ifneq ($(strip $(TARGET_BUILD_APPS)),)
# An unbundled app build needs only the core product makefiles.
all_product_configs := $(call get-product-makefiles,\
$(SRC_TARGET_DIR)/product/AndroidProducts.mk)
else
# Read in all of the product definitions specified by the AndroidProducts.mk
# files in the tree.
all_product_configs := $(get-all-product-makefiles)
endif
ifneq (,$(filter product-graph dump-products, $(MAKECMDGOALS)))
# Import all product makefiles.
$(call import-products, $(all_product_makefiles))
else
# Import just the current product.
ifndef current_product_makefile
$(error Can not locate config makefile for product "$(TARGET_PRODUCT)")
endif
ifneq (1,$(words $(current_product_makefile)))
$(error Product "$(TARGET_PRODUCT)" ambiguous: matches $(current_product_makefile))
endif
$(call import-products, $(current_product_makefile))
endif # Import all or just the current product makefile
# Sanity check
$(check-all-products)
# Find the device that this product maps to.
TARGET_DEVICE := $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_DEVICE)
此时，TARGET_DEVICE = mini_x86.mk；
5获取要拷贝的文件
# A list of words like :[:].
# The file at the source path should be copied to the destination path
# when building this product. is relative to
# $(PRODUCT_OUT), so it should look like, e.g., "system/etc/file.xml".
# The rules for these copy steps are defined in build/core/Makefile.
# The optional : is used to indicate the owner of a vendor file.
PRODUCT_COPY_FILES := \
$(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_COPY_FILES))
# Boards may be defined under $(SRC_TARGET_DIR)/board/$(TARGET_DEVICE)
# or under vendor/*/$(TARGET_DEVICE). Search in both places, but
# make sure only one exists.
# Real boards should always be associated with an OEM vendor.
board_config_mk := \
$(strip $(wildcard \
$(SRC_TARGET_DIR)/board/$(TARGET_DEVICE)/BoardConfig.mk \
$(shell test -d device && find device -maxdepth 4 -path '*/$(TARGET_DEVICE)/BoardConfig.mk') \
$(shell test -d vendor && find vendor -maxdepth 4 -path '*/$(TARGET_DEVICE)/BoardConfig.mk') \
))
ifeq ($(board_config_mk),)
$(error No config file found for TARGET_DEVICE $(TARGET_DEVICE))
endif
ifneq ($(words $(board_config_mk)),1)
$(error Multiple board config files for TARGET_DEVICE $(TARGET_DEVICE): $(board_config_mk))
endif
include $(board_config_mk)
ifeq ($(TARGET_ARCH),)
$(error TARGET_ARCH not defined by board config: $(board_config_mk))
endif
ifneq ($(ONE_SHOT_MAKEFILE),)
# We've probably been invoked by the "mm" shell function
# with a subdirectory's makefile.
include $(ONE_SHOT_MAKEFILE)
# Change CUSTOM_MODULES to include only modules that were
# defined by this makefile; this will install all of those
# modules as a side-effect. Do this after including ONE_SHOT_MAKEFILE
# so that the modules will be installed in the same place they
# would have been with a normal make.
CUSTOM_MODULES := $(sort $(call get-tagged-modules,$(ALL_MODULE_TAGS)))
FULL_BUILD :=
# Stub out the notice targets, which probably aren't defined
# when using ONE_SHOT_MAKEFILE.
NOTICE-HOST-%: ;
NOTICE-TARGET-%: ;
# A helper goal printing out install paths
.PHONY: GET-INSTALL-PATH
GET-INSTALL-PATH:
@$(foreach m, $(ALL_MODULES), $(if $(ALL_MODULES.$(m).INSTALLED), \
echo 'INSTALL-PATH: $(m) $(ALL_MODULES.$(m).INSTALLED)';))
else # ONE_SHOT_MAKEFILE
ifneq ($(dont_bother),true)
#
# Include all of the makefiles in the system
#
# Can't use first-makefiles-under here because
# --mindepth=2 makes the prunes not work.
subdir_makefiles := \
$(shell build/tools/findleaves.py --prune=$(OUT_DIR) --prune=.repo --prune=.git $(subdirs) Android.mk)
$(foreach mk, $(subdir_makefiles), $(info including $(mk) ...)$(eval include $(mk)))
