Android编译系统参考手册
build/core/clear_vars.mk
Clear out values of all variables used by rule templates
清除LOCAL变量，每个模块的Android.mk，一般会先包含该文件
变量定义主要出现在base_rules.mk，config.mk，definitions.mk
LOCAL_MODULE
LOCAL_MODULE表示模块的名称
LOCAL_MODULE将在每个模块的makefile里定义，如果未定义，编译系统会报错
LOCAL_MODULE_PATH
表示模块编译结果将要存放的目录
recovery模块的Android.mk里有
LOCAL_MODULE := nandroid-md5.sh
LOCAL_MODULE_PATH := $(TARGET_RECOVERY_ROOT_OUT)/sbin
说明：nandroid-md5.sh 将存放于out/Cyanogenmod/target/product/m7ul/recovery/root/sbin
如果模块的Android.mk里未定义LOCAL_MODULE_PATH
那么LOCAL_MODULE_PATH := $($(my_prefix)OUT$(partition_tag)_$(LOCAL_MODULE_CLASS))
在recovery模块里recovery可执行文件相关变量如下：
比如my_prefix为TARGET_，partition_tag为空,LOCAL_MODULE_CLASS为EXECUTABLES
那么LOCAL_MODULE_PATH为$(TARGET_OUT_EXECUTABLES)，
值应该为
out/Cyanogenmod/target/product/m7ul/system/bin
LOCAL_MODULE_STEM
表示编译链接后的目标文件的文件名，不带后缀
LOCAL_MODULE_STEM := $(strip $(LOCAL_MODULE_STEM))
ifeq ($(LOCAL_MODULE_STEM),)
LOCAL_MODULE_STEM := $(LOCAL_MODULE)
endif
例：
recovery模块编译recovery可执行文件：
LOCAL_MODULE_STEM:=recovery
LOCAL_DONT_CHECK_MODULE
如果定义了该变量，那么模块将不被检查
ifdef LOCAL_DONT_CHECK_MODULE
LOCAL_CHECKED_MODULE :=
endif
LOCAL_CHECKED_MODULE
需要检查的模块
ifndef LOCAL_CHECKED_MODULE
ifndef LOCAL_SDK_VERSION
LOCAL_CHECKED_MODULE := $(LOCAL_BUILT_MODULE)
endif
endif
LOCAL_BUILT_MODULE
表示编译链接后的目标文件(文件路径+文件名)
LOCAL_BUILT_MODULE := $(built_module_path)/$(LOCAL_BUILT_MODULE_STEM)
比如recovery:
LOCAL_BUILT_MODULE 路径；
out/Cyanogenmod/target/product/m7ul/obj/EXECUTABLES/recovery_intermediates/recovery
LOCAL_BUILT_MODULE_STEM
表示编译链接后的目标文件的文件名，带后缀
LOCAL_BUILT_MODULE_STEM := $(strip $(LOCAL_BUILT_MODULE_STEM))
ifeq ($(LOCAL_BUILT_MODULE_STEM),)
LOCAL_BUILT_MODULE_STEM := $(LOCAL_INSTALLED_MODULE_STEM)
endif
例：
recovery模块编译recovery可执行文件：
LOCAL_INSTALLED_MODULE_STEM:=recovery
OVERRIDE_BUILT_MODULE_PATH
只有内部动态链接库模块可以使用OVERRIDE_BUILT_MODULE_PATH
OVERRIDE_BUILT_MODULE_PATH := $(strip $(OVERRIDE_BUILT_MODULE_PATH))
ifdef OVERRIDE_BUILT_MODULE_PATH
ifneq ($(LOCAL_MODULE_CLASS),SHARED_LIBRARIES)
$(error $(LOCAL_PATH): Illegal use of OVERRIDE_BUILT_MODULE_PATH)
endif
built_module_path := $(OVERRIDE_BUILT_MODULE_PATH)
else
built_module_path := $(intermediates)
endif
LOCAL_INSTALLED_MODULE
表示模块的安装路径+文件名，存放在安装目录
ifneq (true,$(LOCAL_UNINSTALLABLE_MODULE))
LOCAL_INSTALLED_MODULE := $(LOCAL_MODULE_PATH)/$(LOCAL_INSTALLED_MODULE_STEM)
endif
示例：
out/Cyanogenmod/target/product/m7ul/system/bin/recovery
LOCAL_UNINSTALLABLE_MODULE
表示该模块是否安装至手机，像sdk文档模块不会被安装至手机，
因此LOCAL_UNINSTALLABLE_MODULE为true
LOCAL_INTERMEDIATE_TARGETS
Assemble the list of targets to create PRIVATE_ variables for.
LOCAL_INTERMEDIATE_TARGETS += $(LOCAL_BUILT_MODULE)
LOCAL_UNSTRIPPED_PATH
没有strip的程序存放路径，通常放在symbols目录
Instructs the build system to put the unstripped version of the module somewhere
other than what's normal for its type.
Usually, you override this because you overrode LOCAL_MODULE_PATH for an executable or a shared
library.
If you overrode LOCAL_MODULE_PATH, but not LOCAL_UNSTRIPPED_PATH, an error will occur.
LOCAL_MODULE_CLASS
将用于决定编译时的中间文件存放的位置
LOCAL_MODULE_CLASS在定义目标生成方式的makefile文件里定义，
比如executable.mk里定义LOCAL_MODULE_CLASS := EXECUTABLES
在recovery模块的Android.mk里定义的LOCAL_MODULE_CLASS有：
LOCAL_MODULE_CLASS := RECOVERY_EXECUTABLES
LOCAL_MODULE_CLASS := UTILITY_EXECUTABLES
其它的LOCAL_MODULE_CLASS有
LOCAL_MODULE_CLASS := ETC
LOCAL_MODULE_CLASS := STATIC_LIBRARIES
LOCAL_MODULE_CLASS := EXECUTABLES
LOCAL_MODULE_CLASS := FAKE
LOCAL_MODULE_CLASS := JAVA_LIBRARIES
LOCAL_MODULE_CLASS := SHARED_LIBRARIES
LOCAL_MODULE_CLASS := APPS
对应 Cyanogenmod/target/product/m7ul/obj 的目录
比如说若 LOCAL_MODULE_CLASS := ETC
那么该模块编译的中间文件将存放于
Cyanogenmod/target/product/m7ul/obj/ETC
LOCAL_MODULE_SUFFIX
表示编译链接后的目标文件的后缀
LOCAL_PACKAGE_NAME
App名字
示例： Dialer, Contacts, etc.
This will probably change or go away when we switch to an ant-based build system for the apps.
LOCAL_OVERRIDES_PACKAGES
Some packages may override others using LOCAL_OVERRIDES_PACKAGE
示例：
packages/apps/DeskClock/Android.mk:13:LOCAL_OVERRIDES_PACKAGES := AlarmClock
LOCAL_EXPORT_PACKAGE_RESOURCES
若定义该变量，资源文件打包成一个apk
示例：
frameworks/base/core/res/Android.mk:34:LOCAL_EXPORT_PACKAGE_RESOURCES := true
LOCAL_MANIFEST_PACKAGE_NAME
在build/core/definitions.mk里inherit-package函数有用到LOCAL_MANIFEST_PACKAGE_NAME
LOCAL_REQUIRED_MODULES
本模块依赖的模块
Set LOCAL_REQUIRED_MODULES to any number of whitespace-separated module names, like "libblah" or
"Email".
If this module is installed, all of the modules that it requires will be installed as well.
