diff --git a/CleanSpec.mk b/CleanSpec.mk
index 334b7d8..74e7c43 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -329,6 +329,11 @@
 # instead.
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
 
+# On to MNC
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/app/*)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/APPS/*)
+
 # Adding dalvik.vm.usejit
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/root/default.prop)
@@ -349,12 +354,6 @@
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/root/default.prop)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/recovery/root/default.prop)
 
-# 5.1.1!
-$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
-$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/app/*)
-$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/APPS/*)
-
-
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************
diff --git a/core/Makefile b/core/Makefile
index 9a432da..b119e96 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -464,8 +464,12 @@
 # the boot image, which is a collection of other images.
 INTERNAL_BOOTIMAGE_ARGS := \
 	$(addprefix --second ,$(INSTALLED_2NDBOOTLOADER_TARGET)) \
-	--kernel $(INSTALLED_KERNEL_TARGET) \
-	--ramdisk $(INSTALLED_RAMDISK_TARGET)
+	--kernel $(INSTALLED_KERNEL_TARGET)
+
+ifneq ($(BOARD_BUILD_SYSTEM_ROOT_IMAGE),true)
+INTERNAL_BOOTIMAGE_ARGS += --ramdisk $(INSTALLED_RAMDISK_TARGET)
+endif
+
 
 INTERNAL_BOOTIMAGE_FILES := $(filter-out --%,$(INTERNAL_BOOTIMAGE_ARGS))
 
@@ -488,7 +492,7 @@
 
 ifeq ($(TARGET_BOOTIMAGE_USE_EXT2),true)
 $(error TARGET_BOOTIMAGE_USE_EXT2 is not supported anymore)
-else ifeq (true,$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VERITY)) # TARGET_BOOTIMAGE_USE_EXT2 != true
+else ifeq (true,$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_BOOT_SIGNER)) # TARGET_BOOTIMAGE_USE_EXT2 != true
 
 $(INSTALLED_BOOTIMAGE_TARGET): $(MKBOOTIMG) $(INTERNAL_BOOTIMAGE_FILES) $(BOOT_SIGNER)
 	$(call pretty,"Target boot image: $@")
@@ -503,7 +507,22 @@
 	$(BOOT_SIGNER) /boot $(INSTALLED_BOOTIMAGE_TARGET) $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VERITY_SIGNING_KEY).pk8 $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VERITY_SIGNING_KEY).x509.pem $(INSTALLED_BOOTIMAGE_TARGET)
 	$(hide) $(call assert-max-image-size,$(INSTALLED_BOOTIMAGE_TARGET),$(BOARD_BOOTIMAGE_PARTITION_SIZE))
 
-else # PRODUCT_SUPPORTS_VERITY != true
+else ifeq (true,$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VBOOT)) # PRODUCT_SUPPORTS_BOOT_SIGNER != true
+
+$(INSTALLED_BOOTIMAGE_TARGET): $(MKBOOTIMG) $(INTERNAL_BOOTIMAGE_FILES) $(VBOOT_SIGNER)
+	$(call pretty,"Target boot image: $@")
+	$(hide) $(MKBOOTIMG) $(INTERNAL_BOOTIMAGE_ARGS) $(BOARD_MKBOOTIMG_ARGS) --output $@.unsigned
+	$(VBOOT_SIGNER) $(FUTILITY) $@.unsigned $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VBOOT_SIGNING_KEY).vbpubk $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VBOOT_SIGNING_KEY).vbprivk $@.keyblock $@
+	$(hide) $(call assert-max-image-size,$@,$(BOARD_BOOTIMAGE_PARTITION_SIZE))
+
+.PHONY: bootimage-nodeps
+bootimage-nodeps: $(MKBOOTIMG) $(VBOOT_SIGNER)
+	@echo "make $@: ignoring dependencies"
+	$(hide) $(MKBOOTIMG) $(INTERNAL_BOOTIMAGE_ARGS) $(BOARD_MKBOOTIMG_ARGS) --output $(INSTALLED_BOOTIMAGE_TARGET).unsigned
+	$(VBOOT_SIGNER) $(FUTILITY) $(INSTALLED_BOOTIMAGE_TARGET).unsigned $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VBOOT_SIGNING_KEY).vbpubk $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VBOOT_SIGNING_KEY).vbprivk $(INSTALLED_BOOTIMAGE_TARGET).keyblock $(INSTALLED_BOOTIMAGE_TARGET)
+	$(hide) $(call assert-max-image-size,$(INSTALLED_BOOTIMAGE_TARGET),$(BOARD_BOOTIMAGE_PARTITION_SIZE))
+
+else # PRODUCT_SUPPORTS_VBOOT != true
 
 $(INSTALLED_BOOTIMAGE_TARGET): $(MKBOOTIMG) $(INTERNAL_BOOTIMAGE_FILES)
 	$(call pretty,"Target boot image: $@")
@@ -712,6 +731,7 @@
 $(if $(BOARD_OEMIMAGE_JOURNAL_SIZE),$(hide) echo "oem_journal_size=$(BOARD_OEMIMAGE_JOURNAL_SIZE)" >> $(1))
 $(if $(INTERNAL_USERIMAGES_SPARSE_EXT_FLAG),$(hide) echo "extfs_sparse_flag=$(INTERNAL_USERIMAGES_SPARSE_EXT_FLAG)" >> $(1))
 $(hide) echo "selinux_fc=$(SELINUX_FC)" >> $(1)
+$(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_BOOT_SIGNER),$(hide) echo "boot_signer=$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_BOOT_SIGNER)" >> $(1))
 $(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VERITY),$(hide) echo "verity=$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VERITY)" >> $(1))
 $(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VERITY),$(hide) echo "verity_key=$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VERITY_SIGNING_KEY)" >> $(1))
 $(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VERITY),$(hide) echo "verity_signer_cmd=$(VERITY_SIGNER)" >> $(1))
@@ -854,7 +874,7 @@
   $(if $(filter true,$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VBOOT)), \
     $(hide) $(MKBOOTIMG) $(INTERNAL_RECOVERYIMAGE_ARGS) $(BOARD_MKBOOTIMG_ARGS) --output $(1).unsigned, \
     $(hide) $(MKBOOTIMG) $(INTERNAL_RECOVERYIMAGE_ARGS) $(BOARD_MKBOOTIMG_ARGS) --output $(1))
-  $(if $(filter true,$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VERITY)),\
+  $(if $(filter true,$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_BOOT_SIGNER)),\
     $(BOOT_SIGNER) /recovery $(1) $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VERITY_SIGNING_KEY).pk8 $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VERITY_SIGNING_KEY).x509.pem $(1))
   $(if $(filter true,$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VBOOT)), \
     $(VBOOT_SIGNER) $(FUTILITY) $(1).unsigned $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VBOOT_SIGNING_KEY).vbpubk $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VBOOT_SIGNING_KEY).vbprivk $(1).keyblock $(1))
@@ -1454,7 +1474,7 @@
 	$(hide) echo "use_set_metadata=1" >> $(zip_root)/META/misc_info.txt
 	$(hide) echo "multistage_support=1" >> $(zip_root)/META/misc_info.txt
 	$(hide) echo "update_rename_support=1" >> $(zip_root)/META/misc_info.txt
-	$(hide) echo "blockimgdiff_versions=1,2" >> $(zip_root)/META/misc_info.txt
+	$(hide) echo "blockimgdiff_versions=1,2,3" >> $(zip_root)/META/misc_info.txt
 ifneq ($(OEM_THUMBPRINT_PROPERTIES),)
 	# OTA scripts are only interested in fingerprint related properties
 	$(hide) echo "oem_fingerprint_properties=$(OEM_THUMBPRINT_PROPERTIES)" >> $(zip_root)/META/misc_info.txt
diff --git a/core/base_rules.mk b/core/base_rules.mk
index 99107ab..1a2dc5e 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -381,7 +381,7 @@
 # LOCAL_SOURCE_FILES_ALL_GENERATED is set only if the module does not have static source files,
 # but generated source files in its LOCAL_INTERMEDIATE_SOURCE_DIR.
 # You have to set up the dependency in some other way.
-need_compile_java := $(strip $(all_java_sources)$(all_res_assets))$(LOCAL_STATIC_JAVA_LIBRARIES)$(filter true,$(LOCAL_SOURCE_FILES_ALL_GENERATED))
+need_compile_java := $(strip $(all_java_sources)$(all_res_assets)$(java_resource_sources))$(LOCAL_STATIC_JAVA_LIBRARIES)$(filter true,$(LOCAL_SOURCE_FILES_ALL_GENERATED))
 ifdef need_compile_java
 
 full_static_java_libs := \
@@ -419,10 +419,11 @@
 #                 be up-to-date.
 ifdef LOCAL_IS_HOST_MODULE
 ifeq ($(USE_CORE_LIB_BOOTCLASSPATH),true)
-$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH := -bootclasspath $(call java-lib-deps,core-libart-hostdex,$(LOCAL_IS_HOST_MODULE))
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH := -bootclasspath $(call java-lib-files,core-libart-hostdex,$(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))
+full_java_lib_deps := $(call java-lib-deps,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE)) \
+    $(full_shared_java_libs)
 else
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH :=
 
