diff --git a/core/64_bit_blacklist.mk b/core/64_bit_blacklist.mk
new file mode 100644
index 0000000..71a5cf3
--- /dev/null
+++ b/core/64_bit_blacklist.mk
@@ -0,0 +1,53 @@
+ifneq ($(TARGET_2ND_ARCH),)
+
+# JNI - needs 64-bit VM
+_64_bit_directory_blacklist += \
+	external/conscrypt \
+	external/neven \
+	external/svox \
+	libcore \
+	packages \
+
+# Chromium/V8: needs 64-bit support
+_64_bit_directory_blacklist += \
+	external/chromium \
+	external/chromium-libpac \
+	external/chromium_org \
+	external/skia \
+	external/v8 \
+	frameworks/webview \
+
+# misc build errors
+_64_bit_directory_blacklist += \
+	external/bluetooth/bluedroid \
+	external/oprofile/opcontrol \
+	external/tcpdump \
+	frameworks/av \
+	frameworks/base \
+	frameworks/ex \
+	frameworks/ml \
+	frameworks/opt \
+	frameworks/wilhelm \
+	device/generic/goldfish/opengl \
+	device/generic/goldfish/camera \
+
+# depends on libnl_2
+_64_bit_directory_blacklist += \
+	external/android-clat \
+	external/wpa_suplicant_8
+
+# depends on frameworks/av
+_64_bit_directory_blacklist += \
+	external/srec \
+	hardware/libhardware_legacy/audio \
+	hardware/libhardware/modules/audio_remote_submix \
+
+_64_bit_directory_blacklist_pattern := $(addsuffix %,$(_64_bit_directory_blacklist))
+
+define directory_is_64_bit_blacklisted
+$(if $(filter $(_64_bit_directory_blacklist_pattern),$(1)),true)
+endef
+else
+define directory_is_64_bit_blacklisted
+endef
+endif
diff --git a/core/Makefile b/core/Makefile
index 2bcf0cf..d76aca6 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -644,6 +644,10 @@
 
 INSTALLED_RECOVERYIMAGE_TARGET := $(PRODUCT_OUT)/recovery.img
 
+# HACK: clear LOCAL_PATH from including last build target before calling
+# intermedites-dir-for
+LOCAL_PATH := $(call my-dir)
+
 recovery_initrc := $(call include-path-for, recovery)/etc/init.rc
 recovery_kernel := $(INSTALLED_KERNEL_TARGET) # same as a non-recovery system
 recovery_ramdisk := $(PRODUCT_OUT)/ramdisk-recovery.img
diff --git a/core/base_rules.mk b/core/base_rules.mk
index a6af2bc..32e6b73 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -597,7 +597,8 @@
 ALL_MODULES.$(my_register_name).INSTALLED := \
     $(strip $(ALL_MODULES.$(my_register_name).INSTALLED) $(LOCAL_INSTALLED_MODULE))
 ALL_MODULES.$(my_register_name).REQUIRED := \
-    $(ALL_MODULES.$(my_register_name).REQUIRED) $(LOCAL_REQUIRED_MODULES) $(LOCAL_REQUIRED_MODULES_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH))
+    $(strip $(ALL_MODULES.$(my_register_name).REQUIRED) $(LOCAL_REQUIRED_MODULES) \
+      $(LOCAL_REQUIRED_MODULES_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)))
 ALL_MODULES.$(my_register_name).EVENT_LOG_TAGS := \
     $(ALL_MODULES.$(my_register_name).EVENT_LOG_TAGS) $(event_log_tags)
 ALL_MODULES.$(my_register_name).INTERMEDIATE_SOURCE_DIR := \
@@ -608,6 +609,9 @@
 ALL_MODULES.$(my_register_name).OWNER := \
     $(sort $(ALL_MODULES.$(my_register_name).OWNER) $(LOCAL_MODULE_OWNER))
 endif
+ifdef LOCAL_2ND_ARCH_VAR_PREFIX
+ALL_MODULES.$(my_register_name).FOR_2ND_ARCH := true
+endif
 
 INSTALLABLE_FILES.$(LOCAL_INSTALLED_MODULE).MODULE := $(my_register_name)
 
diff --git a/core/binary.mk b/core/binary.mk
index bbdf4d2..e22cd84 100644
--- a/core/binary.mk
+++ b/core/binary.mk
@@ -85,21 +85,37 @@
 # The following LOCAL_ variables will be modified in this file.
 # Because the same LOCAL_ variables may be used to define modules for both 1st arch and 2nd arch,
 # we can't modify them in place.
-my_src_files := $(LOCAL_SRC_FILES) $(LOCAL_SRC_FILES_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH))
-my_static_libraries := $(LOCAL_STATIC_LIBRARIES_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_STATIC_LIBRARIES)
-my_whole_static_libraries := $(LOCAL_WHOLE_STATIC_LIBRARIES) $(LOCAL_WHOLE_STATIC_LIBRARIES_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH))
-my_shared_libraries := $(LOCAL_SHARED_LIBRARIES) $(LOCAL_SHARED_LIBRARIES_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH))
-my_32_64_bit_suffix := $(if $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_IS_64_BIT),64,32)
-my_cflags := $(LOCAL_CFLAGS) $(LOCAL_CFLAGS_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_CFLAGS_$(my_32_64_bit_suffix))
+my_src_files := $(LOCAL_SRC_FILES)
+my_static_libraries := $(LOCAL_STATIC_LIBRARIES)
+my_whole_static_libraries := $(LOCAL_WHOLE_STATIC_LIBRARIES)
+my_shared_libraries := $(LOCAL_SHARED_LIBRARIES)
+my_cflags := $(LOCAL_CFLAGS)
 my_cppflags := $(LOCAL_CPPFLAGS)
-my_ldflags := $(LOCAL_LDFLAGS) $(LOCAL_LDFLAGS_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_LDFLAGS_$(my_32_64_bit_suffix))
-my_asflags := $(LOCAL_ASFLAGS) $(LOCAL_ASFLAGS_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_ASFLAGS_$(my_32_64_bit_suffix))
+my_ldflags := $(LOCAL_LDFLAGS)
+my_asflags := $(LOCAL_ASFLAGS)
 my_cc := $(LOCAL_CC)
 my_cxx := $(LOCAL_CXX)
-my_c_includes := $(LOCAL_C_INCLUDES) $(LOCAL_C_INCLUDES_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_C_INCLUDES_$(my_32_64_bit_suffix))
-my_generated_sources := $(LOCAL_GENERATED_SOURCES) $(LOCAL_GENERATED_SOURCES_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH))
+my_c_includes := $(LOCAL_C_INCLUDES)
+my_generated_sources := $(LOCAL_GENERATED_SOURCES)
+
+ifndef LOCAL_IS_HOST_MODULE
+my_32_64_bit_suffix := $(if $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_IS_64_BIT),64,32)
+
+my_src_files += $(LOCAL_SRC_FILES_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_SRC_FILES_$(my_32_64_bit_suffix))
+my_shared_libraries += $(LOCAL_SHARED_LIBRARIES_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_SHARED_LIBRARIES_$(my_32_64_bit_suffix))
+my_cflags += $(LOCAL_CFLAGS_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_CFLAGS_$(my_32_64_bit_suffix))
+my_cppflags += $(LOCAL_CPPFLAGS_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_CPPFLAGS_$(my_32_64_bit_suffix))
+my_ldflags += $(LOCAL_LDFLAGS_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_LDFLAGS_$(my_32_64_bit_suffix))
+my_asflags += $(LOCAL_ASFLAGS_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_ASFLAGS_$(my_32_64_bit_suffix))
+my_c_includes += $(LOCAL_C_INCLUDES_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_C_INCLUDES_$(my_32_64_bit_suffix))
+my_generated_sources += $(LOCAL_GENERATED_SOURCES_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_GENERATED_SOURCES_$(my_32_64_bit_suffix))
+
+# arch-specific static libraries go first so that generic ones can depend on them
+my_static_libraries := $(LOCAL_STATIC_LIBRARIES_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_STATIC_LIBRARIES_$(my_32_64_bit_suffix)) $(my_static_libraries)
+my_whole_static_libraries := $(LOCAL_WHOLE_STATIC_LIBRARIES_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_WHOLE_STATIC_LIBRARIES_$(my_32_64_bit_suffix)) $(my_whole_static_libraries)
 
 my_cflags := $(filter-out $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_UNSUPPORTED_CFLAGS),$(my_cflags))
+endif
 
 # The real dependency will be added after all Android.mks are loaded and the install paths
 # of the shared libraries are determined.
@@ -687,7 +703,7 @@
 
 all_objects := $(normal_objects) $(gen_o_objects)
 
-my_c_includes += $(TOPDIR)$(LOCAL_PATH) $(intermediates)
+my_c_includes += $(TOPDIR)$(LOCAL_PATH) $(intermediates) $(generated_sources_dir)
 
 ifndef LOCAL_SDK_VERSION
   my_c_includes += $(JNI_H_INCLUDE)
@@ -701,12 +717,6 @@
 $(all_objects) : | $(import_includes)
 ALL_C_CPP_ETC_OBJECTS += $(all_objects)
 
-###########################################################
-## Copy headers to the install tree
-###########################################################
-ifndef LOCAL_2ND_ARCH_VAR_PREFIX
-include $(BUILD_COPY_HEADERS)
-endif
 
 ###########################################################
 # Standard library handling.
diff --git a/core/clang/TARGET_arm.mk b/core/clang/TARGET_arm.mk
index 373f276..f32bbfb 100644
--- a/core/clang/TARGET_arm.mk
+++ b/core/clang/TARGET_arm.mk
@@ -3,7 +3,7 @@
 
 CLANG_CONFIG_arm_TARGET_TRIPLE := arm-linux-androideabi
 CLANG_CONFIG_arm_TARGET_TOOLCHAIN_PREFIX := \
-  $(TARGET_TOOLCHAIN_ROOT)/$(CLANG_CONFIG_arm_TARGET_TRIPLE)/bin
+  $($(clang_2nd_arch_prefix)TARGET_TOOLCHAIN_ROOT)/$(CLANG_CONFIG_arm_TARGET_TRIPLE)/bin
 
 CLANG_CONFIG_arm_TARGET_EXTRA_ASFLAGS := \
   $(CLANG_CONFIG_EXTRA_ASFLAGS) \
diff --git a/core/clang/TARGET_mips.mk b/core/clang/TARGET_mips.mk
index 215a8ae..e70e254 100644
--- a/core/clang/TARGET_mips.mk
+++ b/core/clang/TARGET_mips.mk
@@ -3,7 +3,7 @@
 
 CLANG_CONFIG_mips_TARGET_TRIPLE := mipsel-linux-android
 CLANG_CONFIG_mips_TARGET_TOOLCHAIN_PREFIX := \
-  $(TARGET_TOOLCHAIN_ROOT)/$(CLANG_CONFIG_mips_TARGET_TRIPLE)/bin
+  $($(clang_2nd_arch_prefix)TARGET_TOOLCHAIN_ROOT)/$(CLANG_CONFIG_mips_TARGET_TRIPLE)/bin
 
 CLANG_CONFIG_mips_TARGET_EXTRA_ASFLAGS := \
   $(CLANG_CONFIG_EXTRA_ASFLAGS) \
diff --git a/core/clang/TARGET_x86.mk b/core/clang/TARGET_x86.mk
index 0178093..70cb252 100644
--- a/core/clang/TARGET_x86.mk
+++ b/core/clang/TARGET_x86.mk
@@ -2,8 +2,10 @@
 include $(BUILD_SYSTEM)/clang/x86.mk
 
 CLANG_CONFIG_x86_TARGET_TRIPLE := i686-linux-android
+# NOTE: There is no i686-linux-android prebuilt, so we must hardcode the
+# x86_64 target instead.
 CLANG_CONFIG_x86_TARGET_TOOLCHAIN_PREFIX := \
-  $(TARGET_TOOLCHAIN_ROOT)/x86_64-linux-android/bin
+  $($(clang_2nd_arch_prefix)TARGET_TOOLCHAIN_ROOT)/x86_64-linux-android/bin
 
 CLANG_CONFIG_x86_TARGET_EXTRA_ASFLAGS := \
   $(CLANG_CONFIG_EXTRA_ASFLAGS) \
diff --git a/core/clang/config.mk b/core/clang/config.mk
index d134a8d..1fd69d7 100644
--- a/core/clang/config.mk
+++ b/core/clang/config.mk
@@ -1,8 +1,18 @@
+ifeq (true,$(FORCE_BUILD_LLVM_COMPONENTS))
+LLVM_PREBUILTS_PATH := $(BUILD_OUT_EXECUTABLES)
+LLVM_PREBUILTS_HEADER_PATH := external/clang/lib/include
+else
+LLVM_PREBUILTS_PATH := prebuilts/clang/$(BUILD_OS)-x86/host/3.4/bin
+LLVM_PREBUILTS_HEADER_PATH := prebuilts/clang/$(BUILD_OS)-x86/host/3.4/lib/clang/3.4/include/
+endif
 
-CLANG := $(HOST_OUT_EXECUTABLES)/clang$(HOST_EXECUTABLE_SUFFIX)
-CLANG_CXX := $(HOST_OUT_EXECUTABLES)/clang++$(HOST_EXECUTABLE_SUFFIX)
-LLVM_AS := $(HOST_OUT_EXECUTABLES)/llvm-as$(HOST_EXECUTABLE_SUFFIX)
-LLVM_LINK := $(HOST_OUT_EXECUTABLES)/llvm-link$(HOST_EXECUTABLE_SUFFIX)
+CLANG := $(LLVM_PREBUILTS_PATH)/clang$(BUILD_EXECUTABLE_SUFFIX)
+CLANG_CXX := $(LLVM_PREBUILTS_PATH)/clang++$(BUILD_EXECUTABLE_SUFFIX)
+CLANG_TBLGEN := $(LLVM_PREBUILTS_PATH)/clang-tblgen$(BUILD_EXECUTABLE_SUFFIX)
+LLVM_AS := $(LLVM_PREBUILTS_PATH)/llvm-as$(BUILD_EXECUTABLE_SUFFIX)
+LLVM_LINK := $(LLVM_PREBUILTS_PATH)/llvm-link$(BUILD_EXECUTABLE_SUFFIX)
+TBLGEN := $(LLVM_PREBUILTS_PATH)/tblgen$(BUILD_EXECUTABLE_SUFFIX)
+
 
 # Clang flags for all host or target rules
 CLANG_CONFIG_EXTRA_ASFLAGS :=
@@ -46,8 +56,8 @@
 
 
 # Clang compiler-specific libc headers
-CLANG_CONFIG_EXTRA_HOST_C_INCLUDES := external/clang/lib/include
-CLANG_CONFIG_EXTRA_TARGET_C_INCLUDES := external/clang/lib/include $(TARGET_OUT_HEADERS)/clang
+CLANG_CONFIG_EXTRA_HOST_C_INCLUDES := $(LLVM_PREBUILTS_HEADER_PATH)
+CLANG_CONFIG_EXTRA_TARGET_C_INCLUDES := $(LLVM_PREBUILTS_HEADER_PATH) $(TARGET_OUT_HEADERS)/clang
 
 # Address sanitizer clang config
 ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS := -fsanitize=address
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 0f6308c..f192c0b 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -145,10 +145,15 @@
 LOCAL_NO_STATIC_ANALYZER:=
 LOCAL_32_BIT_ONLY:= # '',true
 LOCAL_NO_2ND_ARCH:= # '',true
+LOCAL_MODULE_TARGET_ARCH:=
+LOCAL_MODULE_TARGET_ARCH_WARN:=
+LOCAL_MODULE_UNSUPPORTED_TARGET_ARCH:=
+LOCAL_MODULE_UNSUPPORTED_TARGET_ARCH_WARN:=
 
 # arch specific variables
 LOCAL_SRC_FILES_$(TARGET_ARCH):=
 LOCAL_CFLAGS_$(TARGET_ARCH):=
+LOCAL_CPPFLAGS_$(TARGET_ARCH):=
 LOCAL_C_INCLUDES_$(TARGET_ARCH):=
 LOCAL_ASFLAGS_$(TARGET_ARCH):=
 LOCAL_NO_CRT_$(TARGET_ARCH):=
@@ -161,6 +166,7 @@
 ifdef TARGET_2ND_ARCH
 LOCAL_SRC_FILES_$(TARGET_2ND_ARCH):=
 LOCAL_CFLAGS_$(TARGET_2ND_ARCH):=
+LOCAL_CPPFLAGS_$(TARGET_2ND_ARCH):=
 LOCAL_C_INCLUDES_$(TARGET_2ND_ARCH):=
 LOCAL_ASFLAGS_$(TARGET_2ND_ARCH):=
 LOCAL_NO_CRT_$(TARGET_2ND_ARCH):=
@@ -172,8 +178,20 @@
 LOCAL_REQUIRED_MODULES_$(TARGET_2ND_ARCH):=
 endif
 
+LOCAL_SRC_FILES_32:=
+LOCAL_SRC_FILES_64:=
+LOCAL_SHARED_LIBRARIES_32:=
+LOCAL_SHARED_LIBRARIES_64:=
+LOCAL_STATIC_LIBRARIES_32:=
+LOCAL_STATIC_LIBRARIES_64:=
+LOCAL_WHOLE_STATIC_LIBRARIES_32:=
+LOCAL_WHOLE_STATIC_LIBRARIES_64:=
+LOCAL_GENERATED_SOURCES_32:=
+LOCAL_GENERATED_SOURCES_64:=
 LOCAL_CFLAGS_32:=
 LOCAL_CFLAGS_64:=
+LOCAL_CPPFLAGS_32:=
+LOCAL_CPPFLAGS_64:=
 LOCAL_LDFLAGS_32:=
 LOCAL_LDFLAGS_64:=
 LOCAL_ASFLAGS_32:=
diff --git a/core/combo/HOST_darwin-x86.mk b/core/combo/HOST_darwin-x86.mk
index 33289ac..a0aaafa 100644
--- a/core/combo/HOST_darwin-x86.mk
+++ b/core/combo/HOST_darwin-x86.mk
@@ -95,7 +95,7 @@
 endif # $(HOST_TOOLCHAIN_PREFIX)-gcc exists
 HOST_AR := $(AR)
 HOST_STRIP := $(STRIP)
-HOST_STRIP_COMMAND = $(HOST_STRIP) --strip-debug $< -o $@
+HOST_STRIP_COMMAND = $(HOST_STRIP) --strip-all $< -o $@
 
 HOST_GLOBAL_CFLAGS += -isysroot $(mac_sdk_root) -mmacosx-version-min=$(mac_sdk_version) -DMACOSX_DEPLOYMENT_TARGET=$(mac_sdk_version)
 HOST_GLOBAL_LDFLAGS += -isysroot $(mac_sdk_root) -Wl,-syslibroot,$(mac_sdk_root) -mmacosx-version-min=$(mac_sdk_version)
diff --git a/core/combo/TARGET_linux-arm.mk b/core/combo/TARGET_linux-arm.mk
index f6971c5..213cae2 100644
--- a/core/combo/TARGET_linux-arm.mk
+++ b/core/combo/TARGET_linux-arm.mk
@@ -250,7 +250,7 @@
 	-Wl,--gc-sections \
 	-Wl,-z,nocopyreloc \
 	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
-	-Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \
+	-Wl,-rpath-link=$(PRIVATE_TARGET_OUT_INTERMEDIATE_LIBRARIES) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O)) \
 	$(PRIVATE_ALL_OBJECTS) \
 	-Wl,--whole-archive \
diff --git a/core/combo/TARGET_linux-arm64.mk b/core/combo/TARGET_linux-arm64.mk
index 2d344de..7a7a0c9 100644
--- a/core/combo/TARGET_linux-arm64.mk
+++ b/core/combo/TARGET_linux-arm64.mk
@@ -192,7 +192,7 @@
 	-Wl,-dynamic-linker,/system/bin/linker64 \
 	-Wl,-z,nocopyreloc \
 	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
-	-Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \
+	-Wl,-rpath-link=$(PRIVATE_TARGET_OUT_INTERMEDIATE_LIBRARIES) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O)) \
 	$(PRIVATE_ALL_OBJECTS) \
 	-Wl,--whole-archive \
diff --git a/core/combo/TARGET_linux-mips.mk b/core/combo/TARGET_linux-mips.mk
index 637c8f6..31e0b9a 100644
--- a/core/combo/TARGET_linux-mips.mk
+++ b/core/combo/TARGET_linux-mips.mk
@@ -30,43 +30,43 @@
 # include defines, and compiler settings for the given architecture
 # version.
 #
-ifeq ($(strip $(TARGET_ARCH_VARIANT)),)
-TARGET_ARCH_VARIANT := mips32r2-fp
+ifeq ($(strip $(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT)),)
+TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT := mips32r2-fp
 endif
 
 ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),)
-TARGET_GCC_VERSION := 4.8
+$(combo_2nd_arch_prefix)TARGET_GCC_VERSION := 4.8
 else
-TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
+$(combo_2nd_arch_prefix)TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
 endif
 
-TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk
+TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_$(combo_2nd_arch_prefix)ARCH)/$(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT).mk
 ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),)
-$(error Unknown MIPS architecture variant: $(TARGET_ARCH_VARIANT))
+$(error Unknown MIPS architecture variant: $(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT))
 endif
 
 include $(TARGET_ARCH_SPECIFIC_MAKEFILE)
 
 # You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else
-ifeq ($(strip $(TARGET_TOOLS_PREFIX)),)
-TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/mips/mipsel-linux-android-$(TARGET_GCC_VERSION)
-TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/mipsel-linux-android-
+ifeq ($(strip $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)),)
+$(combo_2nd_arch_prefix)TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/mips/mipsel-linux-android-$($(combo_2nd_arch_prefix)TARGET_GCC_VERSION)
+$(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX := $($(combo_2nd_arch_prefix)TARGET_TOOLCHAIN_ROOT)/bin/mipsel-linux-android-
 endif
 
-TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)
-TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX)
-TARGET_AR := $(TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX)
-TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX)
-TARGET_LD := $(TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX)
-TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX)
+$(combo_2nd_arch_prefix)TARGET_CC := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)
+$(combo_2nd_arch_prefix)TARGET_CXX := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX)
+$(combo_2nd_arch_prefix)TARGET_AR := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX)
+$(combo_2nd_arch_prefix)TARGET_OBJCOPY := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX)
+$(combo_2nd_arch_prefix)TARGET_LD := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX)
+$(combo_2nd_arch_prefix)TARGET_STRIP := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX)
 ifeq ($(TARGET_BUILD_VARIANT),user)
-    TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-all $< -o $@
+    $(combo_2nd_arch_prefix)TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-all $< -o $@
 else
-    TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-all $< -o $@ && \
+    $(combo_2nd_arch_prefix)TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-all $< -o $@ && \
         $(PRIVATE_OBJCOPY) --add-gnu-debuglink=$< $@
 endif
 
-TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined
+$(combo_2nd_arch_prefix)TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined
 
 TARGET_mips_CFLAGS :=	-O2 \
 			-fomit-frame-pointer \
@@ -82,7 +82,7 @@
 
 android_config_h := $(call select-android-config-h,linux-mips)
 
-TARGET_GLOBAL_CFLAGS += \
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += \
 			$(TARGET_mips_CFLAGS) \
 			-Ulinux -U__unix -U__unix__ -Umips \
 			-fpic -fPIE\
@@ -99,8 +99,8 @@
 # This warning causes dalvik not to build with gcc 4.6+ and -Werror.
 # We cannot turn it off blindly since the option is not available
 # in gcc-4.4.x.
-ifneq ($(filter 4.6 4.6.% 4.7 4.7.% 4.8, $(TARGET_GCC_VERSION)),)
-TARGET_GLOBAL_CFLAGS += -Wno-unused-but-set-variable \
+ifneq ($(filter 4.6 4.6.% 4.7 4.7.% 4.8, $($(combo_2nd_arch_prefix)TARGET_GCC_VERSION)),)
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -Wno-unused-but-set-variable \
                         -fno-strict-volatile-bitfields
 endif
 
@@ -112,13 +112,13 @@
 # in their exported C++ functions). Also, GCC 4.5 has already
 # removed the warning from the compiler.
 #
-TARGET_GLOBAL_CFLAGS += -Wno-psabi
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -Wno-psabi
 
 ifneq ($(ARCH_MIPS_PAGE_SHIFT),)
-TARGET_GLOBAL_CFLAGS += -DPAGE_SHIFT=$(ARCH_MIPS_PAGE_SHIFT)
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -DPAGE_SHIFT=$(ARCH_MIPS_PAGE_SHIFT)
 endif
 
-TARGET_GLOBAL_LDFLAGS += \
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_LDFLAGS += \
 			-Wl,-z,noexecstack \
 			-Wl,-z,relro \
 			-Wl,-z,now \
@@ -126,10 +126,10 @@
 			-Wl,--fatal-warnings \
 			$(arch_variant_ldflags)
 
-TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden
 
 # More flags/options can be added here
-TARGET_RELEASE_CFLAGS := \
+$(combo_2nd_arch_prefix)TARGET_RELEASE_CFLAGS := \
 			-DNDEBUG \
 			-g \
 			-Wstrict-aliasing=2 \
@@ -143,45 +143,45 @@
 
 
 ## on some hosts, the target cross-compiler is not available so do not run this command
-ifneq ($(wildcard $(TARGET_CC)),)
+ifneq ($(wildcard $($(combo_2nd_arch_prefix)TARGET_CC)),)
 # We compile with the global cflags to ensure that
 # any flags which affect libgcc are correctly taken
 # into account.
-TARGET_LIBGCC := \
-  $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) -print-file-name=libgcc.a)
-LIBGCC_EH := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) -print-file-name=libgcc_eh.a)
+$(combo_2nd_arch_prefix)TARGET_LIBGCC := \
+  $(shell $($(combo_2nd_arch_prefix)TARGET_CC) $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) -print-file-name=libgcc.a)
+LIBGCC_EH := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) -print-file-name=libgcc_eh.a)
 ifneq ($(LIBGCC_EH),libgcc_eh.a)
-  TARGET_LIBGCC += $(LIBGCC_EH)
+  $(combo_2nd_arch_prefix)TARGET_LIBGCC += $(LIBGCC_EH)
 endif
-target_libgcov := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \
+target_libgcov := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) \
         --print-file-name=libgcov.a)
 endif
 
 # Define FDO (Feedback Directed Optimization) options.
 
-TARGET_FDO_CFLAGS:=
-TARGET_FDO_LIB:=
+$(combo_2nd_arch_prefix)TARGET_FDO_CFLAGS:=
+$(combo_2nd_arch_prefix)TARGET_FDO_LIB:=
 
 ifneq ($(strip $(BUILD_FDO_INSTRUMENT)),)
   # Set BUILD_FDO_INSTRUMENT=true to turn on FDO instrumentation.
   # The profile will be generated on /data/local/tmp/profile on the device.
-  TARGET_FDO_CFLAGS := -fprofile-generate=/data/local/tmp/profile -DANDROID_FDO
-  TARGET_FDO_LIB := $(target_libgcov)
+  $(combo_2nd_arch_prefix)TARGET_FDO_CFLAGS := -fprofile-generate=/data/local/tmp/profile -DANDROID_FDO
+  $(combo_2nd_arch_prefix)TARGET_FDO_LIB := $(target_libgcov)
 else
   # If BUILD_FDO_INSTRUMENT is turned off, then consider doing the FDO optimizations.
   # Set TARGET_FDO_PROFILE_PATH to set a custom profile directory for your build.
-  ifeq ($(strip $(TARGET_FDO_PROFILE_PATH)),)
-    TARGET_FDO_PROFILE_PATH := fdo/profiles/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT)
+  ifeq ($(strip $($(combo_2nd_arch_prefix)TARGET_FDO_PROFILE_PATH)),)
+    $(combo_2nd_arch_prefix)TARGET_FDO_PROFILE_PATH := fdo/profiles/$(TARGET_$(combo_2nd_arch_prefix)ARCH)/$(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT)
   else
-    ifeq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),)
-      $(warning Custom TARGET_FDO_PROFILE_PATH supplied, but directory does not exist. Turn off FDO.)
+    ifeq ($(strip $(wildcard $($(combo_2nd_arch_prefix)TARGET_FDO_PROFILE_PATH))),)
+      $(warning Custom $(combo_2nd_arch_prefix)TARGET_FDO_PROFILE_PATH supplied, but directory does not exist. Turn off FDO.)
     endif
   endif
 
   # If the FDO profile directory can't be found, then FDO is off.
-  ifneq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),)
-    TARGET_FDO_CFLAGS := -fprofile-use=$(TARGET_FDO_PROFILE_PATH) -DANDROID_FDO
-    TARGET_FDO_LIB := $(target_libgcov)
+  ifneq ($(strip $(wildcard $($(combo_2nd_arch_prefix)TARGET_FDO_PROFILE_PATH))),)
+    $(combo_2nd_arch_prefix)TARGET_FDO_CFLAGS := -fprofile-use=$($(combo_2nd_arch_prefix)TARGET_FDO_PROFILE_PATH) -DANDROID_FDO
+    $(combo_2nd_arch_prefix)TARGET_FDO_LIB := $(target_libgcov)
   endif
 endif
 
@@ -190,7 +190,7 @@
 KERNEL_HEADERS_ARCH   := $(libc_root)/kernel/uapi/asm-mips # mips covers both mips and mips64.
 KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH)
 
-TARGET_C_INCLUDES := \
+$(combo_2nd_arch_prefix)TARGET_C_INCLUDES := \
 	$(libc_root)/arch-mips/include \
 	$(libc_root)/include \
 	$(libstdc++_root)/include \
@@ -198,20 +198,20 @@
 	$(libm_root)/include \
 	$(libm_root)/include/mips \
 
-TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o
-TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o
-TARGET_CRTEND_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o
+$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_STATIC_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o
+$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_DYNAMIC_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o
+$(combo_2nd_arch_prefix)TARGET_CRTEND_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o
 
-TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o
-TARGET_CRTEND_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o
+$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_SO_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o
+$(combo_2nd_arch_prefix)TARGET_CRTEND_SO_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o
 
-TARGET_STRIP_MODULE:=true
+$(combo_2nd_arch_prefix)TARGET_STRIP_MODULE:=true
 
-TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm
+$(combo_2nd_arch_prefix)TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm
 
-TARGET_CUSTOM_LD_COMMAND := true
+$(combo_2nd_arch_prefix)TARGET_CUSTOM_LD_COMMAND := true
 
-define transform-o-to-shared-lib-inner
+define $(combo_2nd_arch_prefix)transform-o-to-shared-lib-inner
 $(hide) $(PRIVATE_CXX) \
 	-nostdlib -Wl,-soname,$(notdir $@) \
 	-Wl,--gc-sections \
@@ -235,13 +235,13 @@
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O))
 endef
 
-define transform-o-to-executable-inner
+define $(combo_2nd_arch_prefix)transform-o-to-executable-inner
 $(hide) $(PRIVATE_CXX) -nostdlib -Bdynamic -fPIE -pie \
 	-Wl,-dynamic-linker,/system/bin/linker \
 	-Wl,--gc-sections \
 	-Wl,-z,nocopyreloc \
 	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
-	-Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \
+	-Wl,-rpath-link=$(PRIVATE_TARGET_OUT_INTERMEDIATE_LIBRARIES) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O)) \
 	$(PRIVATE_ALL_OBJECTS) \
 	-Wl,--whole-archive \
@@ -260,7 +260,7 @@
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))
 endef
 
-define transform-o-to-static-executable-inner
+define $(combo_2nd_arch_prefix)transform-o-to-static-executable-inner
 $(hide) $(PRIVATE_CXX) -nostdlib -Bstatic \
 	-Wl,--gc-sections \
 	-o $@ \
diff --git a/core/combo/TARGET_linux-mips64.mk b/core/combo/TARGET_linux-mips64.mk
index 8e6cb84..c1c6439 100644
--- a/core/combo/TARGET_linux-mips64.mk
+++ b/core/combo/TARGET_linux-mips64.mk
@@ -250,7 +250,7 @@
 	-Wl,--gc-sections \
 	-Wl,-z,nocopyreloc \
 	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
-	-Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \
+	-Wl,-rpath-link=$(PRIVATE_TARGET_OUT_INTERMEDIATE_LIBRARIES) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O)) \
 	$(PRIVATE_ALL_OBJECTS) \
 	-Wl,--whole-archive \
diff --git a/core/combo/TARGET_linux-x86.mk b/core/combo/TARGET_linux-x86.mk
old mode 100755
new mode 100644
index 801f882..37795ff
--- a/core/combo/TARGET_linux-x86.mk
+++ b/core/combo/TARGET_linux-x86.mk
@@ -18,56 +18,56 @@
 # Included by combo/select.mk
 
 # Provide a default variant.
-ifeq ($(strip $(TARGET_ARCH_VARIANT)),)
-TARGET_ARCH_VARIANT := x86
+ifeq ($(strip $(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT)),)
+TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT := x86
 endif
 
 ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),)
-TARGET_GCC_VERSION := 4.8
+$(combo_2nd_arch_prefix)TARGET_GCC_VERSION := 4.8
 else
-TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
+$(combo_2nd_arch_prefix)TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
 endif
 
 # Include the arch-variant-specific configuration file.
 # Its role is to define various ARCH_X86_HAVE_XXX feature macros,
 # plus initial values for TARGET_GLOBAL_CFLAGS
 #
-TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk
+TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_$(combo_2nd_arch_prefix)ARCH)/$(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT).mk
 ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),)
-$(error Unknown $(TARGET_ARCH) architecture version: $(TARGET_ARCH_VARIANT))
+$(error Unknown $(TARGET_$(combo_2nd_arch_prefix)ARCH) architecture version: $(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT))
 endif
 
 include $(TARGET_ARCH_SPECIFIC_MAKEFILE)
 
 
 # You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else
-ifeq ($(strip $(TARGET_TOOLS_PREFIX)),)
-TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/x86/x86_64-linux-android-$(TARGET_GCC_VERSION)
-TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/x86_64-linux-android-
+ifeq ($(strip $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)),)
+$(combo_2nd_arch_prefix)TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/x86/x86_64-linux-android-$($(combo_2nd_arch_prefix)TARGET_GCC_VERSION)
+$(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX := $($(combo_2nd_arch_prefix)TARGET_TOOLCHAIN_ROOT)/bin/x86_64-linux-android-
 endif
 
-TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)
-TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX)
-TARGET_AR := $(TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX)
-TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX)
-TARGET_LD := $(TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX)
-TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX)
+$(combo_2nd_arch_prefix)TARGET_CC := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)
+$(combo_2nd_arch_prefix)TARGET_CXX := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX)
+$(combo_2nd_arch_prefix)TARGET_AR := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX)
+$(combo_2nd_arch_prefix)TARGET_OBJCOPY := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX)
+$(combo_2nd_arch_prefix)TARGET_LD := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX)
+$(combo_2nd_arch_prefix)TARGET_STRIP := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX)
 
 ifeq ($(TARGET_BUILD_VARIANT),user)
-TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-debug $< -o $@
+$(combo_2nd_arch_prefix)TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-all $< -o $@
 else
-TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-debug $< -o $@ && \
+$(combo_2nd_arch_prefix)TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-all $< -o $@ && \
     $(PRIVATE_OBJCOPY) --add-gnu-debuglink=$< $@
 endif
 
-ifneq ($(wildcard $(TARGET_CC)),)
-TARGET_LIBGCC := \
-	$(shell $(TARGET_CC) -m32 -print-file-name=libgcc.a)
-target_libgcov := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \
+ifneq ($(wildcard $($(combo_2nd_arch_prefix)TARGET_CC)),)
+$(combo_2nd_arch_prefix)TARGET_LIBGCC := \
+	$(shell $($(combo_2nd_arch_prefix)TARGET_CC) -m32 -print-file-name=libgcc.a)
+target_libgcov := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) \
 	-print-file-name=libgcov.a)
 endif
 
-TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined
+$(combo_2nd_arch_prefix)TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined
 
 libc_root := bionic/libc
 libm_root := bionic/libm
@@ -75,29 +75,29 @@
 
 # Define FDO (Feedback Directed Optimization) options.
 
-TARGET_FDO_CFLAGS:=
-TARGET_FDO_LIB:=
+$(combo_2nd_arch_prefix)TARGET_FDO_CFLAGS:=
+$(combo_2nd_arch_prefix)TARGET_FDO_LIB:=
 
 ifneq ($(strip $(BUILD_FDO_INSTRUMENT)),)
   # Set BUILD_FDO_INSTRUMENT=true to turn on FDO instrumentation.
   # The profile will be generated on /data/local/tmp/profile on the device.
-  TARGET_FDO_CFLAGS := -fprofile-generate=/data/local/tmp/profile -DANDROID_FDO
-  TARGET_FDO_LIB := $(target_libgcov)
+  $(combo_2nd_arch_prefix)TARGET_FDO_CFLAGS := -fprofile-generate=/data/local/tmp/profile -DANDROID_FDO
+  $(combo_2nd_arch_prefix)TARGET_FDO_LIB := $(target_libgcov)
 else
   # If BUILD_FDO_INSTRUMENT is turned off, then consider doing the FDO optimizations.
   # Set TARGET_FDO_PROFILE_PATH to set a custom profile directory for your build.
-  ifeq ($(strip $(TARGET_FDO_PROFILE_PATH)),)
-    TARGET_FDO_PROFILE_PATH := fdo/profiles/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT)
+  ifeq ($(strip $($(combo_2nd_arch_prefix)TARGET_FDO_PROFILE_PATH)),)
+    $(combo_2nd_arch_prefix)TARGET_FDO_PROFILE_PATH := fdo/profiles/$(TARGET_$(combo_2nd_arch_prefix)ARCH)/$(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT)
   else
-    ifeq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),)
-      $(warning Custom TARGET_FDO_PROFILE_PATH supplied, but directory does not exist. Turn off FDO.)
+    ifeq ($(strip $(wildcard $($(combo_2nd_arch_prefix)TARGET_FDO_PROFILE_PATH))),)
+      $(warning Custom $(combo_2nd_arch_prefix)TARGET_FDO_PROFILE_PATH supplied, but directory does not exist. Turn off FDO.)
     endif
   endif
 
   # If the FDO profile directory can't be found, then FDO is off.
-  ifneq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),)
-    TARGET_FDO_CFLAGS := -fprofile-use=$(TARGET_FDO_PROFILE_PATH) -DANDROID_FDO
-    TARGET_FDO_LIB := $(target_libgcov)
+  ifneq ($(strip $(wildcard $($(combo_2nd_arch_prefix)TARGET_FDO_PROFILE_PATH))),)
+    $(combo_2nd_arch_prefix)TARGET_FDO_CFLAGS := -fprofile-use=$($(combo_2nd_arch_prefix)TARGET_FDO_PROFILE_PATH) -DANDROID_FDO
+    $(combo_2nd_arch_prefix)TARGET_FDO_LIB := $(target_libgcov)
   endif
 endif
 
@@ -107,7 +107,7 @@
 
 android_config_h := $(call select-android-config-h,target_linux-x86)
 
-TARGET_GLOBAL_CFLAGS += \
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += \
 			-O2 \
 			-Ulinux \
 			-Wa,--noexecstack \
@@ -125,39 +125,40 @@
 			-funwind-tables \
 			-fstack-protector \
 			-m32 \
+			-msse2 \
 			-include $(android_config_h) \
 			-I $(dir $(android_config_h))
 
-TARGET_GLOBAL_CFLAGS += $(arch_variant_cflags)
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += $(arch_variant_cflags)
 
 ifeq ($(ARCH_X86_HAVE_SSSE3),true)   # yes, really SSSE3, not SSE3!
-    TARGET_GLOBAL_CFLAGS += -DUSE_SSSE3 -mssse3
+    $(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -DUSE_SSSE3 -mssse3
 endif
 ifeq ($(ARCH_X86_HAVE_SSE4),true)
-    TARGET_GLOBAL_CFLAGS += -msse4
+    $(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -msse4
 endif
 ifeq ($(ARCH_X86_HAVE_SSE4_1),true)
-    TARGET_GLOBAL_CFLAGS += -msse4.1
+    $(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -msse4.1
 endif
 ifeq ($(ARCH_X86_HAVE_SSE4_2),true)
-    TARGET_GLOBAL_CFLAGS += -msse4.2
+    $(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -msse4.2
 endif
 ifeq ($(ARCH_X86_HAVE_AVX),true)
-    TARGET_GLOBAL_CFLAGS += -mavx
+    $(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -mavx
 endif
 ifeq ($(ARCH_X86_HAVE_AES_NI),true)
-    TARGET_GLOBAL_CFLAGS += -maes
+    $(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -maes
 endif
 
-TARGET_GLOBAL_LDFLAGS += -m32
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_LDFLAGS += -m32
 
-TARGET_GLOBAL_LDFLAGS += -Wl,-z,noexecstack
-TARGET_GLOBAL_LDFLAGS += -Wl,-z,relro -Wl,-z,now
-TARGET_GLOBAL_LDFLAGS += -Wl,--warn-shared-textrel
-TARGET_GLOBAL_LDFLAGS += -Wl,--fatal-warnings
-TARGET_GLOBAL_LDFLAGS += -Wl,--gc-sections
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_LDFLAGS += -Wl,-z,noexecstack
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_LDFLAGS += -Wl,-z,relro -Wl,-z,now
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_LDFLAGS += -Wl,--warn-shared-textrel
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_LDFLAGS += -Wl,--fatal-warnings
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_LDFLAGS += -Wl,--gc-sections
 
-TARGET_C_INCLUDES := \
+$(combo_2nd_arch_prefix)TARGET_C_INCLUDES := \
 	$(libc_root)/arch-x86/include \
 	$(libc_root)/include \
 	$(libstdc++_root)/include \
@@ -165,24 +166,23 @@
 	$(libm_root)/include \
 	$(libm_root)/include/i387 \
 
-TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o
-TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o
-TARGET_CRTEND_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o
+$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_STATIC_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o
+$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_DYNAMIC_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o
+$(combo_2nd_arch_prefix)TARGET_CRTEND_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o
 
-TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o
-TARGET_CRTEND_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o
+$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_SO_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o
+$(combo_2nd_arch_prefix)TARGET_CRTEND_SO_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o
 
-TARGET_STRIP_MODULE:=true
+$(combo_2nd_arch_prefix)TARGET_STRIP_MODULE:=true
 
-TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm
+$(combo_2nd_arch_prefix)TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm
 
-TARGET_CUSTOM_LD_COMMAND := true
-define transform-o-to-shared-lib-inner
+$(combo_2nd_arch_prefix)TARGET_CUSTOM_LD_COMMAND := true
+define $(combo_2nd_arch_prefix)transform-o-to-shared-lib-inner
 $(hide) $(PRIVATE_CXX) \
 	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	 -nostdlib -Wl,-soname,$(notdir $@) \
 	 -shared -Bsymbolic \
-	$(TARGET_GLOBAL_CFLAGS) \
 	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \
 	$(PRIVATE_ALL_OBJECTS) \
@@ -201,14 +201,14 @@
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O))
 endef
 
