diff --git a/CleanSpec.mk b/CleanSpec.mk
index dae2b35..7b317e2 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -239,6 +239,11 @@
 # Change ro.zygote for core_64_bit.mk from zygote32_64 to zygote64_32
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/root/default.prop)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/recovery/root/default.prop)
+
+# Adding dalvik.vm.dex2oat-Xms, dalvik.vm.dex2oat-Xmx
+# dalvik.vm.image-dex2oat-Xms, and dalvik.vm.image-dex2oat-Xmx
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/root/default.prop)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/recovery/root/default.prop)
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************
diff --git a/core/base_rules.mk b/core/base_rules.mk
index 97787f4..e840047 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -413,8 +413,8 @@
 full_shared_java_libs := $(addprefix $(HOST_OUT_JAVA_LIBRARIES)/,\
     $(addsuffix $(COMMON_JAVA_PACKAGE_SUFFIX),$(LOCAL_JAVA_LIBRARIES)))
 full_java_lib_deps := $(full_shared_java_libs)
-endif # LOCAL_BUILD_HOST_DEX
-else
+endif # USE_CORE_LIB_BOOTCLASSPATH
+else # !LOCAL_IS_HOST_MODULE
 full_shared_java_libs := $(call java-lib-files,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE))
 full_java_lib_deps := $(call java-lib-deps,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE))
 endif # !LOCAL_IS_HOST_MODULE
@@ -499,7 +499,7 @@
 
 # Propagate local configuration options to this target.
 $(LOCAL_INTERMEDIATE_TARGETS) : PRIVATE_PATH:=$(LOCAL_PATH)
-$(LOCAL_INTERMEDIATE_TARGETS) : PRIVATE_AAPT_FLAGS:= $(LOCAL_AAPT_FLAGS)
+$(LOCAL_INTERMEDIATE_TARGETS) : PRIVATE_AAPT_FLAGS:= $(LOCAL_AAPT_FLAGS) $(PRODUCT_AAPT_FLAGS)
 $(LOCAL_INTERMEDIATE_TARGETS) : PRIVATE_JAVA_LIBRARIES:= $(LOCAL_JAVA_LIBRARIES)
 $(LOCAL_INTERMEDIATE_TARGETS) : PRIVATE_MANIFEST_PACKAGE_NAME:= $(LOCAL_MANIFEST_PACKAGE_NAME)
 $(LOCAL_INTERMEDIATE_TARGETS) : PRIVATE_MANIFEST_INSTRUMENTATION_FOR:= $(LOCAL_MANIFEST_INSTRUMENTATION_FOR)
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index c6a09d8..93ec226 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -118,7 +118,6 @@
 LOCAL_RENDERSCRIPT_FLAGS:=
 LOCAL_RENDERSCRIPT_SKIP_INSTALL:=
 LOCAL_RENDERSCRIPT_TARGET_API:=
-LOCAL_BUILD_HOST_DEX:=
 LOCAL_DEX_PREOPT:= # '',true,false,nostripping
 LOCAL_DEX_PREOPT_IMAGE_LOCATION:=
 LOCAL_PROTOC_OPTIMIZE_TYPE:= # lite(default),micro,nano,full
@@ -167,6 +166,7 @@
 LOCAL_GENERATED_SOURCES_$(TARGET_ARCH):=
 LOCAL_REQUIRED_MODULES_$(TARGET_ARCH):=
 LOCAL_CLANG_$(TARGET_ARCH):=
+LOCAL_PREBUILT_JNI_LIBS_$(TARGET_ARCH):=
 ifdef TARGET_2ND_ARCH
 LOCAL_SRC_FILES_$(TARGET_2ND_ARCH):=
 LOCAL_CFLAGS_$(TARGET_2ND_ARCH):=
@@ -181,6 +181,7 @@
 LOCAL_GENERATED_SOURCES_$(TARGET_2ND_ARCH):=
 LOCAL_REQUIRED_MODULES_$(TARGET_2ND_ARCH):=
 LOCAL_CLANG_$(TARGET_2ND_ARCH):=
+LOCAL_PREBUILT_JNI_LIBS_$(TARGET_2ND_ARCH):=
 endif
 LOCAL_SRC_FILES_$(HOST_ARCH):=
 LOCAL_CFLAGS_$(HOST_ARCH):=
diff --git a/core/combo/HOST_darwin-x86_64.mk b/core/combo/HOST_darwin-x86_64.mk
index 8ad3ba7..0bc0227 100644
--- a/core/combo/HOST_darwin-x86_64.mk
+++ b/core/combo/HOST_darwin-x86_64.mk
@@ -17,8 +17,6 @@
 # Configuration for Darwin (Mac OS X) on x86_64.
 # Included by combo/select.mk
 
-HOST_IS_64_BIT := true
-
 HOST_GLOBAL_CFLAGS += -m64
 HOST_GLOBAL_LDFLAGS += -m64
 
diff --git a/core/combo/HOST_linux-x86_64.mk b/core/combo/HOST_linux-x86_64.mk
index 8f3a311..53a3ae8 100644
--- a/core/combo/HOST_linux-x86_64.mk
+++ b/core/combo/HOST_linux-x86_64.mk
@@ -17,8 +17,6 @@
 # Configuration for builds hosted on linux-x86_64.
 # Included by combo/select.mk
 
-HOST_IS_64_BIT := true
-
 ifeq ($(strip $(HOST_TOOLCHAIN_PREFIX)),)
 HOST_TOOLCHAIN_PREFIX := prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.11-4.6/bin/x86_64-linux-
 endif
diff --git a/core/combo/HOST_windows-x86_64.mk b/core/combo/HOST_windows-x86_64.mk
index 9edc619..c77d82c 100644
--- a/core/combo/HOST_windows-x86_64.mk
+++ b/core/combo/HOST_windows-x86_64.mk
@@ -22,8 +22,6 @@
 TOOLS_PREFIX := #prebuilt/windows/host/bin/
 TOOLS_EXE_SUFFIX := .exe
 
-HOST_IS_64_BIT := true
-
 # Settings to use MinGW has a cross-compiler under Linux
 ifneq ($(findstring Linux,$(UNAME)),)
 ifneq ($(strip $(USE_MINGW)),)
diff --git a/core/combo/TARGET_linux-arm.mk b/core/combo/TARGET_linux-arm.mk
index 4fe0bcd..ea4a83d 100644
--- a/core/combo/TARGET_linux-arm.mk
+++ b/core/combo/TARGET_linux-arm.mk
@@ -226,7 +226,6 @@
 $(hide) $(PRIVATE_CXX) \
 	-nostdlib -Wl,-soname,$(notdir $@) \
 	-Wl,--gc-sections \
-	-Wl,-shared,-Bsymbolic \
 	-shared \
 	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \
diff --git a/core/combo/TARGET_linux-arm64.mk b/core/combo/TARGET_linux-arm64.mk
index 4bb665c..02c4b99 100644
--- a/core/combo/TARGET_linux-arm64.mk
+++ b/core/combo/TARGET_linux-arm64.mk
@@ -43,8 +43,6 @@
 TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
 endif
 