@@ -681,6 +682,86 @@
 endif
 
 ###########################################################
+# JACK
+###########################################################
+ifdef LOCAL_JACK_ENABLED
+ifdef need_compile_java
+
+full_static_jack_libs := \
+    $(foreach lib,$(LOCAL_STATIC_JAVA_LIBRARIES), \
+      $(call intermediates-dir-for, \
+        JAVA_LIBRARIES,$(lib),$(LOCAL_IS_HOST_MODULE),COMMON)/classes.jack)
+
+ifeq ($(my_prefix),TARGET_)
+ifeq ($(LOCAL_SDK_VERSION),)
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH_JAVA_LIBRARIES := $(call jack-lib-files,core-libart)
+else
+ifeq ($(LOCAL_SDK_VERSION)$(TARGET_BUILD_APPS),current)
+# LOCAL_SDK_VERSION is current and no TARGET_BUILD_APPS.
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH_JAVA_LIBRARIES := $(call jack-lib-files,android_stubs_current)
+else ifeq ($(LOCAL_SDK_VERSION)$(TARGET_BUILD_APPS),system_current)
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH_JAVA_LIBRARIES := $(call jack-lib-files,android_system_stubs_current)
+else
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH_JAVA_LIBRARIES := $(call jack-lib-files,sdk_v$(LOCAL_SDK_VERSION))
+endif # current or system_current
+endif # LOCAL_SDK_VERSION
+endif # TARGET_
+
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_STATIC_JACK_LIBRARIES := $(full_static_jack_libs)
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_VM_ARGS := $(LOCAL_JACK_VM_ARGS)
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_EXTRA_ARGS := $(LOCAL_JACK_EXTRA_ARGS)
+
+ifdef LOCAL_IS_HOST_MODULE
+ifeq ($(USE_CORE_LIB_BOOTCLASSPATH),true)
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH_JAVA_LIBRARIES := $(call jack-lib-files,core-libart-hostdex,$(LOCAL_IS_HOST_MODULE))
+full_shared_jack_libs := $(call jack-lib-files,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE))
+full_jack_lib_deps := $(call jack-lib-deps,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE))
+else
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH_JAVA_LIBRARIES :=
+full_shared_jack_libs := $(call jack-lib-deps,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE))
+full_jack_lib_deps := $(full_shared_jack_libs)
+endif # USE_CORE_LIB_BOOTCLASSPATH
+else # !LOCAL_IS_HOST_MODULE
+full_shared_jack_libs := $(call jack-lib-files,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE))
+full_jack_lib_deps := $(call jack-lib-deps,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE))
+endif # !LOCAL_IS_HOST_MODULE
+full_jack_libs := $(full_shared_jack_libs) $(full_static_jack_libs) $(LOCAL_JACK_CLASSPATH)
+full_jack_lib_deps += $(full_static_jack_libs) $(LOCAL_JACK_CLASSPATH)
+
+# This is set by packages that are linking to other packages that export
+# shared libraries, allowing them to make use of the code in the linked apk.
+ifneq ($(apk_libraries),)
+  link_apk_jack_libraries := \
+      $(foreach lib,$(apk_libraries), \
+        $(call intermediates-dir-for, \
+              APPS,$(lib),,COMMON)/classes.jack)
+
+  # link against the jar with full original names (before proguard processing).
+  full_shared_jack_libs += $(link_apk_jack_libraries)
+  full_jack_libs += $(link_apk_jack_libraries)
+  full_jack_lib_deps += $(link_apk_jack_libraries)
+endif
+
+# This is set by packages that contain instrumentation, allowing them to
+# link against the package they are instrumenting.  Currently only one such
+# package is allowed.
+ifdef LOCAL_INSTRUMENTATION_FOR
+
+   # link against the jar with full original names (before proguard processing).
+   link_instr_classes_jack := $(link_instr_intermediates_dir.COMMON)/classes.noshrob.jack
+   full_jack_libs += $(link_instr_classes_jack)
+   full_jack_lib_deps += $(link_instr_classes_jack)
+endif
+
+endif  # need_compile_java
+
+# Propagate local configuration options to this target.
+$(LOCAL_INTERMEDIATE_TARGETS) : PRIVATE_ALL_JACK_LIBRARIES:= $(full_jack_libs)
+$(LOCAL_INTERMEDIATE_TARGETS) : PRIVATE_JARJAR_RULES := $(LOCAL_JARJAR_RULES)
+
+endif # LOCAL_JACK_ENABLED
+
+###########################################################
 ## NOTICE files
 ###########################################################
 
diff --git a/core/binary.mk b/core/binary.mk
index d3d050e..d7b2c6e 100644
--- a/core/binary.mk
+++ b/core/binary.mk
@@ -49,6 +49,7 @@
 my_generated_sources := $(LOCAL_GENERATED_SOURCES)
 my_native_coverage := $(LOCAL_NATIVE_COVERAGE)
 my_additional_dependencies := $(LOCAL_MODULE_MAKEFILE) $(LOCAL_ADDITIONAL_DEPENDENCIES)
+my_export_c_include_dirs := $(LOCAL_EXPORT_C_INCLUDE_DIRS)
 
 ifdef LOCAL_IS_HOST_MODULE
 my_allow_undefined_symbols := true
@@ -387,7 +388,7 @@
 ## Define arm-vs-thumb-mode flags.
 ###########################################################
 LOCAL_ARM_MODE := $(strip $(LOCAL_ARM_MODE))
-ifeq ($(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH),arm)
+ifeq ($($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH),arm)
 arm_objects_mode := $(if $(LOCAL_ARM_MODE),$(LOCAL_ARM_MODE),arm)
 normal_objects_mode := $(if $(LOCAL_ARM_MODE),$(LOCAL_ARM_MODE),thumb)
 
@@ -477,6 +478,7 @@
 # This is just a dummy rule to make sure gmake doesn't skip updating the dependents.
 $(rs_generated_cpps) : $(RenderScript_file_stamp)
 	@echo "Updated RS generated cpp file $@."
+	$(hide) touch $@
 
 my_c_includes += $(renderscript_intermediate)
 my_generated_sources += $(rs_generated_cpps)
@@ -500,48 +502,69 @@
 ALL_GENERATED_SOURCES += $(my_generated_sources)
 
 ###########################################################
-## Compile the .proto files to .cc and then to .o
+## Compile the .proto files to .cc (or .c) and then to .o
 ###########################################################
 proto_sources := $(filter %.proto,$(my_src_files))
 proto_generated_objects :=
 proto_generated_headers :=
 ifneq ($(proto_sources),)
-proto_sources_fullpath := $(addprefix $(LOCAL_PATH)/, $(proto_sources))
-proto_generated_cc_sources_dir := $(generated_sources_dir)/proto
-proto_generated_cc_sources := $(addprefix $(proto_generated_cc_sources_dir)/, \
-    $(patsubst %.proto,%.pb.cc,$(proto_sources_fullpath)))
-proto_generated_headers := $(patsubst %.pb.cc,%.pb.h, $(proto_generated_cc_sources))
+proto_generated_sources_dir := $(generated_sources_dir)/proto
 proto_generated_obj_dir := $(intermediates)/proto
+
+ifneq (,$(filter nanopb-c nanopb-c-enable_malloc, $(LOCAL_PROTOC_OPTIMIZE_TYPE)))
+my_proto_source_suffix := .c
+my_proto_c_includes := external/nanopb-c
+my_protoc_flags := --nanopb_out=$(proto_generated_sources_dir) \
+    --plugin=external/nanopb-c/generator/protoc-gen-nanopb
+else
+my_proto_source_suffix := .cc
+my_proto_c_includes := external/protobuf/src
+my_cflags += -DGOOGLE_PROTOBUF_NO_RTTI
+my_protoc_flags := --cpp_out=$(proto_generated_sources_dir)
+endif
+my_proto_c_includes += $(proto_generated_sources_dir)
+
+proto_sources_fullpath := $(addprefix $(LOCAL_PATH)/, $(proto_sources))
+proto_generated_sources := $(addprefix $(proto_generated_sources_dir)/, \
+    $(patsubst %.proto,%.pb$(my_proto_source_suffix),$(proto_sources_fullpath)))
+proto_generated_headers := $(patsubst %.pb$(my_proto_source_suffix),%.pb.h, $(proto_generated_sources))
 proto_generated_objects := $(addprefix $(proto_generated_obj_dir)/, \
     $(patsubst %.proto,%.pb.o,$(proto_sources_fullpath)))
 
-# Auto-export the generated proto source dir.
-LOCAL_EXPORT_C_INCLUDE_DIRS += $(proto_generated_cc_sources_dir)
-
 # Ensure the transform-proto-to-cc rule is only defined once in multilib build.
 ifndef $(my_prefix)_$(LOCAL_MODULE_CLASS)_$(LOCAL_MODULE)_proto_defined
-$(proto_generated_cc_sources): PRIVATE_PROTO_INCLUDES := $(TOP)
-$(proto_generated_cc_sources): PRIVATE_PROTO_CC_OUTPUT_DIR := $(proto_generated_cc_sources_dir)
-$(proto_generated_cc_sources): PRIVATE_PROTOC_FLAGS := $(LOCAL_PROTOC_FLAGS)
-$(proto_generated_cc_sources): $(proto_generated_cc_sources_dir)/%.pb.cc: %.proto $(PROTOC)
+$(proto_generated_sources): PRIVATE_PROTO_INCLUDES := $(TOP)
+$(proto_generated_sources): PRIVATE_PROTOC_FLAGS := $(LOCAL_PROTOC_FLAGS) $(my_protoc_flags)
+$(proto_generated_sources): $(proto_generated_sources_dir)/%.pb$(my_proto_source_suffix): %.proto $(PROTOC)
 	$(transform-proto-to-cc)
 
 # This is just a dummy rule to make sure gmake doesn't skip updating the dependents.
-$(proto_generated_headers): $(proto_generated_cc_sources_dir)/%.pb.h: $(proto_generated_cc_sources_dir)/%.pb.cc
+$(proto_generated_headers): $(proto_generated_sources_dir)/%.pb.h: $(proto_generated_sources_dir)/%.pb$(my_proto_source_suffix)
 	@echo "Updated header file $@."
+	$(hide) touch $@
 
 $(my_prefix)_$(LOCAL_MODULE_CLASS)_$(LOCAL_MODULE)_proto_defined := true
 endif  # transform-proto-to-cc rule included only once
 
 $(proto_generated_objects): PRIVATE_ARM_MODE := $(normal_objects_mode)
 $(proto_generated_objects): PRIVATE_ARM_CFLAGS := $(normal_objects_cflags)
-$(proto_generated_objects): $(proto_generated_obj_dir)/%.o: $(proto_generated_cc_sources_dir)/%.cc $(proto_generated_headers)
+$(proto_generated_objects): $(proto_generated_obj_dir)/%.o: $(proto_generated_sources_dir)/%$(my_proto_source_suffix) $(proto_generated_headers)
+ifeq ($(my_proto_source_suffix),.c)
+	$(transform-$(PRIVATE_HOST)c-to-o)
+else
 	$(transform-$(PRIVATE_HOST)cpp-to-o)
+endif
 -include $(proto_generated_objects:%.o=%.P)
 
-my_c_includes += external/protobuf/src $(proto_generated_cc_sources_dir)
-my_cflags += -DGOOGLE_PROTOBUF_NO_RTTI
-ifeq ($(LOCAL_PROTOC_OPTIMIZE_TYPE),full)
+my_c_includes += $(my_proto_c_includes)
+# Auto-export the generated proto source dir.
+my_export_c_include_dirs += $(my_proto_c_includes)
+
+ifeq ($(LOCAL_PROTOC_OPTIMIZE_TYPE),nanopb-c-enable_malloc)
+    my_static_libraries += libprotobuf-c-nano-enable_malloc
+else ifeq ($(LOCAL_PROTOC_OPTIMIZE_TYPE),nanopb-c)
+    my_static_libraries += libprotobuf-c-nano
+else ifeq ($(LOCAL_PROTOC_OPTIMIZE_TYPE),full)
     ifdef LOCAL_SDK_VERSION
         my_static_libraries += libprotobuf-cpp-full
     else
@@ -556,7 +579,6 @@
 endif
 endif  # $(proto_sources) non-empty
 
-
 ###########################################################
 ## YACC: Compile .y and .yy files to .cpp and the to .o.
 ###########################################################
@@ -1088,12 +1110,12 @@
 # Export includes
 ###########################################################
 export_includes := $(intermediates)/export_includes
-$(export_includes): PRIVATE_EXPORT_C_INCLUDE_DIRS := $(LOCAL_EXPORT_C_INCLUDE_DIRS)
+$(export_includes): PRIVATE_EXPORT_C_INCLUDE_DIRS := $(my_export_c_include_dirs)
 # Make sure .pb.h are already generated before any dependent source files get compiled.
 $(export_includes) : $(LOCAL_MODULE_MAKEFILE) $(proto_generated_headers)
 	@echo Export includes file: $< -- $@
 	$(hide) mkdir -p $(dir $@) && rm -f $@
-ifdef LOCAL_EXPORT_C_INCLUDE_DIRS
+ifdef my_export_c_include_dirs
 	$(hide) for d in $(PRIVATE_EXPORT_C_INCLUDE_DIRS); do \
 	        echo "-I $$d" >> $@; \
 	        done
diff --git a/core/build_id.mk b/core/build_id.mk
index f94b224..0e8e2cf 100644
--- a/core/build_id.mk
+++ b/core/build_id.mk
@@ -18,6 +18,4 @@
 # (like "CRB01").  It must be a single word, and is
 # capitalized by convention.
 
