Android NDK:如何将Android.mk包含到另一个Android.mk(分层项目结构)中？

Question

看起来有可能,但我的脚本会产生奇怪的结果:

LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)

include $(LOCAL_PATH)/libos/Android.mk
include $(LOCAL_PATH)/libbase/Android.mk
include $(LOCAL_PATH)/utils/Android.mk

LOCAL_MODULE := native
include $(BUILD_SHARED_LIBRARY)

只有第一个包被解析正常,其他Android.mk文件正在奇数路径上被查询.建议？

更新:我破坏了我的建筑环境......在办公室没问题,但在家里LOCAL_PATH:= $(调用my-dir)将LOCAL_PATH定义为NDK目录而不是项目目录.这是我的建筑批次:

set BASHPATH=K:\cygwin\bin\bash
set PROJECTDIR=/cygdrive/h/Alex/Alex/Work/Android/remote-android
set NDKDIR=/cygdrive/h/Alex/Programming_Docs/Android/android-ndk-r6/ndk-build
set APP_BUILD_SCRIPT=/cygdrive/h/Alex/Alex/Work/Android/project/jni/Android.mk
set DEV_ROOT=h:/Alex/Alex/Work/Android/project

%BASHPATH% --login -c "cd %PROJECTDIR% && %NDKDIR%"

更新:我绝对不明白这件事是如何构成路径的.我收到路径错误,如"/cygdrive/d/project/jni//cygdrive/d/Soft/project/jni/libos/src/libos.cpp".这是在我决定指定根目录中的所有文件之后Android.mk而不是包含子模块.

更新2: 没有运气,这也不起作用:

LOCAL_PATH:= $(call my-dir)
# Include makefiles here.
include $(LOCAL_PATH)/libos/Android.mk
include $(LOCAL_PATH)/libbase/Android.mk
include $(LOCAL_PATH)/utils/Android.mk

# Clear variables here.
 include $(CLEAR_VARS)

Answer 1

在这里很晚,但是如果有人读到这个问题,一种方法来解决破坏路径的问题(指向你的文件从jni中输入的ndk)是在你的jni文件夹中:

include $(call all-subdir-makefiles)

然后在它的每个子文件夹中(在OP的情况下为libos,libbase和ustils)这个形式的Android.mk:

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_C_INCLUDES        := $(LOCAL_PATH)
LOCAL_MODULE            := utils
LOCAL_SRC_FILES         := one.c
LOCAL_SRC_FILES         += two.c

这第二个Android.mk在jni文件夹中找到子文件夹中的one.c和two.c文件.

请注意尝试的东西

LOCAL_PATH_BIS_WEIRD_OTHER_NAME := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_C_INCLUDES        := $(LOCAL_PATH_OTHER_FUNKY_NAME)
LOCAL_MODULE            := utils
LOCAL_SRC_FILES         := one.c
LOCAL_SRC_FILES         += two.c

将再次导致一个混乱的编译器寻找ndk所在的源代码.

因此,在jni的每个子目录中以这种形式使用LOCAL_PATH:= $(调用my-dir),并在jni中包含$(call all-subdir-makefiles),你应该没有问题.

希望这会对某人有所帮助.

编辑:发生此行为是因为包含$(CLEAR_VARS)不会删除LOCAL_PATH中保留的内容.

Answer 2

这是我如何做到的.

需要注意的是,我没有在构建目录中放置任何C++源代码,因为大部分内容都与平台无关.这只是意味着LOCAL_PATH不是项目目录的子目录,而/ jni中的唯一文件是2 .mk文件.

无论如何,这是一个完整的顶级Android.mk和一个真实项目的包含:

顶层:

LOCAL_PATH := $(abspath $(call my-dir)/../../../src)

# utility to create paths for included makefiles
local-rel-path = $(patsubst /%,%,$(subst $(LOCAL_PATH),,$(abspath $1)))

include $(CLEAR_VARS)

LOCAL_MODULE := NativeApp

LOCAL_LDLIBS := -lGLESv1_CM

# As opposed to "thumb"
LOCAL_ARM_MODE := arm

LOCAL_SRC_FILES :=

#
# includes
#
# Note that LOCAL_C_INCLUDE is relative to thr NDK root, unlike source paths
# (or you can just make 'em absolute)
#
STL_INC_DIR = /cygdrive/c/STLport-5.2.1/stlport

MY_LOCAL_C_INCLUDES := core satcalc bruce/bruce/inc bruce/gfx/inc bruce/ui/inc bruce/unzip bruce/libpng