-TARGET_IS_64_BIT := true
-
 TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk
 ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),)
 $(error Unknown ARM architecture version: $(TARGET_ARCH_VARIANT))
@@ -164,7 +162,6 @@
 $(hide) $(PRIVATE_CXX) \
 	-nostdlib -Wl,-soname,$(notdir $@) \
 	-Wl,--gc-sections \
-	-Wl,-shared,-Bsymbolic \
 	-shared \
 	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \
diff --git a/core/combo/TARGET_linux-mips.mk b/core/combo/TARGET_linux-mips.mk
index f52c375..d702cc5 100644
--- a/core/combo/TARGET_linux-mips.mk
+++ b/core/combo/TARGET_linux-mips.mk
@@ -217,7 +217,6 @@
 $(hide) $(PRIVATE_CXX) \
 	-nostdlib -Wl,-soname,$(notdir $@) \
 	-Wl,--gc-sections \
-	-Wl,-shared,-Bsymbolic \
 	-shared \
 	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \
diff --git a/core/combo/TARGET_linux-mips64.mk b/core/combo/TARGET_linux-mips64.mk
index e9f5adb..aa456ef 100644
--- a/core/combo/TARGET_linux-mips64.mk
+++ b/core/combo/TARGET_linux-mips64.mk
@@ -43,8 +43,6 @@
 TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
 endif
 
-TARGET_IS_64_BIT := true
-
 TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk
 ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),)
 $(error Unknown MIPS architecture variant: $(TARGET_ARCH_VARIANT))
@@ -227,7 +225,6 @@
 	-nostdlib -Wl,-soname,$(notdir $@) \
 	-Wl,--gc-sections \
 	-shared \
-	-Wl,-shared,-Bsymbolic \
 	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \
 	$(PRIVATE_ALL_OBJECTS) \
diff --git a/core/combo/TARGET_linux-x86.mk b/core/combo/TARGET_linux-x86.mk
index 960c58a..2ca99ef 100644
--- a/core/combo/TARGET_linux-x86.mk
+++ b/core/combo/TARGET_linux-x86.mk
@@ -182,7 +182,7 @@
 $(hide) $(PRIVATE_CXX) \
 	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	 -nostdlib -Wl,-soname,$(notdir $@) \
-	 -shared -Bsymbolic \
+	 -shared \
 	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \
 	$(PRIVATE_ALL_OBJECTS) \
diff --git a/core/combo/TARGET_linux-x86_64.mk b/core/combo/TARGET_linux-x86_64.mk
index 2c2fa6b..9dbcc19 100644
--- a/core/combo/TARGET_linux-x86_64.mk
+++ b/core/combo/TARGET_linux-x86_64.mk
@@ -31,8 +31,6 @@
 TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
 endif
 
-TARGET_IS_64_BIT := true
-
 # 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
@@ -161,6 +159,7 @@
 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
 
 TARGET_C_INCLUDES := \
@@ -187,7 +186,7 @@
 $(hide) $(PRIVATE_CXX) \
 	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	 -nostdlib -Wl,-soname,$(notdir $@) \
-	 -shared -Bsymbolic \
+	 -shared \
 	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \
 	$(PRIVATE_ALL_OBJECTS) \
diff --git a/core/definitions.mk b/core/definitions.mk
index c2c8823..441c186 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -1723,10 +1723,20 @@
     -F $@
 endef
 
+# We need the extra blank line, so that the command will be on a separate line.
+# $(1): the ABI name
+# $(2): the list of shared libraies
+define _add-jni-shared-libs-to-package-per-abi
+$(hide) cp $(2) $(dir $@)lib/$(1)
+
+endef
+
 define add-jni-shared-libs-to-package
 $(hide) rm -rf $(dir $@)lib
-$(hide) mkdir -p $(dir $@)lib/$(PRIVATE_JNI_SHARED_LIBRARIES_ABI)
-$(hide) cp $(PRIVATE_JNI_SHARED_LIBRARIES) $(dir $@)lib/$(PRIVATE_JNI_SHARED_LIBRARIES_ABI)
+$(hide) mkdir -p $(addprefix $(dir $@)lib/,$(PRIVATE_JNI_SHARED_LIBRARIES_ABI))
+$(foreach abi,$(PRIVATE_JNI_SHARED_LIBRARIES_ABI),\
+  $(call _add-jni-shared-libs-to-package-per-abi,$(abi),\
+    $(patsubst $(abi):%,%,$(filter $(abi):%,$(PRIVATE_JNI_SHARED_LIBRARIES)))))
 $(hide) (cd $(dir $@) && zip -r $(notdir $@) lib)
 $(hide) rm -rf $(dir $@)lib
 endef
diff --git a/core/dex_preopt.mk b/core/dex_preopt.mk
index ab970f9..76fc130 100644
--- a/core/dex_preopt.mk
+++ b/core/dex_preopt.mk
@@ -18,7 +18,11 @@
 
 # $(1): the .jar or .apk to remove classes.dex
 define dexpreopt-remove-classes.dex
-$(hide) $(AAPT) remove $(1) classes.dex
+$(hide) zip --quiet --delete $(1) classes.dex; \
+dex_index=2; \
+while zip --quiet --delete $(1) classes$${dex_index}.dex > /dev/null; do \
+  let dex_index=dex_index+1; \
+done
 endef
 
 # Special rules for building stripped boot jars that override java_library.mk rules
diff --git a/core/dex_preopt_libart.mk b/core/dex_preopt_libart.mk
index 411af75..8fc0c67 100644
--- a/core/dex_preopt_libart.mk
+++ b/core/dex_preopt_libart.mk
@@ -27,6 +27,15 @@
 LIBART_IMG_TARGET_BASE_ADDRESS := 0x70000000
 endif
 
+define get-product-default-property
+$(strip $(patsubst $(1)=%,%,$(filter $(1)=%,$(PRODUCT_DEFAULT_PROPERTY_OVERRIDES))))
+endef
+
+DEX2OAT_IMAGE_XMS := $(call get-product-default-property,dalvik.vm.image-dex2oat-Xms)
+DEX2OAT_IMAGE_XMX := $(call get-product-default-property,dalvik.vm.image-dex2oat-Xmx)
+DEX2OAT_XMS := $(call get-product-default-property,dalvik.vm.dex2oat-Xms)
+DEX2OAT_XMX := $(call get-product-default-property,dalvik.vm.dex2oat-Xmx)
+
 ########################################################################
 # The full system boot classpath
 
@@ -68,7 +77,7 @@
 $(hide) rm -f $(2)
 $(hide) mkdir -p $(dir $(2))
 $(hide) $(DEX2OATD) \
-	--runtime-arg -Xms64m --runtime-arg -Xmx64m \
+	--runtime-arg -Xms$(DEX2OAT_XMS) --runtime-arg -Xmx$(DEX2OAT_XMX) \
 	--boot-image=$(PRIVATE_DEX_PREOPT_IMAGE_LOCATION) \
 	--dex-file=$(1) \
 	--dex-location=$(PRIVATE_DEX_LOCATION) \
diff --git a/core/dex_preopt_libart_boot.mk b/core/dex_preopt_libart_boot.mk
index 70130b6..7eefc0b 100644
--- a/core/dex_preopt_libart_boot.mk
+++ b/core/dex_preopt_libart_boot.mk
@@ -43,7 +43,8 @@
 	@echo "target dex2oat: $@ ($?)"
 	@mkdir -p $(dir $@)
 	@mkdir -p $(dir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)LIBART_TARGET_BOOT_OAT_UNSTRIPPED))
-	$(hide) $(DEX2OATD) --runtime-arg -Xms256m --runtime-arg -Xmx256m --image-classes=$(PRELOADED_CLASSES) \
+	$(hide) $(DEX2OATD) --runtime-arg -Xms$(DEX2OAT_IMAGE_XMS) --runtime-arg -Xmx$(DEX2OAT_IMAGE_XMX) \
+		--image-classes=$(PRELOADED_CLASSES) \
 		$(addprefix --dex-file=,$(LIBART_TARGET_BOOT_DEX_FILES)) \
 		$(addprefix --dex-location=,$(LIBART_TARGET_BOOT_DEX_LOCATIONS)) \
 		--oat-symbols=$($(PRIVATE_2ND_ARCH_VAR_PREFIX)LIBART_TARGET_BOOT_OAT_UNSTRIPPED) \
diff --git a/core/dex_preopt_odex_install.mk b/core/dex_preopt_odex_install.mk
index caaa16d..613b058 100644
--- a/core/dex_preopt_odex_install.mk
+++ b/core/dex_preopt_odex_install.mk
@@ -9,11 +9,13 @@
 else # WITH_DEXPREOPT=true
   ifeq (,$(TARGET_BUILD_APPS)) # TARGET_BUILD_APPS empty
     ifndef LOCAL_DEX_PREOPT # LOCAL_DEX_PREOPT undefined
-      ifeq (,$(LOCAL_APK_LIBRARIES)) # LOCAL_APK_LIBRARIES empty
-        LOCAL_DEX_PREOPT := $(DEX_PREOPT_DEFAULT)
-      else # LOCAL_APK_LIBRARIES not empty
-        LOCAL_DEX_PREOPT := nostripping
-      endif # LOCAL_APK_LIBRARIES not empty
+      ifneq ($(filter $(TARGET_OUT)/%,$(my_module_path)),) # Installed to system.img.
+        ifeq (,$(LOCAL_APK_LIBRARIES)) # LOCAL_APK_LIBRARIES empty
+          LOCAL_DEX_PREOPT := $(DEX_PREOPT_DEFAULT)
+        else # LOCAL_APK_LIBRARIES not empty
+          LOCAL_DEX_PREOPT := nostripping
+        endif # LOCAL_APK_LIBRARIES not empty
+      endif # Installed to system.img.
     endif # LOCAL_DEX_PREOPT undefined
   endif # TARGET_BUILD_APPS empty
 endif # WITH_DEXPREOPT=true
diff --git a/core/droiddoc.mk b/core/droiddoc.mk
index 90ef0b3..ecfe3dc 100644
--- a/core/droiddoc.mk
+++ b/core/droiddoc.mk
@@ -53,6 +53,10 @@
 
