Android編譯系統參考手冊

build/core/clear_vars.mk
Clear out values of all variables used by rule templates
清除LOCAL變量，每個模塊的Android.mk，一般會先包含該文件
變量定義主要出現在base_rules.mk，config.mk，definitions.mk
LOCAL_MODULE
LOCAL_MODULE表示模塊的名稱
   LOCAL_MODULE將在每個模塊的makefile里定義，如果未定義，編譯系統會報錯
LOCAL_MODULE_PATH
表示模塊編譯結果將要存放的目錄
    recovery模塊的Android.mk里有
    LOCAL_MODULE := nandroid-md5.sh 
    LOCAL_MODULE_PATH := $(TARGET_RECOVERY_ROOT_OUT)/sbin 
    說明：nandroid-md5.sh 將存放於out/Cyanogenmod/target/product/m7ul/recovery/root/sbin
    如果模塊的Android.mk里未定義LOCAL_MODULE_PATH
    那么LOCAL_MODULE_PATH := $($(my_prefix)OUT$(partition_tag)_$(LOCAL_MODULE_CLASS))
    在recovery模塊里recovery可執行文件相關變量如下：
    比如my_prefix為TARGET_，partition_tag為空,LOCAL_MODULE_CLASS為EXECUTABLES
    那么LOCAL_MODULE_PATH為$(TARGET_OUT_EXECUTABLES)，
    值應該為
    out/Cyanogenmod/target/product/m7ul/system/bin
LOCAL_MODULE_STEM
表示編譯鏈接后的目標文件的文件名，不帶后綴
     LOCAL_MODULE_STEM := $(strip $(LOCAL_MODULE_STEM))
 ifeq ($(LOCAL_MODULE_STEM),)
     LOCAL_MODULE_STEM := $(LOCAL_MODULE)
 endif
 例：
   recovery模塊編譯recovery可執行文件：
   LOCAL_MODULE_STEM:=recovery
LOCAL_DONT_CHECK_MODULE
如果定義了該變量，那么模塊將不被檢查
ifdef LOCAL_DONT_CHECK_MODULE
  LOCAL_CHECKED_MODULE :=
endif
LOCAL_CHECKED_MODULE
需要檢查的模塊 
ifndef LOCAL_CHECKED_MODULE
  ifndef LOCAL_SDK_VERSION
    LOCAL_CHECKED_MODULE := $(LOCAL_BUILT_MODULE)
  endif
endif
LOCAL_BUILT_MODULE
表示編譯鏈接后的目標文件(文件路徑+文件名)
  LOCAL_BUILT_MODULE := $(built_module_path)/$(LOCAL_BUILT_MODULE_STEM)
  比如recovery:
  LOCAL_BUILT_MODULE 路徑；
  out/Cyanogenmod/target/product/m7ul/obj/EXECUTABLES/recovery_intermediates/recovery
LOCAL_BUILT_MODULE_STEM
表示編譯鏈接后的目標文件的文件名，帶后綴
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模塊編譯recovery可執行文件：
LOCAL_INSTALLED_MODULE_STEM:=recovery
OVERRIDE_BUILT_MODULE_PATH
只有內部動態鏈接庫模塊可以使用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 := $(intermediates)
endif
LOCAL_INSTALLED_MODULE
表示模塊的安裝路徑+文件名，存放在安裝目錄
ifneq (true,$(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
表示該模塊是否安裝至手機，像sdk文檔模塊不會被安裝至手機，
 因此LOCAL_UNINSTALLABLE_MODULE為true
LOCAL_INTERMEDIATE_TARGETS
Assemble the list of targets to create PRIVATE_ variables for.
LOCAL_INTERMEDIATE_TARGETS += $(LOCAL_BUILT_MODULE)
LOCAL_UNSTRIPPED_PATH
沒有strip的程序存放路徑，通常放在symbols目錄
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
將用於決定編譯時的中間文件存放的位置
LOCAL_MODULE_CLASS在定義目標生成方式的makefile文件里定義，
  比如executable.mk里定義LOCAL_MODULE_CLASS := EXECUTABLES
在recovery模塊的Android.mk里定義的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
對應 Cyanogenmod/target/product/m7ul/obj 的目錄 
  比如說若 LOCAL_MODULE_CLASS := ETC 
  那么該模塊編譯的中間文件將存放於
  Cyanogenmod/target/product/m7ul/obj/ETC
LOCAL_MODULE_SUFFIX
表示編譯鏈接后的目標文件的后綴
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
若定義該變量，資源文件打包成一個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函數有用到LOCAL_MANIFEST_PACKAGE_NAME 
LOCAL_REQUIRED_MODULES
本模塊依賴的模塊
 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
模塊的tag，為debug eng tests optional samples shell_ash shell_mksh等tag的組合，一個模塊可有多個