This can be used to, e.g., ensure that necessary shared libraries
or providers are installed when a given app is installed
示例：
LOCAL_REQUIRED_MODULES += $(installed_shared_library_module_names)
LOCAL_ACP_UNAVAILABLE
示例：
build/tools/acp/Android.mk:23:LOCAL_ACP_UNAVAILABLE := true
LOCAL_MODULE_TAGS
模块的tag，为debug eng tests optional samples shell_ash shell_mksh等tag的组合，一个模块可有多个
Tag,
注意现在模块现在不能使用user作为模块的Tag,
以前如果使用user做为tag,那么这个模块将被自动安装，
如果想定义自动安装的模块，需要在PRODUCT_PACKAGES变量里添加该模块，
该变量在build/target/product/base.mk和build/target/product/core.mk里有赋值，这是所有产品都将继承
的基础配置
另外每个设备可在自己的产品配置文件device_*.mk里设置该变量，添加更多的模块
如果当前目录或者父目录有*_GPL*的文件，那么将自动添加gnu的tag
LOCAL_SRC_FILES
源代码文件集合
LOCAL_PREBUILT_OBJ_FILES
示例：
sdk/find_lock/Android.mk:50:LOCAL_PREBUILT_OBJ_FILES += images/$(FIND_LOCK_ICON_OBJ)
LOCAL_STATIC_JAVA_LIBRARIES
要链接的Java库，被链接的库将不会安装在手机上，因此会放到链接生成的java包里
示例：
packages/apps/Exchange/Android.mk:24:LOCAL_STATIC_JAVA_LIBRARIES := android-common
com.android.emailcommon
LOCAL_STATIC_LIBRARIES
表示模块要链接的静态库
ifneq (,$(filter libcutils libutils,$(LOCAL_STATIC_LIBRARIES)))
LOCAL_STATIC_LIBRARIES := $(call insert-liblog,$(LOCAL_STATIC_LIBRARIES))
endif
示例：external/busybox/Android.mk
LOCAL_STATIC_LIBRARIES := libcutils libc libm
最终：
LOCAL_STATIC_LIBRARIES := libcutils libc libm liblog
LOCAL_GROUP_STATIC_LIBRARIES
示例：
build/core/binary.mk:223:ifeq (true,$(LOCAL_GROUP_STATIC_LIBRARIES))
LOCAL_WHOLE_STATIC_LIBRARIES
链接时会将LOCAL_WHOLE_STATIC_LIBRARIES类型的静态链接库的所有目标代码放入最终目标文件里，而不去掉
These are the static libraries that you want to include in your module without allowing the linker
to remove dead code from them. This is mostly useful if you want to add a static library to a
shared library and have the static library's content exposed from the shared library.
ifneq (,$(filter libcutils libutils,$(LOCAL_WHOLE_STATIC_LIBRARIES)))
LOCAL_WHOLE_STATIC_LIBRARIES := $(call insert-liblog,$(LOCAL_WHOLE_STATIC_LIBRARIES))
endif
示例：
dalvik/vm/Android.mk
LOCAL_WHOLE_STATIC_LIBRARIES += libexpat libcutils libdex liblog libz
最终
LOCAL_WHOLE_STATIC_LIBRARIES += libexpat libcutils libdex liblog libz liblog
LOCAL_SHARED_LIBRARIES
表示模块要链接的动态链接库
ifneq (,$(filter libcutils libutils,$(LOCAL_SHARED_LIBRARIES)))
LOCAL_SHARED_LIBRARIES := $(call insert-liblog,$(LOCAL_SHARED_LIBRARIES))
endif
示例：frameworks/av/media/mtp模块
Android.mk LOCAL_SHARED_LIBRARIES := libutils libcutils libusbhost libbinder
最终：LOCAL_SHARED_LIBRARIES： libutils liblog libcutils libusbhost libbinder
LOCAL_IS_HOST_MODULE
表示该模块是否是将在主机上运行的模块
LOCAL_CC
你可以通过LOCAL_CC定义一个不同的C编译器
LOCAL_CXX
你可以通过LOCAL_CXX定义一个不同的C++编译器
LOCAL_CPP_EXTENSION
当前c++代码文件后缀
external/protobuf/Android.mk:177:LOCAL_CPP_EXTENSION := .cc
LOCAL_NO_DEFAULT_COMPILER_FLAGS
通常为C或者C++源代码文件的编译提供了默认的头文件目录和flag，可以通过
LOCAL_NO_DEFAULT_COMPILER_FLAGS设置不使用这些东东
LOCAL_NO_FDO_SUPPORT
示例：
build/core/binary.mk:136:ifeq ($(strip $(LOCAL_NO_FDO_SUPPORT)),)
LOCAL_ARM_MODE
示例：
ndk/tests/build/build-mode/jni/Android.mk:19:LOCAL_ARM_MODE := thumb
ndk/tests/build/build-mode/jni/Android.mk:32:LOCAL_ARM_MODE := arm
LOCAL_YACCFLAGS
Any flags to pass to invocations of yacc for your module.
A known limitation here is that the flags will be the same for all invocations of YACC for your
module.
This can be fixed. If you ever need it to be, just ask.
LOCAL_YACCFLAGS := -p kjsyy
LOCAL_ASFLAGS
Explicitly declare assembly-only __ASSEMBLY__ macro for
assembly source
LOCAL_ASFLAGS += -D__ASSEMBLY__
LOCAL_CFLAGS
表示编译C代码时用的参数
LOCAL_CPPFLAGS
编译C++代码使用的flag
./frameworks/av/media/libstagefright/Android.mk:78:LOCAL_CPPFLAGS += -DUSE_TI_CUSTOM_DOMX
LOCAL_RTTI_FLAG
编译C++代码使用rtti标记
./external/icu4c/common/Android.mk:135:LOCAL_RTTI_FLAG := -frtti
LOCAL_C_INCLUDES
编译C代码使用的头文件目录
LOCAL_EXPORT_C_INCLUDE_DIRS
示例：
system/core/libsuspend/Android.mk:18:LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
LOCAL_LDFLAGS
表示链接时用的参数
LOCAL_LDLIBS
额外的动态链接库
LOCAL_LDLIBS allows you to specify additional libraries that are not part of the build for your
executable or library.
Specify the libraries you want in -lxxx format; they're passed directly to the link line.
However, keep in mind that there will be no dependency generated for these libraries.
It's most useful in simulator builds where you want to use a library preinstalled on the host.
The linker (ld) is a particularly fussy beast,
so it's sometimes necessary to pass other flags here if you're doing something sneaky.