 ifeq ($(LOCAL_IS_HOST_MODULE),true)
 $(full_target): PRIVATE_BOOTCLASSPATH :=
+full_java_libs := $(addprefix $(HOST_OUT_JAVA_LIBRARIES)/,\
+  $(addsuffix $(COMMON_JAVA_PACKAGE_SUFFIX),$(LOCAL_JAVA_LIBRARIES)))
+full_java_lib_deps := $(full_java_libs)
+
 else
 
 ifneq ($(LOCAL_SDK_VERSION),)
@@ -70,11 +74,10 @@
 endif  # LOCAL_SDK_VERSION
 LOCAL_JAVA_LIBRARIES := $(sort $(LOCAL_JAVA_LIBRARIES))
 
+full_java_libs := $(call java-lib-files,$(LOCAL_JAVA_LIBRARIES)) $(LOCAL_CLASSPATH)
+full_java_lib_deps := $(call java-lib-deps,$(LOCAL_JAVA_LIBRARIES)) $(LOCAL_CLASSPATH)
 endif # !LOCAL_IS_HOST_MODULE
 
-full_java_libs := $(call java-lib-files,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE)) $(LOCAL_CLASSPATH)
-full_java_lib_deps := $(call java-lib-deps,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE)) $(LOCAL_CLASSPATH)
-
 $(full_target): PRIVATE_CLASSPATH := $(subst $(space),:,$(full_java_libs))
 
 
diff --git a/core/envsetup.mk b/core/envsetup.mk
index 1962513..d0b5846 100644
--- a/core/envsetup.mk
+++ b/core/envsetup.mk
@@ -72,19 +72,13 @@
 ifeq (,$(BUILD_HOST_64bit))
 # Default to 32-bit-by-default multilib host build.
 HOST_PREFER_32_BIT := true
-ifeq ($(HOST_PREFER_32_BIT),true)
-BUILD_HOST_64bit := true
-endif
 endif
 
 # HOST_ARCH
 ifneq (,$(findstring x86_64,$(UNAME)))
   HOST_ARCH := x86_64
   HOST_2ND_ARCH := x86
-else ifneq (,$(findstring 86,$(UNAME)))
-  # It's not officially supported!
-  HOST_ARCH := x86
-  HOST_2ND_ARCH :=
+  HOST_IS_64_BIT := true
 endif
 
 ifeq ($(HOST_PREFER_32_BIT),true)
@@ -170,6 +164,9 @@
 
 TARGET_OS := linux
 # TARGET_ARCH should be set by BoardConfig.mk and will be checked later
+ifneq ($(filter %64,$(TARGET_ARCH)),)
+TARGET_IS_64_BIT := true
+endif
 
 # the target build type defaults to release
 ifneq ($(TARGET_BUILD_TYPE),debug)
@@ -218,7 +215,7 @@
 BUILD_OUT_EXECUTABLES := $(BUILD_OUT)/bin
 
 HOST_OUT_EXECUTABLES := $(HOST_OUT)/bin
-HOST_OUT_SHARED_LIBRARIES := $(HOST_OUT)/lib
+HOST_OUT_SHARED_LIBRARIES := $(HOST_OUT)/lib64
 HOST_OUT_JAVA_LIBRARIES := $(HOST_OUT)/framework
 HOST_OUT_SDK_ADDON := $(HOST_OUT)/sdk_addon
 
@@ -236,13 +233,7 @@
 HOST_2ND_ARCH_MODULE_SUFFIX := _32
 $(HOST_2ND_ARCH_VAR_PREFIX)HOST_OUT_INTERMEDIATES := $(HOST_OUT)/obj32
 $(HOST_2ND_ARCH_VAR_PREFIX)HOST_OUT_INTERMEDIATE_LIBRARIES := $($(HOST_2ND_ARCH_VAR_PREFIX)HOST_OUT_INTERMEDIATES)/lib
-ifeq ($(HOST_PREFER_32_BIT),true)
-# To keep path compatibility, put 32-bit libs in lib/ and 64-bit libs in lib64/.
-HOST_OUT_SHARED_LIBRARIES := $(HOST_OUT)/lib64
 $(HOST_2ND_ARCH_VAR_PREFIX)HOST_OUT_SHARED_LIBRARIES := $(HOST_OUT)/lib
-else
-$(HOST_2ND_ARCH_VAR_PREFIX)HOST_OUT_SHARED_LIBRARIES := $(HOST_OUT)/lib32
-endif
 $(HOST_2ND_ARCH_VAR_PREFIX)HOST_OUT_EXECUTABLES := $(HOST_OUT_EXECUTABLES)
 
 # The default host library path.
@@ -260,7 +251,7 @@
 TARGET_OUT := $(PRODUCT_OUT)/$(TARGET_COPY_OUT_SYSTEM)
 TARGET_OUT_EXECUTABLES := $(TARGET_OUT)/bin
 TARGET_OUT_OPTIONAL_EXECUTABLES := $(TARGET_OUT)/xbin
-ifneq ($(filter %64,$(TARGET_ARCH)),)
+ifeq ($(TARGET_IS_64_BIT),true)
 # /system/lib always contains 32-bit libraries,
 # and /system/lib64 (if present) always contains 64-bit libraries.
 TARGET_OUT_SHARED_LIBRARIES := $(TARGET_OUT)/lib64
@@ -294,19 +285,24 @@
 TARGET_OUT_DATA_KEYLAYOUT := $(TARGET_OUT_KEYLAYOUT)
 TARGET_OUT_DATA_KEYCHARS := $(TARGET_OUT_KEYCHARS)
 TARGET_OUT_DATA_ETC := $(TARGET_OUT_ETC)
+ifeq ($(TARGET_IS_64_BIT),true)
+TARGET_OUT_DATA_NATIVE_TESTS := $(TARGET_OUT_DATA)/nativetest64
+else
 TARGET_OUT_DATA_NATIVE_TESTS := $(TARGET_OUT_DATA)/nativetest
+endif
 TARGET_OUT_DATA_FAKE := $(TARGET_OUT_DATA)/fake_packages
 