-BUILD_ID := AOSP
-
-DISPLAY_BUILD_NUMBER := true
+export BUILD_ID=MASTER
diff --git a/core/clang/config.mk b/core/clang/config.mk
index 24c06b6..6da90ec 100644
--- a/core/clang/config.mk
+++ b/core/clang/config.mk
@@ -68,10 +68,15 @@
   -finline-functions \
   -finline-limit=64 \
   -fno-canonical-system-headers \
+  -Wno-clobbered \
+  -fno-devirtualize \
   -fno-tree-sra \
   -fprefetch-loop-arrays \
   -funswitch-loops \
+  -Werror=unused-but-set-parameter \
+  -Werror=unused-but-set-variable \
   -Wmaybe-uninitialized \
+  -Wno-error=clobbered \
   -Wno-error=maybe-uninitialized \
   -Wno-error=unused-but-set-parameter \
   -Wno-error=unused-but-set-variable \
diff --git a/core/cleanbuild.mk b/core/cleanbuild.mk
index cf980d8..801a292 100644
--- a/core/cleanbuild.mk
+++ b/core/cleanbuild.mk
@@ -247,3 +247,63 @@
   $(info *** Done with the cleaning, now starting the real build.)
 endif
 force_installclean :=
+
+###########################################################
+# Clean build tools when swithcing between prebuilt host tools (such as in
+# apps_only build) and tools built from source (platform build).
+previous_prebuilt_tools_config_file := $(HOST_OUT)/previous_prebuilt_tools_config.mk
+ifneq (,$(TARGET_BUILD_APPS)$(filter true,$(TARGET_BUILD_PDK)))
+current_prebuilt_tools := true
+else
+current_prebuilt_tools := false
+endif
+PREVIOUS_PREBUILT_TOOLS :=
+-include $(previous_prebuilt_tools_config_file)
+force_tools_clean :=
+ifdef PREVIOUS_PREBUILT_TOOLS
+ifneq ($(PREVIOUS_PREBUILT_TOOLS),$(current_prebuilt_tools))
+force_tools_clean := true
+endif
+endif # else, this is the first build, so no need to clean.
+
+# Write the new state to the file.
+$(shell \
+  mkdir -p $(dir $(previous_prebuilt_tools_config_file)) && \
+  echo "PREVIOUS_PREBUILT_TOOLS:=$(current_prebuilt_tools)" > \
+    $(previous_prebuilt_tools_config_file))
+
+ifeq ($(force_tools_clean),true)
+# For this list of prebuilt tools, see prebuilts/sdk/tools/Android.mk.
+tools_clean_files := \
+  $(HOST_OUT_COMMON_INTERMEDIATES)/JAVA_LIBRARIES/signapk_intermediates \
+  $(HOST_OUT_COMMON_INTERMEDIATES)/JAVA_LIBRARIES/dx_intermediates \
+  $(HOST_OUT_COMMON_INTERMEDIATES)/JAVA_LIBRARIES/shrinkedAndroid_intermediates \
+  $(HOST_OUT)/obj*/EXECUTABLES/aapt_intermediates \
+  $(HOST_OUT)/obj*/EXECUTABLES/aidl_intermediates \
+  $(HOST_OUT)/obj*/EXECUTABLES/zipalign_intermediates \
+  $(HOST_OUT)/obj*/lib/libc++$(HOST_SHLIB_SUFFIX) \
+
+$(info *** build type changed, clean host tools...)
+$(info *** rm -rf $(tools_clean_files))
+$(shell rm -rf $(tools_clean_files))
+endif
+
+###########################################################
+
+.PHONY: clean-jack-files
+clean-jack-files: clean-dex-files
+	$(hide) find $(OUT_DIR) -name "*.jack" | xargs rm -f
+	$(hide) find $(OUT_DIR) -type d -name "jack" | xargs rm -rf
+	@echo "All jack files have been removed."
+
+.PHONY: clean-dex-files
+clean-dex-files:
+	$(hide) find $(OUT_DIR) -name "*.dex" ! -path "*/jack-incremental/*" | xargs rm -f
+	$(hide) for i in `find $(OUT_DIR) -name "*.jar" -o -name "*.apk"` ; do ((unzip -l $$i 2> /dev/null | \
+				grep -q "\.dex$$" && rm -f $$i) || continue ) ; done
+	@echo "All dex files and archives containing dex files have been removed."
+
+.PHONY: clean-jack-incremental
+clean-jack-incremental:
+	$(hide) find $(OUT_DIR) -name "jack-incremental" -type d | xargs rm -rf
+	@echo "All jack incremental dirs have been removed."
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 4f5ac28..eb133dc 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -74,6 +74,7 @@
 LOCAL_JAVA_LAYERS_FILE:=
 LOCAL_NO_STANDARD_LIBRARIES:=
 LOCAL_CLASSPATH:=
+LOCAL_JACK_CLASSPATH:=
 LOCAL_DROIDDOC_USE_STANDARD_DOCLET:=
 LOCAL_DROIDDOC_SOURCE_PATH:=
 LOCAL_DROIDDOC_TEMPLATE_DIR:=
@@ -107,6 +108,11 @@
 LOCAL_ADDITIONAL_JAVA_DIR:=
 LOCAL_ALLOW_UNDEFINED_SYMBOLS:=
 LOCAL_DX_FLAGS:=
+LOCAL_JACK_ENABLED:=$(DEFAULT_JACK_ENABLED) # '' (ie disabled), disabled, full, incremental
+LOCAL_JACK_VM_ARGS := $(DEFAULT_JACK_VM_ARGS)
+LOCAL_JACK_EXTRA_ARGS := $(DEFAULT_JACK_EXTRA_ARGS)
+LOCAL_JACK_FLAGS:=
+LOCAL_JILL_FLAGS:=
 LOCAL_CERTIFICATE:=
 LOCAL_SDK_VERSION:=
 LOCAL_SDK_RES_VERSION:=
@@ -114,6 +120,7 @@
 LOCAL_EMMA_INSTRUMENT:=
 LOCAL_PROGUARD_ENABLED:= # '',full,custom,nosystem,disabled,obfuscation,optimization
 LOCAL_PROGUARD_FLAGS:=
+LOCAL_JACK_PROGUARD_FLAGS:=
 LOCAL_PROGUARD_FLAG_FILES:=
 LOCAL_TEST_MODULE_TO_PROGUARD_WITH:=
 LOCAL_EMMA_COVERAGE_FILTER:=
@@ -131,7 +138,7 @@
 LOCAL_DEX_PREOPT:= # '',true,false,nostripping
 LOCAL_DEX_PREOPT_IMAGE_LOCATION:=
 LOCAL_DEX_PREOPT_FLAGS:=
-LOCAL_PROTOC_OPTIMIZE_TYPE:= # lite(default),micro,nano,full
+LOCAL_PROTOC_OPTIMIZE_TYPE:= # lite(default),micro,nano,full,nanopb-c,nanopb-c-enable_malloc
 LOCAL_PROTOC_FLAGS:=
 LOCAL_PROTO_JAVA_OUTPUT_PARAMS:=
 LOCAL_NO_CRT:=
diff --git a/core/combo/TARGET_linux-x86.mk b/core/combo/TARGET_linux-x86.mk
index ed78372..958885c 100644
--- a/core/combo/TARGET_linux-x86.mk
+++ b/core/combo/TARGET_linux-x86.mk
@@ -23,10 +23,10 @@
 endif
 
 # Decouple NDK library selection with platform compiler version
-$(combo_2nd_arch_prefix)TARGET_NDK_GCC_VERSION := 4.8
+$(combo_2nd_arch_prefix)TARGET_NDK_GCC_VERSION := 4.9
 
 ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),)
-$(combo_2nd_arch_prefix)TARGET_GCC_VERSION := 4.8
+$(combo_2nd_arch_prefix)TARGET_GCC_VERSION := 4.9
 else
 $(combo_2nd_arch_prefix)TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
 endif
@@ -97,6 +97,10 @@
 			-include $(android_config_h) \
 			-I $(dir $(android_config_h))
 
+# Work around gcc 4.9 devirtualization bug, https://b.corp.google.com/19872411.
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += \
+			-fno-devirtualize \
+
 $(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += $(arch_variant_cflags)
 
 ifeq ($(ARCH_X86_HAVE_SSSE3),true)   # yes, really SSSE3, not SSE3!
diff --git a/core/combo/TARGET_linux-x86_64.mk b/core/combo/TARGET_linux-x86_64.mk
index 0b2905c..adc690a 100644
--- a/core/combo/TARGET_linux-x86_64.mk
+++ b/core/combo/TARGET_linux-x86_64.mk
@@ -26,7 +26,7 @@
 TARGET_NDK_GCC_VERSION := 4.9
 
 ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),)
-TARGET_GCC_VERSION := 4.8
+TARGET_GCC_VERSION := 4.9
 else
 TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
 endif
@@ -93,6 +93,10 @@
 			-no-canonical-prefixes \
 			-fno-canonical-system-headers
 
+# Work around gcc 4.9 devirtualization bug, https://b.corp.google.com/19872411.
+TARGET_GLOBAL_CFLAGS += \
+			-fno-devirtualize \
+
 # Help catch common 32/64-bit errors.
 TARGET_GLOBAL_CFLAGS += \
     -Werror=pointer-to-int-cast \
diff --git a/core/combo/javac.mk b/core/combo/javac.mk
index fb43ea4..82cbb43 100644
--- a/core/combo/javac.mk
+++ b/core/combo/javac.mk
@@ -9,6 +9,11 @@
 #   COMMON_JAVAC -- Java compiler command with common arguments
 #
 
+ifndef ANDROID_COMPILE_WITH_JACK
+# Defines if compilation with jack is enabled by default.
+ANDROID_COMPILE_WITH_JACK := true
+endif
+
 common_jdk_flags := -source 1.7 -target 1.7 -Xmaxerrs 9999999
 