Some examples:
LOCAL_LDLIBS += -lcurses -lpthread
LOCAL_AAPT_FLAGS
使用aapt编译资源包时所用的flag
packages/apps/Calendar/Android.mk:35:LOCAL_AAPT_FLAGS := --auto-add-overlay
LOCAL_AAPT_INCLUDE_ALL_RESOURCES
使用AAPT编译时需用的一个标记，打包资源时会用到该比较
build/core/package.mk:391:ifeq ($(LOCAL_AAPT_INCLUDE_ALL_RESOURCES),true)
packages/inputmethods/LatinIME/java/Android.mk:37:LOCAL_AAPT_INCLUDE_ALL_RESOURCES := true
LOCAL_SYSTEM_SHARED_LIBRARIES
ifdef LOCAL_IS_HOST_MODULE
ifeq ($(LOCAL_SYSTEM_SHARED_LIBRARIES),none)
LOCAL_SYSTEM_SHARED_LIBRARIES :=
endif
else
ifeq ($(LOCAL_SYSTEM_SHARED_LIBRARIES),none)
LOCAL_SYSTEM_SHARED_LIBRARIES := $(TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES)
endif
endif
示例：
TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES：libc libstdc++ libm
LOCAL_SYSTEM_SHARED_LIBRARIES：libc libstdc++ libm
LOCAL_PREBUILT_LIBS
预编译好的库，当使用including $(BUILD_PREBUILT) or $(BUILD_HOST_PREBUILT)
会将LOCAL_PREBUILT_LIBS所指的库拷贝到安装目录
LOCAL_PREBUILT_EXECUTABLES
预编译好的可执行程序，一般通过include $(BUILD_PREBUILT)设置
会将预编译好的程序拷贝直接拷贝至安装目录
LOCAL_PREBUILT_JAVA_LIBRARIES
示例：
prebuilts/misc/common/kxml2/Android.mk:19:LOCAL_PREBUILT_JAVA_LIBRARIES := kxml2-2.3.0
$(COMMON_JAVA_PACKAGE_SUFFIX)
LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES
示例：
packages/apps/CMUpdater/Android.mk:39:LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES :=
dashclockapi:libs/dashclock-api-r1.1.jar
LOCAL_PREBUILT_STRIP_COMMENTS
示例：
build/core/prebuilt.mk:52: ifneq ($(LOCAL_PREBUILT_STRIP_COMMENTS),)
LOCAL_INTERMEDIATE_SOURCES
示例：
frameworks/base/Android.mk:249:LOCAL_INTERMEDIATE_SOURCES := \
LOCAL_INTERMEDIATE_SOURCE_DIR
表示编译生成的源文件存放目录
LOCAL_INTERMEDIATE_SOURCE_DIR := $(intermediates.COMMON)/src
例：out/target/common/obj/EXECUTABLES/recovery_intermediates/src
LOCAL_JAVACFLAGS
If you have additional flags to pass into the javac compiler, add them here. For example:
LOCAL_JAVACFLAGS += -Xlint:deprecation
LOCAL_JAVA_LIBRARIES
当链接java app程序和库时， LOCAL_JAVA_LIBRARIES指定了哪些java类将被包含，
目前只有 LOCAL_JAVA_LIBRARIES := core framework
注意目前编译app设置LOCAL_JAVA_LIBRARIES是不必要的，也不被允许的，在include $(BUILD_PACKAGE)时
合适的库都会被包含进来
LOCAL_NO_STANDARD_LIBRARIES
示例：
frameworks/base/Android.mk:254:LOCAL_NO_STANDARD_LIBRARIES := true
LOCAL_CLASSPATH
示例：
external/javassist/Android.mk:21:LOCAL_CLASSPATH := $(HOST_JDK_TOOLS_JAR)
LOCAL_DROIDDOC_USE_STANDARD_DOCLET
示例：
device/sample/frameworks/PlatformLibrary/Android.mk:48:LOCAL_DROIDDOC_USE_STANDARD_DOCLET := true
LOCAL_DROIDDOC_SOURCE_PATH
示例：
build/core/droiddoc.mk:40:LOCAL_DROIDDOC_SOURCE_PATH := $(LOCAL_PATH)
LOCAL_DROIDDOC_TEMPLATE_DIR
暂时未见用到
LOCAL_DROIDDOC_CUSTOM_TEMPLATE_DIR
示例：
frameworks/base/Android.mk:591:LOCAL_DROIDDOC_CUSTOM_TEMPLATE_DIR:=build/tools/droiddoc/templates
-sdk
LOCAL_DROIDDOC_ASSET_DIR
示例：
build/core/droiddoc.mk:143:$(full_target): PRIVATE_OUT_ASSET_DIR := $(out_dir)/
$(LOCAL_DROIDDOC_ASSET_DIR)
LOCAL_DROIDDOC_CUSTOM_ASSET_DIR
示例：
build/tools/droiddoc/test/stubs/Android.mk:25:LOCAL_DROIDDOC_CUSTOM_ASSET_DIR:=assets-google
LOCAL_DROIDDOC_OPTIONS
示例：
device/sample/frameworks/PlatformLibrary/Android.mk:46:LOCAL_DROIDDOC_OPTIONS :=
com.example.android.platform_library
LOCAL_DROIDDOC_HTML_DIR
示例：
frameworks/base/Android.mk:429:framework_docs_LOCAL_DROIDDOC_HTML_DIR := docs/html
LOCAL_ASSET_FILES
编译Android Package(app)程序时，通常用LOCAL_ASSET_FILES，表示assets目录的所有文件
通常使用方式：
LOCAL_ASSET_FILES += $(call find-subdir-assets)
LOCAL_ASSET_DIR
编译Android Package(app)程序时，通常用LOCAL_ASSET_FILES，表示assets目录的所有文件
通常使用方式：
LOCAL_ASSET_FILES += $(call find-subdir-assets)
LOCAL_RESOURCE_DIR
示例：
packages/apps/Gallery2/Android.mk:59:LOCAL_RESOURCE_DIR += $(LOCAL_PATH)/res
LOCAL_JAVA_RESOURCE_DIRS
示例：
frameworks/base/tools/layoutlib/bridge/Android.mk:20:LOCAL_JAVA_RESOURCE_DIRS := resources
LOCAL_JAVA_RESOURCE_FILES
示例：
frameworks/base/Android.mk:261:LOCAL_JAVA_RESOURCE_FILES += $(LOCAL_PATH)/preloaded-classes
LOCAL_GENERATED_SOURCES
编译时生成的源代码文件，像aidl将转为java代码
LOCAL_COPY_HEADERS_TO
需要拷贝头头文件至哪个安装目录
LOCAL_COPY_HEADERS
需要拷贝至安装目录的头文件集合，你需要同时定义LOCAL_COPY_HEADERS_TO
LOCAL_FORCE_STATIC_EXECUTABLE
强制编译为静态可执行文件，这样在执行时不会去查找动态链接库
一般只有安装在sbin目录下的可执行文件使用该变量
如果想程序在recovery下运行，一般都需要添加该变量
示例：
LOCAL_FORCE_STATIC_EXECUTABLE := true
LOCAL_ADDITIONAL_DEPENDENCIES
额外的依赖
If your module needs to depend on anything else that isn't actually built in to it,
you can add those make targets to LOCAL_ADDITIONAL_DEPENDENCIES.
Usually this is a workaround for some other dependency that isn't created automatically.
LOCAL_ENABLE_APROF
编译动态链接库时用到
LOCAL_ENABLE_APROF_JNI
示例：
build/core/shared_library.mk:26:ifeq ($(strip $(LOCAL_ENABLE_APROF_JNI)),true)
LOCAL_COMPRESS_MODULE_SYMBOLS
暂未见赋值之处
示例：
build/core/dynamic_binary.mk:74:ifeq ($(LOCAL_COMPRESS_MODULE_SYMBOLS),true)
LOCAL_STRIP_MODULE
表示该模块生成的目标是否需要被strip
Calculated in base_rules.make to determine if this module should actually be stripped or not,
based on whether LOCAL_STRIPPABLE_MODULE is set, and whether the combo is configured to ever
strip modules.
With Iliyan's stripping tool, this might change.