 $(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_DATA_EXECUTABLES := $(TARGET_OUT_DATA_EXECUTABLES)
 $(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_DATA_SHARED_LIBRARIES := $($(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_SHARED_LIBRARIES)
 $(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_DATA_APPS := $(TARGET_OUT_DATA_APPS)
+$(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_DATA_NATIVE_TESTS := $(TARGET_OUT_DATA)/nativetest
 
 TARGET_OUT_CACHE := $(PRODUCT_OUT)/cache
 
 TARGET_OUT_VENDOR := $(PRODUCT_OUT)/$(TARGET_COPY_OUT_VENDOR)
 TARGET_OUT_VENDOR_EXECUTABLES := $(TARGET_OUT_VENDOR)/bin
 TARGET_OUT_VENDOR_OPTIONAL_EXECUTABLES := $(TARGET_OUT_VENDOR)/xbin
-ifneq ($(filter %64,$(TARGET_ARCH)),)
+ifeq ($(TARGET_IS_64_BIT),true)
 TARGET_OUT_VENDOR_SHARED_LIBRARIES := $(TARGET_OUT_VENDOR)/lib64
 else
 TARGET_OUT_VENDOR_SHARED_LIBRARIES := $(TARGET_OUT_VENDOR)/lib
diff --git a/core/executable_prefer_symlink.mk b/core/executable_prefer_symlink.mk
index 2f04d0d..f66a5f2 100644
--- a/core/executable_prefer_symlink.mk
+++ b/core/executable_prefer_symlink.mk
@@ -4,21 +4,30 @@
 #
 # Note: now only limited to the binaries that will be installed under system/bin directory
 
-my_symlink := $(addprefix $(TARGET_OUT)/bin/, $(LOCAL_MODULE))
 # Create link to the one used depending on the target
 # configuration. Note that we require the TARGET_IS_64_BIT
 # check because 32 bit targets may not define TARGET_PREFER_32_BIT_APPS
 # et al. since those variables make no sense in that context.
-ifeq ($(TARGET_IS_64_BIT),true)
-ifneq ($(TARGET_PREFER_32_BIT_APPS),true)
-  $(my_symlink): PRIVATE_SRC_BINARY_NAME := $(LOCAL_MODULE_STEM_64)
-else
-  $(my_symlink): PRIVATE_SRC_BINARY_NAME := $(LOCAL_MODULE_STEM_32)
-endif
-else
-  $(my_symlink): PRIVATE_SRC_BINARY_NAME := $(LOCAL_MODULE_STEM_32)
-endif
 
+ifneq ($(LOCAL_IS_HOST_MODULE),true)
+  my_symlink := $(addprefix $(TARGET_OUT)/bin/, $(LOCAL_MODULE))
+  ifeq ($(TARGET_IS_64_BIT),true)
+    ifneq ($(TARGET_PREFER_32_BIT_APPS),true)
+$(my_symlink): PRIVATE_SRC_BINARY_NAME := $(LOCAL_MODULE_STEM_64)
+    else
+$(my_symlink): PRIVATE_SRC_BINARY_NAME := $(LOCAL_MODULE_STEM_32)
+    endif
+  else
+$(my_symlink): PRIVATE_SRC_BINARY_NAME := $(LOCAL_MODULE_STEM_32)
+  endif
+else
+  my_symlink := $(addprefix $(HOST_OUT)/bin/, $(LOCAL_MODULE))
+  ifneq ($(HOST_PREFER_32_BIT),true)
+$(my_symlink): PRIVATE_SRC_BINARY_NAME := $(LOCAL_MODULE_STEM_64)
+  else
+$(my_symlink): PRIVATE_SRC_BINARY_NAME := $(LOCAL_MODULE_STEM_32)
+  endif
+endif
 
 $(my_symlink): $(LOCAL_INSTALLED_MODULE) $(LOCAL_MODULE_MAKEFILE)
 	@echo "Symlink: $@ -> $(PRIVATE_SRC_BINARY_NAME)"
@@ -30,4 +39,7 @@
 # local module name
 ALL_MODULES.$(LOCAL_MODULE).INSTALLED += $(my_symlink)
 
+# Create the symlink when you run mm/mmm or "make <module_name>"
+$(LOCAL_MODULE) : $(my_symlink)
+
 my_symlink :=
diff --git a/core/install_jni_libs.mk b/core/install_jni_libs.mk
index 700d106..da3032d 100644
--- a/core/install_jni_libs.mk
+++ b/core/install_jni_libs.mk
@@ -1,28 +1,16 @@
 # Decides how to install the jni libraries needed by an apk.
 # Input variables:
-#   LOCAL_JNI_SHARED_LIBRARIES
-#   LOCAL_INSTALLED_MODULE
+#   my_module_multilib, LOCAL_2ND_ARCH_VAR_PREFIX (from package.mk or prebuilt.mk)
 #   rs_compatibility_jni_libs (from java.mk)
 #   my_module_path (from base_rules.mk)
 #   partition_tag (from base_rules.mk)
 #   my_prebuilt_src_file (from prebuilt_internal.mk)
 #
 # Output variables:
-#   jni_shared_libraries, jni_shared_libraries_abi, if we are going to embed the libraries into the apk;
-#   my_extracted_jni_libs, if we extract jni libs from prebuilt apk.
+#   jni_shared_libraries, jni_shared_libraries_abi, jni_shared_libraries_with_abis if we are going to embed the libraries into the apk;
+#   extracted_jni_libs, if we extract jni libs from prebuilt apk.
 #
 
-jni_shared_libraries := \
-    $(addprefix $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_OUT_INTERMEDIATE_LIBRARIES)/, \
-      $(addsuffix .so, \
-          $(LOCAL_JNI_SHARED_LIBRARIES)))
-
-# Include RS dynamically-generated libraries as well
-# Keep this ifneq, as the += otherwise adds spaces that need to be stripped.
-ifneq ($(rs_compatibility_jni_libs),)
-jni_shared_libraries += $(rs_compatibility_jni_libs)
-endif
-
 my_embed_jni :=
 ifneq ($(TARGET_BUILD_APPS),)
 my_embed_jni := true
@@ -35,87 +23,71 @@
 my_embed_jni := true
 endif
 
-# App-specific lib path.
-my_app_lib_path :=  $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET$(partition_tag)_OUT_SHARED_LIBRARIES)/$(basename $(my_installed_module_stem))
-my_extracted_jni_libs :=
+jni_shared_libraries :=
+jni_shared_libraries_abis :=
+# jni_shared_libraries_with_abis is a list of <abi>:<path-to-the-built-jni-lib>
+jni_shared_libraries_with_abis :=
+extracted_jni_libs :=
 