 # Use the indexer wrapper to index the codebase instead of the javac compiler
diff --git a/core/config.mk b/core/config.mk
index 83295d9..5ad79e3 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -38,6 +38,7 @@
 # TODO: See if we can remove most of these from the global list.
 SRC_HEADERS := \
 	$(TOPDIR)system/core/include \
+	$(TOPDIR)system/media/audio/include \
 	$(TOPDIR)hardware/libhardware/include \
 	$(TOPDIR)hardware/libhardware_legacy/include \
 	$(TOPDIR)hardware/ril/include \
@@ -131,6 +132,12 @@
 # list of flags to turn specific warnings in to errors
 TARGET_ERROR_FLAGS := -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point
 
+ifdef TMPDIR
+JAVA_TMPDIR_ARG := -Djava.io.tmpdir=$(TMPDIR)
+else
+JAVA_TMPDIR_ARG :=
+endif
+
 # ###############################################################
 # Include sub-configuration files
 # ###############################################################
@@ -365,6 +372,11 @@
 
 # ---------------------------------------------------------------
 # Generic tools.
+JACK := $(HOST_OUT_EXECUTABLES)/jack
+JACK_JAR := $(HOST_OUT_JAVA_LIBRARIES)/jack.jar
+JACK_LAUNCHER_JAR := $(HOST_OUT_JAVA_LIBRARIES)/jack-launcher.jar
+JILL_JAR := $(HOST_OUT_JAVA_LIBRARIES)/jill.jar
+JACK_MULTIDEX_DEFAULT_PREPROCESSOR := frameworks/multidex/library/resources/JACK-INF/legacyMultidexInstallation.jpp
 
 LEX := prebuilts/misc/$(BUILD_OS)-$(HOST_PREBUILT_ARCH)/flex/flex-2.5.39
 # The default PKGDATADIR built in the prebuilt bison is a relative path
@@ -408,6 +420,42 @@
 TUNE2FS := $(HOST_OUT_EXECUTABLES)/tune2fs$(HOST_EXECUTABLE_SUFFIX)
 E2FSCK := $(HOST_OUT_EXECUTABLES)/e2fsck$(HOST_EXECUTABLE_SUFFIX)
 JARJAR := $(HOST_OUT_JAVA_LIBRARIES)/jarjar.jar
+
+ifeq ($(ANDROID_COMPILE_WITH_JACK),true)
+DEFAULT_JACK_ENABLED:=full
+else
+DEFAULT_JACK_ENABLED:=
+endif
+ifneq ($(strip $(ANDROID_JACK_VM)),)
+JACK_VM := $(ANDROID_JACK_VM)
+else
+JACK_VM := java
+endif
+# call jack
+#
+# $(1): vm arguments
+# $(2): jack perf arguments
+ifneq (,$(strip $(filter dist,$(MAKECMDGOALS))))
+JACK_SERVER_LOG_COMMAND := mkdir -p $(DIST_DIR)/logs/; SERVER_LOG=$(DIST_DIR)/logs/jack-server.log
+endif
+define call-jack
+$(JACK_SERVER_LOG_COMMAND) JACK_VM_COMMAND="$(JACK_VM) $(1) $(JAVA_TMPDIR_ARG) -jar $(JACK_LAUNCHER_JAR) " JACK_JAR="$(JACK_JAR)" $(JACK) $(2)
+endef
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_VM_ARGS := $(DEFAULT_JACK_VM_ARGS)
+ifneq ($(ANDROID_JACK_VM_ARGS),)
+DEFAULT_JACK_VM_ARGS := $(ANDROID_JACK_VM_ARGS)
+else
+DEFAULT_JACK_VM_ARGS := -Dfile.encoding=UTF-8 -Xms2560m -XX:+TieredCompilation
+endif
+ifneq ($(ANDROID_JACK_EXTRA_ARGS),)
+DEFAULT_JACK_EXTRA_ARGS := $(ANDROID_JACK_EXTRA_ARGS)
+else
+DEFAULT_JACK_EXTRA_ARGS := -D sched.runner=multi-threaded -D  sched.runner.thread.kind=fixed -D sched.runner.thread.fixed.count=4 --sanity-checks off -D jack.reporter.level.file=error=--,warning=-
+endif
+# Turn off jack warnings by default.
+DEFAULT_JACK_EXTRA_ARGS += --verbose error
+
+JILL := java -Xmx3500m -jar $(JILL_JAR)
 PROGUARD := external/proguard/bin/proguard.sh
 JAVATAGS := build/tools/java-event-log-tags.py
 LLVM_RS_CC := $(HOST_OUT_EXECUTABLES)/llvm-rs-cc$(HOST_EXECUTABLE_SUFFIX)
@@ -418,6 +466,8 @@
 VERITY_SIGNER := $(HOST_OUT_EXECUTABLES)/verity_signer
 BUILD_VERITY_TREE := $(HOST_OUT_EXECUTABLES)/build_verity_tree
 BOOT_SIGNER := $(HOST_OUT_EXECUTABLES)/boot_signer
+FUTILITY := prebuilts/misc/$(BUILD_OS)-$(HOST_PREBUILT_ARCH)/futility/futility
+VBOOT_SIGNER := prebuilts/misc/scripts/vboot_signer/vboot_signer.sh
 
 # ACP is always for the build OS, not for the host OS
 ACP := $(BUILD_OUT_EXECUTABLES)/acp$(BUILD_EXECUTABLE_SUFFIX)
diff --git a/core/configure_local_jack.mk b/core/configure_local_jack.mk
new file mode 100644
index 0000000..98b13d2
--- /dev/null
+++ b/core/configure_local_jack.mk
@@ -0,0 +1,30 @@
+#
+# 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.
+#
+
+ifdef ANDROID_FORCE_JACK_ENABLED
+LOCAL_JACK_ENABLED := $(ANDROID_FORCE_JACK_ENABLED)
+endif
+LOCAL_JACK_ENABLED := $(strip $(LOCAL_JACK_ENABLED))
+ifneq ($(LOCAL_JACK_ENABLED),full)
+ifneq ($(LOCAL_JACK_ENABLED),incremental)
+ifdef LOCAL_JACK_ENABLED
+ifneq ($(LOCAL_JACK_ENABLED),disabled)
+$(error $(LOCAL_PATH): invalid LOCAL_JACK_ENABLED "$(LOCAL_JACK_ENABLED)" for $(LOCAL_MODULE))
+endif
+endif
+LOCAL_JACK_ENABLED :=
+endif
+endif
diff --git a/core/definitions.mk b/core/definitions.mk
index b6e5277..fc18ee3 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -403,6 +403,14 @@
 endef
 
 ###########################################################
+## Reverse order of a list
+###########################################################
+
+define reverse-list
+$(if $(1),$(call reverse-list,$(wordlist 2,$(words $(1)),$(1)))) $(firstword $(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
@@ -602,6 +610,36 @@
 endef
 
 ###########################################################
+## Convert "core ext framework" to "out/.../classes.jack ..."
+## $(1): library list
+## $(2): Non-empty if IS_HOST_MODULE
+###########################################################
+
+# $(1): library name
+# $(2): Non-empty if IS_HOST_MODULE
+define _jack-lib-full-classes
+$(call _java-lib-dir,$(1),$(2))/classes.jack
+endef
+
+# $(1): library name list
+# $(2): Non-empty if IS_HOST_MODULE
+define jack-lib-files
+$(foreach lib,$(1),$(call _jack-lib-full-classes,$(lib),$(2)))
+endef
+
+# $(1): library name
+# $(2): Non-empty if IS_HOST_MODULE
+define _jack-lib-full-dep
+$(call _jack-lib-full-classes,$(1),$(2))
+endef
+
+# $(1): library name list
+# $(2): Non-empty if IS_HOST_MODULE
+define jack-lib-deps
+$(foreach lib,$(1),$(call _jack-lib-full-dep,$(lib),$(2)))
+endef
+
+###########################################################
 ## Run rot13 on a string
 ## $(1): the string.  Must be one line.
 ###########################################################
@@ -957,7 +995,7 @@
 endef
 
 ######################################################################
-## Commands for running protoc to compile .proto into .pb.cc and .pb.h
+## Commands for running protoc to compile .proto into .pb.cc (or.pb.c) and .pb.h
 ######################################################################
 define transform-proto-to-cc
 @mkdir -p $(dir $@)
@@ -965,10 +1003,9 @@
 $(hide) $(PROTOC) \
 	$(addprefix --proto_path=, $(PRIVATE_PROTO_INCLUDES)) \
 	$(PRIVATE_PROTOC_FLAGS) \
-	--cpp_out=$(PRIVATE_PROTO_CC_OUTPUT_DIR) $<
+	$<
 endef
 
-
 ###########################################################
 ## Commands for running gcc to compile a C++ file
 ###########################################################
@@ -1759,6 +1796,146 @@
 $(call compile-java,$(TARGET_JAVAC),$(PRIVATE_BOOTCLASSPATH))
 endef
 