LOCAL_JNI_SHARED_LIBRARIES
示例：
packages/inputmethods/LatinIME/java/Android.mk:27:LOCAL_JNI_SHARED_LIBRARIES := libjni_latinime
LOCAL_JNI_SHARED_LIBRARIES_ABI
暂未见赋值之处
示例：
build/core/package.mk:346: jni_shared_libraries_abi := $(LOCAL_JNI_SHARED_LIBRARIES_ABI)
LOCAL_JAR_MANIFEST
示例：
cts/tools/dasm/src/Android.mk:24:LOCAL_JAR_MANIFEST := ../etc/manifest.txt
LOCAL_INSTRUMENTATION_FOR
示例：
packages/apps/Gallery/tests/Android.mk:15:LOCAL_INSTRUMENTATION_FOR := Gallery
LOCAL_MANIFEST_INSTRUMENTATION_FOR
示例：
build/core/definitions.mk:2046: $(call keep-or-
override,LOCAL_MANIFEST_INSTRUMENTATION_FOR,$(patsubst &&%,%,$(word 7,$(_o)))) \
LOCAL_AIDL_INCLUDES
示例：
build/core/base_rules.mk:185:LOCAL_AIDL_INCLUDES += $(FRAMEWORKS_BASE_JAVA_SRC_DIRS)
LOCAL_JARJAR_RULES
示例：
frameworks/base/Android.mk:263:#LOCAL_JARJAR_RULES := $(LOCAL_PATH)/jarjar-rules.txt
build/core/java.mk:281:$(full_classes_jarjar_jar): PRIVATE_JARJAR_RULES := $(LOCAL_JARJAR_RULES)
LOCAL_ADDITIONAL_JAVA_DIR
示例：
frameworks/base/Android.mk:738:LOCAL_ADDITIONAL_JAVA_DIR:=$(framework_docs_LOCAL_ADDITIONAL_JAVA_D
IR)
LOCAL_ALLOW_UNDEFINED_SYMBOLS
示例：
bionic/libthread_db/Android.mk:27:LOCAL_ALLOW_UNDEFINED_SYMBOLS := false
LOCAL_DX_FLAGS
用dx处理jar代码的flag
LOCAL_CERTIFICATE
签名用的证书
./device/samsung/galaxys2-common/DeviceSettings/Android.mk:11:LOCAL_CERTIFICATE := platform
LOCAL_SDK_VERSION
build/core/java.mk里定义该变量
LOCAL_SDK_VERSION := $(PDK_BUILD_SDK_VERSION)
如果定义了LOCAL_SDK_VERSION，那么需要定义ndk编译相关变量
因为编译app时，常需要编译jni代码
示例：LOCAL_SDK_VERSION: 9
LOCAL_SDK_RES_VERSION
./build/core/static_java_library.mk:62:LOCAL_SDK_RES_VERSION:=$(strip $(LOCAL_SDK_RES_VERSION))
LOCAL_NDK_STL_VARIANT
./packages/inputmethods/LatinIME/native/jni/Android.mk:97:LOCAL_NDK_STL_VARIANT := stlport_static
LOCAL_EMMA_INSTRUMENT
使用emma进行覆盖代码测试
./build/core/java_library.mk:54:LOCAL_EMMA_INSTRUMENT := false
LOCAL_PROGUARD_ENABLED
是否启用混淆
LOCAL_PROGUARD_FLAGS
混淆使用的flag
LOCAL_PROGUARD_FLAG_FILES
混淆使用的flag文件
LOCAL_EMMA_COVERAGE_FILTER
示例：
packages/apps/Browser/Android.mk:20:LOCAL_EMMA_COVERAGE_FILTER := *,-com.android.common.*
LOCAL_WARNINGS_ENABLE
示例：
build/core/definitions.mk:1468: $(if $(findstring
true,$(LOCAL_WARNINGS_ENABLE)),$(xlint_unchecked),) \
LOCAL_FULL_MANIFEST_FILE
示例：
build/core/package.mk:63:LOCAL_FULL_MANIFEST_FILE := $(LOCAL_PATH)/$(LOCAL_MANIFEST_FILE)
LOCAL_MANIFEST_FILE
示例：
build/core/package.mk:57:LOCAL_MANIFEST_FILE := AndroidManifest.xml
LOCAL_RENDERSCRIPT_INCLUDES
示例：
frameworks/base/tests/RenderScriptTests/ImageProcessing2/Android.mk:30:LOCAL_RENDERSCRIPT_INCLUDES
_OVERRIDE := $(TOPDIR)external/clang/lib/Headers \
LOCAL_RENDERSCRIPT_INCLUDES_OVERRIDE
示例：
frameworks/base/tests/RenderScriptTests/ImageProcessing2/Android.mk:30:LOCAL_RENDERSCRIPT_INCLUDES
_OVERRIDE := $(TOPDIR)external/clang/lib/Headers \
LOCAL_RENDERSCRIPT_CC
示例：
build/core/java.mk:161:LOCAL_RENDERSCRIPT_CC := $(LLVM_RS_CC)
LOCAL_RENDERSCRIPT_FLAGS
示例：
frameworks/base/tests/RenderScriptTests/ImageProcessing2/Android.mk:33:LOCAL_RENDERSCRIPT_FLAGS
:= -rs-package-name=android.support.v8.renderscript
LOCAL_RENDERSCRIPT_TARGET_API
示例：
frameworks/base/tests/RenderScriptTests/ImageProcessing2/Android.mk:29:LOCAL_RENDERSCRIPT_TARGET_A
PI := 17
LOCAL_BUILD_HOST_DEX
示例：
libcore/JavaLibrary.mk:137:LOCAL_BUILD_HOST_DEX := true
LOCAL_DEX_PREOPT
如果编译模式选择的是user或者userdebug，那么LOCAL_DEX_PREOPT默认为true，这样资源apk和代码文件分离
成为odex
build/core/package.mk:156:LOCAL_DEX_PREOPT := true
LOCAL_PROTOC_OPTIMIZE_TYPE
示例：
hardware/ril/mock-ril/Android.mk:57:LOCAL_PROTOC_OPTIMIZE_TYPE := full
LOCAL_PROTOC_FLAGS
编译.proto文件使用的flag，暂未见赋值
build/core/binary.mk:291:$(proto_generated_cc_sources): PRIVATE_PROTOC_FLAGS :=
$(LOCAL_PROTOC_FLAGS)
LOCAL_NO_CRT
示例：
bionic/linker/Android.mk:70:LOCAL_NO_CRT := true
LOCAL_PROPRIETARY_MODULE
是否是设备专有模块
LOCAL_MODULE_OWNER
示例：
vendor/samsung/galaxys2-common/proprietary/Android.mk:21:LOCAL_MODULE_OWNER := samsung
LOCAL_CTS_TEST_PACKAGE
示例：
cts/tests/uiautomator/Android.mk:29:LOCAL_CTS_TEST_PACKAGE := android.uiautomator
LOCAL_CTS_TEST_RUNNER
示例：
cts/tests/tests/accessibilityservice/Android.mk:32:LOCAL_CTS_TEST_RUNNER :=
com.android.cts.tradefed.testtype.AccessibilityServiceTestRunner
LOCAL_CLANG
表示编译C代码
LOCAL_ADDRESS_SANITIZER
地址对齐
LOCAL_JAR_EXCLUDE_FILES
示例：
build/core/static_java_library.mk:44:LOCAL_JAR_EXCLUDE_FILES :=
$(ANDROID_RESOURCE_GENERATED_CLASSES)
LOCAL_LINT_FLAGS
暂未见赋值之处
LOCAL_SOURCE_FILES_ALL_GENERATED
LOCAL_SOURCE_FILES_ALL_GENERATED is set only if the module does not have static source files,
but generated source files in its LOCAL_INTERMEDIATE_SOURCE_DIR
You have to set up the dependency in some other way.