-ifdef my_embed_jni
-# App explicitly requires the prebuilt NDK stl shared libraies.
-# The NDK stl shared libraries should never go to the system image.
-ifneq ($(filter $(LOCAL_NDK_STL_VARIANT), stlport_shared c++_shared),)
-ifndef LOCAL_SDK_VERSION
-$(error LOCAL_SDK_VERSION must be defined with LOCAL_NDK_STL_VARIANT, \
-    LOCAL_PACKAGE_NAME=$(LOCAL_PACKAGE_NAME))
+#######################################
+# For TARGET_ARCH
+my_2nd_arch_prefix :=
+my_add_jni :=
+# The module is built for TARGET_ARCH
+ifeq ($(my_2nd_arch_prefix),$(LOCAL_2ND_ARCH_VAR_PREFIX))
+my_add_jni := true
 endif
+# Or it explicitly requires both
+ifeq ($(my_module_multilib),both)
+my_add_jni := true
 endif
-ifeq (stlport_shared,$(LOCAL_NDK_STL_VARIANT))
-jni_shared_libraries += \
-    $(HISTORICAL_NDK_VERSIONS_ROOT)/current/sources/cxx-stl/stlport/libs/$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)CPU_ABI)/libstlport_shared.so
-else ifeq (c++_shared,$(LOCAL_NDK_STL_VARIANT))
-jni_shared_libraries += \
-    $(HISTORICAL_NDK_VERSIONS_ROOT)/current/sources/cxx-stl/llvm-libc++/libs/$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)CPU_ABI)/libc++_shared.so
+ifeq ($(my_add_jni),true)
+my_prebuilt_jni_libs := $(LOCAL_PREBUILT_JNI_LIBS_$(TARGET_ARCH))
+ifndef my_prebuilt_jni_libs
+my_prebuilt_jni_libs := $(LOCAL_PREBUILT_JNI_LIBS)
 endif
+include $(BUILD_SYSTEM)/install_jni_libs_internal.mk
+jni_shared_libraries += $(my_jni_shared_libraries)
+jni_shared_libraries_abis += $(my_jni_shared_libraries_abi)
+jni_shared_libraries_with_abis += $(addprefix $(my_jni_shared_libraries_abi):,\
+    $(my_jni_shared_libraries))
+extracted_jni_libs += $(my_extracted_jni_libs)
 
-# 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
+# Include RS dynamically-generated libraries as well
+# TODO: Add multilib support once RS supports generating multilib libraries.
+jni_shared_libraries += $(rs_compatibility_jni_libs)
+jni_shared_libraries_with_abis += $(addprefix $(my_jni_shared_libraries_abi):,\
+    $(rs_compatibility_jni_libs))
+endif  # my_add_jni
 
-else  # not my_embed_jni
+#######################################
+# For TARGET_2ND_ARCH
+ifdef TARGET_2ND_ARCH
+my_2nd_arch_prefix := $(TARGET_2ND_ARCH_VAR_PREFIX)
+my_add_jni :=
+# The module is built for TARGET_2ND_ARCH
+ifeq ($(my_2nd_arch_prefix),$(LOCAL_2ND_ARCH_VAR_PREFIX))
+my_add_jni := true
+endif
+# Or it explicitly requires both
+ifeq ($(my_module_multilib),both)
+my_add_jni := true
+endif
+ifeq ($(my_add_jni),true)
+my_prebuilt_jni_libs := $(LOCAL_PREBUILT_JNI_LIBS_$(TARGET_2ND_ARCH))
+ifndef my_prebuilt_jni_libs
+my_prebuilt_jni_libs := $(LOCAL_PREBUILT_JNI_LIBS)
+endif
+include $(BUILD_SYSTEM)/install_jni_libs_internal.mk
+jni_shared_libraries += $(my_jni_shared_libraries)
+jni_shared_libraries_abis += $(my_jni_shared_libraries_abi)
+jni_shared_libraries_with_abis += $(addprefix $(my_jni_shared_libraries_abi):,\
+    $(my_jni_shared_libraries))
+extracted_jni_libs += $(my_extracted_jni_libs)
+endif  # my_add_jni
+endif  # TARGET_2ND_ARCH
 
