android makefile

build环境配置：

    可以通过设定环境变量进行配置，也可以通过修改build/buildspec.mk配置，参考build/buildspec.mk.default

 

CUSTOM_MODULES

    可以安装的MODULES，被安装在/system

 

 

## user/userdebug ##

    if TARGET_BUILD_VARIANT == user

        tags_to_install = user

    if TARGET_BUILD_VARIANT == userdebug

        tags_to_install = user + debug and enable_target_debugging = true

 

## eng ##

    if TARGET_BUILD_VARIANT == eng

        tags_to_install = user + debug + eng

 

## tests ##

    if TARGET_BUILD_VARIANT == tests

        tags_to_install = user + debug + eng + tests

 

## sdk ##

Build sdk:

    if MAKECMDGOALS == sdk or win_sdk or sdk_addon

        is_sdk_build = true

    if is_sdk_build == true

        tags_to_install = user + debug + eng

 

 

 

 

 # build the full stagefright library
 ifneq ($(strip BUILD_WITH_FULL_STAGEFRIGHT),)
 BUILD_WITH_FULL_STAGEFRIGHT := true
 endif

 

 

# If we're on an eng or tests build, but not on the sdk, and we have a better one, use that instead.

    apns_to_use := $(wildcard vendor/google/etc/apns-conf.xml)

    PRODUCT_COPY_FILES

 

 

# For most goals, anything not tagged with the "tests" tag should be installed in /system.

 

# For the sdk goal, anything with the "samples" tag should be installed in /data even if that module also has "eng"/"debug"/"user".

 

# If they only used the modifier goals (showcommands, checkbuild), we'll actually build the default target.

 

 

# Build sdk

    if MAKECMDGOALS == clean or clobber or dataclean or installclean

        dont_bother = true

    if dont_bother != true

        # Bring in all modules that need to be built.

            if HOST_OS == windows or HOST_OS-HOST_ARCH == darwin-ppc

                SDK_ONLY = true

            if SDK_ONLY == true

                # ----- SDK for Windows ------(Cygwin)

                    subdirs

            else

                 if BUILD_TINY_ANDROID == true

                     # TINY_ANDROID is a super-minimal build configuration, handy for board bringup and very low level debugging

                 else

                      subdirs := $(TOP)
                      FULL_BUILD := true

 

# FULL_BUILD #

    if FULL_BUILD == true
        Only include this during a full build, otherwise we can't be guaranteed that any policies were included.
            -include frameworks/policies/base/PolicyConfig.mk

 

# ALL_MODULES #

# CUSTOM_MODULES #

 

 

# Use tags to get the non-APPS user modules.  Use the product
# definition files to get the APPS user modules.
    user_MODULES := $(sort $(call get-tagged-modules,user))
    user_MODULES := $(user_MODULES) $(user_PACKAGES)

    eng_MODULES := $(sort $(call get-tagged-modules,eng))
    debug_MODULES := $(sort $(call get-tagged-modules,debug))
    tests_MODULES := $(sort $(call get-tagged-modules,tests))

 

# Some packages may override others using LOCAL_OVERRIDES_PACKAGES. Filter out (do not install) any overridden packages.

 

# Don't include any GNU targets in the SDK.  It's ok (and necessary) to build the host tools, but nothing that's going to be installed on the target (including static libraries).

 

# build/core/Makefile contains extra stuff that we don't want to pollute this top-level makefile with.  It expects that ALL_DEFAULT_INSTALLED_MODULES contains everything that's built during the current make, but it also furtherextends ALL_DEFAULT_INSTALLED_MODULES.

 

 

 

Makefile method:

 

prebuilt

   

all_copied_headers

# An internal target that depends on all copied headers (see copy_headers.make).  Other targets that need the headers to be copied first can depend on this target.

   

files

# All the droid stuff, in directories

 

checkbuild

 

ramdisk

 

systemtarball

 

userdataimage

bootimage

 

droidcore

# Build files and then package it into the rom formats

 

dist_libraries

# dist_libraries only for putting your library into the dist directory with a full build.

 

apps_only

 

droid tests

 

all_modules

# phony target that include any targets in $(ALL_MODULES)

 

docs

 

sdk

 

findbugs

 

clean

 

clobber

# The rules for dataclean and installclean are defined in cleanbuild.mk.

 

modules

#xxx scrape this from ALL_MODULE_NAME_TAGS

 

showcommands

 

 

 

 

 

    modules_to_install