Android中定义的路径全局变量

对Android定义的路径全局变量，在build/core/envsetup.mk文件中查看如下代码：

ifeq (,$(strip $(OUT_DIR)))
OUT_DIR := $(TOPDIR)out
endif

DEBUG_OUT_DIR := $(OUT_DIR)/debug

# Move the host or target under the debug/ directory
# if necessary.
TARGET_OUT_ROOT_release := $(OUT_DIR)/target
TARGET_OUT_ROOT_debug := $(DEBUG_OUT_DIR)/target
TARGET_OUT_ROOT := $(TARGET_OUT_ROOT_$(TARGET_BUILD_TYPE))

HOST_OUT_ROOT_release := $(OUT_DIR)/host
HOST_OUT_ROOT_debug := $(DEBUG_OUT_DIR)/host
HOST_OUT_ROOT := $(HOST_OUT_ROOT_$(HOST_BUILD_TYPE))

HOST_OUT_release := $(HOST_OUT_ROOT_release)/$(HOST_OS)-$(HOST_ARCH)
HOST_OUT_debug := $(HOST_OUT_ROOT_debug)/$(HOST_OS)-$(HOST_ARCH)
HOST_OUT := $(HOST_OUT_$(HOST_BUILD_TYPE))

ifeq ($(TARGET_SIMULATOR),true)
  # Any arch- or os-specific parts of the simulator (everything
  # under product/) are actually host-dependent.
  # But, the debug type is controlled by TARGET_BUILD_TYPE and not
  # HOST_BUILD_TYPE.
  TARGET_PRODUCT_OUT_ROOT := $(HOST_OUT_$(TARGET_BUILD_TYPE))/product
else
  TARGET_PRODUCT_OUT_ROOT := $(TARGET_OUT_ROOT)/product
endif

TARGET_COMMON_OUT_ROOT := $(TARGET_OUT_ROOT)/common
HOST_COMMON_OUT_ROOT := $(HOST_OUT_ROOT)/common

PRODUCT_OUT := $(TARGET_PRODUCT_OUT_ROOT)/$(TARGET_DEVICE)

OUT_DOCS := $(TARGET_COMMON_OUT_ROOT)/docs

HOST_OUT_EXECUTABLES:= $(HOST_OUT)/bin
HOST_OUT_SHARED_LIBRARIES:= $(HOST_OUT)/lib
HOST_OUT_JAVA_LIBRARIES:= $(HOST_OUT)/framework
HOST_OUT_SDK_ADDON := $(HOST_OUT)/sdk_addon

HOST_OUT_INTERMEDIATES := $(HOST_OUT)/obj
HOST_OUT_HEADERS:= $(HOST_OUT_INTERMEDIATES)/include
HOST_OUT_INTERMEDIATE_LIBRARIES := $(HOST_OUT_INTERMEDIATES)/lib
HOST_OUT_STATIC_LIBRARIES := $(HOST_OUT_INTERMEDIATE_LIBRARIES)
HOST_OUT_NOTICE_FILES:=$(HOST_OUT_INTERMEDIATES)/NOTICE_FILES
HOST_OUT_COMMON_INTERMEDIATES := $(HOST_COMMON_OUT_ROOT)/obj

TARGET_OUT_INTERMEDIATES := $(PRODUCT_OUT)/obj
TARGET_OUT_HEADERS:= $(TARGET_OUT_INTERMEDIATES)/include
TARGET_OUT_INTERMEDIATE_LIBRARIES := $(TARGET_OUT_INTERMEDIATES)/lib
TARGET_OUT_COMMON_INTERMEDIATES := $(TARGET_COMMON_OUT_ROOT)/obj