 jni_shared_libraries := $(strip $(jni_shared_libraries))
-ifneq ($(jni_shared_libraries),)
-# The jni libaries will be installed to the system.img.
-my_jni_filenames := $(notdir $(jni_shared_libraries))
-# Make sure the JNI libraries get installed
-$(LOCAL_INSTALLED_MODULE) : | $(addprefix $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET$(partition_tag)_OUT_SHARED_LIBRARIES)/, $(my_jni_filenames))
-
-# Create symlink in the app specific lib path
-ifdef LOCAL_POST_INSTALL_CMD
-my_leading_separator := ;
-else
-my_leading_separator :=
-endif
-$(LOCAL_INSTALLED_MODULE): PRIVATE_POST_INSTALL_CMD += \
-  $(my_leading_separator)mkdir -p $(my_app_lib_path) \
-  $(foreach lib, $(my_jni_filenames), ;ln -sf ../$(lib) $(my_app_lib_path)/$(lib))
-
-# Clear jni_shared_libraries to not embed it into the apk.
-jni_shared_libraries :=
-endif  # $(jni_shared_libraries) not empty
-endif  # my_embed_jni
-
-ifdef LOCAL_PREBUILT_JNI_LIBS
-# Install prebuilt JNI libs to the app specific lib path.
-# Files like @path/to/libfoo.so (path inside the apk) are JNI libs extracted from the prebuilt apk;
-# Files like path/to/libfoo.so (path relative to LOCAL_PATH) are prebuilts in the source tree.
-my_extracted_jni_libs := $(patsubst @%,%, \
-    $(filter @%, $(LOCAL_PREBUILT_JNI_LIBS)))
-ifdef my_extracted_jni_libs
-ifndef my_prebuilt_src_file
-$(error No prebuilt apk to extract prebuilt jni libraries $(my_extracted_jni_libs))
-endif
-# We use the first jni lib file as dependency.
-my_installed_prebuilt_jni := $(my_app_lib_path)/$(notdir $(firstword $(my_extracted_jni_libs)))
-$(my_installed_prebuilt_jni): PRIVATE_JNI_LIBS := $(my_extracted_jni_libs)
-$(my_installed_prebuilt_jni): $(my_prebuilt_src_file)
-	@echo "Extract JNI libs ($@ <- $<)"
-	@mkdir -p $(dir $@)
-	$(hide) unzip -j -o -d $(dir $@) $< $(PRIVATE_JNI_LIBS) && touch $@
-
-$(LOCAL_INSTALLED_MODULE) : | $(my_installed_prebuilt_jni)
-endif
-
-my_prebulit_jni_libs := $(addprefix $(LOCAL_PATH)/, \
-    $(filter-out @%, $(LOCAL_PREBUILT_JNI_LIBS)))
-ifdef my_prebulit_jni_libs
-$(foreach lib, $(my_prebulit_jni_libs), \
-    $(eval $(call copy-one-file, $(lib), $(my_app_lib_path)/$(notdir $(lib)))))
-
-$(LOCAL_INSTALLED_MODULE) : | $(addprefix $(my_app_lib_path)/, $(notdir $(my_prebulit_jni_libs)))
-endif
-endif  # LOCAL_PREBULT_JNI_LIBS
+jni_shared_libraries_abis := $(sort $(jni_shared_libraries_abis))
+jni_shared_libraries_with_abis := $(strip $(jni_shared_libraries_with_abis))
+extracted_jni_libs := $(strip $(extracted_jni_libs))
diff --git a/core/install_jni_libs_internal.mk b/core/install_jni_libs_internal.mk
new file mode 100644
index 0000000..eb90c50
--- /dev/null
+++ b/core/install_jni_libs_internal.mk
@@ -0,0 +1,104 @@
+# Install jni libraries for one arch.
+# Input variables:
+#   my_2nd_arch_prefix: indicate if this is for TARGET_2ND_ARCH.
+#   my_embed_jni: indicate if we want to embed the jni libs in the apk.
+#   my_prebuilt_jni_libs
+#   my_installed_module_stem (from configure_module_stem.mk)
+#   partition_tag (from base_rules.mk)
+#   my_prebuilt_src_file (from prebuilt_internal.mk)
+#
+# Output variables:
+#   my_jni_shared_libraries, my_jni_shared_libraries_abi, if we are going to embed the libraries into the apk;
+#   my_extracted_jni_libs, if we extract jni libs from prebuilt apk.
+#
+
+my_jni_shared_libraries := \
+    $(addprefix $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/, \
+      $(addsuffix .so, \
+          $(LOCAL_JNI_SHARED_LIBRARIES)))
+
+# App-specific lib path.
+my_app_lib_path :=  $($(my_2nd_arch_prefix)TARGET_OUT$(partition_tag)_SHARED_LIBRARIES)/$(basename $(my_installed_module_stem))
+my_extracted_jni_libs :=
+
+ifdef my_embed_jni
+# App explicitly requires the prebuilt NDK stl shared libraies.
+# The NDK stl shared libraries should never go to the system image.
+ifneq ($(filter $(LOCAL_NDK_STL_VARIANT), stlport_shared c++_shared),)
+ifndef LOCAL_SDK_VERSION
+$(error LOCAL_SDK_VERSION must be defined with LOCAL_NDK_STL_VARIANT, \
+    LOCAL_PACKAGE_NAME=$(LOCAL_PACKAGE_NAME))
+endif
+endif
+ifeq (stlport_shared,$(LOCAL_NDK_STL_VARIANT))
+my_jni_shared_libraries += \
+    $(HISTORICAL_NDK_VERSIONS_ROOT)/current/sources/cxx-stl/stlport/libs/$(TARGET_$(my_2nd_arch_prefix)CPU_ABI)/libstlport_shared.so
+else ifeq (c++_shared,$(LOCAL_NDK_STL_VARIANT))
+my_jni_shared_libraries += \
+    $(HISTORICAL_NDK_VERSIONS_ROOT)/current/sources/cxx-stl/llvm-libc++/libs/$(TARGET_$(my_2nd_arch_prefix)CPU_ABI)/libc++_shared.so
+endif
+
+# Set the abi directory used by the local JNI shared libraries.
+# (Doesn't change how the local shared libraries are compiled, just
+# sets where they are stored in the apk.)
+ifeq ($(LOCAL_JNI_SHARED_LIBRARIES_ABI),)
+    my_jni_shared_libraries_abi := $(TARGET_$(my_2nd_arch_prefix)CPU_ABI)
+else
+    my_jni_shared_libraries_abi := $(LOCAL_JNI_SHARED_LIBRARIES_ABI)
+endif
+
+else  # not my_embed_jni
+
+my_jni_shared_libraries := $(strip $(my_jni_shared_libraries))
+ifneq ($(my_jni_shared_libraries),)
+# The jni libaries will be installed to the system.img.
+my_jni_filenames := $(notdir $(my_jni_shared_libraries))
+# Make sure the JNI libraries get installed
+$(LOCAL_INSTALLED_MODULE) : | $(addprefix $($(my_2nd_arch_prefix)TARGET_OUT$(partition_tag)_SHARED_LIBRARIES)/, $(my_jni_filenames))
+
+# Create symlink in the app specific lib path
+ifdef LOCAL_POST_INSTALL_CMD
+# Add a shell command separator
+LOCAL_POST_INSTALL_CMD += ;
+endif
+LOCAL_POST_INSTALL_CMD += \
+  mkdir -p $(my_app_lib_path) \
+  $(foreach lib, $(my_jni_filenames), ;ln -sf ../$(lib) $(my_app_lib_path)/$(lib))
+$(LOCAL_INSTALLED_MODULE): PRIVATE_POST_INSTALL_CMD := $(LOCAL_POST_INSTALL_CMD)
+
+# Clear jni_shared_libraries to not embed it into the apk.
+my_jni_shared_libraries :=
+endif  # $(my_jni_shared_libraries) not empty
+endif  # my_embed_jni
+
+ifdef my_prebuilt_jni_libs
+# Install prebuilt JNI libs to the app specific lib path.
+# Files like @path/to/libfoo.so (path inside the apk) are JNI libs extracted from the prebuilt apk;
+# Files like path/to/libfoo.so (path relative to LOCAL_PATH) are prebuilts in the source tree.
+my_extracted_jni_libs := $(patsubst @%,%, \
+    $(filter @%, $(my_prebuilt_jni_libs)))
+ifdef my_extracted_jni_libs
+ifndef my_prebuilt_src_file
+$(error No prebuilt apk to extract prebuilt jni libraries $(my_extracted_jni_libs))
+endif
+# We use the first jni lib file as dependency.
+my_installed_prebuilt_jni := $(my_app_lib_path)/$(notdir $(firstword $(my_extracted_jni_libs)))
+$(my_installed_prebuilt_jni): PRIVATE_JNI_LIBS := $(my_extracted_jni_libs)
+$(my_installed_prebuilt_jni): $(my_prebuilt_src_file)
+	@echo "Extract JNI libs ($@ <- $<)"
+	@mkdir -p $(dir $@)
+	$(hide) unzip -j -o -d $(dir $@) $< $(PRIVATE_JNI_LIBS) && touch $@
+
+$(LOCAL_INSTALLED_MODULE) : | $(my_installed_prebuilt_jni)
+endif
+
+# prebuilt JNI exsiting as separate source files.
+my_prebuilt_jni_libs := $(addprefix $(LOCAL_PATH)/, \
+    $(filter-out @%, $(my_prebuilt_jni_libs)))
+ifdef my_prebuilt_jni_libs
+$(foreach lib, $(my_prebuilt_jni_libs), \
+    $(eval $(call copy-one-file, $(lib), $(my_app_lib_path)/$(notdir $(lib)))))
+
+$(LOCAL_INSTALLED_MODULE) : | $(addprefix $(my_app_lib_path)/, $(notdir $(my_prebuilt_jni_libs)))
+endif  # inner my_prebuilt_jni_libs
+endif  # outer my_prebuilt_jni_libs
diff --git a/core/package_internal.mk b/core/package_internal.mk
index 5285616..380f7bf 100644
--- a/core/package_internal.mk
+++ b/core/package_internal.mk
@@ -82,8 +82,12 @@
 LOCAL_ASSET_DIR := $(LOCAL_PATH)/assets
 endif
 
+# LOCAL_RESOURCE_DIR may point to resource generated during the build
+need_compile_res :=
 ifeq (,$(LOCAL_RESOURCE_DIR))
   LOCAL_RESOURCE_DIR := $(LOCAL_PATH)/res
+else
+  need_compile_res := true
 endif
 
 package_resource_overlays := $(strip \
@@ -106,6 +110,10 @@
        ) \
      ))
 
+ifneq ($(all_resources),)
+  need_compile_res := true
+endif
+
 all_res_assets := $(strip $(all_assets) $(all_resources))
 
 package_expected_intermediates_COMMON := $(call local-intermediates-dir,COMMON)
@@ -114,7 +122,7 @@
 ifeq (,$(all_assets))
 LOCAL_ASSET_DIR:=
 endif
-ifeq (,$(all_resources))
+ifneq (true,$(need_compile_res))
 LOCAL_RESOURCE_DIR:=
 R_file_stamp :=
 else
@@ -139,9 +147,9 @@
 endif
 proguard_options_file :=
 ifneq ($(LOCAL_PROGUARD_ENABLED),custom)
-ifneq ($(all_resources),)
+ifeq ($(need_compile_res),true)
     proguard_options_file := $(package_expected_intermediates_COMMON)/proguard_options
-endif # all_resources
+endif # need_compile_res
 endif # !custom
 LOCAL_PROGUARD_FLAGS := $(addprefix -include ,$(proguard_options_file)) $(LOCAL_PROGUARD_FLAGS)
 
@@ -196,7 +204,7 @@
     PRIVATE_DEFAULT_APP_TARGET_SDK := $(DEFAULT_APP_TARGET_SDK)
 endif
 
-ifneq ($(all_resources),)
+ifeq ($(need_compile_res),true)
 
 # 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
@@ -265,7 +273,7 @@
 $(full_classes_compiled_jar): $(R_file_stamp)
 endif
 