-define transform-o-to-executable-inner
+define $(combo_2nd_arch_prefix)transform-o-to-executable-inner
 $(hide) $(PRIVATE_CXX) \
 	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	-nostdlib -Bdynamic \
 	-Wl,-z,nocopyreloc \
 	-fPIE -pie \
 	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
-	-Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \
+	-Wl,-rpath-link=$(PRIVATE_TARGET_OUT_INTERMEDIATE_LIBRARIES) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O)) \
 	$(PRIVATE_ALL_OBJECTS) \
 	-Wl,--whole-archive \
@@ -226,7 +226,7 @@
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))
 endef
 
-define transform-o-to-static-executable-inner
+define $(combo_2nd_arch_prefix)transform-o-to-static-executable-inner
 $(hide) $(PRIVATE_CXX) \
 	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	-nostdlib -Bstatic \
diff --git a/core/combo/TARGET_linux-x86_64.mk b/core/combo/TARGET_linux-x86_64.mk
old mode 100755
new mode 100644
index 6a29762..8e6a653
--- a/core/combo/TARGET_linux-x86_64.mk
+++ b/core/combo/TARGET_linux-x86_64.mk
@@ -23,7 +23,7 @@
 endif
 
 ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),)
-TARGET_GCC_VERSION := 4.7
+TARGET_GCC_VERSION := 4.8
 else
 TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
 endif
@@ -56,9 +56,9 @@
 TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX)
 
 ifeq ($(TARGET_BUILD_VARIANT),user)
-TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-debug $< -o $@
+TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-all $< -o $@
 else
-TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-debug $< -o $@ && \
+TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-all $< -o $@ && \
 	$(PRIVATE_OBJCOPY) --add-gnu-debuglink=$< $@
 endif
 
@@ -188,7 +188,6 @@
 	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	 -nostdlib -Wl,-soname,$(notdir $@) \
 	 -shared -Bsymbolic \
-	$(TARGET_GLOBAL_CFLAGS) \
 	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \
 	$(PRIVATE_ALL_OBJECTS) \
@@ -214,7 +213,7 @@
 	-Wl,-z,nocopyreloc \
 	-fPIE -pie \
 	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
-	-Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \
+	-Wl,-rpath-link=$(PRIVATE_TARGET_OUT_INTERMEDIATE_LIBRARIES) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O)) \
 	$(PRIVATE_ALL_OBJECTS) \
 	-Wl,--whole-archive \
diff --git a/core/config.mk b/core/config.mk
index a1bae47..5621778 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -438,16 +438,16 @@
 TARGET_GLOBAL_CPPFLAGS += $(TARGET_RELEASE_CPPFLAGS)
 
 ifdef TARGET_2ND_ARCH
-$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += $(COMMON_GLOBAL_CFLAGS)
-$(combo_2nd_arch_prefix)TARGET_RELEASE_CFLAGS += $(COMMON_RELEASE_CFLAGS)
-$(combo_2nd_arch_prefix)TARGET_GLOBAL_CPPFLAGS += $(COMMON_GLOBAL_CPPFLAGS)
-$(combo_2nd_arch_prefix)TARGET_RELEASE_CPPFLAGS += $(COMMON_RELEASE_CPPFLAGS)
-$(combo_2nd_arch_prefix)TARGET_GLOBAL_LD_DIRS += -L$($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)
-$(combo_2nd_arch_prefix)TARGET_PROJECT_INCLUDES := $(TARGET_PROJECT_INCLUDES)
-$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += $(TARGET_ERROR_FLAGS)
-$(combo_2nd_arch_prefix)TARGET_GLOBAL_CPPFLAGS += $(TARGET_ERROR_FLAGS)
-$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += $($(combo_2nd_arch_prefix)TARGET_RELEASE_CFLAGS)
-$(combo_2nd_arch_prefix)TARGET_GLOBAL_CPPFLAGS += $($(combo_2nd_arch_prefix)TARGET_RELEASE_CPPFLAGS)
+$(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_CFLAGS += $(COMMON_GLOBAL_CFLAGS)
+$(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_RELEASE_CFLAGS += $(COMMON_RELEASE_CFLAGS)
+$(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_CPPFLAGS += $(COMMON_GLOBAL_CPPFLAGS)
+$(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_RELEASE_CPPFLAGS += $(COMMON_RELEASE_CPPFLAGS)
+$(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_LD_DIRS += -L$($(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_INTERMEDIATE_LIBRARIES)
+$(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_PROJECT_INCLUDES := $(TARGET_PROJECT_INCLUDES)
+$(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_CFLAGS += $(TARGET_ERROR_FLAGS)
+$(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_CPPFLAGS += $(TARGET_ERROR_FLAGS)
+$(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_CFLAGS += $($(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_RELEASE_CFLAGS)
+$(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_CPPFLAGS += $($(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_RELEASE_CPPFLAGS)
 endif
 
 # allow overriding default Java libraries on a per-target basis
diff --git a/core/definitions.mk b/core/definitions.mk
index b34e274..6c65bc5 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -275,6 +275,19 @@
 endef
 
 ###########################################################
+## Find all of the S files under the named directories.
+## Meant to be used like:
+##    SRC_FILES := $(call all-c-files-under,src tests)
+###########################################################
+
+define all-S-files-under
+$(patsubst ./%,%, \
+  $(shell cd $(LOCAL_PATH) ; \
+          find -L $(1) -name "*.S" -and -not -name ".*") \
+ )
+endef
+
+###########################################################
 ## Find all of the html files under the named directories.
 ## Meant to be used like:
 ##    SRC_FILES := $(call all-html-files-under,src tests)
@@ -386,36 +399,6 @@
 endef
 
 ###########################################################
-## Set up the dependencies for a prebuilt target
-##  $(call add-prebuilt-file, srcfile, [targetclass])
-###########################################################
-
-define add-prebuilt-file
-    $(eval $(include-prebuilt))
-endef
-
-define include-prebuilt
-    include $$(CLEAR_VARS)
-    LOCAL_SRC_FILES := $(1)
-    LOCAL_BUILT_MODULE_STEM := $(1)
-    LOCAL_MODULE_SUFFIX := $$(suffix $(1))
-    LOCAL_MODULE := $$(basename $(1))
-    LOCAL_MODULE_CLASS := $(2)
-    include $$(BUILD_PREBUILT)
-endef
-
-###########################################################
-## do multiple prebuilts
-##  $(call target class, files ...)
-###########################################################
-
-define add-prebuilt-files
-    $(foreach f,$(2),$(call add-prebuilt-file,$f,$(1)))
-endef
-
-
-
-###########################################################
 ## The intermediates directory.  Where object files go for
 ## a given target.  We could technically get away without
 ## the "_intermediates" suffix on the directory, but it's
@@ -437,11 +420,13 @@
     $(if $(_idfName),, \
         $(error $(LOCAL_PATH): Name not defined in call to intermediates-dir-for)) \
     $(eval _idfPrefix := $(if $(strip $(3)),HOST,TARGET)) \
-    $(eval _idf2ndArchPrefix := $(if $(strip $(5)),$(TARGET_2ND_ARCH_VAR_PREFIX))) \
+    $(eval _idf2ndArchPrefix := $(if $(call directory_is_64_bit_blacklisted,$(LOCAL_PATH))$(strip $(5)),$(TARGET_2ND_ARCH_VAR_PREFIX))) \
     $(if $(filter $(_idfPrefix)-$(_idfClass),$(COMMON_MODULE_CLASSES))$(4), \
         $(eval _idfIntBase := $($(_idfPrefix)_OUT_COMMON_INTERMEDIATES)) \
-      , \
-        $(eval _idfIntBase := $($(_idf2ndArchPrefix)$(_idfPrefix)_OUT_INTERMEDIATES)) \
+      ,$(if $(filter $(_idfPrefix)-$(_idfClass),TARGET-SHARED_LIBRARIES TARGET-STATIC_LIBRARIES TARGET-EXECUTABLES),\
+          $(eval _idfIntBase := $($(_idf2ndArchPrefix)$(_idfPrefix)_OUT_INTERMEDIATES)) \
+       ,$(eval _idfIntBase := $($(_idfPrefix)_OUT_INTERMEDIATES)) \
+       ) \
      ) \
     $(_idfIntBase)/$(_idfClass)/$(_idfName)_intermediates \
 )
@@ -1305,7 +1290,7 @@
 define transform-o-to-shared-lib-inner
 $(hide) $(PRIVATE_CXX) \
 	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
-	-Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \
+	-Wl,-rpath-link=$(PRIVATE_TARGET_OUT_INTERMEDIATE_LIBRARIES) \
 	-Wl,-rpath,\$$ORIGIN/../lib \
 	-shared -Wl,-soname,$(notdir $@) \
 	$(PRIVATE_LDFLAGS) \
@@ -1350,7 +1335,7 @@
 $(hide) $(PRIVATE_CXX) \
 	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
-	-Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \
+	-Wl,-rpath-link=$(PRIVATE_TARGET_OUT_INTERMEDIATE_LIBRARIES) \
 	-Wl,-rpath,\$$ORIGIN/../lib \
 	$(PRIVATE_LDFLAGS) \
 	$(PRIVATE_ALL_OBJECTS) \
diff --git a/core/dumpvar.mk b/core/dumpvar.mk
index 2612e06..7af0a0c 100644
--- a/core/dumpvar.mk
+++ b/core/dumpvar.mk
@@ -9,31 +9,6 @@
 ABP:=$(PWD)/$(HOST_OUT_EXECUTABLES)
 endif
 
-# Add the ARM toolchain bin dir if it actually exists
-ifeq ($(TARGET_ARCH),arm)
-    ifneq ($(wildcard $(PWD)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/arm/arm-linux-androideabi-$(TARGET_GCC_VERSION)/bin),)
-        # this should be copied to HOST_OUT_EXECUTABLES instead
-        ABP:=$(ABP):$(PWD)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/arm/arm-linux-androideabi-$(TARGET_GCC_VERSION)/bin
-    endif
-    ifneq ($(wildcard $(PWD)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/arm/arm-eabi-$(TARGET_GCC_VERSION)/bin),)
-        # this should be copied to HOST_OUT_EXECUTABLES instead
-        ABP:=$(ABP):$(PWD)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/arm/arm-eabi-$(TARGET_GCC_VERSION)/bin
-    endif
-else ifeq ($(TARGET_ARCH),x86)
-
-# Add the x86 toolchain bin dir if it actually exists
-    ifneq ($(wildcard $(PWD)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/x86/x86_64-linux-android-$(TARGET_GCC_VERSION)/bin),)
-        # this should be copied to HOST_OUT_EXECUTABLES instead
-        ABP:=$(ABP):$(PWD)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/x86/x86_64-linux-android-$(TARGET_GCC_VERSION)/bin
-    endif
-endif
-
-# Add the mips toolchain bin dir if it actually exists
-ifneq ($(wildcard $(PWD)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/mips/mipsel-linux-android-$(TARGET_GCC_VERSION)/bin),)
-    # this should be copied to HOST_OUT_EXECUTABLES instead
-    ABP:=$(ABP):$(PWD)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/mips/mipsel-linux-android-$(TARGET_GCC_VERSION)/bin
-endif
-
 ANDROID_BUILD_PATHS := $(ABP)
 ANDROID_PREBUILTS := prebuilt/$(HOST_PREBUILT_TAG)
 ANDROID_GCC_PREBUILTS := prebuilts/gcc/$(HOST_PREBUILT_TAG)
diff --git a/core/executable.mk b/core/executable.mk
index 6d8734e..899a02f 100644
--- a/core/executable.mk
+++ b/core/executable.mk
@@ -3,13 +3,30 @@
 # By default, an executable is built for TARGET_ARCH.
 # To build it for TARGET_2ND_ARCH in a 64bit product, use "LOCAL_32_BIT_ONLY := true".
 
-ifeq ($(TARGET_IS_64_BIT)|$(LOCAL_32_BIT_ONLY),true|true)
-LOCAL_2ND_ARCH_VAR_PREFIX := $(TARGET_2ND_ARCH_VAR_PREFIX)
-else
-LOCAL_2ND_ARCH_VAR_PREFIX :=
+ifeq ($(TARGET_PREFER_32_BIT),true)
+ifneq ($(LOCAL_NO_2ND_ARCH),true)
+LOCAL_32_BIT_ONLY := true
+endif
 endif
 
 LOCAL_NO_2ND_ARCH_MODULE_SUFFIX := true
+
+# check if primary arch is supported
+include $(BUILD_SYSTEM)/module_arch_supported.mk
+ifeq ($(my_module_arch_supported),true)
+# primary arch is supported
 include $(BUILD_SYSTEM)/executable_internal.mk
+else ifneq (,$(TARGET_2ND_ARCH))
+# check if secondary arch is supported
+LOCAL_2ND_ARCH_VAR_PREFIX := $(TARGET_2ND_ARCH_VAR_PREFIX)
+include $(BUILD_SYSTEM)/module_arch_supported.mk
+ifeq ($(my_module_arch_supported),true)
+# secondary arch is supported
+include $(BUILD_SYSTEM)/executable_internal.mk
+endif
+endif # TARGET_2ND_ARCH
+
 LOCAL_2ND_ARCH_VAR_PREFIX :=
 LOCAL_NO_2ND_ARCH_MODULE_SUFFIX :=
+
+my_module_arch_supported :=
diff --git a/core/executable_internal.mk b/core/executable_internal.mk
index f2cb4a9..1edcd2c 100644
--- a/core/executable_internal.mk
+++ b/core/executable_internal.mk
@@ -57,6 +57,7 @@
 $(linked_module): PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O := $(my_target_crtbegin_dynamic_o)
 $(linked_module): PRIVATE_TARGET_CRTBEGIN_STATIC_O := $(my_target_crtbegin_static_o)
 $(linked_module): PRIVATE_TARGET_CRTEND_O := $(my_target_crtend_o)
+$(linked_module): PRIVATE_TARGET_OUT_INTERMEDIATE_LIBRARIES := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_OUT_INTERMEDIATE_LIBRARIES)
 
 ifeq ($(LOCAL_FORCE_STATIC_EXECUTABLE),true)
 $(linked_module): $(my_target_crtbegin_static_o) $(all_objects) $(all_libraries) $(my_target_crtend_o)
diff --git a/core/host_shared_library.mk b/core/host_shared_library.mk
index a29e14c..a608251 100644
--- a/core/host_shared_library.mk
+++ b/core/host_shared_library.mk
@@ -44,3 +44,8 @@
 	$(transform-host-o-to-shared-lib)
 
 endif  # skip_build_from_source
+
+###########################################################
+## Copy headers to the install tree
+###########################################################
+include $(BUILD_COPY_HEADERS)
diff --git a/core/host_static_library.mk b/core/host_static_library.mk
index a533cf5..7d9b375 100644
--- a/core/host_static_library.mk
+++ b/core/host_static_library.mk
@@ -25,3 +25,8 @@
 $(LOCAL_BUILT_MODULE): $(built_whole_libraries)
 $(LOCAL_BUILT_MODULE): $(all_objects)
 	$(transform-host-o-to-static-lib)
+
+###########################################################
+## Copy headers to the install tree
+###########################################################
+include $(BUILD_COPY_HEADERS)
diff --git a/core/main.mk b/core/main.mk
index b593acd..d568f8a 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -92,6 +92,8 @@
 # and host information.
 include $(BUILD_SYSTEM)/config.mk
 
+include $(BUILD_SYSTEM)/64_bit_blacklist.mk
+
 # This allows us to force a clean build - included after the config.mk
 # environment setup is done, but before we generate any dependencies.  This
 # file does the rm -rf inline so the deps which are all done below will
@@ -571,9 +573,49 @@
 # APPS:Quake or HOST:SHARED_LIBRARIES:libutils.
 # BUG: the system image won't know to depend on modules that are
 # brought in as requirements of other modules.
+#
+# Resolve the required module name to 32-bit or 64-bit variant.
+ifeq ($(TARGET_IS_64_BIT),true)
+# Get a list of corresponding 32-bit module names, if one exists.
+define get-32-bit-modules
+$(strip $(foreach m,$(1),\
+  $(if $(ALL_MODULES.$(m)$(TARGET_2ND_ARCH_MODULE_SUFFIX).CLASS),\
+    $(m)$(TARGET_2ND_ARCH_MODULE_SUFFIX))))
+endef
+# Get a list of corresponding 32-bit module names, if one exists;
+# otherwise return the original module name
+define get-32-bit-modules-if-we-can
+$(strip $(foreach m,$(1),\
+  $(if $(ALL_MODULES.$(m)$(TARGET_2ND_ARCH_MODULE_SUFFIX).CLASS),\
+    $(m)$(TARGET_2ND_ARCH_MODULE_SUFFIX),
+    $(m))))
+endef
+
+# If a module is built for 32-bit, the required modules must be 32-bit too;
+# Otherwise if the module is an exectuable or shared library,
+#   the required modules must be 64-bit;
+#   otherwise we require both 64-bit and 32-bit variant, if one exists.
+$(foreach m,$(ALL_MODULES),\
+  $(eval r := $(ALL_MODULES.$(m).REQUIRED))\
+  $(if $(r),\
+    $(if $(ALL_MODULES.$(m).FOR_2ND_ARCH),\
+      $(eval r_r := $(call get-32-bit-modules-if-we-can,$(r))),\
+      $(if $(filter EXECUTABLES SHARED_LIBRARIES,$(ALL_MODULES.$(m).CLASS)),\
+        $(eval r_r := $(r)),\
+        $(eval r_r := $(r) $(call get-32-bit-modules,$(r)))\
+       )\
+     )\
+     $(eval ALL_MODULES.$(m).REQUIRED := $(r_r))\
+  )\
+)
+r_r :=
+endif
+
+
 define add-required-deps
 $(1): | $(2)
 endef
+
 $(foreach m,$(ALL_MODULES), \
   $(eval r := $(ALL_MODULES.$(m).REQUIRED)) \
   $(if $(r), \
@@ -628,11 +670,26 @@
 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.make.
+  # 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))
+  ifeq ($(TARGET_IS_64_BIT),true)
+    product_MODULES := $(addsuffix $(TARGET_2ND_ARCH_MODULE_SUFFIX),$(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)
+  else
+    product_MODULES := $(modules_32) $(modules_64) $(modules_rest)
+  endif
+
   $(call expand-required-modules,product_MODULES,$(product_MODULES))
   product_FILES := $(call module-installed-files, $(product_MODULES))
   ifeq (0,1)
@@ -698,9 +755,17 @@
 
   # Ensure every module listed in PRODUCT_PACKAGES* gets something installed
   # TODO: Should we do this for all builds and not just the sdk?
+  dangling_modules :=
   $(foreach m, $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_PACKAGES), \
     $(if $(strip $(ALL_MODULES.$(m).INSTALLED)),,\
-      $(error $(ALL_MODULES.$(m).MAKEFILE): Module '$(m)' in PRODUCT_PACKAGES has nothing to install!)))
+      $(eval dangling_modules += $(m))))
+  ifneq ($(TARGET_IS_64_BIT),true)
+    # We know those 64-bit modules don't exist in the 32-bit SDK build.
+    dangling_modules := $(filter-out %64,$(dangling_modules))
+  endif
+  ifneq ($(dangling_modules),)
+    $(error Module names '$(dangling_modules)' in PRODUCT_PACKAGES has nothing to install!)
+  endif
   $(foreach m, $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_PACKAGES_DEBUG), \
     $(if $(strip $(ALL_MODULES.$(m).INSTALLED)),,\
       $(warning $(ALL_MODULES.$(m).MAKEFILE): Module '$(m)' in PRODUCT_PACKAGES_DEBUG has nothing to install!)))
diff --git a/core/module_arch_supported.mk b/core/module_arch_supported.mk
new file mode 100644
index 0000000..ddfd67d
--- /dev/null
+++ b/core/module_arch_supported.mk
@@ -0,0 +1,54 @@
+###########################################################
+## Determine if a module can be built for an arch
+##
+## Inputs from module makefile:
+## LOCAL_32_BIT_ONLY
+## LOCAL_NO_2ND_ARCH
+## LOCAL_MODULE_TARGET_ARCH
+## LOCAL_MODULE_TARGET_ARCH_WARN
+## LOCAL_MODULE_UNSUPPORTED_TARGET_ARCH
+## LOCAL_MODULE_UNSUPPORTED_TARGET_ARCH_WARN
+##
+## Inputs from build system:
+## TARGET_IS_64_BIT
+## LOCAL_2ND_ARCH_VAR_PREFIX
+##
+## Outputs:
+## my_module_arch_supported := (true|false)
+###########################################################
+
+my_module_arch_supported := true
+
+ifeq ($(LOCAL_2ND_ARCH_VAR_PREFIX),)
+ifeq ($(TARGET_IS_64_BIT)|$(LOCAL_32_BIT_ONLY),true|true)
+my_module_arch_supported := false
+else ifeq ($(call directory_is_64_bit_blacklisted,$(LOCAL_PATH)),true)
+my_module_arch_supported := false
+endif
+else # LOCAL_2ND_ARCH_VAR_PREFIX
+ifeq ($(LOCAL_NO_2ND_ARCH),true)
+my_module_arch_supported := false
+endif
+endif # !LOCAL_2ND_ARCH_VAR_PREFIX
+
+ifneq (,$(LOCAL_MODULE_TARGET_ARCH))
+ifeq (,$(filter $(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH),$(LOCAL_MODULE_TARGET_ARCH)))
+my_module_arch_supported := false
+endif
+endif
+
+ifneq (,$(LOCAL_MODULE_TARGET_ARCH_WARN))
+ifeq (,$(filter $(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH),$(LOCAL_MODULE_TARGET_ARCH_WARN)))
+my_module_arch_supported := false
+$(warning $(LOCAL_MODULE): architecture $(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH) not supported)
+endif
+endif
+
+ifneq (,$(filter $(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH),$(LOCAL_MODULE_UNSUPPORTED_TARGET_ARCH)))
+my_module_arch_supported := false
+endif
+
+ifneq (,$(filter $(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH),$(LOCAL_MODULE_UNSUPPORTED_TARGET_ARCH_WARN)))
+my_module_arch_supported := false
+$(warning $(LOCAL_MODULE): architecture $(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH) unsupported)
+endif
diff --git a/core/package.mk b/core/package.mk
index f678b3c..b40ac37 100644
--- a/core/package.mk
+++ b/core/package.mk
@@ -1,481 +1,27 @@
-#
-# Copyright (C) 2008 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-###########################################################
-## Standard rules for building an application package.
-##
-## Additional inputs from base_rules.make:
-## LOCAL_PACKAGE_NAME: The name of the package; the directory
-## will be called this.
-##
-## MODULE, MODULE_PATH, and MODULE_SUFFIX will
-## be set for you.
-###########################################################
-
-ifeq ($(TARGET_IS_64_BIT)|$(LOCAL_32_BIT_ONLY),true|true)
-LOCAL_2ND_ARCH_VAR_PREFIX := $(TARGET_2ND_ARCH_VAR_PREFIX)
-else
-LOCAL_2ND_ARCH_VAR_PREFIX :=
-endif
+# We don't automatically set up rules to build packages for both
+# TARGET_ARCH and TARGET_2ND_ARCH.
+# By default, an package is built for TARGET_ARCH.
+# To build it for TARGET_2ND_ARCH in a 64bit product, use "LOCAL_32_BIT_ONLY := true".
 