endif # dont_bother
endif # ONE_SHOT_MAKEFILE
ifdef FULL_BUILD
# The base list of modules to build for this product is specified
# by the appropriate product definition file, which was included
# by product_config.mk.
product_MODULES := $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_PACKAGES)
# Filter out the overridden packages before doing expansion
product_MODULES := $(filter-out $(foreach p, $(product_MODULES), \
$(PACKAGES.$(p).OVERRIDES)), $(product_MODULES))
# Resolve the :32 :64 module name
modules_32 := $(patsubst %:32,%,$(filter %:32, $(product_MODULES)))
modules_64 := $(patsubst %:64,%,$(filter %:64, $(product_MODULES)))
modules_rest := $(filter-out %:32 %:64,$(product_MODULES))
# Note for 32-bit product, $(modules_32) and $(modules_64) will be
# added as their original module names.
product_MODULES := $(call get-32-bit-modules-if-we-can, $(modules_32))
product_MODULES += $(modules_64)
# For the rest we add both
product_MODULES += $(call get-32-bit-modules, $(modules_rest))
product_MODULES += $(modules_rest)
$(call expand-required-modules,product_MODULES,$(product_MODULES))
product_FILES := $(call module-installed-files, $(product_MODULES))
ifeq (0,1)
$(info product_FILES for $(TARGET_DEVICE) ($(INTERNAL_PRODUCT)):)
$(foreach p,$(product_FILES),$(info : $(p)))
$(error done)
endif
else
# We're not doing a full build, and are probably only including
# a subset of the module makefiles. Don't try to build any modules
# requested by the product, because we probably won't have rules
# to build them.
product_FILES :=
endif
ifneq ($(TARGET_BUILD_APPS),)
# If this build is just for apps, only build apps and not the full system by default.
unbundled_build_modules :=
ifneq ($(filter all,$(TARGET_BUILD_APPS)),)
# If they used the magic goal "all" then build all apps in the source tree.
unbundled_build_modules := $(foreach m,$(sort $(ALL_MODULES)),$(if $(filter APPS,$(ALL_MODULES.$(m).CLASS)),$(m)))
else
unbundled_build_modules := $(TARGET_BUILD_APPS)
endif
...
.PHONY: apps_only
apps_only: $(unbundled_build_modules)
droid: apps_only
else # TARGET_BUILD_APPS
$(call dist-for-goals, droidcore, \
$(INTERNAL_UPDATE_PACKAGE_TARGET) \
$(INTERNAL_OTA_PACKAGE_TARGET) \
$(BUILT_OTATOOLS_PACKAGE) \
$(SYMBOLS_ZIP) \
$(INSTALLED_FILES_FILE) \
$(INSTALLED_BUILD_PROP_TARGET) \
$(BUILT_TARGET_FILES_PACKAGE) \
$(INSTALLED_ANDROID_INFO_TXT_TARGET) \
$(INSTALLED_RAMDISK_TARGET) \
)
# Building a full system-- the default is to build droidcore
droid: droidcore dist_files
endif # TARGET_BUILD_APPS
我们期望的是整个系统的编译，所以，droid依赖的是droidcore 和 dist_files
4.1droidcore的定义：
# Build files and then package it into the rom formats
.PHONY: droidcore
droidcore: files \
systemimage \
$(INSTALLED_BOOTIMAGE_TARGET) \
$(INSTALLED_RECOVERYIMAGE_TARGET) \
$(INSTALLED_USERDATAIMAGE_TARGET) \
$(INSTALLED_CACHEIMAGE_TARGET) \
$(INSTALLED_VENDORIMAGE_TARGET) \
$(INSTALLED_FILES_FILE)
# All the droid stuff, in directories
.PHONY: files
files: prebuilt \
$(modules_to_install) \
$(INSTALLED_ANDROID_INFO_TXT_TARGET)、
1.1files又依赖了三个目标，第一个是prebuilt:
# -------------------------------------------------------------------
# This is used to to get the ordering right, you can also use these,
# but they're considered undocumented, so don't complain if their
# behavior changes.
.PHONY: prebuilt
prebuilt: $(ALL_PREBUILT）
web.xml报错
The content of element type "web-app" must match "(icon?,display-
name?,description?,distributable?,context-param*,filter*,filter-mapping*,listener*,servlet*,s
JUnit4：Test文档中的解释：
The Test annotation supports two optional parameters.
The first, expected, declares that a test method should throw an exception.
If it doesn't throw an exception or if it
借鉴网上的思路，用java实现：
public class NoIfWhile {
/**
* @param args
*
* find x=1+2+3+....n
*/
public static void main(String[] args) {
int n=10;
int re=find(n);
System.o
在Linux中执行.sh脚本，异常/bin/sh^M: bad interpreter: No such file or directory。
分析：这是不同系统编码格式引起的：在windows系统中编辑的.sh文件可能有不可见字符，所以在Linux系统下执行会报以上异常信息。
解决：
1）在windows下转换：
利用一些编辑器如UltraEdit或EditPlus等工具
Binary search tree works well for a wide variety of applications, but they have poor worst-case performance. Now we introduce a type of binary search tree where costs are guaranteed to be loga
