定义了将asm,c,cpp,yacc,lex源代码编译为目标文件的基本规则
模块想生成某类型目标时不会直接包含该makefile,但如果生成二进制程序,会间接包含该makefile
dynamic_binary.mk,executable.mk,host_executable.mk,host_shared_library.mk
host_static_library.mk,prebuilt.mk,raw_executable.mk,shared_library.mk,static_library.mk
等makefile都会包含binary.mk
所有的目标文件将添加到$(all_objects)变量里
不知道
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,那么不能定义LOCAL_NDK_VERSION,否则会提示LOCAL_NDK_VERSION is now retired
如果定义了LOCAL_SDK_VERSION,那么不能定义LOCAL_IS_HOST_MODULE,否则提示LOCAL_SDK_VERSION cannot be used in host module
因为编译app时,常需要编译jni代码
示例:LOCAL_SDK_VERSION: 9
ndk的路径,在config.mk里定义:
HISTORICAL_NDK_VERSIONS_ROOT := $(TOPDIR)prebuilts/ndk
即prebuilts/ndk
my_ndk_source_root := $(HISTORICAL_NDK_VERSIONS_ROOT)/current/sources
示例:HISTORICAL_NDK_VERSIONS_ROOT: prebuilts/ndk
示例: my_ndk_source_root : prebuilts/ndk/current/sources
my_ndk_version_root := $(HISTORICAL_NDK_VERSIONS_ROOT)/current/platforms/android-$(LOCAL_SDK_VERSION)/arch-$(TARGET_ARCH)
示例:
my_ndk_source_root : prebuilts/ndk/current/current
示例:
LOCAL_NDK_STL_VARIANT := system
示例:prebuilts/ndk/current/sources/cxx-stl/system/include
示例:
prebuilts/ndk/cxx-stl/stlport/libs/armeabi-v7a/libstlport_static.a
示例:
my_ndk_stl_shared_lib := -lstlport_shared
示例:prebuilts/ndk/current/sources/cxx-stl/stlport/libs/armeabi-v7a/libstlport_static.a
ifdef LOCAL_IS_HOST_MODULE
ifeq ($(LOCAL_SYSTEM_SHARED_LIBRARIES),none)
LOCAL_SYSTEM_SHARED_LIBRARIES :=
endif
else
ifeq ($(LOCAL_SYSTEM_SHARED_LIBRARIES),none)
LOCAL_SYSTEM_SHARED_LIBRARIES := $(TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES)
endif
endif
示例:
TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES:libc libstdc++ libm
LOCAL_SYSTEM_SHARED_LIBRARIES:libc libstdc++ libm
使得包含了libcutils或者libutils的模块,也包含liblog,并使得liblog排在前面
表示模块要链接的动态链接库
ifneq (,$(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
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
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
安装的动态链接库名字,用于定义依赖的动态链接库
ifdef LOCAL_SDK_VERSION
# Get the list of INSTALLED libraries as module names.
# We cannot compute the full path of the LOCAL_SHARED_LIBRARIES for
# they may cusomize their install path with LOCAL_MODULE_PATH
installed_shared_library_module_names := \
$(LOCAL_SHARED_LIBRARIES)
else
installed_shared_library_module_names := \
$(LOCAL_SYSTEM_SHARED_LIBRARIES) $(LOCAL_SHARED_LIBRARIES)
Used while building the base libraries: libc, libm, libdl.
Usually it should be set to "none," as it is in $(CLEAR_VARS).
When building these libraries, it's set to the ones they link against. For example, libc, libstdc++ and libdl don't link against anything, and libm links against libc. Normally, when the value is none, these libraries are automatically linked in to executables and libraries,
so you don't need to specify them manually.