 LOCAL_NO_2ND_ARCH_MODULE_SUFFIX := true
 
-# If this makefile is being read from within an inheritance,
-# use the new values.
-skip_definition:=
-ifdef LOCAL_PACKAGE_OVERRIDES
-  package_overridden := $(call set-inherited-package-variables)
-  ifeq ($(strip $(package_overridden)),)
-    skip_definition := true
-  endif
+# check if primary arch is supported
+LOCAL_2ND_ARCH_VAR_PREFIX :=
+include $(BUILD_SYSTEM)/module_arch_supported.mk
+ifeq ($(my_module_arch_supported),true)
+# primary arch is supported
+include $(BUILD_SYSTEM)/package_internal.mk
+else ifneq (,$(TARGET_2ND_ARCH))
+# check if secondary arch is supported
+LOCAL_2ND_ARCH_VAR_PREFIX := $(TARGET_2ND_ARCH_VAR_PREFIX)
+include $(BUILD_SYSTEM)/module_arch_supported.mk
+ifeq ($(my_module_arch_supported),true)
+# secondary arch is supported
+include $(BUILD_SYSTEM)/package_internal.mk
 endif
-
-ifndef skip_definition
-
-LOCAL_PACKAGE_NAME := $(strip $(LOCAL_PACKAGE_NAME))
-ifeq ($(LOCAL_PACKAGE_NAME),)
-$(error $(LOCAL_PATH): Package modules must define LOCAL_PACKAGE_NAME)
-endif
-
-ifneq ($(strip $(LOCAL_MODULE_SUFFIX)),)
-$(error $(LOCAL_PATH): Package modules may not define LOCAL_MODULE_SUFFIX)
-endif
-LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX)
-
-ifneq ($(strip $(LOCAL_MODULE)),)
-$(error $(LOCAL_PATH): Package modules may not define LOCAL_MODULE)
-endif
-LOCAL_MODULE := $(LOCAL_PACKAGE_NAME)
-
-ifeq ($(strip $(LOCAL_MANIFEST_FILE)),)
-LOCAL_MANIFEST_FILE := AndroidManifest.xml
-endif
-
-# If you need to put the MANIFEST_FILE outside of LOCAL_PATH
-# you can use FULL_MANIFEST_FILE
-ifeq ($(strip $(LOCAL_FULL_MANIFEST_FILE)),)
-LOCAL_FULL_MANIFEST_FILE := $(LOCAL_PATH)/$(LOCAL_MANIFEST_FILE)
-endif
-
-ifneq ($(strip $(LOCAL_MODULE_CLASS)),)
-$(error $(LOCAL_PATH): Package modules may not set LOCAL_MODULE_CLASS)
-endif
-LOCAL_MODULE_CLASS := APPS
-
-# Package LOCAL_MODULE_TAGS default to optional
-LOCAL_MODULE_TAGS := $(strip $(LOCAL_MODULE_TAGS))
-ifeq ($(LOCAL_MODULE_TAGS),)
-LOCAL_MODULE_TAGS := optional
-endif
-
-ifeq ($(filter tests, $(LOCAL_MODULE_TAGS)),)
-# Force localization check if it's not tagged as tests.
-LOCAL_AAPT_FLAGS := $(LOCAL_AAPT_FLAGS) -z
-endif
-
-ifeq (,$(LOCAL_ASSET_DIR))
-LOCAL_ASSET_DIR := $(LOCAL_PATH)/assets
-endif
-
-ifeq (,$(LOCAL_RESOURCE_DIR))
-  LOCAL_RESOURCE_DIR := $(LOCAL_PATH)/res
-endif
-
-package_resource_overlays := $(strip \
-    $(wildcard $(foreach dir, $(PRODUCT_PACKAGE_OVERLAYS), \
-      $(addprefix $(dir)/, $(LOCAL_RESOURCE_DIR)))) \
-    $(wildcard $(foreach dir, $(DEVICE_PACKAGE_OVERLAYS), \
-      $(addprefix $(dir)/, $(LOCAL_RESOURCE_DIR)))))
-
-LOCAL_RESOURCE_DIR := $(package_resource_overlays) $(LOCAL_RESOURCE_DIR)
-
-all_assets := $(call find-subdir-assets,$(LOCAL_ASSET_DIR))
-all_assets := $(addprefix $(LOCAL_ASSET_DIR)/,$(patsubst assets/%,%,$(all_assets)))
-
-all_resources := $(strip \
-    $(foreach dir, $(LOCAL_RESOURCE_DIR), \
-      $(addprefix $(dir)/, \
-        $(patsubst res/%,%, \
-          $(call find-subdir-assets,$(dir)) \
-         ) \
-       ) \
-     ))
-
-all_res_assets := $(strip $(all_assets) $(all_resources))
-
-package_expected_intermediates_COMMON := $(call local-intermediates-dir,COMMON)
-# If no assets or resources were found, clear the directory variables so
-# we don't try to build them.
-ifeq (,$(all_assets))
-LOCAL_ASSET_DIR:=
-endif
-ifeq (,$(all_resources))
-LOCAL_RESOURCE_DIR:=
-R_file_stamp :=
-else
-# Make sure that R_file_stamp inherits the proper PRIVATE vars.
-# If R.stamp moves, be sure to update the framework makefile,
-# which has intimate knowledge of its location.
-R_file_stamp := $(package_expected_intermediates_COMMON)/src/R.stamp
-LOCAL_INTERMEDIATE_TARGETS += $(R_file_stamp)
-endif
-
-LOCAL_BUILT_MODULE_STEM := package.apk
-
-LOCAL_PROGUARD_ENABLED:=$(strip $(LOCAL_PROGUARD_ENABLED))
-ifndef LOCAL_PROGUARD_ENABLED
-ifneq ($(DISABLE_PROGUARD),true)
-    LOCAL_PROGUARD_ENABLED :=full
-endif
-endif
-ifeq ($(LOCAL_PROGUARD_ENABLED),disabled)
-    # the package explicitly request to disable proguard.
-    LOCAL_PROGUARD_ENABLED :=
-endif
-proguard_options_file :=
-ifneq ($(LOCAL_PROGUARD_ENABLED),custom)
-ifneq ($(all_resources),)
-    proguard_options_file := $(package_expected_intermediates_COMMON)/proguard_options
-endif # all_resources
-endif # !custom
-LOCAL_PROGUARD_FLAGS := $(addprefix -include ,$(proguard_options_file)) $(LOCAL_PROGUARD_FLAGS)
-
-ifeq (true,$(EMMA_INSTRUMENT))
-ifndef LOCAL_EMMA_INSTRUMENT
-# No emma for test apks.
-ifeq (,$(filer tests,$(LOCAL_MODULE_TAGS))$(LOCAL_INSTRUMENTATION_FOR))
-LOCAL_EMMA_INSTRUMENT := true
-endif # No test apk
-endif # LOCAL_EMMA_INSTRUMENT is not set
-else
-LOCAL_EMMA_INSTRUMENT := false
-endif # EMMA_INSTRUMENT is true
-
-ifeq (true,$(LOCAL_EMMA_INSTRUMENT))
-ifeq (true,$(EMMA_INSTRUMENT_STATIC))
-LOCAL_STATIC_JAVA_LIBRARIES += emma
-else
-ifdef LOCAL_SDK_VERSION
-ifdef TARGET_BUILD_APPS
-# In unbundled build merge the emma library into the apk.
-LOCAL_STATIC_JAVA_LIBRARIES += emma
-else
-# If build against the SDK in full build, core.jar is not used,
-# we have to use prebiult emma.jar to make Proguard happy;
-# Otherwise emma classes are included in core.jar.
-LOCAL_PROGUARD_FLAGS += -libraryjars $(EMMA_JAR)
-endif # full build
-endif # LOCAL_SDK_VERSION
-endif # EMMA_INSTRUMENT_STATIC
-endif # LOCAL_EMMA_INSTRUMENT
-
-rs_compatibility_jni_libs :=
-
-#################################
-include $(BUILD_SYSTEM)/java.mk
-#################################
-
-LOCAL_SDK_RES_VERSION:=$(strip $(LOCAL_SDK_RES_VERSION))
-ifeq ($(LOCAL_SDK_RES_VERSION),)
-  LOCAL_SDK_RES_VERSION:=$(LOCAL_SDK_VERSION)
-endif
-
-full_android_manifest := $(LOCAL_FULL_MANIFEST_FILE)
-$(LOCAL_INTERMEDIATE_TARGETS): \
-    PRIVATE_ANDROID_MANIFEST := $(full_android_manifest)
-ifneq (,$(filter-out current, $(LOCAL_SDK_VERSION)))
-$(LOCAL_INTERMEDIATE_TARGETS): \
-    PRIVATE_DEFAULT_APP_TARGET_SDK := $(LOCAL_SDK_VERSION)
-else
-$(LOCAL_INTERMEDIATE_TARGETS): \
-    PRIVATE_DEFAULT_APP_TARGET_SDK := $(DEFAULT_APP_TARGET_SDK)
-endif
-
-ifneq ($(all_resources),)
-
-# Since we don't know where the real R.java file is going to end up,
-# we need to use another file to stand in its place.  We'll just
-# copy the generated file to src/R.stamp, which means it will
-# have the same contents and timestamp as the actual file.
-#
-# At the same time, this will copy the R.java file to a central
-# 'R' directory to make it easier to add the files to an IDE.
-#
-#TODO: use PRIVATE_SOURCE_INTERMEDIATES_DIR instead of
-#      $(intermediates.COMMON)/src
-ifneq ($(package_expected_intermediates_COMMON),$(intermediates.COMMON))
-  $(error $(LOCAL_MODULE): internal error: expected intermediates.COMMON "$(package_expected_intermediates_COMMON)" != intermediates.COMMON "$(intermediates.COMMON)")
-endif
-
-$(R_file_stamp): PRIVATE_RESOURCE_PUBLICS_OUTPUT := \
-			$(intermediates.COMMON)/public_resources.xml
-$(R_file_stamp): PRIVATE_PROGUARD_OPTIONS_FILE := $(proguard_options_file)
-$(R_file_stamp): $(all_res_assets) $(full_android_manifest) $(RenderScript_file_stamp) $(AAPT) | $(ACP)
-	@echo "target R.java/Manifest.java: $(PRIVATE_MODULE) ($@)"
-	@rm -f $@
-	$(create-resource-java-files)
-	$(hide) for GENERATED_MANIFEST_FILE in `find $(PRIVATE_SOURCE_INTERMEDIATES_DIR) \
-					-name Manifest.java 2> /dev/null`; do \
-		dir=`awk '/package/{gsub(/\./,"/",$$2);gsub(/;/,"",$$2);print $$2;exit}' $$GENERATED_MANIFEST_FILE`; \
-		mkdir -p $(TARGET_COMMON_OUT_ROOT)/R/$$dir; \
-		$(ACP) -fp $$GENERATED_MANIFEST_FILE $(TARGET_COMMON_OUT_ROOT)/R/$$dir; \
-	done;
-	$(hide) for GENERATED_R_FILE in `find $(PRIVATE_SOURCE_INTERMEDIATES_DIR) \
-					-name R.java 2> /dev/null`; do \
-		dir=`awk '/package/{gsub(/\./,"/",$$2);gsub(/;/,"",$$2);print $$2;exit}' $$GENERATED_R_FILE`; \
-		mkdir -p $(TARGET_COMMON_OUT_ROOT)/R/$$dir; \
-		$(ACP) -fp $$GENERATED_R_FILE $(TARGET_COMMON_OUT_ROOT)/R/$$dir \
-			|| exit 31; \
-		$(ACP) -fp $$GENERATED_R_FILE $@ || exit 32; \
-	done; \
-
-$(proguard_options_file): $(R_file_stamp)
-
-ifdef LOCAL_EXPORT_PACKAGE_RESOURCES
-# Put this module's resources into a PRODUCT-agnositc package that
-# other packages can use to build their own PRODUCT-agnostic R.java (etc.)
-# files.
-resource_export_package := $(intermediates.COMMON)/package-export.apk
-$(R_file_stamp): $(resource_export_package)
-
-# add-assets-to-package looks at PRODUCT_AAPT_CONFIG, but this target
-# can't know anything about PRODUCT.  Clear it out just for this target.
-$(resource_export_package): PRIVATE_PRODUCT_AAPT_CONFIG :=
-$(resource_export_package): PRIVATE_PRODUCT_AAPT_PREF_CONFIG :=
-$(resource_export_package): $(all_res_assets) $(full_android_manifest) $(RenderScript_file_stamp) $(AAPT)
-	@echo "target Export Resources: $(PRIVATE_MODULE) ($@)"
-	$(create-empty-package)
-	$(add-assets-to-package)
-endif
-
-# Other modules should depend on the BUILT module if
-# they want to use this module's R.java file.
-$(LOCAL_BUILT_MODULE): $(R_file_stamp)
-
-ifneq ($(full_classes_jar),)
-# If full_classes_jar is non-empty, we're building sources.
-# If we're building sources, the initial javac step (which
-# produces full_classes_compiled_jar) needs to ensure the
-# R.java and Manifest.java files have been generated first.
-$(full_classes_compiled_jar): $(R_file_stamp)
-endif
-
-endif  # all_resources
-
-ifeq ($(LOCAL_NO_STANDARD_LIBRARIES),true)
-# We need to explicitly clear this var so that we don't
-# inherit the value from whomever caused us to be built.
-$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_AAPT_INCLUDES :=
-else
-# Most packages should link against the resources defined by framework-res.
-# Even if they don't have their own resources, they may use framework
-# resources.
-ifneq ($(filter-out current,$(LOCAL_SDK_RES_VERSION))$(if $(TARGET_BUILD_APPS),$(filter current,$(LOCAL_SDK_RES_VERSION))),)
-# for released sdk versions, the platform resources were built into android.jar.
-framework_res_package_export := \
-    $(HISTORICAL_SDK_VERSIONS_ROOT)/$(LOCAL_SDK_RES_VERSION)/android.jar
-framework_res_package_export_deps := $(framework_res_package_export)
-else # LOCAL_SDK_RES_VERSION
-framework_res_package_export := \
-    $(call intermediates-dir-for,APPS,framework-res,,COMMON)/package-export.apk
-# We can't depend directly on the export.apk file; it won't get its
-# PRIVATE_ vars set up correctly if we do.  Instead, depend on the
-# corresponding R.stamp file, which lists the export.apk as a dependency.
-framework_res_package_export_deps := \
-    $(dir $(framework_res_package_export))src/R.stamp
-endif # LOCAL_SDK_RES_VERSION
-$(R_file_stamp): $(framework_res_package_export_deps)
-$(LOCAL_INTERMEDIATE_TARGETS): \
-    PRIVATE_AAPT_INCLUDES := $(framework_res_package_export)
-endif # LOCAL_NO_STANDARD_LIBRARIES
-
-ifneq ($(full_classes_jar),)
-$(LOCAL_BUILT_MODULE): PRIVATE_DEX_FILE := $(built_dex)
-$(LOCAL_BUILT_MODULE): $(built_dex)
-endif # full_classes_jar
-
-
-# Get the list of jni libraries to be included in the apk file.
-
-so_suffix := $($(my_prefix)SHLIB_SUFFIX)
-
-jni_shared_libraries := \
-    $(addprefix $($(LOCAL_2ND_ARCH_VAR_PREFIX)$(my_prefix)OUT_INTERMEDIATE_LIBRARIES)/, \
-      $(addsuffix $(so_suffix), \
-        $(LOCAL_JNI_SHARED_LIBRARIES)))
-
-# Include RS dynamically-generated libraries as well
-# Keep this ifneq, as the += otherwise adds spaces that need to be stripped.
-ifneq ($(rs_compatibility_jni_libs),)
-jni_shared_libraries += $(rs_compatibility_jni_libs)
-endif
-
-# App explicitly requires the prebuilt NDK libstlport_shared.so.
-# libstlport_shared.so should never go to the system image.
-# Instead it should be packaged into the apk.
-ifeq (stlport_shared,$(LOCAL_NDK_STL_VARIANT))
-ifndef LOCAL_SDK_VERSION
-$(error LOCAL_SDK_VERSION has to be defined together with LOCAL_NDK_STL_VARIANT, \
-    LOCAL_PACKAGE_NAME=$(LOCAL_PACKAGE_NAME))
-endif
-jni_shared_libraries += \
-    $(HISTORICAL_NDK_VERSIONS_ROOT)/current/sources/cxx-stl/stlport/libs/$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)CPU_ABI)/libstlport_shared.so
-endif
-
-# Set the abi directory used by the local JNI shared libraries.
-# (Doesn't change how the local shared libraries are compiled, just
-# sets where they are stored in the apk.)
-
-ifeq ($(LOCAL_JNI_SHARED_LIBRARIES_ABI),)
-    jni_shared_libraries_abi := $(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)CPU_ABI)
-else
-    jni_shared_libraries_abi := $(LOCAL_JNI_SHARED_LIBRARIES_ABI)
-endif
-
-# Pick a key to sign the package with.  If this package hasn't specified
-# an explicit certificate, use the default.
-# Secure release builds will have their packages signed after the fact,
-# so it's ok for these private keys to be in the clear.
-ifeq ($(LOCAL_CERTIFICATE),)
-    LOCAL_CERTIFICATE := $(DEFAULT_SYSTEM_DEV_CERTIFICATE)
-endif
-
-ifeq ($(LOCAL_CERTIFICATE),EXTERNAL)
-  # The special value "EXTERNAL" means that we will sign it with the
-  # default devkey, apply predexopt, but then expect the final .apk
-  # (after dexopting) to be signed by an outside tool.
-  LOCAL_CERTIFICATE := $(DEFAULT_SYSTEM_DEV_CERTIFICATE)
-  PACKAGES.$(LOCAL_PACKAGE_NAME).EXTERNAL_KEY := 1
-endif
-
-# If this is not an absolute certificate, assign it to a generic one.
-ifeq ($(dir $(strip $(LOCAL_CERTIFICATE))),./)
-    LOCAL_CERTIFICATE := $(dir $(DEFAULT_SYSTEM_DEV_CERTIFICATE))$(LOCAL_CERTIFICATE)
-endif
-private_key := $(LOCAL_CERTIFICATE).pk8
-certificate := $(LOCAL_CERTIFICATE).x509.pem
-
-$(LOCAL_BUILT_MODULE): $(private_key) $(certificate) $(SIGNAPK_JAR)
-$(LOCAL_BUILT_MODULE): PRIVATE_PRIVATE_KEY := $(private_key)
-$(LOCAL_BUILT_MODULE): PRIVATE_CERTIFICATE := $(certificate)
-
-PACKAGES.$(LOCAL_PACKAGE_NAME).PRIVATE_KEY := $(private_key)
-PACKAGES.$(LOCAL_PACKAGE_NAME).CERTIFICATE := $(certificate)
-
-$(LOCAL_BUILT_MODULE): PRIVATE_ADDITIONAL_CERTIFICATES := $(foreach c,\
-    $(LOCAL_ADDITIONAL_CERTIFICATES), $(c).x509.pem $(c).pk8)
-
-# Define the rule to build the actual package.
-$(LOCAL_BUILT_MODULE): $(AAPT) | $(ZIPALIGN)
-ifdef LOCAL_DEX_PREOPT
-$(LOCAL_BUILT_MODULE): PRIVATE_DEX_LOCATION := $(patsubst $(PRODUCT_OUT)%,%,$(LOCAL_INSTALLED_MODULE))
-$(LOCAL_BUILT_MODULE): PRIVATE_BUILT_ODEX := $(built_odex)
-$(LOCAL_BUILT_MODULE): PRIVATE_DEX_PREOPT_IMAGE := $(LOCAL_DEX_PREOPT_IMAGE)
-# Make sure the boot jars get dexpreopt-ed first
-$(LOCAL_BUILT_MODULE) : $(DEXPREOPT_ONE_FILE_DEPENDENCY_BUILT_BOOT_PREOPT)
-$(LOCAL_BUILT_MODULE) : $(DEXPREOPT_ONE_FILE_DEPENDENCY_TOOLS)
-$(LOCAL_BUILT_MODULE) : $(LOCAL_DEX_PREOPT_IMAGE)
-
-# built_odex is byproduct of LOCAL_BUILT_MODULE without its own build recipe.
-$(built_odex) : $(LOCAL_BUILT_MODULE)
-endif
-$(LOCAL_BUILT_MODULE): PRIVATE_JNI_SHARED_LIBRARIES := $(jni_shared_libraries)
-$(LOCAL_BUILT_MODULE): PRIVATE_JNI_SHARED_LIBRARIES_ABI := $(jni_shared_libraries_abi)
-ifneq ($(TARGET_BUILD_APPS),)
-    # Include all resources for unbundled apps.
-    LOCAL_AAPT_INCLUDE_ALL_RESOURCES := true
-endif
-ifeq ($(LOCAL_AAPT_INCLUDE_ALL_RESOURCES),true)
-    $(LOCAL_BUILT_MODULE): PRIVATE_PRODUCT_AAPT_CONFIG :=
-    $(LOCAL_BUILT_MODULE): PRIVATE_PRODUCT_AAPT_PREF_CONFIG :=
-else
-    $(LOCAL_BUILT_MODULE): PRIVATE_PRODUCT_AAPT_CONFIG := $(PRODUCT_AAPT_CONFIG)
-    $(LOCAL_BUILT_MODULE): PRIVATE_PRODUCT_AAPT_PREF_CONFIG := $(PRODUCT_AAPT_PREF_CONFIG)
-endif
-$(LOCAL_BUILT_MODULE): $(all_res_assets) $(jni_shared_libraries) $(full_android_manifest)
-	@echo "target Package: $(PRIVATE_MODULE) ($@)"
-	$(create-empty-package)
-	$(add-assets-to-package)
-ifneq ($(jni_shared_libraries),)
-	$(add-jni-shared-libs-to-package)
-endif
-ifneq ($(full_classes_jar),)
-	$(add-dex-to-package)
-endif
-	$(add-carried-java-resources)
-ifneq ($(extra_jar_args),)
-	$(add-java-resources-to-package)
-endif
-	$(sign-package)
-ifdef LOCAL_DEX_PREOPT
-	$(call dexpreopt-one-file,$(PRIVATE_DEX_PREOPT_IMAGE),$@,$(PRIVATE_DEX_LOCATION),$(PRIVATE_BUILT_ODEX))
-ifneq (nostripping,$(LOCAL_DEX_PREOPT))
-	$(call dexpreopt-remove-classes.dex,$@)
-endif
-endif
-	@# Alignment must happen after all other zip operations.
-	$(align-package)
-
-# Save information about this package
-PACKAGES.$(LOCAL_PACKAGE_NAME).OVERRIDES := $(strip $(LOCAL_OVERRIDES_PACKAGES))
-PACKAGES.$(LOCAL_PACKAGE_NAME).RESOURCE_FILES := $(all_resources)
-ifdef package_resource_overlays
-PACKAGES.$(LOCAL_PACKAGE_NAME).RESOURCE_OVERLAYS := $(package_resource_overlays)
-endif
-
-PACKAGES := $(PACKAGES) $(LOCAL_PACKAGE_NAME)
-
-# Dist the files that can be bundled in system.img.
-# They include the jni shared libraries and the apk with jni libraries stripped.
-ifeq ($(LOCAL_DIST_BUNDLED_BINARIES),true)
-ifneq ($(filter $(LOCAL_PACKAGE_NAME),$(TARGET_BUILD_APPS)),)
-ifneq ($(strip $(jni_shared_libraries)),)
-dist_subdir := bundled_$(LOCAL_PACKAGE_NAME)
-$(foreach f, $(jni_shared_libraries), \
-  $(call dist-for-goals, apps_only, $(f):$(dist_subdir)/$(notdir $(f))))
-
-apk_jni_stripped := $(intermediates)/jni_stripped/package.apk
-$(apk_jni_stripped): PRIVATE_JNI_SHARED_LIBRARIES := $(notdir $(jni_shared_libraries))
-$(apk_jni_stripped) : $(LOCAL_BUILT_MODULE) | $(ZIPALIGN)
-	@rm -rf $(dir $@) && mkdir -p $(dir $@)
-	$(hide) cp $< $@
-	$(hide) zip -d $@ $(foreach f,$(PRIVATE_JNI_SHARED_LIBRARIES),\*/$(f))
-	$(call align-package)
-
-$(call dist-for-goals, apps_only, $(apk_jni_stripped):$(dist_subdir)/$(LOCAL_PACKAGE_NAME).apk)
-
-endif  # jni_shared_libraries
-endif  # apps_only build
-endif  # LOCAL_DIST_BUNDLED_BINARIES
-
-# Lint phony targets
-.PHONY: lint-$(LOCAL_PACKAGE_NAME)
-lint-$(LOCAL_PACKAGE_NAME): PRIVATE_PATH := $(LOCAL_PATH)
-lint-$(LOCAL_PACKAGE_NAME): PRIVATE_LINT_FLAGS := $(LOCAL_LINT_FLAGS)
-lint-$(LOCAL_PACKAGE_NAME) :
-	@echo lint $(PRIVATE_PATH)
-	$(LINT) $(PRIVATE_LINT_FLAGS) $(PRIVATE_PATH)
-
-lintall : lint-$(LOCAL_PACKAGE_NAME)
-
-endif # skip_definition
-
-# Reset internal variables.
-all_res_assets :=
-
-LOCAL_NO_2ND_ARCH_MODULE_SUFFIX :=
+endif # TARGET_2ND_ARCH
 