Tag,
注意現在模塊現在不能使用user作為模塊的Tag,
  以前如果使用user做為tag,那么這個模塊將被自動安裝，
  如果想定義自動安裝的模塊，需要在PRODUCT_PACKAGES變量里添加該模塊，
  該變量在build/target/product/base.mk和build/target/product/core.mk里有賦值，這是所有產品都將繼承


的基礎配置
  另外每個設備可在自己的產品配置文件device_*.mk里設置該變量，添加更多的模塊 
如果當前目錄或者父目錄有*_GPL*的文件，那么將自動添加gnu的tag
LOCAL_SRC_FILES
源代碼文件集合
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
要鏈接的Java庫，被鏈接的庫將不會安裝在手機上，因此會放到鏈接生成的java包里
示例：
 packages/apps/Exchange/Android.mk:24:LOCAL_STATIC_JAVA_LIBRARIES := android-common 


com.android.emailcommon
LOCAL_STATIC_LIBRARIES
表示模塊要鏈接的靜態庫
   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
  最終：
     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
鏈接時會將LOCAL_WHOLE_STATIC_LIBRARIES類型的靜態鏈接庫的所有目標代碼放入最終目標文件里，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
最終
 LOCAL_WHOLE_STATIC_LIBRARIES += libexpat libcutils libdex liblog libz liblog
LOCAL_SHARED_LIBRARIES
表示模塊要鏈接的動態鏈接庫
  ifneq (,$(filter libcutils libutils,$(LOCAL_SHARED_LIBRARIES)))
  LOCAL_SHARED_LIBRARIES := $(call insert-liblog,$(LOCAL_SHARED_LIBRARIES))
  endif  
示例：frameworks/av/media/mtp模塊
Android.mk LOCAL_SHARED_LIBRARIES := libutils libcutils libusbhost libbinder
最終：LOCAL_SHARED_LIBRARIES： libutils liblog libcutils libusbhost libbinder  
LOCAL_IS_HOST_MODULE
表示該模塊是否是將在主機上運行的模塊
LOCAL_CC
你可以通過LOCAL_CC定義一個不同的C編譯器
LOCAL_CXX
你可以通過LOCAL_CXX定義一個不同的C++編譯器
LOCAL_CPP_EXTENSION
當前c++代碼文件后綴
external/protobuf/Android.mk:177:LOCAL_CPP_EXTENSION := .cc
LOCAL_NO_DEFAULT_COMPILER_FLAGS
通常為C或者C++源代碼文件的編譯提供了默認的頭文件目錄和flag，可以通過