+# Invoke Jack to compile java from source to dex and jack files.
+#
+# Some historical notes:
+# - below we write the list of java files to java-source-list to avoid argument
+#   list length problems with Cygwin
+# - we filter out duplicate java file names because Jack doesn't like them.
+# TODO (yroussel) PRIVATE_RMTYPEDEFS
+define jack-java-to-dex
+$(hide) rm -f $@
+$(hide) rm -f $(PRIVATE_CLASSES_JACK)
+$(hide) rm -rf $(PRIVATE_JACK_INTERMEDIATES_DIR)
+$(hide) mkdir -p $(dir $@)
+$(hide) mkdir -p $(dir $(PRIVATE_CLASSES_JACK))
+$(hide) mkdir -p $(PRIVATE_JACK_INTERMEDIATES_DIR)
+$(if $(PRIVATE_JACK_INCREMENTAL_DIR),$(hide) mkdir -p $(PRIVATE_JACK_INCREMENTAL_DIR))
+$(call dump-words-to-file,$(PRIVATE_JAVA_SOURCES),$(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list)
+$(hide) if [ -d "$(PRIVATE_SOURCE_INTERMEDIATES_DIR)" ]; then \
+          find $(PRIVATE_SOURCE_INTERMEDIATES_DIR) -name '*.java' >> $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list; \
+fi
+$(hide) tr ' ' '\n' < $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list \
+    | sort -u > $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list-uniq
+$(if $(PRIVATE_JACK_PROGUARD_FLAGS), \
+    $(hide) echo -basedirectory $(CURDIR) > $@.flags; \
+    echo $(PRIVATE_JACK_PROGUARD_FLAGS) >> $@.flags; \
+)
+$(if $(PRIVATE_EXTRA_JAR_ARGS),
+    $(hide) mkdir -p $@.res.tmp
+    $(hide) $(call create-empty-package-at,$@.res.tmp.zip)
+    $(hide) $(call add-java-resources-to,$@.res.tmp.zip)
+    $(hide) $(call unzip-jar-files,$@.res.tmp.zip,$@.res.tmp)
+    $(hide) rm $@.res.tmp.zip)
+$(hide) if [ -s $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list-uniq ] ; then \
+    export tmpEcjArg="@$(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list-uniq"; \
+else \
+    export tmpEcjArg=""; \
+fi; \
+$(call call-jack,$(PRIVATE_JACK_VM_ARGS),$(PRIVATE_JACK_EXTRA_ARGS)) \
+    $(strip $(PRIVATE_JACK_FLAGS)) \
+    $(strip $(PRIVATE_JACK_DEBUG_FLAGS)) \
+    $(if $(NO_OPTIMIZE_DX), \
+        -D jack.dex.optimize="false") \
+    $(addprefix --classpath ,$(strip \
+        $(call normalize-path-list,$(PRIVATE_BOOTCLASSPATH_JAVA_LIBRARIES) $(PRIVATE_ALL_JACK_LIBRARIES)))) \
+    $(addprefix --import ,$(call reverse-list,$(PRIVATE_STATIC_JACK_LIBRARIES))) \
+    $(if $(PRIVATE_EXTRA_JAR_ARGS),--import-resource $@.res.tmp) \
+    -D jack.import.resource.policy=keep-first \
+    -D jack.import.type.policy=keep-first \
+    --output-jack $(PRIVATE_CLASSES_JACK) \
+    -D jack.java.source.version=1.7 \
+    $(if $(PRIVATE_JACK_INCREMENTAL_DIR),--incremental-folder $(PRIVATE_JACK_INCREMENTAL_DIR)) \
+    --output-dex $(PRIVATE_JACK_INTERMEDIATES_DIR) \
+    $(addprefix --config-jarjar ,$(strip $(PRIVATE_JARJAR_RULES))) \
+    $(if $(PRIVATE_JACK_PROGUARD_FLAGS),--config-proguard $@.flags) \
+    $$tmpEcjArg \
+    || ( rm -rf $(PRIVATE_CLASSES_JACK); rm -rf $(PRIVATE_JACK_INTERMEDIATES_DIR); exit 41 )
+$(hide) mv $(PRIVATE_JACK_INTERMEDIATES_DIR)/classes*.dex $(dir $@)
+$(hide) rm -f $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list
+$(if $(PRIVATE_EXTRA_JAR_ARGS),$(hide) rm -rf $@.res.tmp)
+$(hide) mv $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list-uniq $(PRIVATE_JACK_INTERMEDIATES_DIR).java-source-list
+$(if $(PRIVATE_JAR_PACKAGES), $(hide) echo unsupported options PRIVATE_JAR_PACKAGES in $@; exit 53)
+$(if $(PRIVATE_JAR_EXCLUDE_PACKAGES), $(hide) echo unsupported options JAR_EXCLUDE_PACKAGES in $@; exit 53)
+$(if $(PRIVATE_JAR_MANIFEST), $(hide) echo unsupported options JAR_MANIFEST in $@; exit 53)
+endef
+
+define transform-jar-to-jack
+	$(hide) mkdir -p $(dir $@)
+	$(JILL) $(PRIVATE_JILL_FLAGS) --output $@.tmpjill.jack $<
+	$(hide) mkdir -p $@.tmpjill.res
+	$(hide) $(call unzip-jar-files,$<,$@.tmpjill.res)
+	$(hide) find $@.tmpjill.res -iname "*.class" -delete
+	$(hide) $(call call-jack,$(PRIVATE_JACK_VM_ARGS),$(PRIVATE_JACK_EXTRA_ARGS)) \
+        -D jack.import.resource.policy=keep-first \
+        -D jack.import.type.policy=keep-first \
+	    --import $@.tmpjill.jack \
+	    --import-resource $@.tmpjill.res \
+	    --output-jack $@
+	$(hide) rm -rf $@.tmpjill.res
+	$(hide) rm $@.tmpjill.jack
+endef
+
+
+# Invoke Jack to compile java from source to jack files without shrink or obfuscation.
+#
+# Some historical notes:
+# - below we write the list of java files to java-source-list to avoid argument
+#   list length problems with Cygwin
+# - we filter out duplicate java file names because Jack doesn't like them.
+define java-to-jack
+$(hide) rm -f $@
+$(hide) rm -rf $(PRIVATE_JACK_INTERMEDIATES_DIR)
+$(hide) mkdir -p $(dir $@)
+$(hide) mkdir -p $(PRIVATE_JACK_INTERMEDIATES_DIR)
+$(if $(PRIVATE_JACK_INCREMENTAL_DIR),$(hide) mkdir -p $(PRIVATE_JACK_INCREMENTAL_DIR))
+$(call dump-words-to-file,$(PRIVATE_JAVA_SOURCES),$(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list)
+$(hide) if [ -d "$(PRIVATE_SOURCE_INTERMEDIATES_DIR)" ]; then \
+          find $(PRIVATE_SOURCE_INTERMEDIATES_DIR) -name '*.java' >> $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list; \
+fi
+$(hide) tr ' ' '\n' < $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list \
+    | sort -u > $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list-uniq
+$(if $(PRIVATE_JACK_PROGUARD_FLAGS), \
+    $(hide) echo -basedirectory $(CURDIR) > $@.flags; \
+    echo $(PRIVATE_JACK_PROGUARD_FLAGS) >> $@.flags; \
+)
+$(if $(PRIVATE_EXTRA_JAR_ARGS),
+	$(hide) mkdir -p $@.res.tmp
+	$(hide) $(call create-empty-package-at,$@.res.tmp.zip)
+	$(hide) $(call add-java-resources-to,$@.res.tmp.zip)
+	$(hide) unzip -qo $@.res.tmp.zip -d $@.res.tmp
+	$(hide) rm $@.res.tmp.zip)
+$(hide) if [ -s $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list-uniq ] ; then \
+    export tmpEcjArg="@$(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list-uniq"; \
+else \
+    export tmpEcjArg=""; \
+fi; \
+$(call call-jack,$(PRIVATE_JACK_VM_ARGS),$(PRIVATE_JACK_EXTRA_ARGS)) \
+    $(strip $(PRIVATE_JACK_FLAGS)) \
+    $(strip $(PRIVATE_JACK_DEBUG_FLAGS)) \
+    $(if $(NO_OPTIMIZE_DX), \
+        -D jack.dex.optimize="false") \
+    $(addprefix --classpath ,$(strip \
+        $(call normalize-path-list,$(PRIVATE_BOOTCLASSPATH_JAVA_LIBRARIES) $(PRIVATE_ALL_JACK_LIBRARIES)))) \
+    $(addprefix --import ,$(call reverse-list,$(PRIVATE_STATIC_JACK_LIBRARIES))) \
+    $(if $(PRIVATE_EXTRA_JAR_ARGS),--import-resource $@.res.tmp) \
+    -D jack.import.resource.policy=keep-first \
+    -D jack.import.type.policy=keep-first \
+    -D jack.java.source.version=1.7 \
+    $(if $(PRIVATE_JACK_INCREMENTAL_DIR),--incremental-folder $(PRIVATE_JACK_INCREMENTAL_DIR)) \
+    --output-jack $@ \
+    $(addprefix --config-jarjar ,$(strip $(PRIVATE_JARJAR_RULES))) \
+    $(if $(PRIVATE_JACK_PROGUARD_FLAGS),--config-proguard $@.flags) \
+    $$tmpEcjArg \
+    || ( rm -f $@ ; exit 41 )
+$(hide) rm -f $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list
+$(if $(PRIVATE_EXTRA_JAR_ARGS),$(hide) rm -rf $@.res.tmp)
+$(hide) mv $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list-uniq $(PRIVATE_JACK_INTERMEDIATES_DIR).java-source-list
+$(if $(PRIVATE_JAR_PACKAGES), $(hide) echo unsupported options PRIVATE_JAR_PACKAGES in $@; exit 53)
+$(if $(PRIVATE_JAR_EXCLUDE_PACKAGES), $(hide) echo unsupported options JAR_EXCLUDE_PACKAGES in $@; exit 53)
+$(if $(PRIVATE_JAR_MANIFEST), $(hide) echo unsupported options JAR_MANIFEST in $@; exit 53)
+endef
+
 # Override the above definitions if we want to do incremetal javac
 ifeq (true, $(ENABLE_INCREMENTALJAVAC))
 define compile-java
@@ -1852,12 +2029,20 @@
 # Create a mostly-empty .jar file that we'll add to later.
 # The MacOS jar tool doesn't like creating empty jar files,
 # so we need to give it something.
+# $(1) package to create
+define create-empty-package-at
+@mkdir -p $(dir $(1))
+$(hide) touch $(dir $(1))zipdummy
+$(hide) (cd $(dir $(1)) && jar cf $(notdir $(1)) zipdummy)
+$(hide) zip -qd $(1) zipdummy
+$(hide) rm $(dir $(1))zipdummy
+endef
+
+# Create a mostly-empty .jar file that we'll add to later.
+# The MacOS jar tool doesn't like creating empty jar files,
+# so we need to give it something.
 define create-empty-package
-@mkdir -p $(dir $@)
-$(hide) touch $(dir $@)zipdummy
-$(hide) (cd $(dir $@) && jar cf $(notdir $@) zipdummy)
-$(hide) zip -qd $@ zipdummy
-$(hide) rm $(dir $@)zipdummy
+$(call create-empty-package-at,$@)
 endef
 
 # Copy an arhchive file and delete any class files and empty folders inside.
@@ -1931,6 +2116,19 @@
 @rm -f $(1).jar-arg-list
 endef
 
+# Add resources carried by static Jack libraries.
+#
+define add-carried-jack-resources
+ $(hide) if [ -d $(PRIVATE_JACK_INTERMEDIATES_DIR) ] ; then \
+    jack_res_jar_flags=$$(find $(PRIVATE_JACK_INTERMEDIATES_DIR) -type f \
+        | sed -e "s?^$(PRIVATE_JACK_INTERMEDIATES_DIR)/? -C $(PRIVATE_JACK_INTERMEDIATES_DIR) ?"); \
+    if [ -n "$$jack_res_jar_flags" ] ; then \
+        echo $$jack_res_jar_flags >$(dir $@)jack_res_jar_flags; \
+        jar uf $@ $$jack_res_jar_flags; \
+    fi; \
+fi
+endef
+
 # Sign a package using the specified key/cert.
 #
 define sign-package
diff --git a/core/dpi_specific_apk.mk b/core/dpi_specific_apk.mk
index 06e498d..5d0b5bf 100644
--- a/core/dpi_specific_apk.mk
+++ b/core/dpi_specific_apk.mk
@@ -25,24 +25,35 @@
 $(built_dpi_apk): PRIVATE_MANIFEST_INSTRUMENTATION_FOR := $(LOCAL_INSTRUMENTATION_FOR)
 $(built_dpi_apk): PRIVATE_JNI_SHARED_LIBRARIES := $(jni_shared_libraries_with_abis)
 $(built_dpi_apk): PRIVATE_JNI_SHARED_LIBRARIES_ABI := $(jni_shared_libraries_abis)
-$(built_dpi_apk): PRIVATE_DEX_FILE := $(built_dex)
-# Note that PRIVATE_CLASS_INTERMEDIATES_DIR points to the base apk's intermediate dir.
-$(built_dpi_apk): PRIVATE_CLASS_INTERMEDIATES_DIR := $(intermediates)/classes
-$(built_dpi_apk): PRIVATE_EXTRA_JAR_ARGS := $(extra_jar_args)
 $(built_dpi_apk): PRIVATE_PRIVATE_KEY := $(private_key)
 $(built_dpi_apk): PRIVATE_CERTIFICATE := $(certificate)
 $(built_dpi_apk): PRIVATE_ADDITIONAL_CERTIFICATES := $(foreach c,\
     $(LOCAL_ADDITIONAL_CERTIFICATES), $(c).x509.pem $(c).pk8)
 