 LOCAL_2ND_ARCH_VAR_PREFIX :=
+LOCAL_NO_2ND_ARCH_MODULE_SUFFIX :=
+
+my_module_arch_supported :=
diff --git a/core/package_internal.mk b/core/package_internal.mk
new file mode 100644
index 0000000..65c35cc
--- /dev/null
+++ b/core/package_internal.mk
@@ -0,0 +1,469 @@
+#
+# Copyright (C) 2008 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+###########################################################
+## Standard rules for building an application package.
+##
+## Additional inputs from base_rules.make:
+## LOCAL_PACKAGE_NAME: The name of the package; the directory
+## will be called this.
+##
+## MODULE, MODULE_PATH, and MODULE_SUFFIX will
+## be set for you.
+###########################################################
+
+# If this makefile is being read from within an inheritance,
+# use the new values.
+skip_definition:=
+ifdef LOCAL_PACKAGE_OVERRIDES
+  package_overridden := $(call set-inherited-package-variables)
+  ifeq ($(strip $(package_overridden)),)
+    skip_definition := true
+  endif
+endif
+
+ifndef skip_definition
+
+LOCAL_PACKAGE_NAME := $(strip $(LOCAL_PACKAGE_NAME))
+ifeq ($(LOCAL_PACKAGE_NAME),)
+$(error $(LOCAL_PATH): Package modules must define LOCAL_PACKAGE_NAME)
+endif
+
+ifneq ($(strip $(LOCAL_MODULE_SUFFIX)),)
+$(error $(LOCAL_PATH): Package modules may not define LOCAL_MODULE_SUFFIX)
+endif
+LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX)
+
+ifneq ($(strip $(LOCAL_MODULE)),)
+$(error $(LOCAL_PATH): Package modules may not define LOCAL_MODULE)
+endif
+LOCAL_MODULE := $(LOCAL_PACKAGE_NAME)
+
+ifeq ($(strip $(LOCAL_MANIFEST_FILE)),)
+LOCAL_MANIFEST_FILE := AndroidManifest.xml
+endif
+
+# If you need to put the MANIFEST_FILE outside of LOCAL_PATH
+# you can use FULL_MANIFEST_FILE
+ifeq ($(strip $(LOCAL_FULL_MANIFEST_FILE)),)
+LOCAL_FULL_MANIFEST_FILE := $(LOCAL_PATH)/$(LOCAL_MANIFEST_FILE)
+endif
+
+ifneq ($(strip $(LOCAL_MODULE_CLASS)),)
+$(error $(LOCAL_PATH): Package modules may not set LOCAL_MODULE_CLASS)
+endif
+LOCAL_MODULE_CLASS := APPS
+
+# Package LOCAL_MODULE_TAGS default to optional
+LOCAL_MODULE_TAGS := $(strip $(LOCAL_MODULE_TAGS))
+ifeq ($(LOCAL_MODULE_TAGS),)
+LOCAL_MODULE_TAGS := optional
+endif
+
+ifeq ($(filter tests, $(LOCAL_MODULE_TAGS)),)
+# Force localization check if it's not tagged as tests.
+LOCAL_AAPT_FLAGS := $(LOCAL_AAPT_FLAGS) -z
+endif
+
+ifeq (,$(LOCAL_ASSET_DIR))
+LOCAL_ASSET_DIR := $(LOCAL_PATH)/assets
+endif
+
+ifeq (,$(LOCAL_RESOURCE_DIR))
+  LOCAL_RESOURCE_DIR := $(LOCAL_PATH)/res
+endif
+
+package_resource_overlays := $(strip \
+    $(wildcard $(foreach dir, $(PRODUCT_PACKAGE_OVERLAYS), \
+      $(addprefix $(dir)/, $(LOCAL_RESOURCE_DIR)))) \
+    $(wildcard $(foreach dir, $(DEVICE_PACKAGE_OVERLAYS), \
+      $(addprefix $(dir)/, $(LOCAL_RESOURCE_DIR)))))
+
+LOCAL_RESOURCE_DIR := $(package_resource_overlays) $(LOCAL_RESOURCE_DIR)
+
+all_assets := $(call find-subdir-assets,$(LOCAL_ASSET_DIR))
+all_assets := $(addprefix $(LOCAL_ASSET_DIR)/,$(patsubst assets/%,%,$(all_assets)))
+
+all_resources := $(strip \
+    $(foreach dir, $(LOCAL_RESOURCE_DIR), \
+      $(addprefix $(dir)/, \
+        $(patsubst res/%,%, \
+          $(call find-subdir-assets,$(dir)) \
+         ) \
+       ) \
+     ))
+
+all_res_assets := $(strip $(all_assets) $(all_resources))
+
+package_expected_intermediates_COMMON := $(call local-intermediates-dir,COMMON)
+# If no assets or resources were found, clear the directory variables so
+# we don't try to build them.
+ifeq (,$(all_assets))
+LOCAL_ASSET_DIR:=
+endif
+ifeq (,$(all_resources))
+LOCAL_RESOURCE_DIR:=
+R_file_stamp :=
+else
+# Make sure that R_file_stamp inherits the proper PRIVATE vars.
+# If R.stamp moves, be sure to update the framework makefile,
+# which has intimate knowledge of its location.
+R_file_stamp := $(package_expected_intermediates_COMMON)/src/R.stamp
+LOCAL_INTERMEDIATE_TARGETS += $(R_file_stamp)
+endif
+
+LOCAL_BUILT_MODULE_STEM := package.apk
+
+LOCAL_PROGUARD_ENABLED:=$(strip $(LOCAL_PROGUARD_ENABLED))
+ifndef LOCAL_PROGUARD_ENABLED
+ifneq ($(DISABLE_PROGUARD),true)
+    LOCAL_PROGUARD_ENABLED :=full
+endif
+endif
+ifeq ($(LOCAL_PROGUARD_ENABLED),disabled)
+    # the package explicitly request to disable proguard.
+    LOCAL_PROGUARD_ENABLED :=
+endif
+proguard_options_file :=
+ifneq ($(LOCAL_PROGUARD_ENABLED),custom)
+ifneq ($(all_resources),)
+    proguard_options_file := $(package_expected_intermediates_COMMON)/proguard_options
+endif # all_resources
+endif # !custom
+LOCAL_PROGUARD_FLAGS := $(addprefix -include ,$(proguard_options_file)) $(LOCAL_PROGUARD_FLAGS)
+
+ifeq (true,$(EMMA_INSTRUMENT))
+ifndef LOCAL_EMMA_INSTRUMENT
+# No emma for test apks.
+ifeq (,$(filer tests,$(LOCAL_MODULE_TAGS))$(LOCAL_INSTRUMENTATION_FOR))
+LOCAL_EMMA_INSTRUMENT := true
+endif # No test apk
+endif # LOCAL_EMMA_INSTRUMENT is not set
+else
+LOCAL_EMMA_INSTRUMENT := false
+endif # EMMA_INSTRUMENT is true
+
+ifeq (true,$(LOCAL_EMMA_INSTRUMENT))
+ifeq (true,$(EMMA_INSTRUMENT_STATIC))
+LOCAL_STATIC_JAVA_LIBRARIES += emma
+else
+ifdef LOCAL_SDK_VERSION
+ifdef TARGET_BUILD_APPS
+# In unbundled build merge the emma library into the apk.
+LOCAL_STATIC_JAVA_LIBRARIES += emma
+else
+# If build against the SDK in full build, core.jar is not used,
+# we have to use prebiult emma.jar to make Proguard happy;
+# Otherwise emma classes are included in core.jar.
+LOCAL_PROGUARD_FLAGS += -libraryjars $(EMMA_JAR)
+endif # full build
+endif # LOCAL_SDK_VERSION
+endif # EMMA_INSTRUMENT_STATIC
+endif # LOCAL_EMMA_INSTRUMENT
+
+rs_compatibility_jni_libs :=
+
+#################################
+include $(BUILD_SYSTEM)/java.mk
+#################################
+
+LOCAL_SDK_RES_VERSION:=$(strip $(LOCAL_SDK_RES_VERSION))
+ifeq ($(LOCAL_SDK_RES_VERSION),)
+  LOCAL_SDK_RES_VERSION:=$(LOCAL_SDK_VERSION)
+endif
+
+full_android_manifest := $(LOCAL_FULL_MANIFEST_FILE)
+$(LOCAL_INTERMEDIATE_TARGETS): \
+    PRIVATE_ANDROID_MANIFEST := $(full_android_manifest)
+ifneq (,$(filter-out current, $(LOCAL_SDK_VERSION)))
+$(LOCAL_INTERMEDIATE_TARGETS): \
+    PRIVATE_DEFAULT_APP_TARGET_SDK := $(LOCAL_SDK_VERSION)
+else
+$(LOCAL_INTERMEDIATE_TARGETS): \
+    PRIVATE_DEFAULT_APP_TARGET_SDK := $(DEFAULT_APP_TARGET_SDK)
+endif
+
+ifneq ($(all_resources),)
+
+# Since we don't know where the real R.java file is going to end up,
+# we need to use another file to stand in its place.  We'll just
+# copy the generated file to src/R.stamp, which means it will
+# have the same contents and timestamp as the actual file.
+#
+# At the same time, this will copy the R.java file to a central
+# 'R' directory to make it easier to add the files to an IDE.
+#
+#TODO: use PRIVATE_SOURCE_INTERMEDIATES_DIR instead of
+#      $(intermediates.COMMON)/src
+ifneq ($(package_expected_intermediates_COMMON),$(intermediates.COMMON))
+  $(error $(LOCAL_MODULE): internal error: expected intermediates.COMMON "$(package_expected_intermediates_COMMON)" != intermediates.COMMON "$(intermediates.COMMON)")
+endif
+
+$(R_file_stamp): PRIVATE_RESOURCE_PUBLICS_OUTPUT := \
+			$(intermediates.COMMON)/public_resources.xml
+$(R_file_stamp): PRIVATE_PROGUARD_OPTIONS_FILE := $(proguard_options_file)
+$(R_file_stamp): $(all_res_assets) $(full_android_manifest) $(RenderScript_file_stamp) $(AAPT) | $(ACP)
+	@echo "target R.java/Manifest.java: $(PRIVATE_MODULE) ($@)"
+	@rm -f $@
+	$(create-resource-java-files)
+	$(hide) for GENERATED_MANIFEST_FILE in `find $(PRIVATE_SOURCE_INTERMEDIATES_DIR) \
+					-name Manifest.java 2> /dev/null`; do \
+		dir=`awk '/package/{gsub(/\./,"/",$$2);gsub(/;/,"",$$2);print $$2;exit}' $$GENERATED_MANIFEST_FILE`; \
+		mkdir -p $(TARGET_COMMON_OUT_ROOT)/R/$$dir; \
+		$(ACP) -fp $$GENERATED_MANIFEST_FILE $(TARGET_COMMON_OUT_ROOT)/R/$$dir; \
+	done;
+	$(hide) for GENERATED_R_FILE in `find $(PRIVATE_SOURCE_INTERMEDIATES_DIR) \
+					-name R.java 2> /dev/null`; do \
+		dir=`awk '/package/{gsub(/\./,"/",$$2);gsub(/;/,"",$$2);print $$2;exit}' $$GENERATED_R_FILE`; \
+		mkdir -p $(TARGET_COMMON_OUT_ROOT)/R/$$dir; \
+		$(ACP) -fp $$GENERATED_R_FILE $(TARGET_COMMON_OUT_ROOT)/R/$$dir \
+			|| exit 31; \
+		$(ACP) -fp $$GENERATED_R_FILE $@ || exit 32; \
+	done; \
+
+$(proguard_options_file): $(R_file_stamp)
+
+ifdef LOCAL_EXPORT_PACKAGE_RESOURCES
+# Put this module's resources into a PRODUCT-agnositc package that
+# other packages can use to build their own PRODUCT-agnostic R.java (etc.)
+# files.
+resource_export_package := $(intermediates.COMMON)/package-export.apk
+$(R_file_stamp): $(resource_export_package)
+
+# add-assets-to-package looks at PRODUCT_AAPT_CONFIG, but this target
+# can't know anything about PRODUCT.  Clear it out just for this target.
+$(resource_export_package): PRIVATE_PRODUCT_AAPT_CONFIG :=
+$(resource_export_package): PRIVATE_PRODUCT_AAPT_PREF_CONFIG :=
+$(resource_export_package): $(all_res_assets) $(full_android_manifest) $(RenderScript_file_stamp) $(AAPT)
+	@echo "target Export Resources: $(PRIVATE_MODULE) ($@)"
+	$(create-empty-package)
+	$(add-assets-to-package)
+endif
+
+# Other modules should depend on the BUILT module if
+# they want to use this module's R.java file.
+$(LOCAL_BUILT_MODULE): $(R_file_stamp)
+
+ifneq ($(full_classes_jar),)
+# If full_classes_jar is non-empty, we're building sources.
+# If we're building sources, the initial javac step (which
+# produces full_classes_compiled_jar) needs to ensure the
+# R.java and Manifest.java files have been generated first.
+$(full_classes_compiled_jar): $(R_file_stamp)
+endif
+
+endif  # all_resources
+
+ifeq ($(LOCAL_NO_STANDARD_LIBRARIES),true)
+# We need to explicitly clear this var so that we don't
+# inherit the value from whomever caused us to be built.
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_AAPT_INCLUDES :=
+else
+# Most packages should link against the resources defined by framework-res.
+# Even if they don't have their own resources, they may use framework
+# resources.
+ifneq ($(filter-out current,$(LOCAL_SDK_RES_VERSION))$(if $(TARGET_BUILD_APPS),$(filter current,$(LOCAL_SDK_RES_VERSION))),)
+# for released sdk versions, the platform resources were built into android.jar.
+framework_res_package_export := \
+    $(HISTORICAL_SDK_VERSIONS_ROOT)/$(LOCAL_SDK_RES_VERSION)/android.jar
+framework_res_package_export_deps := $(framework_res_package_export)
+else # LOCAL_SDK_RES_VERSION
+framework_res_package_export := \
+    $(call intermediates-dir-for,APPS,framework-res,,COMMON)/package-export.apk
+# We can't depend directly on the export.apk file; it won't get its
+# PRIVATE_ vars set up correctly if we do.  Instead, depend on the
+# corresponding R.stamp file, which lists the export.apk as a dependency.
+framework_res_package_export_deps := \
+    $(dir $(framework_res_package_export))src/R.stamp
+endif # LOCAL_SDK_RES_VERSION
+$(R_file_stamp): $(framework_res_package_export_deps)
+$(LOCAL_INTERMEDIATE_TARGETS): \
+    PRIVATE_AAPT_INCLUDES := $(framework_res_package_export)
+endif # LOCAL_NO_STANDARD_LIBRARIES
+
+ifneq ($(full_classes_jar),)
+$(LOCAL_BUILT_MODULE): PRIVATE_DEX_FILE := $(built_dex)
+$(LOCAL_BUILT_MODULE): $(built_dex)
+endif # full_classes_jar
+
+
+# Get the list of jni libraries to be included in the apk file.
+
+so_suffix := $($(my_prefix)SHLIB_SUFFIX)
+
+jni_shared_libraries := \
+    $(addprefix $($(LOCAL_2ND_ARCH_VAR_PREFIX)$(my_prefix)OUT_INTERMEDIATE_LIBRARIES)/, \
+      $(addsuffix $(so_suffix), \
+        $(LOCAL_JNI_SHARED_LIBRARIES)))
+
+# Include RS dynamically-generated libraries as well
+# Keep this ifneq, as the += otherwise adds spaces that need to be stripped.
+ifneq ($(rs_compatibility_jni_libs),)
+jni_shared_libraries += $(rs_compatibility_jni_libs)
+endif
+
+# App explicitly requires the prebuilt NDK libstlport_shared.so.
+# libstlport_shared.so should never go to the system image.
+# Instead it should be packaged into the apk.
+ifeq (stlport_shared,$(LOCAL_NDK_STL_VARIANT))
+ifndef LOCAL_SDK_VERSION
+$(error LOCAL_SDK_VERSION has to be defined together with LOCAL_NDK_STL_VARIANT, \
+    LOCAL_PACKAGE_NAME=$(LOCAL_PACKAGE_NAME))
+endif
+jni_shared_libraries += \
+    $(HISTORICAL_NDK_VERSIONS_ROOT)/current/sources/cxx-stl/stlport/libs/$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)CPU_ABI)/libstlport_shared.so
+endif
+
+# Set the abi directory used by the local JNI shared libraries.
+# (Doesn't change how the local shared libraries are compiled, just
+# sets where they are stored in the apk.)
+
+ifeq ($(LOCAL_JNI_SHARED_LIBRARIES_ABI),)
+    jni_shared_libraries_abi := $(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)CPU_ABI)
+else
+    jni_shared_libraries_abi := $(LOCAL_JNI_SHARED_LIBRARIES_ABI)
+endif
+
+# Pick a key to sign the package with.  If this package hasn't specified
+# an explicit certificate, use the default.
+# Secure release builds will have their packages signed after the fact,
+# so it's ok for these private keys to be in the clear.
+ifeq ($(LOCAL_CERTIFICATE),)
+    LOCAL_CERTIFICATE := $(DEFAULT_SYSTEM_DEV_CERTIFICATE)
+endif
+
+ifeq ($(LOCAL_CERTIFICATE),EXTERNAL)
+  # The special value "EXTERNAL" means that we will sign it with the
+  # default devkey, apply predexopt, but then expect the final .apk
+  # (after dexopting) to be signed by an outside tool.
+  LOCAL_CERTIFICATE := $(DEFAULT_SYSTEM_DEV_CERTIFICATE)
+  PACKAGES.$(LOCAL_PACKAGE_NAME).EXTERNAL_KEY := 1
+endif
+
+# If this is not an absolute certificate, assign it to a generic one.
+ifeq ($(dir $(strip $(LOCAL_CERTIFICATE))),./)
+    LOCAL_CERTIFICATE := $(dir $(DEFAULT_SYSTEM_DEV_CERTIFICATE))$(LOCAL_CERTIFICATE)
+endif
+private_key := $(LOCAL_CERTIFICATE).pk8
+certificate := $(LOCAL_CERTIFICATE).x509.pem
+
+$(LOCAL_BUILT_MODULE): $(private_key) $(certificate) $(SIGNAPK_JAR)
+$(LOCAL_BUILT_MODULE): PRIVATE_PRIVATE_KEY := $(private_key)
+$(LOCAL_BUILT_MODULE): PRIVATE_CERTIFICATE := $(certificate)
+
+PACKAGES.$(LOCAL_PACKAGE_NAME).PRIVATE_KEY := $(private_key)
+PACKAGES.$(LOCAL_PACKAGE_NAME).CERTIFICATE := $(certificate)
+
+$(LOCAL_BUILT_MODULE): PRIVATE_ADDITIONAL_CERTIFICATES := $(foreach c,\
+    $(LOCAL_ADDITIONAL_CERTIFICATES), $(c).x509.pem $(c).pk8)
+
+# Define the rule to build the actual package.
+$(LOCAL_BUILT_MODULE): $(AAPT) | $(ZIPALIGN)
+ifdef LOCAL_DEX_PREOPT
+$(LOCAL_BUILT_MODULE): PRIVATE_DEX_LOCATION := $(patsubst $(PRODUCT_OUT)%,%,$(LOCAL_INSTALLED_MODULE))
+$(LOCAL_BUILT_MODULE): PRIVATE_BUILT_ODEX := $(built_odex)
+$(LOCAL_BUILT_MODULE): PRIVATE_DEX_PREOPT_IMAGE := $(LOCAL_DEX_PREOPT_IMAGE)
+# Make sure the boot jars get dexpreopt-ed first
+$(LOCAL_BUILT_MODULE) : $(DEXPREOPT_ONE_FILE_DEPENDENCY_BUILT_BOOT_PREOPT)
+$(LOCAL_BUILT_MODULE) : $(DEXPREOPT_ONE_FILE_DEPENDENCY_TOOLS)
+$(LOCAL_BUILT_MODULE) : $(LOCAL_DEX_PREOPT_IMAGE)
+
+# built_odex is byproduct of LOCAL_BUILT_MODULE without its own build recipe.
+$(built_odex) : $(LOCAL_BUILT_MODULE)
+endif
+$(LOCAL_BUILT_MODULE): PRIVATE_JNI_SHARED_LIBRARIES := $(jni_shared_libraries)
+$(LOCAL_BUILT_MODULE): PRIVATE_JNI_SHARED_LIBRARIES_ABI := $(jni_shared_libraries_abi)
+ifneq ($(TARGET_BUILD_APPS),)
+    # Include all resources for unbundled apps.
+    LOCAL_AAPT_INCLUDE_ALL_RESOURCES := true
+endif
+ifeq ($(LOCAL_AAPT_INCLUDE_ALL_RESOURCES),true)
+    $(LOCAL_BUILT_MODULE): PRIVATE_PRODUCT_AAPT_CONFIG :=
+    $(LOCAL_BUILT_MODULE): PRIVATE_PRODUCT_AAPT_PREF_CONFIG :=
+else
+    $(LOCAL_BUILT_MODULE): PRIVATE_PRODUCT_AAPT_CONFIG := $(PRODUCT_AAPT_CONFIG)
+    $(LOCAL_BUILT_MODULE): PRIVATE_PRODUCT_AAPT_PREF_CONFIG := $(PRODUCT_AAPT_PREF_CONFIG)
+endif
+$(LOCAL_BUILT_MODULE): $(all_res_assets) $(jni_shared_libraries) $(full_android_manifest)
+	@echo "target Package: $(PRIVATE_MODULE) ($@)"
+	$(create-empty-package)
+	$(add-assets-to-package)
+ifneq ($(jni_shared_libraries),)
+	$(add-jni-shared-libs-to-package)
+endif
+ifneq ($(full_classes_jar),)
+	$(add-dex-to-package)
+endif
+	$(add-carried-java-resources)
+ifneq ($(extra_jar_args),)
+	$(add-java-resources-to-package)
+endif
+	$(sign-package)
+ifdef LOCAL_DEX_PREOPT
+	$(call dexpreopt-one-file,$(PRIVATE_DEX_PREOPT_IMAGE),$@,$(PRIVATE_DEX_LOCATION),$(PRIVATE_BUILT_ODEX))
+ifneq (nostripping,$(LOCAL_DEX_PREOPT))
+	$(call dexpreopt-remove-classes.dex,$@)
+endif
+endif
+	@# Alignment must happen after all other zip operations.
+	$(align-package)
+
+# Save information about this package
+PACKAGES.$(LOCAL_PACKAGE_NAME).OVERRIDES := $(strip $(LOCAL_OVERRIDES_PACKAGES))
+PACKAGES.$(LOCAL_PACKAGE_NAME).RESOURCE_FILES := $(all_resources)
+ifdef package_resource_overlays
+PACKAGES.$(LOCAL_PACKAGE_NAME).RESOURCE_OVERLAYS := $(package_resource_overlays)
+endif
+
+PACKAGES := $(PACKAGES) $(LOCAL_PACKAGE_NAME)
+
+# Dist the files that can be bundled in system.img.
+# They include the jni shared libraries and the apk with jni libraries stripped.
+ifeq ($(LOCAL_DIST_BUNDLED_BINARIES),true)
+ifneq ($(filter $(LOCAL_PACKAGE_NAME),$(TARGET_BUILD_APPS)),)
+ifneq ($(strip $(jni_shared_libraries)),)
+dist_subdir := bundled_$(LOCAL_PACKAGE_NAME)
+$(foreach f, $(jni_shared_libraries), \
+  $(call dist-for-goals, apps_only, $(f):$(dist_subdir)/$(notdir $(f))))
+
+apk_jni_stripped := $(intermediates)/jni_stripped/package.apk
+$(apk_jni_stripped): PRIVATE_JNI_SHARED_LIBRARIES := $(notdir $(jni_shared_libraries))
+$(apk_jni_stripped) : $(LOCAL_BUILT_MODULE) | $(ZIPALIGN)
+	@rm -rf $(dir $@) && mkdir -p $(dir $@)
+	$(hide) cp $< $@
+	$(hide) zip -d $@ $(foreach f,$(PRIVATE_JNI_SHARED_LIBRARIES),\*/$(f))
+	$(call align-package)
+
+$(call dist-for-goals, apps_only, $(apk_jni_stripped):$(dist_subdir)/$(LOCAL_PACKAGE_NAME).apk)
+
+endif  # jni_shared_libraries
+endif  # apps_only build
+endif  # LOCAL_DIST_BUNDLED_BINARIES
+
+# Lint phony targets
+.PHONY: lint-$(LOCAL_PACKAGE_NAME)
+lint-$(LOCAL_PACKAGE_NAME): PRIVATE_PATH := $(LOCAL_PATH)
+lint-$(LOCAL_PACKAGE_NAME): PRIVATE_LINT_FLAGS := $(LOCAL_LINT_FLAGS)
+lint-$(LOCAL_PACKAGE_NAME) :
+	@echo lint $(PRIVATE_PATH)
+	$(LINT) $(PRIVATE_LINT_FLAGS) $(PRIVATE_PATH)
+
+lintall : lint-$(LOCAL_PACKAGE_NAME)
+
+endif # skip_definition
+
+# Reset internal variables.
+all_res_assets :=
diff --git a/core/prebuilt.mk b/core/prebuilt.mk
index de0d92c..027c80a 100644
--- a/core/prebuilt.mk
+++ b/core/prebuilt.mk
@@ -6,221 +6,25 @@
 ##
 ###########################################################
 