TARGET_OUT := $(PRODUCT_OUT)/system
TARGET_OUT_EXECUTABLES:= $(TARGET_OUT)/bin
TARGET_OUT_OPTIONAL_EXECUTABLES:= $(TARGET_OUT)/xbin
TARGET_OUT_SHARED_LIBRARIES:= $(TARGET_OUT)/lib
TARGET_OUT_JAVA_LIBRARIES:= $(TARGET_OUT)/framework
TARGET_OUT_APPS:= $(TARGET_OUT)/app
TARGET_OUT_KEYLAYOUT := $(TARGET_OUT)/usr/keylayout
TARGET_OUT_KEYCHARS := $(TARGET_OUT)/usr/keychars
TARGET_OUT_ETC := $(TARGET_OUT)/etc
TARGET_OUT_STATIC_LIBRARIES:= $(TARGET_OUT_INTERMEDIATES)/lib
TARGET_OUT_NOTICE_FILES:=$(TARGET_OUT_INTERMEDIATES)/NOTICE_FILES

TARGET_OUT_DATA := $(PRODUCT_OUT)/data
TARGET_OUT_DATA_EXECUTABLES:= $(TARGET_OUT_EXECUTABLES)
TARGET_OUT_DATA_SHARED_LIBRARIES:= $(TARGET_OUT_SHARED_LIBRARIES)
TARGET_OUT_DATA_JAVA_LIBRARIES:= $(TARGET_OUT_JAVA_LIBRARIES)
TARGET_OUT_DATA_APPS:= $(TARGET_OUT_DATA)/app
TARGET_OUT_DATA_KEYLAYOUT := $(TARGET_OUT_KEYLAYOUT)
TARGET_OUT_DATA_KEYCHARS := $(TARGET_OUT_KEYCHARS)
TARGET_OUT_DATA_ETC := $(TARGET_OUT_ETC)
TARGET_OUT_DATA_STATIC_LIBRARIES:= $(TARGET_OUT_STATIC_LIBRARIES)

TARGET_OUT_UNSTRIPPED := $(PRODUCT_OUT)/symbols
TARGET_OUT_EXECUTABLES_UNSTRIPPED := $(TARGET_OUT_UNSTRIPPED)/system/bin
TARGET_OUT_SHARED_LIBRARIES_UNSTRIPPED := $(TARGET_OUT_UNSTRIPPED)/system/lib
TARGET_ROOT_OUT_UNSTRIPPED := $(TARGET_OUT_UNSTRIPPED)
TARGET_ROOT_OUT_SBIN_UNSTRIPPED := $(TARGET_OUT_UNSTRIPPED)/sbin
TARGET_ROOT_OUT_BIN_UNSTRIPPED := $(TARGET_OUT_UNSTRIPPED)/bin

TARGET_ROOT_OUT := $(PRODUCT_OUT)/root
TARGET_ROOT_OUT_BIN := $(TARGET_ROOT_OUT)/bin
TARGET_ROOT_OUT_SBIN := $(TARGET_ROOT_OUT)/sbin
TARGET_ROOT_OUT_ETC := $(TARGET_ROOT_OUT)/etc
TARGET_ROOT_OUT_USR := $(TARGET_ROOT_OUT)/usr

TARGET_RECOVERY_OUT := $(PRODUCT_OUT)/recovery
TARGET_RECOVERY_ROOT_OUT := $(TARGET_RECOVERY_OUT)/root

TARGET_SYSLOADER_OUT := $(PRODUCT_OUT)/sysloader
TARGET_SYSLOADER_ROOT_OUT := $(TARGET_SYSLOADER_OUT)/root
TARGET_SYSLOADER_SYSTEM_OUT := $(TARGET_SYSLOADER_OUT)/root/system

TARGET_INSTALLER_OUT := $(PRODUCT_OUT)/installer
TARGET_INSTALLER_DATA_OUT := $(TARGET_INSTALLER_OUT)/data
TARGET_INSTALLER_ROOT_OUT := $(TARGET_INSTALLER_OUT)/root
TARGET_INSTALLER_SYSTEM_OUT := $(TARGET_INSTALLER_OUT)/root/system

COMMON_MODULE_CLASSES := JAVA_LIBRARIES NOTICE_FILES