+$(built_dpi_apk): PRIVATE_SOURCE_ARCHIVE :=
+ifneq ($(full_classes_jar),)
+$(built_dpi_apk): PRIVATE_DEX_FILE := $(built_dex)
+ifndef LOCAL_JACK_ENABLED
+# Use the jarjar processed arhive as the initial package file.
+$(built_dpi_apk): PRIVATE_SOURCE_ARCHIVE := $(full_classes_jarjar_jar)
+else
+$(built_dpi_apk): PRIVATE_JACK_INTERMEDIATES_DIR := $(intermediates.COMMON)/jack-rsc
+endif # LOCAL_JACK_ENABLED
+$(built_dpi_apk): $(built_dex)
+else
+$(built_dpi_apk): PRIVATE_DEX_FILE :=
+endif # full_classes_jar
+
 # Set up dependenncies and the build recipe.
 $(built_dpi_apk) : $(R_file_stamp)
 $(built_dpi_apk) : $(all_library_res_package_export_deps)
-$(built_dpi_apk) : $(built_dex)
 $(built_dpi_apk) : $(private_key) $(certificate) $(SIGNAPK_JAR)
 $(built_dpi_apk) : $(AAPT) | $(ZIPALIGN)
 $(built_dpi_apk) : $(all_res_assets) $(jni_shared_libraries) $(full_android_manifest)
 	@echo "target Package: $(PRIVATE_MODULE) ($@)"
-	$(create-empty-package)
+	$(if $(PRIVATE_SOURCE_ARCHIVE),\
+	  $(call initialize-package-file,$(PRIVATE_SOURCE_ARCHIVE),$@),\
+	  $(create-empty-package))
 	$(add-assets-to-package)
 ifneq ($(jni_shared_libraries),)
 	$(add-jni-shared-libs-to-package)
@@ -52,10 +63,9 @@
 	$(if $(PRIVATE_EXTRA_JAR_ARGS),$(call add-java-resources-to,$@))
 else
 	$(add-dex-to-package)
+ifdef LOCAL_JACK_ENABLED
+	$(add-carried-jack-resources)
 endif
-	$(add-carried-java-resources)
-ifneq ($(extra_jar_args),)
-	$(add-java-resources-to-package)
 endif
 	$(sign-package)
 	$(align-package)
diff --git a/core/dynamic_binary.mk b/core/dynamic_binary.mk
index fe498ed..f015052 100644
--- a/core/dynamic_binary.mk
+++ b/core/dynamic_binary.mk
@@ -39,6 +39,38 @@
 ###################################
 
 ###########################################################
+## Pack relocation tables
+###########################################################
+relocation_packer_input := $(linked_module)
+relocation_packer_output := $(intermediates)/PACKED/$(my_built_module_stem)
+
+my_pack_module_relocations := $(LOCAL_PACK_MODULE_RELOCATIONS)
+
+ifeq ($(my_pack_module_relocations),)
+  my_pack_module_relocations := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_PACK_MODULE_RELOCATIONS)
+endif
+
+# Do not pack relocations for static executables.
+ifeq ($(LOCAL_FORCE_STATIC_EXECUTABLE),true)
+  my_pack_module_relocations := false
+endif
+
+# TODO (dimitry): Relocation packer is not yet available for darwin
+ifneq ($(HOST_OS),linux)
+  my_pack_module_relocations := false
+endif
+
+ifeq (true,$(my_pack_module_relocations))
+# Pack relocations
+$(relocation_packer_output): $(relocation_packer_input) | $(ACP)
+	$(pack-elf-relocations)
+else
+$(relocation_packer_output): $(relocation_packer_input) | $(ACP)
+	@echo "target Unpacked: $(PRIVATE_MODULE) ($@)"
+	$(copy-file-to-target)
+endif
+
+###########################################################
 ## Store a copy with symbols for symbolic debugging
 ###########################################################
 ifeq ($(LOCAL_UNSTRIPPED_PATH),)
@@ -46,7 +78,7 @@
 else
 my_unstripped_path := $(LOCAL_UNSTRIPPED_PATH)
 endif
-symbolic_input := $(linked_module)
+symbolic_input := $(relocation_packer_output)
 symbolic_output := $(my_unstripped_path)/$(my_installed_module_stem)
 $(symbolic_output) : $(symbolic_input) | $(ACP)
 	@echo "target Symbolic: $(PRIVATE_MODULE) ($@)"
@@ -57,7 +89,7 @@
 ## Strip
 ###########################################################
 strip_input := $(symbolic_output)
-strip_output := $(intermediates)/STRIPPED/$(my_built_module_stem)
+strip_output := $(LOCAL_BUILT_MODULE)
 
 my_strip_module := $(LOCAL_STRIP_MODULE)
 ifeq ($(my_strip_module),)
@@ -107,38 +139,6 @@
 endif
 endif # my_strip_module
 
-###########################################################
-## Pack relocation tables
-###########################################################
-relocation_packer_input := $(strip_output)
-relocation_packer_output := $(LOCAL_BUILT_MODULE)
-
-my_pack_module_relocations := $(LOCAL_PACK_MODULE_RELOCATIONS)
-
-ifeq ($(my_pack_module_relocations),)
-  my_pack_module_relocations := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_PACK_MODULE_RELOCATIONS)
-endif
-
-# Do not pack relocations for static executables.
-ifeq ($(LOCAL_FORCE_STATIC_EXECUTABLE),true)
-  my_pack_module_relocations := false
-endif
-
-# TODO (dimitry): Relocation packer is not yet available for darwin
-ifneq ($(HOST_OS),linux)
-  my_pack_module_relocations := false
-endif
-
-ifeq (true,$(my_pack_module_relocations))
-# Pack relocations
-$(relocation_packer_output): $(relocation_packer_input) | $(ACP)
-	$(pack-elf-relocations)
-else
-$(relocation_packer_output): $(relocation_packer_input) | $(ACP)
-	@echo "target Unpacked: $(PRIVATE_MODULE) ($@)"
-	$(copy-file-to-target)
-endif
-
 $(cleantarget): PRIVATE_CLEAN_FILES += \
     $(linked_module) \
     $(symbolic_output) \
diff --git a/core/executable_prefer_symlink.mk b/core/executable_prefer_symlink.mk
index 2326e83..fc97ad3 100644
--- a/core/executable_prefer_symlink.mk
+++ b/core/executable_prefer_symlink.mk
@@ -39,7 +39,10 @@
   endif
 endif
 
-$(my_symlink): $(LOCAL_INSTALLED_MODULE) $(LOCAL_MODULE_MAKEFILE)
+# $(my_symlink) doesn't need to depend on $(PRIVATE_SRC_BINARY_NAME): we can generate symlink to nonexistent file.
+# If you add the dependency, make would compare the timestamp of a file against that of its symlink:
+# they are always equal, because make follows symlink.
+$(my_symlink): $(LOCAL_MODULE_MAKEFILE)
 	@echo "Symlink: $@ -> $(PRIVATE_SRC_BINARY_NAME)"
 	@mkdir -p $(dir $@)
 	@rm -rf $@
diff --git a/core/host_dalvik_java_library.mk b/core/host_dalvik_java_library.mk
index f8264ee..ff5ee1e 100644
--- a/core/host_dalvik_java_library.mk
+++ b/core/host_dalvik_java_library.mk
@@ -34,11 +34,13 @@
 full_classes_compiled_jar := $(intermediates.COMMON)/classes-full-debug.jar
 full_classes_jarjar_jar := $(intermediates.COMMON)/classes-jarjar.jar
 full_classes_jar := $(intermediates.COMMON)/classes.jar
+full_classes_jack := $(intermediates.COMMON)/classes.jack
 built_dex := $(intermediates.COMMON)/classes.dex
 
 LOCAL_INTERMEDIATE_TARGETS += \
     $(full_classes_compiled_jar) \
     $(full_classes_jarjar_jar) \
+    $(full_classes_jack) \
     $(full_classes_jar) \
     $(built_dex)
 
@@ -96,6 +98,7 @@
 	@echo Copying: $@
 	$(hide) $(ACP) -fp $< $@
 
+ifndef LOCAL_JACK_ENABLED
 $(built_dex): PRIVATE_INTERMEDIATES_DIR := $(intermediates.COMMON)
 $(built_dex): PRIVATE_DX_FLAGS := $(LOCAL_DX_FLAGS)
 $(built_dex): $(full_classes_jar) $(DX)
@@ -109,6 +112,42 @@
 	$(call initialize-package-file,$(PRIVATE_SOURCE_ARCHIVE),$@)
 	$(add-dex-to-package)
 
+else # LOCAL_JACK_ENABLED
+$(LOCAL_INTERMEDIATE_TARGETS): \
+	PRIVATE_JACK_INTERMEDIATES_DIR := $(intermediates.COMMON)/jack-rsc
+
+ifeq ($(LOCAL_JACK_ENABLED),incremental)
+$(LOCAL_INTERMEDIATE_TARGETS): \
+	PRIVATE_JACK_INCREMENTAL_DIR := $(intermediates.COMMON)/jack-incremental
+else
+$(LOCAL_INTERMEDIATE_TARGETS): \
+	PRIVATE_JACK_INCREMENTAL_DIR :=
+endif
+$(LOCAL_INTERMEDIATE_TARGETS):  PRIVATE_JACK_DEBUG_FLAGS := -g
+
+$(built_dex): PRIVATE_CLASSES_JACK := $(full_classes_jack)
+$(built_dex): PRIVATE_JACK_FLAGS := $(LOCAL_JACK_FLAGS)
+$(built_dex): $(java_sources) $(java_resource_sources) $(full_jack_lib_deps) \
+        $(jar_manifest_file) $(proto_java_sources_file_stamp) $(LOCAL_MODULE_MAKEFILE) \
+        $(LOCAL_MODULE_MAKEFILE) $(LOCAL_ADDITIONAL_DEPENDENCIES) $(JACK_JAR) $(JACK_LAUNCHER_JAR)
+	@echo Building with Jack: $@
+	$(jack-java-to-dex)
+
+# $(full_classes_jack) is just by-product of $(built_dex).
+# The dummy command was added because, without it, make misses the fact the $(built_dex) also
+# change $(full_classes_jack).
+$(full_classes_jack): $(built_dex)
+	$(hide) touch $@
+
+$(LOCAL_BUILT_MODULE): PRIVATE_DEX_FILE := $(built_dex)
+$(LOCAL_BUILT_MODULE): $(built_dex) $(java_resource_sources)
+	@echo "Host Jar: $(PRIVATE_MODULE) ($@)"
+	$(create-empty-package)
+	$(add-dex-to-package)
+	$(add-carried-jack-resources)
+
+endif # LOCAL_JACK_ENABLED
+
 USE_CORE_LIB_BOOTCLASSPATH :=
 
 endif
diff --git a/core/host_dalvik_static_java_library.mk b/core/host_dalvik_static_java_library.mk
index 9e5aaa3..90bcc12 100644
--- a/core/host_dalvik_static_java_library.mk
+++ b/core/host_dalvik_static_java_library.mk
@@ -21,11 +21,37 @@
 #
 ifeq ($(HOST_OS),linux)
 