-ifneq ($(LOCAL_PREBUILT_LIBS),)
-$(error dont use LOCAL_PREBUILT_LIBS anymore LOCAL_PATH=$(LOCAL_PATH))
-endif
-ifneq ($(LOCAL_PREBUILT_EXECUTABLES),)
-$(error dont use LOCAL_PREBUILT_EXECUTABLES anymore LOCAL_PATH=$(LOCAL_PATH))
-endif
-ifneq ($(LOCAL_PREBUILT_JAVA_LIBRARIES),)
-$(error dont use LOCAL_PREBUILT_JAVA_LIBRARIES anymore LOCAL_PATH=$(LOCAL_PATH))
-endif
-
-ifneq ($(TARGET_IS_64_BIT)|$(LOCAL_32_BIT_ONLY),true|true)
-# Build for TARGET_ARCH
-LOCAL_2ND_ARCH_VAR_PREFIX :=
-else
-# Build for TARGET_2ND_ARCH
-LOCAL_2ND_ARCH_VAR_PREFIX := $(TARGET_2ND_ARCH_VAR_PREFIX)
-endif
-
-
-# Not much sense to check build prebuilts
-LOCAL_DONT_CHECK_MODULE := true
-
-ifdef LOCAL_PREBUILT_MODULE_FILE
-my_prebuilt_src_file := $(LOCAL_PREBUILT_MODULE_FILE)
-else
-my_prebuilt_src_file := $(LOCAL_PATH)/$(LOCAL_SRC_FILES)
-endif
-
 ifdef LOCAL_IS_HOST_MODULE
-  my_prefix := HOST_
-else
-  my_prefix := TARGET_
+include $(BUILD_SYSTEM)/prebuilt_internal.mk
+else #!LOCAL_IS_HOST_MODULE
+# check if primary arch is supported
+include $(BUILD_SYSTEM)/module_arch_supported.mk
+ifeq ($(my_module_arch_supported),true)
+# primary arch is supported
+include $(BUILD_SYSTEM)/prebuilt_internal.mk
+else ifneq (,$(TARGET_2ND_ARCH))
+# check if secondary arch is supported
+LOCAL_2ND_ARCH_VAR_PREFIX := $(TARGET_2ND_ARCH_VAR_PREFIX)
+include $(BUILD_SYSTEM)/module_arch_supported.mk
+ifeq ($(my_module_arch_supported),true)
+# secondary arch is supported
+include $(BUILD_SYSTEM)/prebuilt_internal.mk
 endif
-ifeq (SHARED_LIBRARIES,$(LOCAL_MODULE_CLASS))
-  # Put the built targets of all shared libraries in a common directory
-  # to simplify the link line.
-  OVERRIDE_BUILT_MODULE_PATH := $($(LOCAL_2ND_ARCH_VAR_PREFIX)$(my_prefix)OUT_INTERMEDIATE_LIBRARIES)
-endif
-
-ifneq ($(filter STATIC_LIBRARIES SHARED_LIBRARIES,$(LOCAL_MODULE_CLASS)),)
-  prebuilt_module_is_a_library := true
-else
-  prebuilt_module_is_a_library :=
-endif
-
-# Don't install static libraries by default.
-ifndef LOCAL_UNINSTALLABLE_MODULE
-ifeq (STATIC_LIBRARIES,$(LOCAL_MODULE_CLASS))
-  LOCAL_UNINSTALLABLE_MODULE := true
-endif
-endif
-
-ifeq ($(LOCAL_STRIP_MODULE),true)
-  ifdef LOCAL_IS_HOST_MODULE
-    $(error Cannot strip host module LOCAL_PATH=$(LOCAL_PATH))
-  endif
-  ifeq ($(filter SHARED_LIBRARIES EXECUTABLES,$(LOCAL_MODULE_CLASS)),)
-    $(error Can strip only shared libraries or executables LOCAL_PATH=$(LOCAL_PATH))
-  endif
-  ifneq ($(LOCAL_PREBUILT_STRIP_COMMENTS),)
-    $(error Cannot strip scripts LOCAL_PATH=$(LOCAL_PATH))
-  endif
-  include $(BUILD_SYSTEM)/dynamic_binary.mk
-  built_module := $(linked_module)
-else  # LOCAL_STRIP_MODULE not true
-  include $(BUILD_SYSTEM)/base_rules.mk
-  built_module := $(LOCAL_BUILT_MODULE)
-
-ifdef prebuilt_module_is_a_library
-export_includes := $(intermediates)/export_includes
-$(export_includes): PRIVATE_EXPORT_C_INCLUDE_DIRS := $(LOCAL_EXPORT_C_INCLUDE_DIRS)
-$(export_includes) : $(LOCAL_MODULE_MAKEFILE)
-	@echo Export includes file: $< -- $@
-	$(hide) mkdir -p $(dir $@) && rm -f $@
-ifdef LOCAL_EXPORT_C_INCLUDE_DIRS
-	$(hide) for d in $(PRIVATE_EXPORT_C_INCLUDE_DIRS); do \
-	        echo "-I $$d" >> $@; \
-	        done
-else
-	$(hide) touch $@
-endif
-
-$(LOCAL_BUILT_MODULE) : | $(intermediates)/export_includes
-endif  # prebuilt_module_is_a_library
-
-# The real dependency will be added after all Android.mks are loaded and the install paths
-# of the shared libraries are determined.
-ifdef LOCAL_INSTALLED_MODULE
-ifdef LOCAL_SHARED_LIBRARIES
-$(my_prefix)DEPENDENCIES_ON_SHARED_LIBRARIES += $(LOCAL_MODULE):$(LOCAL_INSTALLED_MODULE):$(subst $(space),$(comma),$(LOCAL_SHARED_LIBRARIES))
-
-# We also need the LOCAL_BUILT_MODULE dependency,
-# since we use -rpath-link which points to the built module's path.
-built_shared_libraries := \
-    $(addprefix $($(my_prefix)OUT_INTERMEDIATE_LIBRARIES)/, \
-    $(addsuffix $($(my_prefix)SHLIB_SUFFIX), \
-        $(LOCAL_SHARED_LIBRARIES)))
-$(LOCAL_BUILT_MODULE) : $(built_shared_libraries)
-endif
-endif
-
-endif  # LOCAL_STRIP_MODULE not true
-
-PACKAGES.$(LOCAL_MODULE).OVERRIDES := $(strip $(LOCAL_OVERRIDES_PACKAGES))
-
-ifeq ($(LOCAL_CERTIFICATE),EXTERNAL)
-  # The magic string "EXTERNAL" means this package will be signed with
-  # the default dev key throughout the build process, but we expect
-  # the final package to be signed with a different key.
-  #
-  # This can be used for packages where we don't have access to the
-  # keys, but want the package to be predexopt'ed.
-  LOCAL_CERTIFICATE := $(DEFAULT_SYSTEM_DEV_CERTIFICATE)
-  PACKAGES.$(LOCAL_MODULE).EXTERNAL_KEY := 1
-
-  $(built_module) : PRIVATE_PRIVATE_KEY := $(LOCAL_CERTIFICATE).pk8
-  $(built_module) : PRIVATE_CERTIFICATE := $(LOCAL_CERTIFICATE).x509.pem
-endif
-ifeq ($(LOCAL_CERTIFICATE),)
-  ifneq ($(filter APPS,$(LOCAL_MODULE_CLASS)),)
-    # It is now a build error to add a prebuilt .apk without
-    # specifying a key for it.
-    $(error No LOCAL_CERTIFICATE specified for prebuilt "$(my_prebuilt_src_file)")
-  endif
-else ifeq ($(LOCAL_CERTIFICATE),PRESIGNED)
-  # The magic string "PRESIGNED" means this package is already checked
-  # signed with its release key.
-  #
-  # By setting .CERTIFICATE but not .PRIVATE_KEY, this package will be
-  # mentioned in apkcerts.txt (with certificate set to "PRESIGNED")
-  # but the dexpreopt process will not try to re-sign the app.
-  PACKAGES.$(LOCAL_MODULE).CERTIFICATE := PRESIGNED
-  PACKAGES := $(PACKAGES) $(LOCAL_MODULE)
-else
-  # If this is not an absolute certificate, assign it to a generic one.
-  ifeq ($(dir $(strip $(LOCAL_CERTIFICATE))),./)
-      LOCAL_CERTIFICATE := $(dir $(DEFAULT_SYSTEM_DEV_CERTIFICATE))$(LOCAL_CERTIFICATE)
-  endif
-
-  PACKAGES.$(LOCAL_MODULE).PRIVATE_KEY := $(LOCAL_CERTIFICATE).pk8
-  PACKAGES.$(LOCAL_MODULE).CERTIFICATE := $(LOCAL_CERTIFICATE).x509.pem
-  PACKAGES := $(PACKAGES) $(LOCAL_MODULE)
-
-  $(built_module) : PRIVATE_PRIVATE_KEY := $(LOCAL_CERTIFICATE).pk8
-  $(built_module) : PRIVATE_CERTIFICATE := $(LOCAL_CERTIFICATE).x509.pem
-endif
-
-ifneq ($(filter APPS,$(LOCAL_MODULE_CLASS)),)
-
-# Disable dex-preopt of prebuilts to save space
-LOCAL_DEX_PREOPT := false
-
-#######################################
-# defines built_odex along with rule to install odex
-include $(BUILD_SYSTEM)/dex_preopt_odex_install.mk
-#######################################
-ifdef LOCAL_DEX_PREOPT
-$(built_module): PRIVATE_DEX_PREOPT_IMAGE := $(LOCAL_DEX_PREOPT_IMAGE)
-$(built_module): PRIVATE_DEX_LOCATION := $(patsubst $(PRODUCT_OUT)%,%,$(LOCAL_INSTALLED_MODULE))
-$(built_module): PRIVATE_BUILT_ODEX := $(built_odex)
-# Make sure the boot jars get dexpreopt-ed first
-$(built_module) : $(DEXPREOPT_ONE_FILE_DEPENDENCY_BUILT_BOOT_PREOPT)
-$(built_module) : $(DEXPREOPT_ONE_FILE_DEPENDENCY_TOOLS)
-(built_module) : $(LOCAL_DEX_PREOPT_IMAGE)
-# built_odex is byproduct of LOCAL_BUILT_MODULE without its own build recipe.
-$(built_odex) : $(LOCAL_BUILT_MODULE)
-endif # LOCAL_DEX_PREOPT
-# Sign and align non-presigned .apks.
-$(built_module) : $(my_prebuilt_src_file) | $(ACP) $(ZIPALIGN) $(SIGNAPK_JAR)
-	$(transform-prebuilt-to-target)
-ifneq ($(LOCAL_CERTIFICATE),PRESIGNED)
-	$(sign-package)
-endif
-ifdef LOCAL_DEX_PREOPT
-	$(call dexpreopt-one-file,$(PRIVATE_DEX_PREOPT_IMAGE),$@,$(PRIVATE_DEX_LOCATION),$(PRIVATE_BUILT_ODEX))
-endif
-	$(align-package)
-
-else # LOCAL_MODULE_CLASS != APPS
-ifneq ($(LOCAL_PREBUILT_STRIP_COMMENTS),)
-$(built_module) : $(my_prebuilt_src_file)
-	$(transform-prebuilt-to-target-strip-comments)
-else
-$(built_module) : $(my_prebuilt_src_file) | $(ACP)
-	$(transform-prebuilt-to-target)
-ifneq ($(prebuilt_module_is_a_library),)
-  ifneq ($(LOCAL_IS_HOST_MODULE),)
-	$(transform-host-ranlib-copy-hack)
-  else
-	$(transform-ranlib-copy-hack)
-  endif
-endif
-endif
-endif # LOCAL_MODULE_CLASS != APPS
-
-ifeq ($(LOCAL_IS_HOST_MODULE)$(LOCAL_MODULE_CLASS),JAVA_LIBRARIES)
-# for target java libraries, the LOCAL_BUILT_MODULE is in a product-specific dir,
-# while the deps should be in the common dir, so we make a copy in the common dir.
-# For nonstatic library, $(common_javalib_jar) is the dependency file,
-# while $(common_classes_jar) is used to link.
-common_classes_jar := $(call intermediates-dir-for,JAVA_LIBRARIES,$(LOCAL_MODULE),,COMMON)/classes.jar
-common_javalib_jar := $(dir $(common_classes_jar))javalib.jar
-
-$(common_classes_jar) : $(my_prebuilt_src_file) | $(ACP)
-	$(transform-prebuilt-to-target)
-
-$(common_javalib_jar) : $(common_classes_jar) | $(ACP)
-	$(transform-prebuilt-to-target)
-
-# make sure the classes.jar and javalib.jar are built before $(LOCAL_BUILT_MODULE)
-$(built_module) : $(common_javalib_jar)
-endif # TARGET JAVA_LIBRARIES
-
-$(built_module) : $(LOCAL_ADDITIONAL_DEPENDENCIES)
-
-my_prebuilt_src_file :=
+endif # TARGET_2ND_ARCH
+endif # !LOCAL_IS_HOST_MODULE
 