LOCAL_DONT_DELETE_JAR_META_INF
示例：
cts/tests/core/ctscore.mk:24:LOCAL_DONT_DELETE_JAR_META_INF := true
build/core/java.mk:263:$(full_classes_compiled_jar): PRIVATE_DONT_DELETE_JAR_META_INF :=
$(LOCAL_DONT_DELETE_JAR_META_INF)
Clear out values of all variables used by rule templates
清除LOCAL变量，每个模块的Android.mk，一般会先包含该文件
变量定义主要出现在base_rules.mk，config.mk，definitions.mk
LOCAL_MODULE
LOCAL_MODULE表示模块的名称
LOCAL_MODULE将在每个模块的makefile里定义，如果未定义，编译系统会报错
LOCAL_MODULE_PATH
表示模块编译结果将要存放的目录
recovery模块的Android.mk里有
LOCAL_MODULE := nandroid-md5.sh
LOCAL_MODULE_PATH := $(TARGET_RECOVERY_ROOT_OUT)/sbin
说明：nandroid-md5.sh 将存放于out/Cyanogenmod/target/product/m7ul/recovery/root/sbin
如果模块的Android.mk里未定义LOCAL_MODULE_PATH
那么LOCAL_MODULE_PATH := $($(my_prefix)OUT$(partition_tag)_$(LOCAL_MODULE_CLASS))
在recovery模块里recovery可执行文件相关变量如下：
比如my_prefix为TARGET_，partition_tag为空,LOCAL_MODULE_CLASS为EXECUTABLES
那么LOCAL_MODULE_PATH为$(TARGET_OUT_EXECUTABLES)，
值应该为
out/Cyanogenmod/target/product/m7ul/system/bin
LOCAL_MODULE_STEM
表示编译链接后的目标文件的文件名，不带后缀
LOCAL_MODULE_STEM := $(strip $(LOCAL_MODULE_STEM))
ifeq ($(LOCAL_MODULE_STEM),)
LOCAL_MODULE_STEM := $(LOCAL_MODULE)
endif
例：
recovery模块编译recovery可执行文件：
LOCAL_MODULE_STEM:=recovery
LOCAL_DONT_CHECK_MODULE
如果定义了该变量，那么模块将不被检查
ifdef LOCAL_DONT_CHECK_MODULE
LOCAL_CHECKED_MODULE :=
endif
LOCAL_CHECKED_MODULE
需要检查的模块
ifndef LOCAL_CHECKED_MODULE
ifndef LOCAL_SDK_VERSION
LOCAL_CHECKED_MODULE := $(LOCAL_BUILT_MODULE)
endif
endif
LOCAL_BUILT_MODULE
表示编译链接后的目标文件(文件路径+文件名)
LOCAL_BUILT_MODULE := $(built_module_path)/$(LOCAL_BUILT_MODULE_STEM)
比如recovery:
LOCAL_BUILT_MODULE 路径；
out/Cyanogenmod/target/product/m7ul/obj/EXECUTABLES/recovery_intermediates/recovery
LOCAL_BUILT_MODULE_STEM
表示编译链接后的目标文件的文件名，带后缀
LOCAL_BUILT_MODULE_STEM := $(strip $(LOCAL_BUILT_MODULE_STEM))
ifeq ($(LOCAL_BUILT_MODULE_STEM),)
LOCAL_BUILT_MODULE_STEM := $(LOCAL_INSTALLED_MODULE_STEM)
endif
例：
recovery模块编译recovery可执行文件：
LOCAL_INSTALLED_MODULE_STEM:=recovery
OVERRIDE_BUILT_MODULE_PATH
只有内部动态链接库模块可以使用OVERRIDE_BUILT_MODULE_PATH
OVERRIDE_BUILT_MODULE_PATH := $(strip $(OVERRIDE_BUILT_MODULE_PATH))
ifdef OVERRIDE_BUILT_MODULE_PATH
ifneq ($(LOCAL_MODULE_CLASS),SHARED_LIBRARIES)
$(error $(LOCAL_PATH): Illegal use of OVERRIDE_BUILT_MODULE_PATH)
endif
built_module_path := $(OVERRIDE_BUILT_MODULE_PATH)
else
built_module_path := $(intermediates)
endif
LOCAL_INSTALLED_MODULE
表示模块的安装路径+文件名，存放在安装目录
ifneq (true,$(LOCAL_UNINSTALLABLE_MODULE))
LOCAL_INSTALLED_MODULE := $(LOCAL_MODULE_PATH)/$(LOCAL_INSTALLED_MODULE_STEM)
endif
示例：
out/Cyanogenmod/target/product/m7ul/system/bin/recovery
LOCAL_UNINSTALLABLE_MODULE
表示该模块是否安装至手机，像sdk文档模块不会被安装至手机，
因此LOCAL_UNINSTALLABLE_MODULE为true
LOCAL_INTERMEDIATE_TARGETS
Assemble the list of targets to create PRIVATE_ variables for.
LOCAL_INTERMEDIATE_TARGETS += $(LOCAL_BUILT_MODULE)
LOCAL_UNSTRIPPED_PATH
没有strip的程序存放路径，通常放在symbols目录
Instructs the build system to put the unstripped version of the module somewhere
other than what's normal for its type.
Usually, you override this because you overrode LOCAL_MODULE_PATH for an executable or a shared
library.
If you overrode LOCAL_MODULE_PATH, but not LOCAL_UNSTRIPPED_PATH, an error will occur.
LOCAL_MODULE_CLASS
将用于决定编译时的中间文件存放的位置
LOCAL_MODULE_CLASS在定义目标生成方式的makefile文件里定义，
比如executable.mk里定义LOCAL_MODULE_CLASS := EXECUTABLES
在recovery模块的Android.mk里定义的LOCAL_MODULE_CLASS有：
LOCAL_MODULE_CLASS := RECOVERY_EXECUTABLES
LOCAL_MODULE_CLASS := UTILITY_EXECUTABLES
其它的LOCAL_MODULE_CLASS有
LOCAL_MODULE_CLASS := ETC
LOCAL_MODULE_CLASS := STATIC_LIBRARIES
LOCAL_MODULE_CLASS := EXECUTABLES
LOCAL_MODULE_CLASS := FAKE
LOCAL_MODULE_CLASS := JAVA_LIBRARIES
LOCAL_MODULE_CLASS := SHARED_LIBRARIES
LOCAL_MODULE_CLASS := APPS
对应 Cyanogenmod/target/product/m7ul/obj 的目录
比如说若 LOCAL_MODULE_CLASS := ETC
那么该模块编译的中间文件将存放于
Cyanogenmod/target/product/m7ul/obj/ETC
LOCAL_MODULE_SUFFIX
表示编译链接后的目标文件的后缀
LOCAL_PACKAGE_NAME
App名字
示例： Dialer, Contacts, etc.
This will probably change or go away when we switch to an ant-based build system for the apps.
LOCAL_OVERRIDES_PACKAGES
Some packages may override others using LOCAL_OVERRIDES_PACKAGE
示例：
packages/apps/DeskClock/Android.mk:13:LOCAL_OVERRIDES_PACKAGES := AlarmClock
LOCAL_EXPORT_PACKAGE_RESOURCES
若定义该变量，资源文件打包成一个apk
示例：
frameworks/base/core/res/Android.mk:34:LOCAL_EXPORT_PACKAGE_RESOURCES := true
LOCAL_MANIFEST_PACKAGE_NAME
在build/core/definitions.mk里inherit-package函数有用到LOCAL_MANIFEST_PACKAGE_NAME
LOCAL_REQUIRED_MODULES
本模块依赖的模块
Set LOCAL_REQUIRED_MODULES to any number of whitespace-separated module names, like "libblah" or
"Email".
If this module is installed, all of the modules that it requires will be installed as well.