+LOCAL_UNINSTALLABLE_MODULE := true
+LOCAL_IS_STATIC_JAVA_LIBRARY := true
 USE_CORE_LIB_BOOTCLASSPATH := true
 LOCAL_JAVA_LIBRARIES += core-libart-hostdex
 
+intermediates.COMMON := $(call intermediates-dir-for,JAVA_LIBRARIES,$(LOCAL_MODULE),true,COMMON,)
+full_classes_jack := $(intermediates.COMMON)/classes.jack
+LOCAL_INTERMEDIATE_TARGETS += \
+    $(full_classes_jack)
+
 include $(BUILD_SYSTEM)/host_java_library.mk
+# proguard is not supported
+# *.proto files are not supported
+$(full_classes_jack): PRIVATE_JACK_FLAGS := $(LOCAL_JACK_FLAGS)
+$(full_classes_jack): PRIVATE_JARJAR_RULES := $(LOCAL_JARJAR_RULES)
+$(full_classes_jack): \
+	PRIVATE_JACK_INTERMEDIATES_DIR := $(intermediates.COMMON)/jack-rsc
+ifeq ($(LOCAL_JACK_ENABLED),incremental)
+$(full_classes_jack): \
+	PRIVATE_JACK_INCREMENTAL_DIR := $(intermediates.COMMON)/jack-incremental
+else
+$(full_classes_jack): \
+	PRIVATE_JACK_INCREMENTAL_DIR :=
+endif
+$(full_classes_jack): $(java_sources) $(java_resource_sources) $(full_jack_lib_deps) \
+        $(jar_manifest_file) $(layers_file) $(LOCAL_MODULE_MAKEFILE) \
+        $(LOCAL_ADDITIONAL_DEPENDENCIES) $(LOCAL_JARJAR_RULES) \
+        $(JACK_JAR) $(JACK_LAUNCHER_JAR)
+	@echo Building with Jack: $@
+	$(java-to-jack)
 
 USE_CORE_LIB_BOOTCLASSPATH :=
-
+LOCAL_IS_STATIC_JAVA_LIBRARY :=
 endif
diff --git a/core/host_java_library.mk b/core/host_java_library.mk
index b751c5f..513d185 100644
--- a/core/host_java_library.mk
+++ b/core/host_java_library.mk
@@ -58,13 +58,13 @@
 $(full_classes_emma_jar) : $(full_classes_compiled_jar) | $(EMMA_JAR)
 	$(transform-classes.jar-to-emma)
 
-$(LOCAL_BUILT_MODULE) : $(full_classes_emma_jar)
+$(built_javalib_jar) : $(full_classes_emma_jar)
 	@echo Copying: $@
 	$(hide) $(ACP) -fp $< $@
 
 else # LOCAL_EMMA_INSTRUMENT
-# Directly build into LOCAL_BUILT_MODULE.
-full_classes_compiled_jar := $(LOCAL_BUILT_MODULE)
+# Directly build into $(built_javalib_jar).
+full_classes_compiled_jar := $(built_javalib_jar)
 endif # LOCAL_EMMA_INSTRUMENT
 
 $(full_classes_compiled_jar): PRIVATE_JAVAC_DEBUG_FLAGS := -g
diff --git a/core/host_java_library_common.mk b/core/host_java_library_common.mk
index cd9e679..35a6e28 100644
--- a/core/host_java_library_common.mk
+++ b/core/host_java_library_common.mk
@@ -23,6 +23,22 @@
 LOCAL_IS_HOST_MODULE := true
 LOCAL_BUILT_MODULE_STEM := javalib.jar
 
+intermediates := $(call local-intermediates-dir)
+intermediates.COMMON := $(call local-intermediates-dir,COMMON)
+
+built_javalib_jar := $(intermediates)/javalib.jar
+
+#################################
+include $(BUILD_SYSTEM)/configure_local_jack.mk
+#################################
+
+ifdef LOCAL_JACK_ENABLED
+ifdef LOCAL_IS_STATIC_JAVA_LIBRARY
+LOCAL_BUILT_MODULE_STEM := classes.jack
+LOCAL_INTERMEDIATE_TARGETS += $(built_javalib_jar)
+endif
+endif
+
 # base_rules.mk looks at this
 all_res_assets :=
 
@@ -34,14 +50,15 @@
   ifeq ($(LOCAL_PROTOC_OPTIMIZE_TYPE),nano)
     LOCAL_JAVA_LIBRARIES += host-libprotobuf-java-nano
   else
-    LOCAL_JAVA_LIBRARIES += host-libprotobuf-java-lite
+    ifeq ($(LOCAL_PROTOC_OPTIMIZE_TYPE),full)
+      LOCAL_JAVA_LIBRARIES += host-libprotobuf-java-full
+    else
+      LOCAL_JAVA_LIBRARIES += host-libprotobuf-java-lite
+    endif
   endif
 endif
 endif
 
-intermediates := $(call local-intermediates-dir)
-intermediates.COMMON := $(call local-intermediates-dir,COMMON)
-
 LOCAL_INTERMEDIATE_SOURCE_DIR := $(intermediates.COMMON)/src
 LOCAL_JAVA_LIBRARIES := $(sort $(LOCAL_JAVA_LIBRARIES))
 
diff --git a/core/install_jni_libs_internal.mk b/core/install_jni_libs_internal.mk
index c28bb15..634fdf3 100644
--- a/core/install_jni_libs_internal.mk
+++ b/core/install_jni_libs_internal.mk
@@ -85,6 +85,15 @@
 ifndef my_prebuilt_src_file
 $(error No prebuilt apk to extract prebuilt jni libraries $(my_extracted_jni_libs))
 endif
+ifeq ($(LOCAL_CERTIFICATE),PRESIGNED)
+$(warning Extracting files using LOCAL_PREBUILT_JNI_LIBS cannot be done while)
+$(warning using LOCAL_CERTIFICATE:=PRESIGNED, as this would corrupt)
+$(warning the APK or waste disk space. Instead, you should delete)
+$(warning LOCAL_PREBUILT_JNI_LIBS and use LOCAL_PAGE_ALIGN_JNI_SHARED_LIBRARIES:=true)
+$(warning This will allow loading of shared libraries directly from the APK,)
+$(warning eliminating the need to separately extract them.)
+$(error Failed to build: $(LOCAL_MODULE))
+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 := $(my_extracted_jni_libs)
diff --git a/core/java.mk b/core/java.mk
index fc4703c..73b8780 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -7,7 +7,9 @@
 ifeq ($(TARGET_BUILD_PDK_JAVA_PLATFORM),)
 # LOCAL_SDK not defined or set to current
 ifeq ($(filter-out current,$(LOCAL_SDK_VERSION)),)
+ifneq ($(LOCAL_NO_STANDARD_LIBRARIES),true)
 LOCAL_SDK_VERSION := $(PDK_BUILD_SDK_VERSION)
+endif #!LOCAL_NO_STANDARD_LIBRARIES
 endif
 endif # !PDK_JAVA
 endif #PDK
@@ -112,6 +114,10 @@
 full_classes_jar := $(intermediates.COMMON)/classes.jar
 built_dex := $(intermediates.COMMON)/classes.dex
 endif
+# final Jack library, shrinked and obfuscated if it must be
+full_classes_jack := $(intermediates.COMMON)/classes.jack
+# intermediate Jack library without shrink and obfuscation
+noshrob_classes_jack := $(intermediates.COMMON)/classes.noshrob.jack
 
 LOCAL_INTERMEDIATE_TARGETS += \
     $(full_classes_compiled_jar) \
@@ -120,6 +126,8 @@
     $(full_classes_jar) \
     $(full_classes_proguard_jar) \
     $(built_dex_intermediate) \
+    $(full_classes_jack) \
+    $(noshrob_classes_jack) \
     $(built_dex) \
     $(full_classes_stubs_jar)
 
@@ -338,7 +346,7 @@
 # - This extra copy, with the dependency on LOCAL_BUILT_MODULE allows the
 #   PRIVATE_ vars to be preserved.
 $(full_classes_stubs_jar): PRIVATE_SOURCE_FILE := $(full_classes_jar)
-$(full_classes_stubs_jar) : $(LOCAL_BUILT_MODULE) | $(ACP)
+$(full_classes_stubs_jar) : $(full_classes_jar) | $(ACP)
 	@echo Copying $(PRIVATE_SOURCE_FILE)
 	$(hide) $(ACP) -fp $(PRIVATE_SOURCE_FILE) $@
 ALL_MODULES.$(LOCAL_MODULE).STUBS := $(full_classes_stubs_jar)
@@ -424,50 +432,78 @@
     $(error invalid value for LOCAL_PROGUARD_ENABLED: $(LOCAL_PROGUARD_ENABLED))
 endif
 proguard_dictionary := $(intermediates.COMMON)/proguard_dictionary
-proguard_flags := $(addprefix -libraryjars ,$(full_shared_java_libs)) \
+
+# Hack: see b/20667396
+# When an app's LOCAL_SDK_VERSION is lower than the support library's LOCAL_SDK_VERSION,
+# we artifically raises the "SDK version" "linked" by ProGuard, to
+# - suppress ProGuard warnings of referencing symbols unknown to the lower SDK version.
+# - prevent ProGuard stripping subclass in the support library that extends class added in the higher SDK version.
+my_support_library_sdk_raise :=
+ifneq (,$(filter android-support-%,$(LOCAL_STATIC_JAVA_LIBRARIES)))
+ifdef LOCAL_SDK_VERSION
+ifeq (,$(filter current system_current, $(LOCAL_SDK_VERSION)))
+ifdef TARGET_BUILD_APPS
+  my_support_library_sdk_raise := $(call java-lib-files, sdk_vcurrent)
+else
+  # For platform build, we can't just raise to the "current" SDK,
+  # that would break apps that use APIs removed from the current SDK.
+  my_support_library_sdk_raise := $(call java-lib-files,framework)
+endif
+endif
+endif
+endif
+
+# jack already has the libraries in its classpath and doesn't support jars
+legacy_proguard_flags := $(addprefix -libraryjars ,$(my_support_library_sdk_raise) $(full_shared_java_libs))
+common_proguard_flags :=  \
                   -forceprocessing \
                   -printmapping $(proguard_dictionary)
 