 LOCAL_2ND_ARCH_VAR_PREFIX :=
+
+my_module_arch_supported :=
diff --git a/core/prebuilt_internal.mk b/core/prebuilt_internal.mk
new file mode 100644
index 0000000..18bddc5
--- /dev/null
+++ b/core/prebuilt_internal.mk
@@ -0,0 +1,217 @@
+###########################################################
+## Standard rules for copying files that are prebuilt
+##
+## Additional inputs from base_rules.make:
+## None.
+##
+###########################################################
+
+ifneq ($(LOCAL_PREBUILT_LIBS),)
+$(error dont use LOCAL_PREBUILT_LIBS anymore LOCAL_PATH=$(LOCAL_PATH))
+endif
+ifneq ($(LOCAL_PREBUILT_EXECUTABLES),)
+$(error dont use LOCAL_PREBUILT_EXECUTABLES anymore LOCAL_PATH=$(LOCAL_PATH))
+endif
+ifneq ($(LOCAL_PREBUILT_JAVA_LIBRARIES),)
+$(error dont use LOCAL_PREBUILT_JAVA_LIBRARIES anymore LOCAL_PATH=$(LOCAL_PATH))
+endif
+
+# Not much sense to check build prebuilts
+LOCAL_DONT_CHECK_MODULE := true
+
+ifdef LOCAL_PREBUILT_MODULE_FILE
+my_prebuilt_src_file := $(LOCAL_PREBUILT_MODULE_FILE)
+else
+my_prebuilt_src_file := $(LOCAL_PATH)/$(LOCAL_SRC_FILES)
+endif
+
+ifdef LOCAL_IS_HOST_MODULE
+  my_prefix := HOST_
+else
+  my_prefix := TARGET_
+endif
+ifeq (SHARED_LIBRARIES,$(LOCAL_MODULE_CLASS))
+  # Put the built targets of all shared libraries in a common directory
+  # to simplify the link line.
+  OVERRIDE_BUILT_MODULE_PATH := $($(LOCAL_2ND_ARCH_VAR_PREFIX)$(my_prefix)OUT_INTERMEDIATE_LIBRARIES)
+endif
+
+ifneq ($(filter STATIC_LIBRARIES SHARED_LIBRARIES,$(LOCAL_MODULE_CLASS)),)
+  prebuilt_module_is_a_library := true
+else
+  prebuilt_module_is_a_library :=
+endif
+
+# Don't install static libraries by default.
+ifndef LOCAL_UNINSTALLABLE_MODULE
+ifeq (STATIC_LIBRARIES,$(LOCAL_MODULE_CLASS))
+  LOCAL_UNINSTALLABLE_MODULE := true
+endif
+endif
+
+ifeq ($(LOCAL_STRIP_MODULE),true)
+  ifdef LOCAL_IS_HOST_MODULE
+    $(error Cannot strip host module LOCAL_PATH=$(LOCAL_PATH))
+  endif
+  ifeq ($(filter SHARED_LIBRARIES EXECUTABLES,$(LOCAL_MODULE_CLASS)),)
+    $(error Can strip only shared libraries or executables LOCAL_PATH=$(LOCAL_PATH))
+  endif
+  ifneq ($(LOCAL_PREBUILT_STRIP_COMMENTS),)
+    $(error Cannot strip scripts LOCAL_PATH=$(LOCAL_PATH))
+  endif
+  include $(BUILD_SYSTEM)/dynamic_binary.mk
+  built_module := $(linked_module)
+else  # LOCAL_STRIP_MODULE not true
+  include $(BUILD_SYSTEM)/base_rules.mk
+  built_module := $(LOCAL_BUILT_MODULE)
+
+ifdef prebuilt_module_is_a_library
+export_includes := $(intermediates)/export_includes
+$(export_includes): PRIVATE_EXPORT_C_INCLUDE_DIRS := $(LOCAL_EXPORT_C_INCLUDE_DIRS)
+$(export_includes) : $(LOCAL_MODULE_MAKEFILE)
+	@echo Export includes file: $< -- $@
+	$(hide) mkdir -p $(dir $@) && rm -f $@
+ifdef LOCAL_EXPORT_C_INCLUDE_DIRS
+	$(hide) for d in $(PRIVATE_EXPORT_C_INCLUDE_DIRS); do \
+	        echo "-I $$d" >> $@; \
+	        done
+else
+	$(hide) touch $@
+endif
+
+$(LOCAL_BUILT_MODULE) : | $(intermediates)/export_includes
+endif  # prebuilt_module_is_a_library
+
+# The real dependency will be added after all Android.mks are loaded and the install paths
+# of the shared libraries are determined.
+ifdef LOCAL_INSTALLED_MODULE
+ifdef LOCAL_SHARED_LIBRARIES
+$(my_prefix)DEPENDENCIES_ON_SHARED_LIBRARIES += $(LOCAL_MODULE):$(LOCAL_INSTALLED_MODULE):$(subst $(space),$(comma),$(LOCAL_SHARED_LIBRARIES))
+
+# We also need the LOCAL_BUILT_MODULE dependency,
+# since we use -rpath-link which points to the built module's path.
+built_shared_libraries := \
+    $(addprefix $($(my_prefix)OUT_INTERMEDIATE_LIBRARIES)/, \
+    $(addsuffix $($(my_prefix)SHLIB_SUFFIX), \
+        $(LOCAL_SHARED_LIBRARIES)))
+$(LOCAL_BUILT_MODULE) : $(built_shared_libraries)
+endif
+endif
+
+endif  # LOCAL_STRIP_MODULE not true
+
+PACKAGES.$(LOCAL_MODULE).OVERRIDES := $(strip $(LOCAL_OVERRIDES_PACKAGES))
+
+ifeq ($(LOCAL_CERTIFICATE),EXTERNAL)
+  # The magic string "EXTERNAL" means this package will be signed with
+  # the default dev key throughout the build process, but we expect
+  # the final package to be signed with a different key.
+  #
+  # This can be used for packages where we don't have access to the
+  # keys, but want the package to be predexopt'ed.
+  LOCAL_CERTIFICATE := $(DEFAULT_SYSTEM_DEV_CERTIFICATE)
+  PACKAGES.$(LOCAL_MODULE).EXTERNAL_KEY := 1
+
+  $(built_module) : PRIVATE_PRIVATE_KEY := $(LOCAL_CERTIFICATE).pk8
+  $(built_module) : PRIVATE_CERTIFICATE := $(LOCAL_CERTIFICATE).x509.pem
+endif
+ifeq ($(LOCAL_CERTIFICATE),)
+  ifneq ($(filter APPS,$(LOCAL_MODULE_CLASS)),)
+    # It is now a build error to add a prebuilt .apk without
+    # specifying a key for it.
+    $(error No LOCAL_CERTIFICATE specified for prebuilt "$(my_prebuilt_src_file)")
+  endif
+else ifeq ($(LOCAL_CERTIFICATE),PRESIGNED)
+  # The magic string "PRESIGNED" means this package is already checked
+  # signed with its release key.
+  #
+  # By setting .CERTIFICATE but not .PRIVATE_KEY, this package will be
+  # mentioned in apkcerts.txt (with certificate set to "PRESIGNED")
+  # but the dexpreopt process will not try to re-sign the app.
+  PACKAGES.$(LOCAL_MODULE).CERTIFICATE := PRESIGNED
+  PACKAGES := $(PACKAGES) $(LOCAL_MODULE)
+else
+  # If this is not an absolute certificate, assign it to a generic one.
+  ifeq ($(dir $(strip $(LOCAL_CERTIFICATE))),./)
+      LOCAL_CERTIFICATE := $(dir $(DEFAULT_SYSTEM_DEV_CERTIFICATE))$(LOCAL_CERTIFICATE)
+  endif
+
+  PACKAGES.$(LOCAL_MODULE).PRIVATE_KEY := $(LOCAL_CERTIFICATE).pk8
+  PACKAGES.$(LOCAL_MODULE).CERTIFICATE := $(LOCAL_CERTIFICATE).x509.pem
+  PACKAGES := $(PACKAGES) $(LOCAL_MODULE)
+
+  $(built_module) : PRIVATE_PRIVATE_KEY := $(LOCAL_CERTIFICATE).pk8
+  $(built_module) : PRIVATE_CERTIFICATE := $(LOCAL_CERTIFICATE).x509.pem
+endif
+
+ifneq ($(filter APPS,$(LOCAL_MODULE_CLASS)),)
+
+# Disable dex-preopt of prebuilts to save space
+LOCAL_DEX_PREOPT := false
+
+#######################################
+# defines built_odex along with rule to install odex
+include $(BUILD_SYSTEM)/dex_preopt_odex_install.mk
+#######################################
+ifdef LOCAL_DEX_PREOPT
+$(built_module): PRIVATE_DEX_PREOPT_IMAGE := $(LOCAL_DEX_PREOPT_IMAGE)
+$(built_module): PRIVATE_DEX_LOCATION := $(patsubst $(PRODUCT_OUT)%,%,$(LOCAL_INSTALLED_MODULE))
+$(built_module): PRIVATE_BUILT_ODEX := $(built_odex)
+# Make sure the boot jars get dexpreopt-ed first
+$(built_module) : $(DEXPREOPT_ONE_FILE_DEPENDENCY_BUILT_BOOT_PREOPT)
+$(built_module) : $(DEXPREOPT_ONE_FILE_DEPENDENCY_TOOLS)
+(built_module) : $(LOCAL_DEX_PREOPT_IMAGE)
+# built_odex is byproduct of LOCAL_BUILT_MODULE without its own build recipe.
+$(built_odex) : $(LOCAL_BUILT_MODULE)
+endif # LOCAL_DEX_PREOPT
+# Sign and align non-presigned .apks.
+$(built_module) : $(my_prebuilt_src_file) | $(ACP) $(ZIPALIGN) $(SIGNAPK_JAR)
+	$(transform-prebuilt-to-target)
+ifneq ($(LOCAL_CERTIFICATE),PRESIGNED)
+	$(sign-package)
+endif
+ifdef LOCAL_DEX_PREOPT
+	$(call dexpreopt-one-file,$(PRIVATE_DEX_PREOPT_IMAGE),$@,$(PRIVATE_DEX_LOCATION),$(PRIVATE_BUILT_ODEX))
+endif
+	$(align-package)
+
+else # LOCAL_MODULE_CLASS != APPS
+ifneq ($(LOCAL_PREBUILT_STRIP_COMMENTS),)
+$(built_module) : $(my_prebuilt_src_file)
+	$(transform-prebuilt-to-target-strip-comments)
+else
+$(built_module) : $(my_prebuilt_src_file) | $(ACP)
+	$(transform-prebuilt-to-target)
+ifneq ($(prebuilt_module_is_a_library),)
+  ifneq ($(LOCAL_IS_HOST_MODULE),)
+	$(transform-host-ranlib-copy-hack)
+  else
+	$(transform-ranlib-copy-hack)
+  endif
+endif
+endif
+endif # LOCAL_MODULE_CLASS != APPS
+
+ifeq ($(LOCAL_IS_HOST_MODULE)$(LOCAL_MODULE_CLASS),JAVA_LIBRARIES)
+# for target java libraries, the LOCAL_BUILT_MODULE is in a product-specific dir,
+# while the deps should be in the common dir, so we make a copy in the common dir.
+# For nonstatic library, $(common_javalib_jar) is the dependency file,
+# while $(common_classes_jar) is used to link.
+common_classes_jar := $(call intermediates-dir-for,JAVA_LIBRARIES,$(LOCAL_MODULE),,COMMON)/classes.jar
+common_javalib_jar := $(dir $(common_classes_jar))javalib.jar
+
+$(common_classes_jar) : $(my_prebuilt_src_file) | $(ACP)
+	$(transform-prebuilt-to-target)
+
+$(common_javalib_jar) : $(common_classes_jar) | $(ACP)
+	$(transform-prebuilt-to-target)
+
+# make sure the classes.jar and javalib.jar are built before $(LOCAL_BUILT_MODULE)
+$(built_module) : $(common_javalib_jar)
+endif # TARGET JAVA_LIBRARIES
+
+$(built_module) : $(LOCAL_ADDITIONAL_DEPENDENCIES)
+
+my_prebuilt_src_file :=
+
+LOCAL_2ND_ARCH_VAR_PREFIX :=
diff --git a/core/shared_library.mk b/core/shared_library.mk
index e86bab3..87b6068 100644
--- a/core/shared_library.mk
+++ b/core/shared_library.mk
@@ -10,14 +10,19 @@
 endif
 endif
 
-ifneq ($(TARGET_IS_64_BIT)|$(LOCAL_32_BIT_ONLY),true|true)
-# Build for TARGET_ARCH
 LOCAL_2ND_ARCH_VAR_PREFIX :=
+include $(BUILD_SYSTEM)/module_arch_supported.mk
+
+ifeq ($(my_module_arch_supported),true)
 include $(BUILD_SYSTEM)/shared_library_internal.mk
 endif
 
 ifdef TARGET_2ND_ARCH
-ifneq ($(LOCAL_NO_2ND_ARCH),true)
+
+LOCAL_2ND_ARCH_VAR_PREFIX := $(TARGET_2ND_ARCH_VAR_PREFIX)
+include $(BUILD_SYSTEM)/module_arch_supported.mk
+
+ifeq ($(my_module_arch_supported),true)
 # Build for TARGET_2ND_ARCH
 OVERRIDE_BUILT_MODULE_PATH :=
 LOCAL_BUILT_MODULE :=
@@ -27,9 +32,17 @@
 LOCAL_INSTALLED_MODULE_STEM :=
 LOCAL_INTERMEDIATE_TARGETS :=
 
-LOCAL_2ND_ARCH_VAR_PREFIX := $(TARGET_2ND_ARCH_VAR_PREFIX)
 include $(BUILD_SYSTEM)/shared_library_internal.mk
+
+endif
+
 LOCAL_2ND_ARCH_VAR_PREFIX :=
 
-endif # LOCAL_NO_2ND_ARCH
 endif # TARGET_2ND_ARCH
+
+my_module_arch_supported :=
+
+###########################################################
+## Copy headers to the install tree
+###########################################################
+include $(BUILD_COPY_HEADERS)
diff --git a/core/static_library.mk b/core/static_library.mk
index c733b86..d6e8d51 100644
--- a/core/static_library.mk
+++ b/core/static_library.mk
@@ -1,11 +1,16 @@
-ifneq ($(TARGET_IS_64_BIT)|$(LOCAL_32_BIT_ONLY),true|true)
-# Build for TARGET_ARCH
 LOCAL_2ND_ARCH_VAR_PREFIX :=
+include $(BUILD_SYSTEM)/module_arch_supported.mk
+
+ifeq ($(my_module_arch_supported),true)
 include $(BUILD_SYSTEM)/static_library_internal.mk
 endif
 
 ifdef TARGET_2ND_ARCH
-ifneq ($(LOCAL_NO_2ND_ARCH),true)
+
+LOCAL_2ND_ARCH_VAR_PREFIX := $(TARGET_2ND_ARCH_VAR_PREFIX)
+include $(BUILD_SYSTEM)/module_arch_supported.mk
+
+ifeq ($(my_module_arch_supported),true)
 # Build for TARGET_2ND_ARCH
 OVERRIDE_BUILT_MODULE_PATH :=
 LOCAL_BUILT_MODULE :=
@@ -15,9 +20,17 @@
 LOCAL_INSTALLED_MODULE_STEM :=
 LOCAL_INTERMEDIATE_TARGETS :=
 
-LOCAL_2ND_ARCH_VAR_PREFIX := $(TARGET_2ND_ARCH_VAR_PREFIX)
 include $(BUILD_SYSTEM)/static_library_internal.mk
+
+endif
+
 LOCAL_2ND_ARCH_VAR_PREFIX :=
 
-endif # LOCAL_NO_2ND_ARCH
 endif # TARGET_2ND_ARCH
+
+my_module_arch_supported :=
+
+###########################################################
+## Copy headers to the install tree
+###########################################################
+include $(BUILD_COPY_HEADERS)
diff --git a/core/tasks/cts.mk b/core/tasks/cts.mk
index ed8c125..f991a9e 100644
--- a/core/tasks/cts.mk
+++ b/core/tasks/cts.mk
@@ -28,6 +28,8 @@
 VMTESTSTF_INTERMEDIATES :=$(call intermediates-dir-for,JAVA_LIBRARIES,vm-tests-tf,HOST)
 VMTESTSTF_JAR := $(VMTESTSTF_INTERMEDIATES)/android.core.vm-tests-tf.jar
 
+# The list of test packages that core-tests (libcore/Android.mk)
+# is split into.
 CTS_CORE_CASE_LIST := \
 	android.core.tests.libcore.package.dalvik \
 	android.core.tests.libcore.package.com \
@@ -36,8 +38,26 @@
 	android.core.tests.libcore.package.tests \
 	android.core.tests.libcore.package.org \
 	android.core.tests.libcore.package.libcore \
+	android.core.tests.libcore.package.jsr166 \
+	android.core.tests.libcore.package.harmony_annotation \
+	android.core.tests.libcore.package.harmony_java_io \
+	android.core.tests.libcore.package.harmony_java_lang \
+	android.core.tests.libcore.package.harmony_java_math \
+	android.core.tests.libcore.package.harmony_java_net \
+	android.core.tests.libcore.package.harmony_java_nio \
+	android.core.tests.libcore.package.harmony_java_text \
+	android.core.tests.libcore.package.harmony_java_util \
+	android.core.tests.libcore.package.harmony_javax_security \
 	android.core.tests.runner
 
+# The list of test packages that apache-harmony-tests (external/apache-harmony/Android.mk)
+# is split into.
+CTS_CORE_CASE_LIST += \
+	android.core.tests.libcore.package.harmony_beans \
+	android.core.tests.libcore.package.harmony_logging \
+	android.core.tests.libcore.package.harmony_prefs \
+	android.core.tests.libcore.package.harmony_sql
+
 # Depend on the full package paths rather than the phony targets to avoid
 # rebuilding the packages every time.
 CTS_CORE_CASES := $(foreach pkg,$(CTS_CORE_CASE_LIST),$(call intermediates-dir-for,APPS,$(pkg))/package.apk)
@@ -85,12 +105,14 @@
 BOUNCYCASTLE_INTERMEDIATES :=$(call intermediates-dir-for,JAVA_LIBRARIES,bouncycastle,,COMMON)
 APACHEXML_INTERMEDIATES :=$(call intermediates-dir-for,JAVA_LIBRARIES,apache-xml,,COMMON)
 OKHTTP_INTERMEDIATES :=$(call intermediates-dir-for,JAVA_LIBRARIES,okhttp,,COMMON)
+APACHEHARMONY_INTERMEDIATES :=$(call intermediates-dir-for,JAVA_LIBRARIES,apache-harmony-tests,,COMMON)
 SQLITEJDBC_INTERMEDIATES :=$(call intermediates-dir-for,JAVA_LIBRARIES,sqlite-jdbc,,COMMON)
 JUNIT_INTERMEDIATES :=$(call intermediates-dir-for,JAVA_LIBRARIES,core-junit,,COMMON)
 CORETESTS_INTERMEDIATES :=$(call intermediates-dir-for,JAVA_LIBRARIES,core-tests,,COMMON)
+JSR166TESTS_INTERMEDIATES :=$(call intermediates-dir-for,JAVA_LIBRARIES,jsr166-tests,,COMMON)
 CONSCRYPTTESTS_INTERMEDIATES :=$(call intermediates-dir-for,JAVA_LIBRARIES,conscrypt-tests,,COMMON)
 
-GEN_CLASSPATH := $(CORE_INTERMEDIATES)/classes.jar:$(CONSCRYPT_INTERMEDIATES)/classes.jar:$(BOUNCYCASTLE_INTERMEDIATES)/classes.jar:$(APACHEXML_INTERMEDIATES)/classes.jar:$(OKHTTP_INTERMEDIATES)/classes.jar:$(JUNIT_INTERMEDIATES)/classes.jar:$(SQLITEJDBC_INTERMEDIATES)/javalib.jar:$(CORETESTS_INTERMEDIATES)/javalib.jar:$(CONSCRYPTTESTS_INTERMEDIATES)/javalib.jar
+GEN_CLASSPATH := $(CORE_INTERMEDIATES)/classes.jar:$(CONSCRYPT_INTERMEDIATES)/classes.jar:$(BOUNCYCASTLE_INTERMEDIATES)/classes.jar:$(APACHEXML_INTERMEDIATES)/classes.jar:$(APACHEHARMONY_INTERMEDIATES)/classes.jar:$(OKHTTP_INTERMEDIATES)/classes.jar:$(JUNIT_INTERMEDIATES)/classes.jar:$(SQLITEJDBC_INTERMEDIATES)/javalib.jar:$(CORETESTS_INTERMEDIATES)/javalib.jar:$(JSR166TESTS_INTERMEDIATES)/javalib.jar:$(CONSCRYPTTESTS_INTERMEDIATES)/javalib.jar
 
