JNI静态库无法链接

Question

我正在尝试调试构建应用程序的C++端时出现的一些链接错误。 Android.mk看起来如下：

LOCAL_PATH := $(call my-dir) 

include $(CLEAR_VARS) 

LOCAL_MODULE := GLES 
LOCAL_SRC_FILES := ModelGLES.cpp RendererGLES.cpp 
LOCAL_LDLIBS := -llog -lGLESv1_CM 
LOCAL_LDFLAGS := -Wl,-Map,$(LOCAL_MODULE).map 

include $(BUILD_SHARED_LIBRARY) 

include $(CLEAR_VARS) 

LOCAL_MODULE := SndSys 
LOCAL_SRC_FILES := SndSys.cpp libaudio_wrapper.cpp 
LOCAL_STATIC_LIBRARIES := libaudio_ARM_NDK 
LOCAL_LDLIBS := -llog 
LOCAL_LDFLAGS := -Wl,-Map,$(LOCAL_MODULE).map 
LOCAL_C_INCLUDES := $(LOCAL_PATH) 

include $(BUILD_SHARED_LIBRARY) 

我得到的错误是libaudio_wrapper。链接器无法改变libaudio_ARM_NDK中的符号。文件夹结构如下所示：

应用程序\ JNI \ SndSys.cpp libaudio_wrapper.cpp Android.mk libaudio_ARM_NDK.a

我打电话JNI的文件夹内NDK建造形式。输出如下：

Gdbserver  : [arm-linux-androideabi-4.4.3] libs/armeabi/gdbserver 
Gdbsetup  : libs/armeabi/gdb.setup 
Compile++ thumb : GLES <= ModelGLES.cpp 
Compile++ thumb : GLES <= RendererGLES.cpp 
SharedLibrary : libGLES.so 
Install  : libGLES.so => libs/armeabi/libGLES.so 
Compile++ thumb : SndSys <= SndSys.cpp 
Compile++ thumb : SndSys <= libaudio_wrapper.cpp 
SharedLibrary : libSndSys.so 
/Users/bob/Desktop/Root/Relaxation/obj/local/armeabi/objs-debug/SndSys/libaudio_wrapper.o: In function `audioInit(int, int)': 
/Users/bob/Desktop/Root/Relaxation/jni/libaudio_wrapper.cpp:37: undefined reference to `GetAudioChannelSize' 
/Users/bob/Desktop/Root/Relaxation/jni/libaudio_wrapper.cpp:38: undefined reference to `GetAudioInitControlSize' 

是否有一种简单的方法来查看链接器是否正在查找我的库？或者让命令行调用gcc或ld？

Answer 1

问题是我升级到了ndk-r5。构建Prebuilt库的一些规则已经改变。每个预建库都需要为其预留自己的模块。 Android.ml的下半部分应该看起来像这样...

include $(CLEAR_VARS) 

LOCAL_MODULE := audiolib 
LOCAL_SRC_FILES := libaudio_ARM_NDK.a 

include $(PREBUILT_STATIC_LIBRARY) 


include $(CLEAR_VARS) 

LOCAL_MODULE := SndSys 
LOCAL_SRC_FILES := SndSys.cpp libaduio_wrapper.cpp 
LOCAL_STATIC_LIBRARIES := audiolib 
LOCAL_LDLIBS := -llog 

include $(BUILD_SHARED_LIBRARY)