问题 Android NDK，两个静态库和链接

我开始创建库作为共享库，但我认为创建一个共享库和其余的静态更高效。当它全部共享时，它编译和链接很好，但转移到静态，我得到链接“未定义的引用”。

编辑： 我将所有库集于一身 Android.mk

Android.mk：

MY_LOCAL_PATH := $(call my-dir)
MY_LOCAL_CFLAGS := -DDEBUG

TARGET_PLATFORM := 'android-4'

LOCAL_PATH := $(MY_LOCAL_PATH)/../../Base

include $(CLEAR_VARS)

LOCAL_MODULE     := Base
LOCAL_SRC_FILES  := <Base src files>
include $(BUILD_STATIC_LIBRARY)

MY_LOCAL_STATIC_LIBRARIES := Base

MY_LOCAL_C_INCLUDES := $(MY_LOCAL_PATH)/../../Base

LOCAL_PATH := $(MY_LOCAL_PATH)/../../Framework

include $(CLEAR_VARS)

LOCAL_MODULE     := Framework
LOCAL_C_INCLUDES := $(MY_LOCAL_C_INCLUDES)
LOCAL_SRC_FILES  := <Framework src files>
LOCAL_CFLAGS := $(MY_LOCAL_CFLAGS)

include $(BUILD_STATIC_LIBRARY)

MY_LOCAL_STATIC_LIBRARIES += Framework

MY_LOCAL_C_INCLUDES += $(MY_LOCAL_PATH)/../../Framework

LOCAL_PATH := $(MY_LOCAL_PATH)/Graphics

include $(CLEAR_VARS)

LOCAL_MODULE    := Graphics
LOCAL_SRC_FILES := <Graphics src files>
LOCAL_EXPORT_LDLIBS := -lGLESv1_CM
LOCAL_CFLAGS := $(MY_LOCAL_CFLAGS)
LOCAL_C_INCLUDES := $(MY_LOCAL_C_INCLUDES)

include $(BUILD_STATIC_LIBRARY)

MY_LOCAL_STATIC_LIBRARIES += Graphics

MY_LOCAL_C_INCLUDES += $(MY_LOCAL_PATH)/Graphics

LOCAL_PATH := $(MY_LOCAL_PATH)/Platform

include $(CLEAR_VARS)

LOCAL_MODULE := Platform
LOCAL_SRC_FILES := <Platform src files>
LOCAL_CFLAGS := $(MY_LOCAL_CFLAGS)
LOCAL_C_INCLUDES := $(MY_LOCAL_C_INCLUDES)

include $(BUILD_STATIC_LIBRARY)

MY_LOCAL_STATIC_LIBRARIES += Platform

MY_LOCAL_C_INCLUDES += $(MY_LOCAL_PATH)/Platform

LOCAL_PATH := $(MY_LOCAL_PATH)

include $(CLEAR_VARS)

LOCAL_MODULE    := Final
LOCAL_SRC_FILES := <Final src files>
LOCAL_STATIC_LIBRARIES := $(MY_LOCAL_STATIC_LIBRARIES)
LOCAL_LDLIBS    := -llog
LOCAL_CFLAGS := $(MY_LOCAL_CFLAGS)
LOCAL_C_INCLUDES := $(MY_LOCAL_C_INCLUDES)

include $(BUILD_SHARED_LIBRARY)

最后一行 ndk-build V=1 -B：

SharedLibrary  : libFinal.so
/Users/robbie/Library/Frameworks/Android-NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/darwin-x86/bin/arm-linux-androideabi-g++ -Wl,-soname,libFinal.so -shared --sysroot=/Users/robbie/Library/Frameworks/Android-NDK/platforms/android-4/arch-arm <object files>   /Users/robbie/Documents/Apps/Revolution/Android/obj/local/armeabi/libBase.a /Users/robbie/Documents/Apps/Revolution/Android/obj/local/armeabi/libFramework.a /Users/robbie/Documents/Apps/Revolution/Android/obj/local/armeabi/libGraphics.a /Users/robbie/Documents/Apps/Revolution/Android/obj/local/armeabi/libPlatform.a /Users/robbie/Documents/Apps/Revolution/Android/obj/local/armeabi/libstdc++.a  /Users/robbie/Library/Frameworks/Android-NDK/platforms/android-4/arch-arm/usr/lib/libc.so /Users/robbie/Library/Frameworks/Android-NDK/platforms/android-4/arch-arm/usr/lib/libstdc++.so /Users/robbie/Library/Frameworks/Android-NDK/platforms/android-4/arch-arm/usr/lib/libm.so   -Wl,--no-undefined -Wl,-z,noexecstack -L/Users/robbie/Library/Frameworks/Android-NDK/platforms/android-4/arch-arm/usr/lib -llog -lGLESv1_CM -lstdc++ -Wl,-rpath-link=/Users/robbie/Library/Frameworks/Android-NDK/platforms/android-4/arch-arm/usr/lib -lsupc++ -o /Users/robbie/Documents/Apps/Revolution/Android/obj/local/armeabi/libFinal.so
/Users/robbie/Documents/Apps/Revolution/Android/obj/local/armeabi/libPlatform.a(ATexture.o): In function `ATexture':
/Users/robbie/Documents/Apps/Revolution/Android/jni/SpinTap/ATexture.cpp:9: undefined reference to `TextureRenderer::TextureRenderer(unsigned int)'
/Users/robbie/Documents/Apps/Revolution/Android/jni/SpinTap/ATexture.cpp:9: undefined reference to `TextureRenderer::TextureRenderer(unsigned int)'

EDIT2： TextureRenderer位于Graphics中，包含在内。

有谁知道为什么它可能不工作以及如何解决它？

这看起来像是一个链接顺序问题。

您的命令行是：

arm-linux-androideabi-g++ -Wl,-soname,libFinal.so -shared \
  libBase.a libFramework.a libGraphics.a libPlatform.a -o libFinal.so

而错误是

libPlatform.a(ATexture.o): In function `ATexture':
ATexture.cpp:9: undefined reference to `TextureRenderer'
ATexture.cpp:9: undefined reference to `TextureRenderer'

TextureRenderer在Graphics中。但是libGraphics在命令行之前就是libPlatform。 g ++将按照给定的顺序在命令行上搜索每个库，加载函数以解析外部引用。它将读取一次libGraphics，加载解析外部引用的函数并转到libPlatform。

尝试改变 LOCAL_STATIC_LIBRARIES := $(MY_LOCAL_STATIC_LIBRARIES) 至 LOCAL_STATIC_LIBRARIES := Platform Graphics Framework Base 看看你是如何继续前进的。

在你的 Android.mk，确保使用正确的调用引用静态库：

LOCAL_STATIC_LIBRARIES := mystaticlibproj

在致电包括之前 $(BUILD_SHARED_LIBRARY)。

然后，在文件末尾，调用以导入静态lib模块

$(call import-module, mystaticlibproj)

如果您仍然遇到问题，请发布详细的构建日志（ndk-build V=1 -B）和你的 Android.mk

除了必须输入更多的System.loadLibrary（）之外，一个共享库有多少好处？ - NebulaFox

我没有你的问题，我只是不知道如何生成静态库来链接。谢谢你的例子。 - Gamma Draconis

我应该提到我在一个Android.mk中编译所有库 - NebulaFox

首先，我会仔细检查TextureRenderer确实在libGraphics.a中，尽管它可能是。使用/Users/robbie/Library/Frameworks/Android-NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/darwin-x86/bin/arm-linux-androideabi-nm将符号转储到库中 - levis501

问题 Android NDK，两个静态库和链接

答案:

热门问题