 CTS_CORE_XMLS := \
 	$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.dalvik.xml \
@@ -99,7 +121,21 @@
 	$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.sun.xml \
 	$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.tests.xml \
 	$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.org.xml \
-	$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.libcore.xml
+	$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.libcore.xml \
+	$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.jsr166.xml \
+	$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_annotation.xml \
+	$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_java_io.xml \
+	$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_java_lang.xml \
+	$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_java_math.xml \
+	$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_java_net.xml \
+	$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_java_nio.xml \
+	$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_java_text.xml \
+	$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_java_util.xml \
+	$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_javax_security.xml \
+	$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_beans.xml \
+	$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_logging.xml \
+	$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_prefs.xml \
+	$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_sql.xml \
 
 $(CTS_CORE_XMLS): PRIVATE_CLASSPATH:=$(GEN_CLASSPATH)
 # Why does this depend on javalib.jar instead of classes.jar?  Because
@@ -107,7 +143,7 @@
 # build system requires that dependencies use javalib.jar.  If
 # javalib.jar is up-to-date, then classes.jar is as well.  Depending
 # on classes.jar will build the files incorrectly.
-CTS_CORE_XMLS_DEPS := $(CTS_CORE_CASES) $(HOST_OUT_JAVA_LIBRARIES)/descGen.jar $(HOST_OUT_JAVA_LIBRARIES)/junit.jar $(CORE_INTERMEDIATES)/javalib.jar $(BOUNCYCASTLE_INTERMEDIATES)/javalib.jar $(APACHEXML_INTERMEDIATES)/javalib.jar $(OKHTTP_INTERMEDIATES)/javalib.jar $(SQLITEJDBC_INTERMEDIATES)/javalib.jar $(JUNIT_INTERMEDIATES)/javalib.jar $(CORETESTS_INTERMEDIATES)/javalib.jar $(CONSCRYPTTESTS_INTERMEDIATES)/javalib.jar | $(ACP)
+CTS_CORE_XMLS_DEPS := $(CTS_CORE_CASES) $(HOST_OUT_JAVA_LIBRARIES)/descGen.jar $(HOST_OUT_JAVA_LIBRARIES)/junit.jar $(CORE_INTERMEDIATES)/javalib.jar $(BOUNCYCASTLE_INTERMEDIATES)/javalib.jar $(APACHEXML_INTERMEDIATES)/javalib.jar $(APACHEHARMONY_INTERMEDIATES)/javalib.jar $(OKHTTP_INTERMEDIATES)/javalib.jar $(SQLITEJDBC_INTERMEDIATES)/javalib.jar $(JUNIT_INTERMEDIATES)/javalib.jar $(CORETESTS_INTERMEDIATES)/javalib.jar $(JSR166TESTS_INTERMEDIATES)/javalib.jar $(CONSCRYPTTESTS_INTERMEDIATES)/javalib.jar build/core/tasks/cts.mk | $(ACP)
 
 $(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.dalvik.xml: $(CTS_CORE_XMLS_DEPS)
 	$(hide) mkdir -p $(CTS_TESTCASES_OUT)
@@ -158,6 +194,105 @@
 		$(CORETESTS_INTERMEDIATES)/javalib.jar,libcore,\
 		libcore/expectations)
 
+$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.jsr166.xml: $(CTS_CORE_XMLS_DEPS)
+	$(hide) mkdir -p $(CTS_TESTCASES_OUT)
+	$(call generate-core-test-description,$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.jsr166,\
+		cts/tests/core/libcore/jsr166/AndroidManifest.xml,\
+		$(JSR166TESTS_INTERMEDIATES)/javalib.jar,jsr166,\
+		libcore/expectations)
+
+$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_annotation.xml: $(CTS_CORE_XMLS_DEPS)
+	$(hide) mkdir -p $(CTS_TESTCASES_OUT)
+	$(call generate-core-test-description,$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_annotation,\
+		cts/tests/core/libcore/harmony_annotation/AndroidManifest.xml,\
+		$(CORETESTS_INTERMEDIATES)/javalib.jar,org.apache.harmony.annotation.tests,\
+		libcore/expectations)
+
+$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_java_io.xml: $(CTS_CORE_XMLS_DEPS)
+	$(hide) mkdir -p $(CTS_TESTCASES_OUT)
+	$(call generate-core-test-description,$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_java_io,\
+		cts/tests/core/libcore/harmony_java_io/AndroidManifest.xml,\
+		$(CORETESTS_INTERMEDIATES)/javalib.jar,org.apache.harmony.tests.java.io,\
+		libcore/expectations)
+
+$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_java_lang.xml: $(CTS_CORE_XMLS_DEPS)
+	$(hide) mkdir -p $(CTS_TESTCASES_OUT)
+	$(call generate-core-test-description,$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_java_lang,\
+		cts/tests/core/libcore/harmony_java_lang/AndroidManifest.xml,\
+		$(CORETESTS_INTERMEDIATES)/javalib.jar,org.apache.harmony.tests.java.lang,\
+		libcore/expectations)
+
+$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_java_math.xml: $(CTS_CORE_XMLS_DEPS)
+	$(hide) mkdir -p $(CTS_TESTCASES_OUT)
+	$(call generate-core-test-description,$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_java_math,\
+		cts/tests/core/libcore/harmony_java_math/AndroidManifest.xml,\
+		$(CORETESTS_INTERMEDIATES)/javalib.jar,org.apache.harmony.tests.java.math,\
+		libcore/expectations)
+
+$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_java_net.xml: $(CTS_CORE_XMLS_DEPS)
+	$(hide) mkdir -p $(CTS_TESTCASES_OUT)
+	$(call generate-core-test-description,$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_java_net,\
+		cts/tests/core/libcore/harmony_java_net/AndroidManifest.xml,\
+		$(CORETESTS_INTERMEDIATES)/javalib.jar,org.apache.harmony.tests.java.net,\
+		libcore/expectations)
+
+$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_java_nio.xml: $(CTS_CORE_XMLS_DEPS)
+	$(hide) mkdir -p $(CTS_TESTCASES_OUT)
+	$(call generate-core-test-description,$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_java_nio,\
+		cts/tests/core/libcore/harmony_java_nio/AndroidManifest.xml,\
+		$(CORETESTS_INTERMEDIATES)/javalib.jar,org.apache.harmony.tests.java.nio,\
+		libcore/expectations)
+
+$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_java_text.xml: $(CTS_CORE_XMLS_DEPS)
+	$(hide) mkdir -p $(CTS_TESTCASES_OUT)
+	$(call generate-core-test-description,$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_java_text,\
+		cts/tests/core/libcore/harmony_java_text/AndroidManifest.xml,\
+		$(CORETESTS_INTERMEDIATES)/javalib.jar,org.apache.harmony.tests.java.text,\
+		libcore/expectations)
+
+$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_java_util.xml: $(CTS_CORE_XMLS_DEPS)
+	$(hide) mkdir -p $(CTS_TESTCASES_OUT)
+	$(call generate-core-test-description,$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_java_util,\
+		cts/tests/core/libcore/harmony_java_util/AndroidManifest.xml,\
+		$(CORETESTS_INTERMEDIATES)/javalib.jar,org.apache.harmony.tests.java.util,\
+		libcore/expectations)
+
+$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_javax_security.xml: $(CTS_CORE_XMLS_DEPS)
+	$(hide) mkdir -p $(CTS_TESTCASES_OUT)
+	$(call generate-core-test-description,$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_javax_security,\
+		cts/tests/core/libcore/harmony_javax_security/AndroidManifest.xml,\
+		$(CORETESTS_INTERMEDIATES)/javalib.jar,org.apache.harmony.tests.javax.security,\
+		libcore/expectations)
+
+$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_beans.xml: $(CTS_CORE_XMLS_DEPS)
+	$(hide) mkdir -p $(CTS_TESTCASES_OUT)
+	$(call generate-core-test-description,$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_beans,\
+		cts/tests/core/libcore/harmony_beans/AndroidManifest.xml,\
+		$(APACHEHARMONY_INTERMEDIATES)/javalib.jar,com.android.org.apache.harmony.beans,\
+		libcore/expectations external/apache-harmony/Android.mk)
+
+$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_logging.xml: $(CTS_CORE_XMLS_DEPS)
+	$(hide) mkdir -p $(CTS_TESTCASES_OUT)
+	$(call generate-core-test-description,$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_logging,\
+		cts/tests/core/libcore/harmony_logging/AndroidManifest.xml,\
+		$(APACHEHARMONY_INTERMEDIATES)/javalib.jar,com.android.org.apache.harmony.logging,\
+		libcore/expectations external/apache-harmony/Android.mk)
+
+
+$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_prefs.xml: $(CTS_CORE_XMLS_DEPS)
+	$(hide) mkdir -p $(CTS_TESTCASES_OUT)
+	$(call generate-core-test-description,$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_prefs,\
+		cts/tests/core/libcore/harmony_prefs/AndroidManifest.xml,\
+		$(APACHEHARMONY_INTERMEDIATES)/javalib.jar,com.android.org.apache.harmony.prefs,\
+		libcore/expectations external/apache-harmony/Android.mk)
+
+$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_sql.xml: $(CTS_CORE_XMLS_DEPS)
+	$(hide) mkdir -p $(CTS_TESTCASES_OUT)
+	$(call generate-core-test-description,$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.harmony_sql,\
+		cts/tests/core/libcore/harmony_sql/AndroidManifest.xml,\
+		$(APACHEHARMONY_INTERMEDIATES)/javalib.jar,com.android.org.apache.harmony.sql,\
+		libcore/expectations external/apache-harmony/Android.mk)
+
 # ----- Generate the test descriptions for the vm-tests-tf -----
 #
 CORE_VM_TEST_TF_DESC := $(CTS_TESTCASES_OUT)/android.core.vm-tests-tf.xml
diff --git a/core/tasks/vendor_module_check.mk b/core/tasks/vendor_module_check.mk
index c51a40c..96557e3 100644
--- a/core/tasks/vendor_module_check.mk
+++ b/core/tasks/vendor_module_check.mk
@@ -71,11 +71,12 @@
 
 $(foreach m, $(_vendor_check_modules), \
   $(if $(filter vendor/%, $(ALL_MODULES.$(m).PATH)),\
-    $(if $(filter $(_vendor_owner_whitelist), $(ALL_MODULES.$(m).OWNER)),,\
-      $(error Error: vendor module "$(m)" in $(ALL_MODULES.$(m).PATH) with unknown owner \
-        "$(ALL_MODULES.$(m).OWNER)" in product "$(TARGET_PRODUCT)"))\
-    $(if $(ALL_MODULES.$(m).INSTALLED),\
-      $(eval _vendor_module_owner_info += $(patsubst $(PRODUCT_OUT)/%,%,$(ALL_MODULES.$(m).INSTALLED)):$(ALL_MODULES.$(m).OWNER)))))
+    $(if $(filter-out FAKE, $(ALL_MODULES.$(m).CLASS)),\
+      $(if $(filter $(_vendor_owner_whitelist), $(ALL_MODULES.$(m).OWNER)),,\
+        $(error Error: vendor module "$(m)" in $(ALL_MODULES.$(m).PATH) with unknown owner \
+          "$(ALL_MODULES.$(m).OWNER)" in product "$(TARGET_PRODUCT)"))\
+      $(if $(ALL_MODULES.$(m).INSTALLED),\
+        $(eval _vendor_module_owner_info += $(patsubst $(PRODUCT_OUT)/%,%,$(ALL_MODULES.$(m).INSTALLED)):$(ALL_MODULES.$(m).OWNER))))))
 
 endif
 
diff --git a/envsetup.sh b/envsetup.sh
index 65849d9..5170063 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -602,7 +602,7 @@
             T=
             while [ \( ! \( -f $TOPFILE \) \) -a \( $PWD != "/" \) ]; do
                 \cd ..
-                T=`PWD= /bin/pwd`
+                T=`PWD= /bin/pwd -P`
             done
             \cd $HERE
             if [ -f "$T/$TOPFILE" ]; then
diff --git a/target/board/generic_arm64/BoardConfig.mk b/target/board/generic_arm64/BoardConfig.mk
index 03284d7..0bdcd99 100644
--- a/target/board/generic_arm64/BoardConfig.mk
+++ b/target/board/generic_arm64/BoardConfig.mk
@@ -21,6 +21,14 @@
 TARGET_CPU_VARIANT := generic
 TARGET_CPU_ABI := arm64-v8a
 
+TARGET_2ND_ARCH := arm
+TARGET_2ND_ARCH_VARIANT := armv7-a-neon
+TARGET_2ND_CPU_VARIANT := generic
+TARGET_2ND_CPU_ABI := armeabi-v7a
+TARGET_2ND_CPU_ABI2 := armeabi
+
+TARGET_USES_64_BIT_BINDER := true
+
 # no hardware camera
 USE_CAMERA_STUB := true
 
@@ -51,3 +59,5 @@
 # Temporarily disable linking against compiler_rt until there is an arm64
 # version
 WITHOUT_LIBCOMPILER_RT := true
+
+BUILD_EMULATOR := false
diff --git a/target/board/generic_mips64/BoardConfig.mk b/target/board/generic_mips64/BoardConfig.mk
index 26e4d69..1f465ae 100644
--- a/target/board/generic_mips64/BoardConfig.mk
+++ b/target/board/generic_mips64/BoardConfig.mk
@@ -28,6 +28,12 @@
 endif
 TARGET_CPU_ABI  := mips64
 
+TARGET_2ND_ARCH := mips
+ifeq (,$(TARGET_2ND_ARCH_VARIANT))
+TARGET_2ND_ARCH_VARIANT :=  mips32r2-fp
+endif
+TARGET_CPU_ABI  := mips
+
 # The emulator (qemu) uses the Goldfish devices
 HAVE_HTC_AUDIO_DRIVER := true
 BOARD_USES_GENERIC_AUDIO := true
diff --git a/target/board/generic_x86_64/BoardConfig.mk b/target/board/generic_x86_64/BoardConfig.mk
index 8a2fd13..5e808e2 100755
--- a/target/board/generic_x86_64/BoardConfig.mk
+++ b/target/board/generic_x86_64/BoardConfig.mk
@@ -11,6 +11,12 @@
 TARGET_ARCH_VARIANT := x86_64
 TARGET_PRELINK_MODULE := false
 
+TARGET_2ND_CPU_ABI := x86
+TARGET_2ND_ARCH := x86
+TARGET_2ND_ARCH_VARIANT := x86
+
+TARGET_USES_64_BIT_BINDER := true
+
 # The IA emulator (qemu) uses the Goldfish devices
 HAVE_HTC_AUDIO_DRIVER := true
 BOARD_USES_GENERIC_AUDIO := true
diff --git a/target/product/aosp_arm64.mk b/target/product/aosp_arm64.mk
index 7f97a61..8ff0bd1 100644
--- a/target/product/aosp_arm64.mk
+++ b/target/product/aosp_arm64.mk
@@ -22,6 +22,8 @@
 $(call inherit-product, $(SRC_TARGET_DIR)/product/aosp_base_telephony.mk)
 $(call inherit-product, $(SRC_TARGET_DIR)/board/generic_arm64/device.mk)
 
+PRODUCT_RUNTIMES := runtime_libart_default
+
 include $(SRC_TARGET_DIR)/product/emulator.mk
 PRODUCT_NAME := aosp_arm64
 PRODUCT_DEVICE := generic_arm64
diff --git a/target/product/core_minimal.mk b/target/product/core_minimal.mk
index 79ba0d4..17000ac 100644
--- a/target/product/core_minimal.mk
+++ b/target/product/core_minimal.mk
@@ -37,6 +37,7 @@
     com.android.media.remotedisplay.xml \
     drmserver \
     framework-res \
+    idmap \
     installd \
     ip \
     ip-up-vpn \
diff --git a/target/product/embedded.mk b/target/product/embedded.mk
index d370af9..ada1323 100644
--- a/target/product/embedded.mk
+++ b/target/product/embedded.mk
@@ -22,6 +22,7 @@
     adbd \
     bootanimation \
     debuggerd \
+    debuggerd64 \
     dumpstate \
     dumpsys \
     gralloc.default \
@@ -58,6 +59,7 @@
     libui \
     libutils \
     linker \
+    linker64 \
     logcat \
     logwrapper \
     mkshrc \
diff --git a/target/product/full_mips64.mk b/target/product/full_mips64.mk
index d0214b8..3f171e0 100644
--- a/target/product/full_mips64.mk
+++ b/target/product/full_mips64.mk
@@ -22,6 +22,8 @@
 $(call inherit-product, $(SRC_TARGET_DIR)/product/aosp_base_telephony.mk)
 $(call inherit-product, $(SRC_TARGET_DIR)/board/generic_mips64/device.mk)
 
+PRODUCT_RUNTIMES := runtime_libart_default
+
 include $(SRC_TARGET_DIR)/product/emulator.mk
 
 # Overrides
diff --git a/target/product/full_x86_64.mk b/target/product/full_x86_64.mk
index 644f2a2..8b964c2 100755
--- a/target/product/full_x86_64.mk
+++ b/target/product/full_x86_64.mk
@@ -26,6 +26,8 @@
 $(call inherit-product, $(SRC_TARGET_DIR)/product/aosp_base_telephony.mk)
 $(call inherit-product, $(SRC_TARGET_DIR)/board/generic_x86_64/device.mk)
 
+PRODUCT_RUNTIMES := runtime_libart_default
+
 include $(SRC_TARGET_DIR)/product/emulator.mk
 
 ifdef NET_ETH0_STARTONBOOT
diff --git a/target/product/generic_no_telephony.mk b/target/product/generic_no_telephony.mk
index 963d56a..2e0dffc 100644
--- a/target/product/generic_no_telephony.mk
+++ b/target/product/generic_no_telephony.mk
@@ -44,18 +44,13 @@
     SystemUI \
     TeleService \
     CalendarProvider \
-    bluetooth-health \
     WallpaperCropper
 
 PRODUCT_PACKAGES += \
-    audio \
+    bcc \
     clatd \
     clatd.conf \
-    dhcpcd.conf \
-    network \
-    pand \
-    pppd \
-    sdptool
+    pppd
 
 PRODUCT_PACKAGES += \
     librs_jni \
diff --git a/target/product/sdk.mk b/target/product/sdk.mk
index bc59782..2fa39d8 100644
--- a/target/product/sdk.mk
+++ b/target/product/sdk.mk
@@ -92,6 +92,9 @@
 
 $(call inherit-product-if-exists, frameworks/base/data/sounds/AllAudio.mk)
 $(call inherit-product-if-exists, frameworks/base/data/fonts/fonts.mk)
+$(call inherit-product-if-exists, external/noto-fonts/fonts.mk)
+$(call inherit-product-if-exists, external/naver-fonts/fonts.mk)
+$(call inherit-product-if-exists, external/sil-fonts/fonts.mk)
 $(call inherit-product-if-exists, frameworks/base/data/keyboards/keyboards.mk)
 $(call inherit-product-if-exists, frameworks/webview/chromium/chromium.mk)
 $(call inherit-product, $(SRC_TARGET_DIR)/product/core.mk)
diff --git a/tools/post_process_props.py b/tools/post_process_props.py
index 9d69736..5d1b350 100755
--- a/tools/post_process_props.py
+++ b/tools/post_process_props.py
@@ -16,12 +16,17 @@
 
 import sys
 
+# See PROP_VALUE_MAX system_properties.h.
+# PROP_VALUE_MAX in system_properties.h includes the termination NUL,
+# so we decrease it by 1 here.
+PROP_VALUE_MAX = 91
+
 # Put the modifications that you need to make into the /system/build.prop into this
 # function. The prop object has get(name) and put(name,value) methods.
 def mangle_build_prop(prop):
   pass
 
-# Put the modifications that you need to make into the /system/build.prop into this
+# Put the modifications that you need to make into the /default.prop into this
 # function. The prop object has get(name) and put(name,value) methods.
 def mangle_default_prop(prop):
   # If ro.debuggable is 1, then enable adb on USB by default
@@ -39,9 +44,47 @@
   if not prop.get("persist.sys.usb.config"):
     prop.put("persist.sys.usb.config", "none");
 
+def validate(prop):
+  """Validate the properties.
+
+  Returns:
+    True if nothing is wrong.
+  """
+  check_pass = True
+  buildprops = prop.to_dict()
+  dev_build = buildprops.get("ro.build.version.incremental",
+                             "").startswith("eng")
+  for key, value in buildprops.iteritems():
+    # Check build properties' length.
+    if len(value) > PROP_VALUE_MAX:
+      # If dev build, show a warning message, otherwise fail the
+      # build with error message
+      if dev_build:
+        sys.stderr.write("warning: %s exceeds %d bytes: " %
+                         (key, PROP_VALUE_MAX))
+        sys.stderr.write("%s (%d)\n" % (value, len(value)))
+        sys.stderr.write("warning: This will cause the %s " % key)
+        sys.stderr.write("property return as empty at runtime\n")
+      else:
+        check_pass = False
+        sys.stderr.write("error: %s cannot exceed %d bytes: " %
+                         (key, PROP_VALUE_MAX))
+        sys.stderr.write("%s (%d)\n" % (value, len(value)))
+  return check_pass
+
 class PropFile:
+
   def __init__(self, lines):
-    self.lines = [s[:-1] for s in lines]
+    self.lines = [s.strip() for s in lines]
+
+  def to_dict(self):
+    props = {}
+    for line in self.lines:
+      if not line or line.startswith("#"):
+        continue
+      key, value = line.split("=", 1)
+      props[key] = value
+    return props
 
   def get(self, name):
     key = name + "="
@@ -69,6 +112,7 @@
   f.close()
 
   properties = PropFile(lines)
+
   if filename.endswith("/build.prop"):
     mangle_build_prop(properties)
   elif filename.endswith("/default.prop"):
@@ -77,6 +121,9 @@
     sys.stderr.write("bad command line: " + str(argv) + "\n")
     sys.exit(1)
 
+  if not validate(properties):
+    sys.exit(1)
+
   f = open(filename, 'w+')
   properties.write(f)
   f.close()