Android NDK鏈接器錯誤路徑

Question

我目前正在使用使用共享庫的NDK項目。我有兩個共享庫來集成：libsatprotocol.so和libsat-tanca.so。

所以我添加到我的Android.mk這些庫，所以我可以做一個包裝。對於libsatprotocol，一切工作正常。但對於libsat-TANCA，我得到Android的崩潰：

java.lang.UnsatisfiedLinkError: dlopen failed: could not load library "/home/lucas/Rockspoon/satlib/Android/app/src/main/obj/local/armeabi/libsat-tanca.so" needed by "libsat-jni.so"; caused by library "/home/lucas/Rockspoon/satlib/Android/app/src/main/obj/local/armeabi/libsat-tanca.so" not found 
                       at java.lang.Runtime.loadLibrary(Runtime.java:371) 
                       at java.lang.System.loadLibrary(System.java:989) 

因此，奇怪的是，我這條道路在圖書館我的電腦路徑，並沒有從那裏得到它的線索。如果我刪除依賴關係的libsat-tanca，它可以正常工作（在libsatprotocol中）。

這裏是我的Android.mk：

LOCAL_PATH := $(call my-dir) 
#LOCAL_ALLOW_UNDEFINED_SYMBOLS=true 

include $(CLEAR_VARS) 

LOCAL_MODULE := sat-tanca 
LOCAL_SRC_FILES := tanca/$(TARGET_ARCH_ABI)/libsat-tanca.so 

include $(PREBUILT_SHARED_LIBRARY) 

include $(CLEAR_VARS) 

LOCAL_MODULE := sat-dimep 
LOCAL_SRC_FILES := dimep/$(TARGET_ARCH_ABI)/libsatprotocol.so 

include $(PREBUILT_SHARED_LIBRARY) 

include $(CLEAR_VARS) 

LOCAL_MODULE := sat-jni 
LOCAL_SRC_FILES := satlib.c 
LOCAL_LDLIBS += -L$(SYSROOT)/usr/lib -lz -llog 
LOCAL_SHARED_LIBRARIES := sat-tanca sat-dimep 

include $(BUILD_SHARED_LIBRARY) 

Application.mk

APP_ABI := armeabi #armeabi-v7a mips x86 x86_64 
LOCAL_SRC_FILES := $(TARGET_ARCH_ABI)/libsatprotocol.so $(TARGET_ARCH_ABI)/libsat-tanca.so 

SATControl.java

static { 
    System.loadLibrary("sat-jni"); 
} 

的build.gradle（APP）

應用插件：'com.android.application'

android { 
    compileSdkVersion 23 
    buildToolsVersion "23.0.3" 

    defaultConfig { 
     applicationId "com.rockspoon.libraries.satlib" 
     minSdkVersion 19 
     targetSdkVersion 23 
     versionCode 1 
     versionName "1.0" 
     ndk { 
      moduleName "sat-jni" 
     } 
    } 

    sourceSets.main { 
     jni.srcDirs = [] // This prevents the auto generation of Android.mk 
     jniLibs.srcDir 'src/main/libs' // This is not necessary unless you have precompiled libraries in your project. 
    } 

    buildTypes { 
     release { 
      minifyEnabled false 
      proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 
     } 
    } 

    task buildNative(type: Exec, description: 'Compile JNI source via NDK') { 
     def ndkDir = android.ndkDirectory 
     commandLine "$ndkDir/ndk-build", 
       '-C', file('src/main/jni').absolutePath, // Change src/main/jni the relative path to your jni source 
       '-j', Runtime.runtime.availableProcessors(), 
       'all', 
       'NDK_DEBUG=1' 
    } 

    task cleanNative(type: Exec, description: 'Clean JNI object files') { 
     def ndkDir = android.ndkDirectory 
     commandLine "$ndkDir/ndk-build", 
       '-C', file('src/main/jni').absolutePath, // Change src/main/jni the relative path to your jni source 
       'clean' 
    } 

    clean.dependsOn 'cleanNative' 

    tasks.withType(JavaCompile) { 
     compileTask -> compileTask.dependsOn buildNative 
    } 
} 

dependencies { 
    compile fileTree(dir: 'libs', include: ['*.jar']) 
    testCompile 'junit:junit:4.12' 
    compile 'com.android.support:appcompat-v7:23.4.0' 
} 

任何想法爲什麼它只鏈接libsat-tanca.so與我的PC路徑？

Answer 1

這裏有兩件事對我來說看起來很不對勁，但我不確定這是什麼導致鏈接路徑不正確。

1）該行中的$（SYSROOT）變量指向您機器上的路徑，對不對？

LOCAL_LDLIBS += -L$(SYSROOT)/usr/lib -lz -llog 

如果鏈接爲zlib和日誌庫是目的，你可以使用以下和構建將做正確的事情：

LOCAL_LDLIBS += -lz -llog 

2）爲什麼下面的行放在Application.mk？你不應該需要這個，但我不認爲這可能會導致鏈接問題。

LOCAL_SRC_FILES := $(TARGET_ARCH_ABI)/libsatprotocol.so $(TARGET_ARCH_ABI)/libsat-tanca.so