidStudioProjects\E2e\app\.cxx\cmake\debug\x86
What am I missing for AS to pick up the cmake 3.17 I already installed when I select Rebuild Project or Clean Project?
Notes:
The directory I point to with cmake.dir is valid and being read by AS. If I introduce a typo in the path, AS complains about it.
This problem only occurs when I do Build --> Rebuild project or Clean project. If instead I do Build --> Make project, then AS will pick up the cmake version that I point to in local.properties
Clean Project worked again after deleting .cxx folder
I'm not sure about Android Studio, but you could try editing the project's build.gradle :
android {
externalNativeBuild {
cmake {
path file('CMakeLists.txt')
version '3.24.1'
}
}
}
.... and CMakeLists.txt :
cmake_minimum_required(VERSION 3.24.1)
I am unable to build a NDK project from the Android Studio environment but can build it manually using the command console.
I get the following error after building:
Error:Execution failed for task ':xxxxxx:compileReleaseNdk'.> com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Users\xxxxx\AppData\Local\Android\SDK\android-sdk\ndk-bundle\ndk-build.cmd'' finished with non-zero exit value 2
I got a similar error while invoking ndk-build.cmd manually using the console from the jni directory where my NDK project is stored.However I fixed it by modifying the following in my Application.mk file as follows:
NDK_TOOLCHAIN_VERSION := 4.9
since 4.9 is the tool chain available on my install. I suspect from the Android Studio environment, the toolchain version is being picked incorrectly, and yet I do not know where to set this option in the GUI.
The build.gradle file has the following NDK block:
ndk{
moduleName "xxxxxx"
ldLibs "log"
cFlags "-std=c++11 -fexceptions"
stl "gnustl_static"
abiFilters "arm64-v8a armeabi armeabi-v7a mips mips64 x86 x86_64"
}
Please advise me on how to go about solving this problem.
Just out of curiosity, I moved my project directory to the desktop and tried to build that project. The build was successful.
Finally narrowed down the problem to the NDK compiler not being able to create the following intermediate object file inside my project folder:
C:\Users\xxxxx\GitRepos\REVIEWS\xxx\SMART-xxx\xxxx-xxx-androidnative\xxxLibraries\xxxlibrary\build\intermediates\ndk\debug\obj/local/arm64-v8a/objs/natXXXX/C_\Users\xxxxx\GitRepos\REVIEWS\xxx\SMART-xxxx\xxxx-xxx-androidnative\xxxLibraries\xxxlibrary\src\main\jni\NativeXXXX.o.d
The reason was the well known windows path cannot exceed 255 characters issue. As you can see above the NDK-Build utility tries to append a deep folder hierarchy like "C_\Users\xxxxx\GitRepos\REVIEWS\xxx\SMART-xxxx\xxxx-xxx-androidnative\xxxLibraries\xxxlibrary\src\main\jni\" which exceeds MAX_PATH.
I am naive in android ndk right now . i tried steps given in this url: https://www3.ntu.edu.sg/home/ehchua/programming/android/Android_NDK.html
According to this i import sample of HELLO_JNI in my eclipse from android ndkr_10 and when i ran it throws error in logcat given below
08-17 18:12:01.472: E/AndroidRuntime(1269): java.lang.UnsatisfiedLinkError: Couldn't load hello-jni from loader dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/com.example.hellojni-2.apk"],nativeLibraryDirectories=[/data/app-lib/com.example.hellojni-2, /vendor/lib, /system/lib]]]: findLibrary returned null
can somebody help me sort this problem
where i miss?
Thanks in advance
Your error mean that no hello-jni lib was found. The tutorial you follow says that you should have myjni lib.
After compiling your projet to an apk you can run the command line unzip -l you_apk_file. In the list of file you should see your .so file.
I got following error while build Android-ndk Please help me.
Cygwin.bat
#echo off
set IS_UNIX=
set DEV_ROOT=C:/iliu-Android-NDK-Fibonacci-a546a1a
set JAVA_HOME=C:/Program Files/Java/jre6/bin
set CLASSPATH=C:/iliu-Android-NDK-Fibonacci-a546a1a/obj
set PATH=D:/new_eclipse/android-sdk-windows/android-sdk-windows/tools;D:/new_eclipse/android-sdk-windows/android-sdk-windows/android-ndk-r7
set ANDROID_NDK_ROOT=/cygdrive/d/new_eclipse/android-sdk-windows/android-sdk-windows/android-ndk-r7
set NDK_PROJECT_PATH=/cygdrive/C/iliu-Android-NDK-Fibonacci-a546a1a
C:
chdir C:/cygwin/bin
bash --login -i
**Error:**
$ ./ndk-build
Android NDK: Could not find application project directory !
Android NDK: Please define the NDK_PROJECT_PATH variable to point to it.
/cygdrive/d/new_eclipse/android-sdk-windows/android-sdk-windows/android-ndk-r7/build/core/build-local.mk:102: *** Android NDK: Aborting . Stop.
I got following error while build Android-ndk
Please help me.
You have to call ndk-build from your project directory, so in pseudocode,
cd $MyProject
$NDK/ndk-build
you should call ndk from the of your project
like that :
C:\Users\Xhunter\AndroidStudioProjects\mupdf\platform\android\viewer>C:\Users\Xhunter\Downloads\ndk\ndk\ndk-build