如何在 ndk 应用程序中链接任何库 [英] How to link any library in ndk application
问题描述
来自本教程.
看到我有一个名为 stackoverflow.a
的预构建静态库,它有 stackoverflow.h
see i have one pre-built static library named as stackoverflow.a
and it has stackoverflow.h
现在我想在
ndk_demo.c
//那个教程有这个文件
ndk_demo.c
// that tutorial has this file
对于 ndk_demo.c
里面我已经添加了
for that inside ndk_demo.c
i have added
#include 'stackoverflow.h'
<小时>
编辑
inside `android-ndk-r7c`
|
apps
|
ndk_demo
|
-----------------
| |
project Application.mk
|
--------------------
| |
all other |
folder jni
|
-------------------------------------------------------------------
| | | | |
ndk_demo.c stackoverflow.h lib com_marakana Android.mk
| _NativeLib.h
|
--------------------
| |
Android.mk libstackoverflow.a
现在Application.mk
APP_PROJECT_PATH := $(call my-dir)/project
APP_MODULES := ndk_demo stackover
现在jni/Android.mk
include $(call all-subdir-makefiles)
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := ndk_demo
LOCAL_SRC_FILES := ndk_demo.c
LOCAL_STATIC_LIBRARIES := stackover
include $(BUILD_SHARED_LIBRARY)
现在jni/lib/Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := stackover
LOCAL_SRC_FILES := libstackoverflow.a
include $(PREBUILT_STATIC_LIBRARY)
LOCAL_PATH := $(call my-dir)
现在从 android-ndk-r7c
目录我跑了
make APP=ndk_demo
它向我显示错误,例如
it shows me error like
Android NDK: Building for application 'ndk_demo'
make: *** No rule to make target `build/core/ndk_demo.c', needed by `out/apps/ndk_demo/armeabi/objs/ndk_demo/ndk_demo.o'. Stop.
为什么会发生这种情况我没有得到?
why this happening i am not getting ?
如果我评论
#include $(call all-subdir-makefiles)
这个来自 jni/Android.mk
然后它显示以下错误
this from jni/Android.mk
then it shows following error
Android NDK: Building for application 'ndk_demo'
Compile thumb : ndk_demo <= ndk_demo.c
SharedLibrary : libndk_demo.so
./out/apps/ndk_demo/armeabi/objs/ndk_demo/ndk_demo.o: In function `Java_com_marakana_NativeLib_hello':
/home/jeegar/android-ndk-r7c/apps/ndk_demo/project/jni/ndk_demo.c:10: undefined reference to `stackoverflowInit'
collect2: ld returned 1 exit status
make: *** [out/apps/ndk_demo/armeabi/libndk_demo.so] Error 1
推荐答案
当你得到make: * No rule to make target `something.c'"时,表示它不能找到文件.
when you get "make: * No rule to make target `something.c'", it just means it can't find the file.
我有点困惑你为什么要这样组织你的项目,但如果我要构建你的项目,我会这样做:
I'm a bit confused why you've organized your project like that, but if I was going to build your project, I would do it as follows:
(doesn't matter which directory)
|
-->(ndk_demo)
-->-->(jni)
-->-->-->Application.mk
-->-->-->Android.mk
-->-->-->com_marakana_NativeLib.h
-->-->-->ndk_demo.c
-->-->(stackoverflow)
-->-->-->stackoverflow.h
-->-->-->libstackoverflow.a
然后我会使用下面的makefile:
Then I would use the following makefile:
Android.mk:
LOCAL_PATH := $(call my-dir)
### include stackoverflow as a prebuilt lib ###
include $(CLEAR_VARS)
LOCAL_MODULE := stackoverflow-prebuilt
LOCAL_SRC_FILES := ../stackoverflow/libstackoverflow.a
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/../stackoverflow
include $(PREBUILT_STATIC_LIBRARY)
### build your ndk lib ###
include $(CLEAR_VARS)
LOCAL_MODULE := ndk_demo
LOCAL_C_INCLUDES := $(LOCAL_PATH)
$(LOCAL_PATH)/../stackoverflow
LOCAL_SRC_FILES := ndk_demo.c
LOCAL_LDLIBS := -llog
LOCAL_STATIC_LIBRARIES := stackoverflow-prebuilt
include $(BUILD_SHARED_LIBRARY)
还有以下内容:
Application.mk:
APP_MODULES := ndk_demo
APP_PLATFORM := android-8
最后,我将导航到目录 (ndk_demo) 并运行 ndk-build.
Then finally, I would navigate to the directory (ndk_demo) and run ndk-build.
ndk-build 是 android 的构建工具.你应该使用它.可以在以下位置找到:
ndk-build is android's build tool. You should use it. It can be found at:
(AndroidSDK)/(NDK)/ndk-build
如果您使用的是 Windows,则必须在控制台中输入 ndk-build 的完整路径,或者在尝试运行之前将环境变量添加到系统中.
if you are using windows, you will either have to type the full path of ndk-build into the console, or add an environment variable to your system before trying to run it.
http://www.windows7hacker.com/index.php/2010/05/how-to-addedit-environment-variables-in-windows-7/
这篇关于如何在 ndk 应用程序中链接任何库的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!