LOCAL_NO_DEFAULT_COMPILER_FLAGS設置不使用這些東東
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
表示編譯C代碼時用的參數
LOCAL_CPPFLAGS
編譯C++代碼使用的flag
 ./frameworks/av/media/libstagefright/Android.mk:78:LOCAL_CPPFLAGS += -DUSE_TI_CUSTOM_DOMX
LOCAL_RTTI_FLAG
編譯C++代碼使用rtti標記
./external/icu4c/common/Android.mk:135:LOCAL_RTTI_FLAG := -frtti
LOCAL_C_INCLUDES
編譯C代碼使用的頭文件目錄
LOCAL_EXPORT_C_INCLUDE_DIRS
示例：
system/core/libsuspend/Android.mk:18:LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
LOCAL_LDFLAGS
表示鏈接時用的參數
LOCAL_LDLIBS
額外的動態鏈接庫
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編譯資源包時所用的flag
packages/apps/Calendar/Android.mk:35:LOCAL_AAPT_FLAGS := --auto-add-overlay
LOCAL_AAPT_INCLUDE_ALL_RESOURCES
使用AAPT編譯時需用的一個標記，打包資源時會用到該比較
 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
預編譯好的庫，當使用including $(BUILD_PREBUILT) or $(BUILD_HOST_PREBUILT)
會將LOCAL_PREBUILT_LIBS所指的庫拷貝到安裝目錄
LOCAL_PREBUILT_EXECUTABLES
預編譯好的可執行程序，一般通過include $(BUILD_PREBUILT)設置
會將預編譯好的程序拷貝直接拷貝至安裝目錄
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
表示編譯生成的源文件存放目錄
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
當鏈接java app程序和庫時， LOCAL_JAVA_LIBRARIES指定了哪些java類將被包含，
目前只有 LOCAL_JAVA_LIBRARIES := core framework
注意目前編譯app設置LOCAL_JAVA_LIBRARIES是不必要的，也不被允許的，在include  $(BUILD_PACKAGE)時
合適的庫都會被包含進來
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
暫時未見用到
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
編譯Android Package(app)程序時，通常用LOCAL_ASSET_FILES，表示assets目錄的所有文件
通常使用方式：
LOCAL_ASSET_FILES += $(call find-subdir-assets)   
LOCAL_ASSET_DIR
編譯Android Package(app)程序時，通常用LOCAL_ASSET_FILES，表示assets目錄的所有文件
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 += $(LOCAL_PATH)/preloaded-classes
LOCAL_GENERATED_SOURCES
編譯時生成的源代碼文件，像aidl將轉為java代碼
LOCAL_COPY_HEADERS_TO
需要拷貝頭頭文件至哪個安裝目錄
LOCAL_COPY_HEADERS
需要拷貝至安裝目錄的頭文件集合，你需要同時定義LOCAL_COPY_HEADERS_TO 
LOCAL_FORCE_STATIC_EXECUTABLE
強制編譯為靜態可執行文件，這樣在執行時不會去查找動態鏈接庫
一般只有安裝在sbin目錄下的可執行文件使用該變量
如果想程序在recovery下運行，一般都需要添加該變量
示例：
   LOCAL_FORCE_STATIC_EXECUTABLE := true
LOCAL_ADDITIONAL_DEPENDENCIES
額外的依賴
If your module needs to depend on anything else that isn't actually built in to it,
you can add those make targets to LOCAL_ADDITIONAL_DEPENDENCIES. 
Usually this is a workaround for some other dependency that isn't created automatically.
LOCAL_ENABLE_APROF
編譯動態鏈接庫時用到
LOCAL_ENABLE_APROF_JNI
示例：
  build/core/shared_library.mk:26:ifeq ($(strip $(LOCAL_ENABLE_APROF_JNI)),true)
LOCAL_COMPRESS_MODULE_SYMBOLS
暫未見賦值之處
示例：
build/core/dynamic_binary.mk:74:ifeq ($(LOCAL_COMPRESS_MODULE_SYMBOLS),true)
LOCAL_STRIP_MODULE
表示該模塊生成的目標是否需要被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
暫未見賦值之處 
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處理jar代碼的flag
LOCAL_CERTIFICATE
簽名用的證書
./device/samsung/galaxys2-common/DeviceSettings/Android.mk:11:LOCAL_CERTIFICATE := platform
LOCAL_SDK_VERSION
build/core/java.mk里定義該變量
LOCAL_SDK_VERSION := $(PDK_BUILD_SDK_VERSION)
如果定義了LOCAL_SDK_VERSION，那么需要定義ndk編譯相關變量
因為編譯app時，常需要編譯jni代碼
示例：LOCAL_SDK_VERSION: 9
LOCAL_SDK_RES_VERSION
./build/core/static_java_library.mk:62:LOCAL_SDK_RES_VERSION:=$(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進行覆蓋代碼測試
 ./build/core/java_library.mk:54:LOCAL_EMMA_INSTRUMENT := false
LOCAL_PROGUARD_ENABLED
是否啟用混淆
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
如果編譯模式選擇的是user或者userdebug，那么LOCAL_DEX_PREOPT默認為true，這樣資源apk和代碼文件分離
成為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
編譯.proto文件使用的flag，暫未見賦值
 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
是否是設備專有模塊
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
表示編譯C代碼
LOCAL_ADDRESS_SANITIZER
地址對齊
LOCAL_JAR_EXCLUDE_FILES
示例：
     build/core/static_java_library.mk:44:LOCAL_JAR_EXCLUDE_FILES := 


$(ANDROID_RESOURCE_GENERATED_CLASSES)
LOCAL_LINT_FLAGS
暫未見賦值之處
LOCAL_SOURCE_FILES_ALL_GENERATED
LOCAL_SOURCE_FILES_ALL_GENERATED is set only if the module does not have static source files,
but generated source files in its LOCAL_INTERMEDIATE_SOURCE_DIR
You have to set up the dependency in some other way.
LOCAL_DONT_DELETE_JAR_META_INF
示例：
  cts/tests/core/ctscore.mk:24:LOCAL_DONT_DELETE_JAR_META_INF := true
  build/core/java.mk:263:$(full_classes_compiled_jar): PRIVATE_DONT_DELETE_JAR_META_INF := 


$(LOCAL_DONT_DELETE_JAR_META_INF)