-endif  # all_resources
+endif  # need_compile_res
 
 ifeq ($(LOCAL_NO_STANDARD_LIBRARIES),true)
 # We need to explicitly clear this var so that we don't
@@ -336,8 +344,10 @@
 
 # Define the rule to build the actual package.
 $(LOCAL_BUILT_MODULE): $(AAPT) | $(ZIPALIGN)
-$(LOCAL_BUILT_MODULE): PRIVATE_JNI_SHARED_LIBRARIES := $(jni_shared_libraries)
-$(LOCAL_BUILT_MODULE): PRIVATE_JNI_SHARED_LIBRARIES_ABI := $(jni_shared_libraries_abi)
+# PRIVATE_JNI_SHARED_LIBRARIES is a list of <abi>:<path_of_built_lib>.
+$(LOCAL_BUILT_MODULE): PRIVATE_JNI_SHARED_LIBRARIES := $(jni_shared_libraries_with_abis)
+# PRIVATE_JNI_SHARED_LIBRARIES_ABI is a list of ABI names.
+$(LOCAL_BUILT_MODULE): PRIVATE_JNI_SHARED_LIBRARIES_ABI := $(jni_shared_libraries_abis)
 ifneq ($(TARGET_BUILD_APPS),)
     # Include all resources for unbundled apps.
     LOCAL_AAPT_INCLUDE_ALL_RESOURCES := true
diff --git a/core/prebuilt_internal.mk b/core/prebuilt_internal.mk
index 4bcd70a..b5e5189 100644
--- a/core/prebuilt_internal.mk
+++ b/core/prebuilt_internal.mk
@@ -165,7 +165,7 @@
 # Sign and align non-presigned .apks.
 $(built_module) : $(my_prebuilt_src_file) | $(ACP) $(ZIPALIGN) $(SIGNAPK_JAR)
 	$(transform-prebuilt-to-target)
-ifdef my_extracted_jni_libs
+ifdef extracted_jni_libs
 	$(hide) zip -d $@ 'lib/*.so'  # strip embedded JNI libraries.
 endif
 ifneq ($(LOCAL_CERTIFICATE),PRESIGNED)
diff --git a/core/product_config.mk b/core/product_config.mk
index f32a596..9468362 100644
--- a/core/product_config.mk
+++ b/core/product_config.mk
@@ -324,6 +324,13 @@
 PRODUCT_AAPT_PREF_CONFIG := \
     $(subst $(space),$(comma),$(strip $(PRODUCT_AAPT_PREF_CONFIG)))
 
+# product-scoped aapt flags
+PRODUCT_AAPT_FLAGS :=
+ifneq ($(filter en_XA ar_XB,$(PRODUCT_LOCALES)),)
+# Force generating resources for pseudo-locales.
+PRODUCT_AAPT_FLAGS += --pseudo-localize
+endif
+
 PRODUCT_BRAND := $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_BRAND))
 
 PRODUCT_MODEL := $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_MODEL))
diff --git a/core/static_java_library.mk b/core/static_java_library.mk
index f95a382..79b7292 100644
--- a/core/static_java_library.mk
+++ b/core/static_java_library.mk
@@ -26,7 +26,10 @@
 # Hack to build static Java library with Android resource
 # See bug 5714516
 all_resources :=
+need_compile_res :=
+# A static Java library needs to explicily set LOCAL_RESOURCE_DIR.
 ifdef LOCAL_RESOURCE_DIR
+need_compile_res := true
 all_resources := $(strip \
     $(foreach dir, $(LOCAL_RESOURCE_DIR), \
       $(addprefix $(dir)/, \
@@ -36,7 +39,6 @@
       ) \
     ))
 
-ifneq (,$(all_resources))
 # By default we should remove the R/Manifest classes from a static Java library,
 # because they will be regenerated in the app that uses it.
 # But if the static Java library will be used by a library, then we may need to
@@ -56,14 +58,13 @@
 endif
 LOCAL_PROGUARD_FLAGS := $(addprefix -include ,$(proguard_options_file)) $(LOCAL_PROGUARD_FLAGS)
 
-endif  # all_resources
 endif  # LOCAL_RESOURCE_DIR
 
 all_res_assets := $(all_resources)
 
 include $(BUILD_SYSTEM)/java_library.mk
 
-ifneq (,$(all_resources))
+ifeq (true,$(need_compile_res))
 R_file_stamp := $(LOCAL_INTERMEDIATE_SOURCE_DIR)/R.stamp
 
 ifeq ($(strip $(LOCAL_MANIFEST_FILE)),)
@@ -124,7 +125,7 @@
 $(full_classes_compiled_jar): $(R_file_stamp)
 endif
 
-endif  # $(all_resources) not empty
+endif  # need_compile_res
 
 # Reset internal variables.
 all_res_assets :=
diff --git a/core/target_test_internal.mk b/core/target_test_internal.mk
index 87503ea..95d4159 100644
--- a/core/target_test_internal.mk
+++ b/core/target_test_internal.mk
@@ -31,5 +31,5 @@
 $(error $(LOCAL_PATH): Do not set LOCAL_MODULE_PATH_64 when building test $(LOCAL_MODULE))
 endif
 
-LOCAL_MODULE_PATH_32 := $(TARGET_OUT_DATA_NATIVE_TESTS)/$(LOCAL_MODULE)
-LOCAL_MODULE_PATH_64 := $(TARGET_OUT_DATA_NATIVE_TESTS)64/$(LOCAL_MODULE)
+LOCAL_MODULE_PATH_64 := $(TARGET_OUT_DATA_NATIVE_TESTS)/$(LOCAL_MODULE)
+LOCAL_MODULE_PATH_32 := $($(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_DATA_NATIVE_TESTS)/$(LOCAL_MODULE)
diff --git a/envsetup.sh b/envsetup.sh
index fcf1b26..6188f26 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -168,9 +168,8 @@
             ;;
     esac
 
-    export ANDROID_QTOOLS=$T/development/emulator/qtools
     export ANDROID_DEV_SCRIPTS=$T/development/scripts:$T/prebuilts/devtools/tools
-    export ANDROID_BUILD_PATHS=$(get_build_var ANDROID_BUILD_PATHS):$ANDROID_QTOOLS:$ANDROID_TOOLCHAIN:$ANDROID_TOOLCHAIN_2ND_ARCH:$ANDROID_KERNEL_TOOLCHAIN_PATH$ANDROID_DEV_SCRIPTS:
+    export ANDROID_BUILD_PATHS=$(get_build_var ANDROID_BUILD_PATHS):$ANDROID_TOOLCHAIN:$ANDROID_TOOLCHAIN_2ND_ARCH:$ANDROID_KERNEL_TOOLCHAIN_PATH$ANDROID_DEV_SCRIPTS:
 
     # If prebuilts/android-emulator/<system>/ exists, prepend it to our PATH
     # to ensure that the corresponding 'emulator' binaries are used.
@@ -1460,8 +1459,8 @@
 fi
 
 # Execute the contents of any vendorsetup.sh files we can find.
-for f in `test -d device && find device -maxdepth 4 -name 'vendorsetup.sh' 2> /dev/null` \
-         `test -d vendor && find vendor -maxdepth 4 -name 'vendorsetup.sh' 2> /dev/null`
+for f in `test -d device && find -L device -maxdepth 4 -name 'vendorsetup.sh' 2> /dev/null` \
+         `test -d vendor && find -L vendor -maxdepth 4 -name 'vendorsetup.sh' 2> /dev/null`
 do
     echo "including $f"
     . $f
diff --git a/target/product/runtime_libart.mk b/target/product/runtime_libart.mk
index de4cf17..6cb8818 100644
--- a/target/product/runtime_libart.mk
+++ b/target/product/runtime_libart.mk
@@ -22,4 +22,10 @@
         dex2oat \
         oatdump
 