This can be used to, e.g., ensure that necessary shared libraries
or providers are installed when a given app is installed
示例：
LOCAL_REQUIRED_MODULES += $(installed_shared_library_module_names)
LOCAL_ACP_UNAVAILABLE
示例：
build/tools/acp/Android.mk:23:LOCAL_ACP_UNAVAILABLE := true
LOCAL_MODULE_TAGS
模块的tag，为debug eng tests optional samples shell_ash shell_mksh等tag的组合，一个模块可有多个
Tag,
注意现在模块现在不能使用user作为模块的Tag,
以前如果使用user做为tag,那么这个模块将被自动安装，
如果想定义自动安装的模块，需要在PRODUCT_PACKAGES变量里添加该模块，
该变量在build/target/product/base.mk和build/target/product/core.mk里有赋值，这是所有产品都将继承
的基础配置
另外每个设备可在自己的产品配置文件device_*.mk里设置该变量，添加更多的模块
如果当前目录或者父目录有*_GPL*的文件，那么将自动添加gnu的tag
LOCAL_SRC_FILES
源代码文件集合
LOCAL_PREBUILT_OBJ_FILES
示例：
sdk/find_lock/Android.mk:50:LOCAL_PREBUILT_OBJ_FILES += images/$(FIND_LOCK_ICON_OBJ)
LOCAL_STATIC_JAVA_LIBRARIES
要链接的Java库，被链接的库将不会安装在手机上，因此会放到链接生成的java包里
示例：
packages/apps/Exchange/Android.mk:24:LOCAL_STATIC_JAVA_LIBRARIES := android-common
com.android.emailcommon
LOCAL_STATIC_LIBRARIES
表示模块要链接的静态库
ifneq (,$(filter libcutils libutils,$(LOCAL_STATIC_LIBRARIES)))
LOCAL_STATIC_LIBRARIES := $(call insert-liblog,$(LOCAL_STATIC_LIBRARIES))
endif
示例：external/busybox/Android.mk
LOCAL_STATIC_LIBRARIES := libcutils libc libm
最终：
LOCAL_STATIC_LIBRARIES := libcutils libc libm liblog
LOCAL_GROUP_STATIC_LIBRARIES
示例：
build/core/binary.mk:223:ifeq (true,$(LOCAL_GROUP_STATIC_LIBRARIES))
LOCAL_WHOLE_STATIC_LIBRARIES
链接时会将LOCAL_WHOLE_STATIC_LIBRARIES类型的静态链接库的所有目标代码放入最终目标文件里，而不去掉
These are the static libraries that you want to include in your module without allowing the linker
to remove dead code from them. This is mostly useful if you want to add a static library to a
shared library and have the static library's content exposed from the shared library.
ifneq (,$(filter libcutils libutils,$(LOCAL_WHOLE_STATIC_LIBRARIES)))
LOCAL_WHOLE_STATIC_LIBRARIES := $(call insert-liblog,$(LOCAL_WHOLE_STATIC_LIBRARIES))
endif
示例：
dalvik/vm/Android.mk
LOCAL_WHOLE_STATIC_LIBRARIES += libexpat libcutils libdex liblog libz
最终
LOCAL_WHOLE_STATIC_LIBRARIES += libexpat libcutils libdex liblog libz liblog
LOCAL_SHARED_LIBRARIES
表示模块要链接的动态链接库
ifneq (,$(filter libcutils libutils,$(LOCAL_SHARED_LIBRARIES)))
LOCAL_SHARED_LIBRARIES := $(call insert-liblog,$(LOCAL_SHARED_LIBRARIES))
endif
示例：frameworks/av/media/mtp模块
Android.mk LOCAL_SHARED_LIBRARIES := libutils libcutils libusbhost libbinder
最终：LOCAL_SHARED_LIBRARIES： libutils liblog libcutils libusbhost libbinder
LOCAL_IS_HOST_MODULE
表示该模块是否是将在主机上运行的模块
LOCAL_CC
你可以通过LOCAL_CC定义一个不同的C编译器
LOCAL_CXX
你可以通过LOCAL_CXX定义一个不同的C++编译器
LOCAL_CPP_EXTENSION
当前c++代码文件后缀
external/protobuf/Android.mk:177:LOCAL_CPP_EXTENSION := .cc
LOCAL_NO_DEFAULT_COMPILER_FLAGS
通常为C或者C++源代码文件的编译提供了默认的头文件目录和flag，可以通过
LOCAL_NO_DEFAULT_COMPILER_FLAGS设置不使用这些东东
LOCAL_NO_FDO_SUPPORT
示例：
build/core/binary.mk:136:ifeq ($(strip $(LOCAL_NO_FDO_SUPPORT)),)
LOCAL_ARM_MODE
示例：
ndk/tests/build/build-mode/jni/Android.mk:19:LOCAL_ARM_MODE := thumb
ndk/tests/build/build-mode/jni/Android.mk:32:LOCAL_ARM_MODE := arm
LOCAL_YACCFLAGS
Any flags to pass to invocations of yacc for your module.
A known limitation here is that the flags will be the same for all invocations of YACC for your
module.
This can be fixed. If you ever need it to be, just ask.
LOCAL_YACCFLAGS := -p kjsyy
LOCAL_ASFLAGS
Explicitly declare assembly-only __ASSEMBLY__ macro for
assembly source
LOCAL_ASFLAGS += -D__ASSEMBLY__
LOCAL_CFLAGS
表示编译C代码时用的参数
LOCAL_CPPFLAGS
编译C++代码使用的flag
./frameworks/av/media/libstagefright/Android.mk:78:LOCAL_CPPFLAGS += -DUSE_TI_CUSTOM_DOMX
LOCAL_RTTI_FLAG
编译C++代码使用rtti标记
./external/icu4c/common/Android.mk:135:LOCAL_RTTI_FLAG := -frtti
LOCAL_C_INCLUDES
编译C代码使用的头文件目录
LOCAL_EXPORT_C_INCLUDE_DIRS
示例：
system/core/libsuspend/Android.mk:18:LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
LOCAL_LDFLAGS
表示链接时用的参数
LOCAL_LDLIBS
额外的动态链接库
LOCAL_LDLIBS allows you to specify additional libraries that are not part of the build for your
executable or library.
Specify the libraries you want in -lxxx format; they're passed directly to the link line.
However, keep in mind that there will be no dependency generated for these libraries.
It's most useful in simulator builds where you want to use a library preinstalled on the host.
The linker (ld) is a particularly fussy beast,
so it's sometimes necessary to pass other flags here if you're doing something sneaky.
