我有一个共享库文件faceblaster-engine.so
,编译为arm-linux-androideabi
,位于Android Studio的jniLibs文件夹中。我在jni文件夹中也有一个简单的cpp文件。在Android Studio中链接无NDK标头的共享对象库
我的库是用Rust编写的,所以我没有头文件,我想通过cpp文件调用它里面的函数,但似乎无法使库正确链接。为了测试,我做了一个简单的函数:
锈
#[no_mangle]
pub extern fn rust_test() -> c_int {
82 as c_int
}
C++
extern "C" {
// Test for calling rust function
int rust_test();
jint
Java_com_fureality_faceblaster_MainActivity_testRustLaunch(JNIEnv* env, jobject thiz)
{
return rust_test();
}
} // End extern
Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := faceblaster-engine
LOCAL_SRC_FILES := ../jniLibs/$(TARGET_ARCH_ABI)/libfaceblaster-engine.so
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := faceblaster
LOCAL_SRC_FILES := gl-tests.cpp
LOCAL_SHARED_LIBRARIES := faceblaster-engine
include $(BUILD_SHARED_LIBRARY)
错误
/home/nathan/Development/projects/faceblaster-android/app/src/main/jni/gl-tests.cpp
Error:(23) undefined reference to `rust_test'
Error:error: ld returned 1 exit status
make: *** [/home/nathan/Development/projects/faceblaster-android/app/build/intermediates/ndk/debug/obj/local/arm64-v8a/libfaceblaster.so] Error 1
Error:Execution failed for task ':app:compileDebugNdk'.
> com.android.ide.common.internal.LoggedErrorException: Failed to run command:
/home/nathan/Development/bin/android-ndk-r10d/ndk-build NDK_PROJECT_PATH=null APP_BUILD_SCRIPT=/home/nathan/Development/projects/faceblaster-android/app/build/intermediates/ndk/debug/Android.mk APP_PLATFORM=android-21 NDK_OUT=/home/nathan/Development/projects/faceblaster-android/app/build/intermediates/ndk/debug/obj NDK_LIBS_OUT=/home/nathan/Development/projects/faceblaster-android/app/build/intermediates/ndk/debug/lib APP_ABI=all
Error Code:
2
Output:
/home/nathan/Development/projects/faceblaster-android/app/build/intermediates/ndk/debug/obj/local/arm64-v8a/objs/faceblaster//home/nathan/Development/projects/faceblaster-android/app/src/main/jni/gl-tests.o: In function `Java_com_fureality_faceblaster_MainActivity_testRustLaunch':
/home/nathan/Development/projects/faceblaster-android/app/src/main/jni/gl-tests.cpp:23: undefined reference to `rust_test'
collect2: error: ld returned 1 exit status
make: *** [/home/nathan/Development/projects/faceblaster-android/app/build/intermediates/ndk/debug/obj/local/arm64-v8a/libfaceblaster.so] Error 1
我不知道如果我的生成文件没有被拾起,或者如果它是正确的吗?任何人都有关于如何正确链接这个.so文件和注册我想使用的函数的想法?
在此先感谢您的帮助!
编辑 - 添加Java源和防锈代码编制方法
的Java
public class MainActivity extends Activity {
// External libraries to load
static {
System.loadLibrary("faceblaster-engine");
System.loadLibrary("faceblaster");
}
// External functions to register
public native int testRustLaunch();
@Override
protected void onCreate(Bundle savedInstanceState) {
// Other stuff omitted for brevity
Log.d(TAG, "Testing call...");
int test = testRustLaunch();
Log.d(TAG, "Received: " + test);
}
}
锈编译
cargo build --target=arm-linux-androideabi
# /project/.cargo/config file
[target.arm-linux-androideabi]
linker = "/opt/ndk_standalone/bin/arm-linux-androideabi-gcc"
# Cargo.toml
[lib]
name = "faceblaster-engine"
crate_type = ["dylib"]
编辑2
我已经build.gradle
脚本编辑,我知道我正在读,现在用我的Android.mk,但我仍然得到同样的编译错误:(
编辑3
原来这两个问题的答案在下面帮助解决这个问题。它主要是Android Studio的一部分,没有选择我的makefile文件,防火墙代码没有正确声明为#[no_mangle] pub extern
,我的makefile文件全部被封装起来。
或许,这将是很好的说明你是如何编译锈代码的(共享? ) 图书馆。 – Shepmaster 2015-01-27 01:45:37
@Shepmaster谢谢你指出,编译笔记已被添加:) – nathansizemore 2015-01-28 01:48:59
在哪个阶段你的错误发生?你能否告诉我们编译C++ shim的时候?它在运行时吗?还有一点呢?有没有办法在编译/链接阶段获得详细输出? – Shepmaster 2015-01-28 02:02:04