+PRODUCT_DEFAULT_PROPERTY_OVERRIDES += \
+    dalvik.vm.image-dex2oat-Xms=64m \
+    dalvik.vm.image-dex2oat-Xmx=64m \
+    dalvik.vm.dex2oat-Xms=64m \
+    dalvik.vm.dex2oat-Xmx=512m \
+
 include $(SRC_TARGET_DIR)/product/runtime_common.mk
diff --git a/tools/adbs b/tools/adbs
index a9bc7c2..a8f06c0 100755
--- a/tools/adbs
+++ b/tools/adbs
@@ -15,206 +15,30 @@
 # limitations under the License.
 
 import os
+import os.path
 import re
 import string
 import sys
 
-###############################################################################
-# match "#00 pc 0003f52e  /system/lib/libdvm.so" for example
-###############################################################################
-trace_line = re.compile("(.*)(\#[0-9]+) {1,2}(..) ([0-9a-f]{8})  ([^\r\n \t]*)")
-
-# returns a list containing the function name and the file/lineno
-def CallAddr2Line(lib, addr):
-  global symbols_dir
-  global addr2line_cmd
-  global cppfilt_cmd
-
-  if lib != "":
-    cmd = addr2line_cmd + \
-        " -f -e " + symbols_dir + lib + " 0x" + addr
-    stream = os.popen(cmd)
-    lines = stream.readlines()
-    list = map(string.strip, lines)
-  else:
-    list = []
-  if list != []:
-    # Name like "move_forward_type<JavaVMOption>" causes troubles
-    mangled_name = re.sub('<', '\<', list[0]);
-    mangled_name = re.sub('>', '\>', mangled_name);
-    cmd = cppfilt_cmd + " " + mangled_name
-    stream = os.popen(cmd)
-    list[0] = stream.readline()
-    stream.close()
-    list = map(string.strip, list)
-  else:
-    list = [ "(unknown)", "(unknown)" ]
-  return list
-
-
-###############################################################################
-# similar to CallAddr2Line, but using objdump to find out the name of the
-# containing function of the specified address
-###############################################################################
-def CallObjdump(lib, addr):
-  global objdump_cmd
-  global symbols_dir
-
-  unknown = "(unknown)"
-  uname = os.uname()[0]
-  if uname == "Darwin":
-    proc = os.uname()[-1]
-    if proc == "i386":
-      uname = "darwin-x86"
-    else:
-      uname = "darwin-ppc"
-  elif uname == "Linux":
-    uname = "linux-x86"
-  if lib != "":
-    next_addr = string.atoi(addr, 16) + 1
-    cmd = objdump_cmd \
-        + " -C -d --start-address=0x" + addr + " --stop-address=" \
-        + str(next_addr) \
-        + " " + symbols_dir + lib
-    stream = os.popen(cmd)
-    lines = stream.readlines()
-    map(string.strip, lines)
-    stream.close()
-  else:
-    return unknown
-
-  # output looks like
-  #
-  # file format elf32-littlearm
-  #
-  # Disassembly of section .text:
-  #
-  # 0000833c <func+0x4>:
-  #        833c:       701a            strb    r2, [r3, #0]
-  #
-  # we want to extract the "func" part
-  num_lines = len(lines)
-  if num_lines < 2:
-    return unknown
-  func_name = lines[num_lines-2]
-  func_regexp = re.compile("(^.*\<)(.*)(\+.*\>:$)")
-  components = func_regexp.match(func_name)
-  if components is None:
-    return unknown
-  return components.group(2)
-
-###############################################################################
-# determine the symbols directory in the local build
-###############################################################################
-def FindSymbolsDir():
-  global symbols_dir
-
-  try:
-    path = os.environ['ANDROID_PRODUCT_OUT'] + "/symbols"
-  except:
-    cmd = "CALLED_FROM_SETUP=true BUILD_SYSTEM=build/core " \
-      + "SRC_TARGET_DIR=build/target make -f build/core/config.mk " \
-      + "dumpvar-abs-TARGET_OUT_UNSTRIPPED"
-    stream = os.popen(cmd)
-    str = stream.read()
-    stream.close()
-    path = str.strip()
-
-  if (not os.path.exists(path)):
-    print path + " not found!"
-    sys.exit(1)
-
-  symbols_dir = path
-
-###############################################################################
-# determine the path of binutils
-###############################################################################
-def SetupToolsPath():
-  global addr2line_cmd
-  global objdump_cmd
-  global cppfilt_cmd
-  global symbols_dir
-
-  uname = os.uname()[0]
-  if uname == "Darwin":
-    uname = "darwin-x86"
-  elif uname == "Linux":
-    uname = "linux-x86"
-  gcc_version = os.environ["TARGET_GCC_VERSION"]
-  prefix = "./prebuilts/gcc/" + uname + "/arm/arm-linux-androideabi-" + \
-           gcc_version + "/bin/"
-  addr2line_cmd = prefix + "arm-linux-androideabi-addr2line"
-
-  if (not os.path.exists(addr2line_cmd)):
-    try:
-      prefix = os.environ['ANDROID_BUILD_TOP'] + "/prebuilts/gcc/" + \
-               uname + "/arm/arm-linux-androideabi-" + gcc_version + "/bin/"
-    except:
-      prefix = "";
-
-    addr2line_cmd = prefix + "arm-linux-androideabi-addr2line"
-    if (not os.path.exists(addr2line_cmd)):
-      print addr2line_cmd + " not found!"
-      sys.exit(1)
-
-  objdump_cmd = prefix + "arm-linux-androideabi-objdump"
-  cppfilt_cmd = prefix + "arm-linux-androideabi-c++filt"
-
-###############################################################################
-# look up the function and file/line number for a raw stack trace line
-# groups[0]: log tag
-# groups[1]: stack level
-# groups[2]: "pc"
-# groups[3]: code address
-# groups[4]: library name
-###############################################################################
-def SymbolTranslation(groups):
-  lib_name = groups[4]
-  code_addr = groups[3]
-  caller = CallObjdump(lib_name, code_addr)
-  func_line_pair = CallAddr2Line(lib_name, code_addr)
-
-  # If a callee is inlined to the caller, objdump will see the caller's
-  # address but addr2line will report the callee's address. So the printed
-  # format is desgined to be "caller<-callee  file:line"
-  if (func_line_pair[0] != caller):
-    print groups[0] + groups[1] + " " + caller + "<-" + \
-          '  '.join(func_line_pair[:]) + " "
-  else:
-    print groups[0] + groups[1] + " " + '  '.join(func_line_pair[:]) + " "
-
-###############################################################################
+sys.path.insert(0, os.path.dirname(__file__) + "/../../development/scripts")
+import stack_core
+import symbol
 
 if __name__ == '__main__':
   # pass the options to adb
   adb_cmd  = "adb " + ' '.join(sys.argv[1:])
 
-  # setup addr2line_cmd and objdump_cmd
-  SetupToolsPath()
-
-  # setup the symbols directory
-  FindSymbolsDir()
+  # create tracer for line parsing
+  tracer = stack_core.TraceConverter()
 
   # invoke the adb command and filter its output
   stream = os.popen(adb_cmd)
   while (True):
     line = stream.readline()
-
-    # EOF reached
     if (line == ''):
       break
-
-    # remove the trailing \n
-    line = line.strip()
-
-    # see if this is a stack trace line
-    match = trace_line.match(line)
-    if (match):
-      groups = match.groups()
-      # translate raw address into symbols
-      SymbolTranslation(groups)
-    else:
-      print line
+    if(tracer.ProcessLine(line) == False):
+      print(line.strip())
       sys.stdout.flush()
 
   # adb itself aborts