示例:
libc libstdc++ libm
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)
表示编译C代码
表示编译C代码时用的参数
表示链接时用的参数
地址对齐
C编译器
CLANG := $(HOST_OUT_EXECUTABLES)/clang$(HOST_EXECUTABLE_SUFFIX)
C++编译器
CLANG_CXX := $(HOST_OUT_EXECUTABLES)/clang++$(HOST_EXECUTABLE_SUFFIX)
编译动态链接库时用到
Explicitly declare assembly-only __ASSEMBLY__ macro for
assembly source
LOCAL_ASFLAGS += -D__ASSEMBLY__
编译动态链接库时用,
LOCAL_INTERMEDIATE_TARGETS := $(linked_module)
编译时生成的源代码文件,像aidl将专为java代码
定义了将.proto编译为.cc的目标
定义了将 proto代码编译后的c代码编译为目标文件的目标
利用yacc将.y文件编译为.cpp文件
将.y文件编译的.cpp文件编译为目标文件
利用lex将.l文件编译为.cpp文件
利用lex将lex编译出来的.cpp编译为目标文件
将cpp编译为目标文件
将生成的Cpp编译为目标文件
将汇编代码.s,.S编译为目标文件
将c代码编译为目标文件
将生成的C文件编译为目标文件
将objectc代码(以.m结尾)编译为目标文件
将汇编代码编译[.S]为目标文件
将汇编代码编译[.s]为目标文件
需要include的头文件
内容示例:-I system/core/fs_mgr/include
要编译的目标集合
some rules depend on asm_objects being first. If your code depends on
being first, it's reasonable to require it to be assembly.
all_objects := \
$(asm_objects) \
$(cpp_objects) \
$(gen_cpp_objects) \
$(gen_asm_objects) \
$(c_objects) \
$(gen_c_objects) \
$(objc_objects) \
$(yacc_objects) \
$(lex_objects) \
$(proto_generated_objects) \
$(addprefix $(TOPDIR)$(LOCAL_PATH)/,$(LOCAL_PREBUILT_OBJ_FILES))
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
需要拷贝头头文件至哪个安装目录
你可以通过LOCAL_CC定义一个不同的C编译器
你可以通过LOCAL_CXX定义一个不同的C++编译器
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)
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
额外的编译java用的flags
示例:
LOCAL_JAVACFLAGS += -Xlint:deprecation
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
额外的链接flag
记住 flag的顺序很重要,需要在所有平台都测试,否则容易出错
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_LDLIBS += -Wl,-z,origin
如果你的packege没有manifest,可以设置LOCAL_NO_MANIFEST:=true
一般资源包会这么做
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.
你可以为主机上的可执行程序添加一条命令,这条命令在这个模块被链接后执行
You might have to go through some contortions to get variables right because of early or late variable evaluation:
module := $(HOST_OUT_EXECUTABLES)/$(LOCAL_MODULE)
LOCAL_POST_PROCESS_COMMAND := /Developer/Tools/Rez -d __DARWIN__ -t APPL\
-d __WXMAC__ -o $(module) Carbon.r
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
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
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.
表示模块生成后的程序安装路径,设置该变量后,必须设置LOCAL_UNSTRIPPED_PATH,如果是预编译的类型,则不用设置
Instructs the build system to put the module somewhere other than what's normal for its type.
If you override this, make sure you also set LOCAL_UNSTRIPPED_PATH
if it's an executable or a shared library so the unstripped binary has somewhere to go.
An error will occur if you forget to.
额外的yacc编译器flag
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
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.
表示编译链接后的目标文件(文件路径+文件名),存放在临时目录
When a module is built, the module is created in an intermediate directory then copied to its final location.
LOCAL_BUILT_MODULE is the full path to the intermediate file.
See LOCAL_INSTALLED_MODULE for the path to the final installed location of the module.
表示是在模块生成的文件是在主机上的程序
Set by the host_xxx.make includes to tell base_rules.make
and the other includes that we're building for the host.
Kenneth did this as part of openbinder, and I would like to clean it up so the rules,
includes and definitions aren't duplicated for host and target.
表示模块的安装路径+文件名,存放在安装目录
The fully qualified path name of the final location of the module.
See LOCAL_BUILT_MODULE for the location of the intermediate file that the make rules should actually be constructing.
Used in some stuff remaining from the openbinder for building scripts with particular values set,
Used in some stuff remaining from the openbinder build system that we might find handy some day.
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.
表示模块生成的文件是否能被Strip,只有可执行程序和动态链接库可以被strip
Set by the include makefiles if that type of module is strippable.
Executables and shared libraries are.
all_libraries is used for the dependencies on LOCAL_BUILT_MODULE.