Some examples:
LOCAL_LDLIBS += -lcurses -lpthread
LOCAL_AAPT_FLAGS
使用aapt编译资源包时所用的flag
packages/apps/Calendar/Android.mk:35:LOCAL_AAPT_FLAGS := --auto-add-overlay
LOCAL_AAPT_INCLUDE_ALL_RESOURCES
使用AAPT编译时需用的一个标记，打包资源时会用到该比较
build/core/package.mk:391:ifeq ($(LOCAL_AAPT_INCLUDE_ALL_RESOURCES),true)
packages/inputmethods/LatinIME/java/Android.mk:37:LOCAL_AAPT_INCLUDE_ALL_RESOURCES := true
LOCAL_SYSTEM_SHARED_LIBRARIES
ifdef LOCAL_IS_HOST_MODULE
ifeq ($(LOCAL_SYSTEM_SHARED_LIBRARIES),none)
LOCAL_SYSTEM_SHARED_LIBRARIES :=
endif
else
ifeq ($(LOCAL_SYSTEM_SHARED_LIBRARIES),none)
LOCAL_SYSTEM_SHARED_LIBRARIES := $(TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES)
endif
endif
示例：
TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES：libc libstdc++ libm
LOCAL_SYSTEM_SHARED_LIBRARIES：libc libstdc++ libm
LOCAL_PREBUILT_LIBS
预编译好的库，当使用including $(BUILD_PREBUILT) or $(BUILD_HOST_PREBUILT)
会将LOCAL_PREBUILT_LIBS所指的库拷贝到安装目录
LOCAL_PREBUILT_EXECUTABLES
预编译好的可执行程序，一般通过include $(BUILD_PREBUILT)设置
会将预编译好的程序拷贝直接拷贝至安装目录
LOCAL_PREBUILT_JAVA_LIBRARIES
示例：
prebuilts/misc/common/kxml2/Android.mk:19:LOCAL_PREBUILT_JAVA_LIBRARIES := kxml2-2.3.0
$(COMMON_JAVA_PACKAGE_SUFFIX)
LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES
示例：
packages/apps/CMUpdater/Android.mk:39:LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES :=
dashclockapi:libs/dashclock-api-r1.1.jar
LOCAL_PREBUILT_STRIP_COMMENTS
示例：
build/core/prebuilt.mk:52: ifneq ($(LOCAL_PREBUILT_STRIP_COMMENTS),)
LOCAL_INTERMEDIATE_SOURCES
示例：
frameworks/base/Android.mk:249:LOCAL_INTERMEDIATE_SOURCES := \
LOCAL_INTERMEDIATE_SOURCE_DIR
表示编译生成的源文件存放目录
LOCAL_INTERMEDIATE_SOURCE_DIR := $(intermediates.COMMON)/src
例：out/target/common/obj/EXECUTABLES/recovery_intermediates/src
LOCAL_JAVACFLAGS
If you have additional flags to pass into the javac compiler, add them here. For example:
LOCAL_JAVACFLAGS += -Xlint:deprecation
LOCAL_JAVA_LIBRARIES
当链接java app程序和库时， LOCAL_JAVA_LIBRARIES指定了哪些java类将被包含，
目前只有 LOCAL_JAVA_LIBRARIES := core framework
注意目前编译app设置LOCAL_JAVA_LIBRARIES是不必要的，也不被允许的，在include $(BUILD_PACKAGE)时
合适的库都会被包含进来
LOCAL_NO_STANDARD_LIBRARIES
示例：
frameworks/base/Android.mk:254:LOCAL_NO_STANDARD_LIBRARIES := true
LOCAL_CLASSPATH
示例：
external/javassist/Android.mk:21:LOCAL_CLASSPATH := $(HOST_JDK_TOOLS_JAR)
LOCAL_DROIDDOC_USE_STANDARD_DOCLET
示例：
device/sample/frameworks/PlatformLibrary/Android.mk:48:LOCAL_DROIDDOC_USE_STANDARD_DOCLET := true
LOCAL_DROIDDOC_SOURCE_PATH
示例：
build/core/droiddoc.mk:40:LOCAL_DROIDDOC_SOURCE_PATH := $(LOCAL_PATH)
LOCAL_DROIDDOC_TEMPLATE_DIR
暂时未见用到
LOCAL_DROIDDOC_CUSTOM_TEMPLATE_DIR
示例：
frameworks/base/Android.mk:591:LOCAL_DROIDDOC_CUSTOM_TEMPLATE_DIR:=build/tools/droiddoc/templates
-sdk
LOCAL_DROIDDOC_ASSET_DIR
示例：
build/core/droiddoc.mk:143:$(full_target): PRIVATE_OUT_ASSET_DIR := $(out_dir)/
$(LOCAL_DROIDDOC_ASSET_DIR)
LOCAL_DROIDDOC_CUSTOM_ASSET_DIR
示例：
build/tools/droiddoc/test/stubs/Android.mk:25:LOCAL_DROIDDOC_CUSTOM_ASSET_DIR:=assets-google
LOCAL_DROIDDOC_OPTIONS
示例：
device/sample/frameworks/PlatformLibrary/Android.mk:46:LOCAL_DROIDDOC_OPTIONS :=
com.example.android.platform_library
LOCAL_DROIDDOC_HTML_DIR
示例：
frameworks/base/Android.mk:429:framework_docs_LOCAL_DROIDDOC_HTML_DIR := docs/html
LOCAL_ASSET_FILES
编译Android Package(app)程序时，通常用LOCAL_ASSET_FILES，表示assets目录的所有文件
通常使用方式：
LOCAL_ASSET_FILES += $(call find-subdir-assets)
LOCAL_ASSET_DIR
编译Android Package(app)程序时，通常用LOCAL_ASSET_FILES，表示assets目录的所有文件
通常使用方式：
LOCAL_ASSET_FILES += $(call find-subdir-assets)
LOCAL_RESOURCE_DIR
示例：
packages/apps/Gallery2/Android.mk:59:LOCAL_RESOURCE_DIR += $(LOCAL_PATH)/res
LOCAL_JAVA_RESOURCE_DIRS
示例：
frameworks/base/tools/layoutlib/bridge/Android.mk:20:LOCAL_JAVA_RESOURCE_DIRS := resources
LOCAL_JAVA_RESOURCE_FILES
示例：
frameworks/base/Android.mk:261:LOCAL_JAVA_RESOURCE_FILES += $(LOCAL_PATH)/preloaded-classes
LOCAL_GENERATED_SOURCES
编译时生成的源代码文件，像aidl将转为java代码
LOCAL_COPY_HEADERS_TO
需要拷贝头头文件至哪个安装目录
LOCAL_COPY_HEADERS
需要拷贝至安装目录的头文件集合，你需要同时定义LOCAL_COPY_HEADERS_TO
LOCAL_FORCE_STATIC_EXECUTABLE
强制编译为静态可执行文件，这样在执行时不会去查找动态链接库
一般只有安装在sbin目录下的可执行文件使用该变量
如果想程序在recovery下运行，一般都需要添加该变量
示例：
LOCAL_FORCE_STATIC_EXECUTABLE := true
LOCAL_ADDITIONAL_DEPENDENCIES
额外的依赖
If your module needs to depend on anything else that isn't actually built in to it,
you can add those make targets to LOCAL_ADDITIONAL_DEPENDENCIES.
Usually this is a workaround for some other dependency that isn't created automatically.
LOCAL_ENABLE_APROF
编译动态链接库时用到
LOCAL_ENABLE_APROF_JNI
示例：
build/core/shared_library.mk:26:ifeq ($(strip $(LOCAL_ENABLE_APROF_JNI)),true)
LOCAL_COMPRESS_MODULE_SYMBOLS
暂未见赋值之处
示例：
build/core/dynamic_binary.mk:74:ifeq ($(LOCAL_COMPRESS_MODULE_SYMBOLS),true)
LOCAL_STRIP_MODULE
表示该模块生成的目标是否需要被strip
Calculated in base_rules.make to determine if this module should actually be stripped or not,
based on whether LOCAL_STRIPPABLE_MODULE is set, and whether the combo is configured to ever
strip modules.
With Iliyan's stripping tool, this might change.