LOCAL_C_INCLUDES := $(addprefix $(LOCAL_PATH)/,$(MY_LOCAL_C_INCLUDES)) $(STL_INC_DIR) 

ifeq ($(APP_OPTIM),debug)
# debug
LOCAL_CFLAGS = -DPLATFORM_ANDROID -D_DEBUG -fvisibility=hidden
else
#release
LOCAL_CFLAGS = -DPLATFORM_ANDROID -fvisibility=hidden
endif

LOCAL_STATIC_LIBRARIES := 

#
# Code
#
include $(LOCAL_PATH)/core/Android.mk
include $(LOCAL_PATH)/satcalc/Android.mk
include $(LOCAL_PATH)/bruce/bruce/src/Android.mk
include $(LOCAL_PATH)/bruce/gfx/src/Android.mk
include $(LOCAL_PATH)/bruce/ui/src/Android.mk
include $(LOCAL_PATH)/bruce/unzip/Android.mk
include $(LOCAL_PATH)/bruce/libpng/Android.mk

#
# Build it
#
include $(BUILD_SHARED_LIBRARY)

...和一个包含Android.mk:

MY_PATH = $(call my-dir)

MY_LOCAL = $(call local-rel-path, $(MY_PATH))

MY_SRC_FILES = Font.cpp Gfx2d_ogles.cpp SgaState.cpp \
        Sprite.cpp TImage.cpp TImageOgles.cpp 

LOCAL_SRC_FILES += $(addprefix $(MY_LOCAL)/,$(MY_SRC_FILES))

Answer 3

我的同意是这样的:

LOCAL_PATH:= $(call my-dir)

# Clear variables here.
include $(CLEAR_VARS)

# Current module settings.
LOCAL_MODULE := native
# setup some source files
LOCAL_SRC_FILES := file1.c file2.c
# setup some includes
LOCAL_C_INCLUDES := $(LOCAL_PATH)/libos/include
# setup the included libs for the main module
LOCAL_STATIC_LIBRARIES := libos libbase utils # note that order matters here

include $(BUILD_SHARED_LIBRARY)

# Include makefiles here. Its important that these 
# includes are done after the main module, explanation below.

# create a temp variable with the current path, because it 
# changes after each include
ZPATH := $(LOCAL_PATH)

include $(ZPATH)/libos/Android.mk
include $(ZPATH)/libbase/Android.mk
include $(ZPATH)/utils/Android.mk

注意,包括在当前模块变量的设置之后完成.这是必需的,因为每个include修改了LOCAL_PATH变量(实际上它修改了$(调用my-dir)返回的内容),这就是为什么包含必须在最后完成.

这将自动编译所有包含的模块(如果使用clean调用则清理),然后链接所有包含的库.

此设置已在实际项目中测试并正常运行.

从这里回答:https://docs.google.com/document/d/1jDmWgVgorTY_njX68juH5vt0KY_FXWgxkxmi2v_W_a4/edit

Answer 4

你走在正确的轨道上.这是将Android.mk文件包含在另一个文件中的正确方法 - 它实际上是Android make系统所必需的.需要注意的一点是,清除变量的行应该出现在 - 包括其他makefile之后 - 如下所示:

LOCAL_PATH:= $(call my-dir)

# Include makefiles here.
include $(LOCAL_PATH)/libos/Android.mk
include $(LOCAL_PATH)/libbase/Android.mk
include $(LOCAL_PATH)/utils/Android.mk

# Clear variables here.
include $(CLEAR_VARS)

# Final settings.
LOCAL_MODULE := native
include $(BUILD_SHARED_LIBRARY)

我还要提到你可能想要或不想设置的其他重要标志,包括以下内容(我的一个makefile中的示例):

# Settings.
LOCAL_C_INCLUDES             := $(MY_INCLUDES)
LOCAL_STATIC_LIBRARIES       := $(MY_MODULES) 
LOCAL_WHOLE_STATIC_LIBRARIES := $(MY_WHOLE_MODULES) 
LOCAL_LDLIBS                 := -lz -llog -lGLESv1_CM -lGLESv2 
LOCAL_ARM_MODE               := arm
LOCAL_MODULE                 := game

最后,我发现Android ndk中嵌入的文档特别有用.矿井位于以下位置:

android-ndk-r6/documentation.html

如果您有其他问题,请与我们联系.希望这可以帮助!:)

Answer 5

这里的答案很晚,但我遇到了这个问题,这些解决方案都没有用.该解决方案被证明是直截了当:详见这里,设置一个MY_LOCAL_PATH变量,并重新分配LOCAL_PATH每次:

MY_LOCAL_PATH := $(call my-dir)

LOCAL_PATH := $(MY_LOCAL_PATH)

... declare one module

include $(LOCAL_PATH)/foo/Android.mk

LOCAL_PATH := $(MY_LOCAL_PATH)

... declare another module