链接android ndk中的静态库

Question

我正在尝试从http://developer.nvidia.com/tegra-resources,在android ndk示例,libs文件夹中编译nvfile库.无论如何,因为我并不真的需要整套库,所以我拿出了我需要的库,看起来它的依赖性.这是用于编译它们的Android.mk文件.

include $(CLEAR_VARS)
LOCAL_MODULE     := nvthread
LOCAL_CFLAGS     := -Wall -g
LOCAL_LDFLAGS    := -Wl,-Map,xxx.map
LOCAL_SRC_FILES  := nv/nv_thread/nv_thread.c
LOCAL_C_INCLUDES := nv

include $(BUILD_STATIC_LIBRARY)


include $(CLEAR_VARS)
LOCAL_MODULE           := nvfile
LOCAL_CFLAGS           := -Wall -g
LOCAL_LDFLAGS          := -Wl,-Map,xxx.map
LOCAL_SRC_FILES        := nv/nv_file/nv_file.c
LOCAL_C_INCLUDES       := nv
LOCAL_STATIC_LIBRARIES := nvthread nvapkfile

include $(BUILD_STATIC_LIBRARY)


include $(CLEAR_VARS)
LOCAL_MODULE           := nvapkfile
LOCAL_CFLAGS           := -Wall -g
LOCAL_LDFLAGS          := -Wl,-Map,xxx.map
LOCAL_SRC_FILES        := nv/nv_apk_file/nv_apk_file.c
LOCAL_C_INCLUDES       := nv
LOCAL_STATIC_LIBRARIES := nvthread

include $(BUILD_STATIC_LIBRARY)

nvapkfile库似乎能够很好地与nvthread链接,但是nvfile库似乎根本不想链接到nvapkfile库.源代码中的include文件工作正常,只是每当我尝试编译它时,我得到一个未定义的引用.以下是输出示例:

/home/leif/MarbleMachine/android/obj/local/armeabi/libnvfile.a(nv_file.o): In function `NvFInit':
/home/leif/MarbleMachine/android/jni/nv/nv_file/nv_file.c:49: undefined reference to `NvAPKInit'
/home/leif/MarbleMachine/android/obj/local/armeabi/libnvfile.a(nv_file.o): In function `NvFOpen':
/home/leif/MarbleMachine/android/jni/nv/nv_file/nv_file.c:77: undefined reference to `NvAPKOpen'
/home/leif/MarbleMachine/android/jni/nv/nv_file/nv_file.c:82: undefined reference to `NvAPKOpen'
/home/leif/MarbleMachine/android/obj/local/armeabi/libnvfile.a(nv_file.o): In function `NvFClose':
/home/leif/MarbleMachine/android/jni/nv/nv_file/nv_file.c:97: undefined reference to `NvAPKClose'
/home/leif/MarbleMachine/android/obj/local/armeabi/libnvfile.a(nv_file.o): In function `NvFGetc':
/home/leif/MarbleMachine/android/jni/nv/nv_file/nv_file.c:118: undefined reference to `NvAPKGetc'
/home/leif/MarbleMachine/android/obj/local/armeabi/libnvfile.a(nv_file.o): In function `NvFGets':
/home/leif/MarbleMachine/android/jni/nv/nv_file/nv_file.c:133: undefined reference to `NvAPKGets'
/home/leif/MarbleMachine/android/obj/local/armeabi/libnvfile.a(nv_file.o): In function `NvFSize':
/home/leif/MarbleMachine/android/jni/nv/nv_file/nv_file.c:148: undefined reference to `NvAPKSize'
/home/leif/MarbleMachine/android/obj/local/armeabi/libnvfile.a(nv_file.o): In function `NvFSeek':
/home/leif/MarbleMachine/android/jni/nv/nv_file/nv_file.c:171: undefined reference to `NvAPKSeek'
/home/leif/MarbleMachine/android/obj/local/armeabi/libnvfile.a(nv_file.o): In function `NvFTell':
/home/leif/MarbleMachine/android/jni/nv/nv_file/nv_file.c:186: undefined reference to `NvAPKTell'
/home/leif/MarbleMachine/android/obj/local/armeabi/libnvfile.a(nv_file.o): In function `NvFRead':
/home/leif/MarbleMachine/android/jni/nv/nv_file/nv_file.c:201: undefined reference to `NvAPKRead'
/home/leif/MarbleMachine/android/obj/local/armeabi/libnvfile.a(nv_file.o): In function `NvFEOF':
/home/leif/MarbleMachine/android/jni/nv/nv_file/nv_file.c:216: undefined reference to `NvAPKEOF'

我根本没有修改过实际的c或h文件.但作为参考,这里是一个相关的C文件:

#include "nv_file.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#ifdef ANDROID
#include "../nv_apk_file/nv_apk_file.h"
#define SUPPORT_APK 1
#include <unistd.h>
#endif

//...

void  NvFInit()
{
#ifdef SUPPORT_APK
    NvAPKInit();
#endif
}

这是nv_file.c的第22-32行和第46-51行

如您所见,标题包含在内,但它不是链接.有谁知道我在这里缺少什么？谢谢.

Answer 1

呃……看来我只是按错了顺序。转动这一行（在 nvfile 模块中）：

LOCAL_STATIC_LIBRARIES := nvthread nvapkfile

到

LOCAL_STATIC_LIBRARIES := nvapkfile nvthread

让它编译得很好。任何人都可以确认您在 LOCAL_STATIC_LIBRARIES 中列出库的顺序很重要吗？谢谢。