LOCAL_JNI_SHARED_LIBRARIES
示例：
packages/inputmethods/LatinIME/java/Android.mk:27:LOCAL_JNI_SHARED_LIBRARIES := libjni_latinime
LOCAL_JNI_SHARED_LIBRARIES_ABI
暂未见赋值之处
示例：
build/core/package.mk:346: jni_shared_libraries_abi := $(LOCAL_JNI_SHARED_LIBRARIES_ABI)
LOCAL_JAR_MANIFEST
示例：
cts/tools/dasm/src/Android.mk:24:LOCAL_JAR_MANIFEST := ../etc/manifest.txt
LOCAL_INSTRUMENTATION_FOR
示例：
packages/apps/Gallery/tests/Android.mk:15:LOCAL_INSTRUMENTATION_FOR := Gallery
LOCAL_MANIFEST_INSTRUMENTATION_FOR
示例：
build/core/definitions.mk:2046: $(call keep-or-
override,LOCAL_MANIFEST_INSTRUMENTATION_FOR,$(patsubst &&%,%,$(word 7,$(_o)))) \
LOCAL_AIDL_INCLUDES
示例：
build/core/base_rules.mk:185:LOCAL_AIDL_INCLUDES += $(FRAMEWORKS_BASE_JAVA_SRC_DIRS)
LOCAL_JARJAR_RULES
示例：
frameworks/base/Android.mk:263:#LOCAL_JARJAR_RULES := $(LOCAL_PATH)/jarjar-rules.txt
build/core/java.mk:281:$(full_classes_jarjar_jar): PRIVATE_JARJAR_RULES := $(LOCAL_JARJAR_RULES)
LOCAL_ADDITIONAL_JAVA_DIR
示例：
frameworks/base/Android.mk:738:LOCAL_ADDITIONAL_JAVA_DIR:=$(framework_docs_LOCAL_ADDITIONAL_JAVA_D
IR)
LOCAL_ALLOW_UNDEFINED_SYMBOLS
示例：
bionic/libthread_db/Android.mk:27:LOCAL_ALLOW_UNDEFINED_SYMBOLS := false
LOCAL_DX_FLAGS
用dx处理jar代码的flag
LOCAL_CERTIFICATE
签名用的证书
./device/samsung/galaxys2-common/DeviceSettings/Android.mk:11:LOCAL_CERTIFICATE := platform
LOCAL_SDK_VERSION
build/core/java.mk里定义该变量
LOCAL_SDK_VERSION := $(PDK_BUILD_SDK_VERSION)
如果定义了LOCAL_SDK_VERSION，那么需要定义ndk编译相关变量
因为编译app时，常需要编译jni代码
示例：LOCAL_SDK_VERSION: 9
LOCAL_SDK_RES_VERSION
./build/core/static_java_library.mk:62:LOCAL_SDK_RES_VERSION:=$(strip $(LOCAL_SDK_RES_VERSION))
LOCAL_NDK_STL_VARIANT
./packages/inputmethods/LatinIME/native/jni/Android.mk:97:LOCAL_NDK_STL_VARIANT := stlport_static
LOCAL_EMMA_INSTRUMENT
使用emma进行覆盖代码测试
./build/core/java_library.mk:54:LOCAL_EMMA_INSTRUMENT := false
LOCAL_PROGUARD_ENABLED
是否启用混淆
LOCAL_PROGUARD_FLAGS
混淆使用的flag
LOCAL_PROGUARD_FLAG_FILES
混淆使用的flag文件
LOCAL_EMMA_COVERAGE_FILTER
示例：
packages/apps/Browser/Android.mk:20:LOCAL_EMMA_COVERAGE_FILTER := *,-com.android.common.*
LOCAL_WARNINGS_ENABLE
示例：
build/core/definitions.mk:1468: $(if $(findstring
true,$(LOCAL_WARNINGS_ENABLE)),$(xlint_unchecked),) \
LOCAL_FULL_MANIFEST_FILE
示例：
build/core/package.mk:63:LOCAL_FULL_MANIFEST_FILE := $(LOCAL_PATH)/$(LOCAL_MANIFEST_FILE)
LOCAL_MANIFEST_FILE
示例：
build/core/package.mk:57:LOCAL_MANIFEST_FILE := AndroidManifest.xml
LOCAL_RENDERSCRIPT_INCLUDES
示例：
frameworks/base/tests/RenderScriptTests/ImageProcessing2/Android.mk:30:LOCAL_RENDERSCRIPT_INCLUDES
_OVERRIDE := $(TOPDIR)external/clang/lib/Headers \
LOCAL_RENDERSCRIPT_INCLUDES_OVERRIDE
示例：
frameworks/base/tests/RenderScriptTests/ImageProcessing2/Android.mk:30:LOCAL_RENDERSCRIPT_INCLUDES
_OVERRIDE := $(TOPDIR)external/clang/lib/Headers \
LOCAL_RENDERSCRIPT_CC
示例：
build/core/java.mk:161:LOCAL_RENDERSCRIPT_CC := $(LLVM_RS_CC)
LOCAL_RENDERSCRIPT_FLAGS
示例：
frameworks/base/tests/RenderScriptTests/ImageProcessing2/Android.mk:33:LOCAL_RENDERSCRIPT_FLAGS
:= -rs-package-name=android.support.v8.renderscript
LOCAL_RENDERSCRIPT_TARGET_API
示例：
frameworks/base/tests/RenderScriptTests/ImageProcessing2/Android.mk:29:LOCAL_RENDERSCRIPT_TARGET_A
PI := 17
LOCAL_BUILD_HOST_DEX
示例：
libcore/JavaLibrary.mk:137:LOCAL_BUILD_HOST_DEX := true
LOCAL_DEX_PREOPT
如果编译模式选择的是user或者userdebug，那么LOCAL_DEX_PREOPT默认为true，这样资源apk和代码文件分离
成为odex
build/core/package.mk:156:LOCAL_DEX_PREOPT := true
LOCAL_PROTOC_OPTIMIZE_TYPE
示例：
hardware/ril/mock-ril/Android.mk:57:LOCAL_PROTOC_OPTIMIZE_TYPE := full
LOCAL_PROTOC_FLAGS
编译.proto文件使用的flag，暂未见赋值
build/core/binary.mk:291:$(proto_generated_cc_sources): PRIVATE_PROTOC_FLAGS :=
$(LOCAL_PROTOC_FLAGS)
LOCAL_NO_CRT
示例：
bionic/linker/Android.mk:70:LOCAL_NO_CRT := true
LOCAL_PROPRIETARY_MODULE
是否是设备专有模块
LOCAL_MODULE_OWNER
示例：
vendor/samsung/galaxys2-common/proprietary/Android.mk:21:LOCAL_MODULE_OWNER := samsung
LOCAL_CTS_TEST_PACKAGE
示例：
cts/tests/uiautomator/Android.mk:29:LOCAL_CTS_TEST_PACKAGE := android.uiautomator
LOCAL_CTS_TEST_RUNNER
示例：
cts/tests/tests/accessibilityservice/Android.mk:32:LOCAL_CTS_TEST_RUNNER :=
com.android.cts.tradefed.testtype.AccessibilityServiceTestRunner
LOCAL_CLANG
表示编译C代码
LOCAL_ADDRESS_SANITIZER
地址对齐
LOCAL_JAR_EXCLUDE_FILES
示例：
build/core/static_java_library.mk:44:LOCAL_JAR_EXCLUDE_FILES :=
$(ANDROID_RESOURCE_GENERATED_CLASSES)
LOCAL_LINT_FLAGS
暂未见赋值之处
LOCAL_SOURCE_FILES_ALL_GENERATED
LOCAL_SOURCE_FILES_ALL_GENERATED is set only if the module does not have static source files,
but generated source files in its LOCAL_INTERMEDIATE_SOURCE_DIR
You have to set up the dependency in some other way.
LOCAL_DONT_DELETE_JAR_META_INF
示例：
cts/tests/core/ctscore.mk:24:LOCAL_DONT_DELETE_JAR_META_INF := true
build/core/java.mk:263:$(full_classes_compiled_jar): PRIVATE_DONT_DELETE_JAR_META_INF :=
$(LOCAL_DONT_DELETE_JAR_META_INF)