 ifeq ($(filter nosystem,$(LOCAL_PROGUARD_ENABLED)),)
-proguard_flags += -include $(BUILD_SYSTEM)/proguard.flags
+common_proguard_flags += -include $(BUILD_SYSTEM)/proguard.flags
 ifeq ($(LOCAL_EMMA_INSTRUMENT),true)
-proguard_flags += -include $(BUILD_SYSTEM)/proguard.emma.flags
+common_proguard_flags += -include $(BUILD_SYSTEM)/proguard.emma.flags
 endif
 # If this is a test package, add proguard keep flags for tests.
 ifneq ($(LOCAL_INSTRUMENTATION_FOR)$(filter tests,$(LOCAL_MODULE_TAGS)),)
-proguard_flags += -include $(BUILD_SYSTEM)/proguard_tests.flags
+common_proguard_flags += -include $(BUILD_SYSTEM)/proguard_tests.flags
 ifeq ($(filter shrinktests,$(LOCAL_PROGUARD_ENABLED)),)
-proguard_flags += -dontshrink # don't shrink tests by default
+common_proguard_flags += -dontshrink # don't shrink tests by default
 endif # shrinktests
 endif # test package
 ifeq ($(filter obfuscation,$(LOCAL_PROGUARD_ENABLED)),)
 # By default no obfuscation
-proguard_flags += -dontobfuscate
+common_proguard_flags += -dontobfuscate
 endif  # No obfuscation
 ifeq ($(filter optimization,$(LOCAL_PROGUARD_ENABLED)),)
 # By default no optimization
-proguard_flags += -dontoptimize
+common_proguard_flags += -dontoptimize
 endif  # No optimization
 
 ifdef LOCAL_INSTRUMENTATION_FOR
 ifeq ($(filter obfuscation,$(LOCAL_PROGUARD_ENABLED)),)
 # If no obfuscation, link in the instrmented package's classes.jar as a library.
 # link_instr_classes_jar is defined in base_rule.mk
-proguard_flags += -libraryjars $(link_instr_classes_jar)
+# jack already has this library in its classpath and doesn't support jars
+legacy_proguard_flags += -libraryjars $(link_instr_classes_jar)
 else # obfuscation
 # If obfuscation is enabled, the main app must be obfuscated too.
 # We need to run obfuscation using the main app's dictionary,
 # and treat the main app's class.jar as injars instead of libraryjars.
-proguard_flags := -injars  $(link_instr_classes_jar) \
+legacy_proguard_flags := -injars  $(link_instr_classes_jar) \
     -outjars $(intermediates.COMMON)/proguard.$(LOCAL_INSTRUMENTATION_FOR).jar \
     -include $(link_instr_intermediates_dir.COMMON)/proguard_options \
     -applymapping $(link_instr_intermediates_dir.COMMON)/proguard_dictionary \
     -verbose \
-    $(proguard_flags)
+    $(legacy_proguard_flags)
+# not supported with jack
+ifdef LOCAL_JACK_ENABLED
+    $(error $(LOCAL_MODULE): Build with jack of instrumentation when obfuscating is not yet supported)
+endif
 
 # Sometimes (test + main app) uses different keep rules from the main app -
 # apply the main app's dictionary anyway.
-proguard_flags += -ignorewarnings
+legacy_proguard_flags += -ignorewarnings
 
 # Make sure we run Proguard on the main app first
 $(full_classes_proguard_jar) : $(link_instr_intermediates_dir.COMMON)/proguard.classes.jar
@@ -485,8 +521,8 @@
 extra_input_jar :=
 endif
 $(full_classes_proguard_jar): PRIVATE_EXTRA_INPUT_JAR := $(extra_input_jar)
-$(full_classes_proguard_jar): PRIVATE_PROGUARD_FLAGS := $(proguard_flags) $(LOCAL_PROGUARD_FLAGS)
-$(full_classes_proguard_jar) : $(full_classes_jar) $(extra_input_jar) $(proguard_flag_files) | $(ACP) $(PROGUARD)
+$(full_classes_proguard_jar): PRIVATE_PROGUARD_FLAGS := $(legacy_proguard_flags) $(common_proguard_flags) $(LOCAL_PROGUARD_FLAGS)
+$(full_classes_proguard_jar) : $(full_classes_jar) $(extra_input_jar) $(my_support_library_sdk_raise) $(proguard_flag_files) | $(ACP) $(PROGUARD)
 	$(call transform-jar-to-proguard)
 
 else  # LOCAL_PROGUARD_ENABLED not defined
@@ -496,7 +532,7 @@
 
 endif # LOCAL_PROGUARD_ENABLED defined
 
-
+ifndef LOCAL_JACK_ENABLED
 # Override PRIVATE_INTERMEDIATES_DIR so that install-dex-debug
 # will work even when intermediates != intermediates.COMMON.
 $(built_dex_intermediate): PRIVATE_INTERMEDIATES_DIR := $(intermediates.COMMON)
@@ -512,6 +548,8 @@
 endif
 $(built_dex_intermediate): $(full_classes_proguard_jar) $(DX)
 	$(transform-classes.jar-to-dex)
+endif # LOCAL_JACK_ENABLED is disabled
+
 $(built_dex): $(built_dex_intermediate) | $(ACP)
 	@echo Copying: $@
 	$(hide) mkdir -p $(dir $@)
@@ -522,17 +560,14 @@
 endif
 
 findbugs_xml := $(intermediates.COMMON)/findbugs.xml
-$(findbugs_xml) : PRIVATE_JAR_FILE := $(full_classes_jar)
 $(findbugs_xml) : PRIVATE_AUXCLASSPATH := $(addprefix -auxclasspath ,$(strip \
 								$(call normalize-path-list,$(filter %.jar,\
 										$(full_java_libs)))))
-# We can't depend directly on full_classes_jar because the PRIVATE_
-# vars won't be set up correctly.
-$(findbugs_xml) : $(LOCAL_BUILT_MODULE)
+$(findbugs_xml) : $(full_classes_jar)
 	@echo Findbugs: $@
 	$(hide) $(FINDBUGS) -textui -effort:min -xml:withMessages \
 		$(PRIVATE_AUXCLASSPATH) \
-		$(PRIVATE_JAR_FILE) \
+		$< \
 		> $@
 
 ALL_FINDBUGS_FILES += $(findbugs_xml)
@@ -549,3 +584,72 @@
 $(LOCAL_MODULE)-findbugs : $(findbugs_html)
 
 endif  # full_classes_jar is defined
+
+ifdef LOCAL_JACK_ENABLED
+$(LOCAL_INTERMEDIATE_TARGETS): \
+	PRIVATE_JACK_INTERMEDIATES_DIR := $(intermediates.COMMON)/jack-rsc
+ifeq ($(LOCAL_JACK_ENABLED),incremental)
+$(LOCAL_INTERMEDIATE_TARGETS): \
+	PRIVATE_JACK_INCREMENTAL_DIR := $(intermediates.COMMON)/jack-incremental
+else
+$(LOCAL_INTERMEDIATE_TARGETS): \
+	PRIVATE_JACK_INCREMENTAL_DIR :=
+endif
+
+ifdef full_classes_jar
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_DEBUG_FLAGS := -g
+
+ifdef LOCAL_PROGUARD_ENABLED
+
+ifndef LOCAL_JACK_PROGUARD_FLAGS
+    LOCAL_JACK_PROGUARD_FLAGS := $(LOCAL_PROGUARD_FLAGS)
+endif
+LOCAL_JACK_PROGUARD_FLAGS += $(addprefix -include , $(proguard_flag_files))
+ifdef LOCAL_TEST_MODULE_TO_PROGUARD_WITH
+    $(error $(LOCAL_MODULE): Build with jack when LOCAL_TEST_MODULE_TO_PROGUARD_WITH is defined is not yet implemented)
+endif
+
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_PROGUARD_FLAGS := $(common_proguard_flags) $(LOCAL_JACK_PROGUARD_FLAGS)
+else  # LOCAL_PROGUARD_ENABLED not defined
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_PROGUARD_FLAGS :=
+endif # LOCAL_PROGUARD_ENABLED defined
+
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_FLAGS := $(LOCAL_JACK_FLAGS)
+
+jack_all_deps := $(java_sources) $(java_resource_sources) $(full_jack_lib_deps) \
+        $(jar_manifest_file) $(layers_file) $(RenderScript_file_stamp) $(proguard_flag_files) \
+        $(proto_java_sources_file_stamp) $(LOCAL_ADDITIONAL_DEPENDENCIES) $(LOCAL_JARJAR_RULES) \
+        $(LOCAL_MODULE_MAKEFILE) $(JACK_JAR) $(JACK_LAUNCHER_JAR)
+
+ifeq ($(LOCAL_IS_STATIC_JAVA_LIBRARY),true)
+$(full_classes_jack): $(jack_all_deps)
+	@echo Building with Jack: $@
+	$(java-to-jack)
+
+else #LOCAL_IS_STATIC_JAVA_LIBRARY
+$(built_dex_intermediate): PRIVATE_CLASSES_JACK := $(full_classes_jack)
+
+$(built_dex_intermediate): $(jack_all_deps)
+	@echo Building with Jack: $@
+	$(jack-java-to-dex)
+
+# $(full_classes_jack) is just by-product of $(built_dex_intermediate).
+# The dummy command was added because, without it, make misses the fact the $(built_dex) also
+# change $(full_classes_jack).
+$(full_classes_jack): $(built_dex_intermediate)
+	$(hide) touch $@
+
+endif #LOCAL_IS_STATIC_JAVA_LIBRARY
+
+$(noshrob_classes_jack): PRIVATE_JACK_INTERMEDIATES_DIR := $(intermediates.COMMON)/jack-noshrob-rsc
+ifeq ($(LOCAL_JACK_ENABLED),incremental)
+$(noshrob_classes_jack): PRIVATE_JACK_INCREMENTAL_DIR := $(intermediates.COMMON)/jack-noshrob-incremental
+else
+$(noshrob_classes_jack): PRIVATE_JACK_INCREMENTAL_DIR :=
+endif
+$(noshrob_classes_jack): PRIVATE_JACK_PROGUARD_FLAGS :=
+$(noshrob_classes_jack): $(jack_all_deps)
+	@echo Building with Jack: $@
+	$(java-to-jack)
+endif  # full_classes_jar is defined
+endif # LOCAL_JACK_ENABLED
diff --git a/core/java_library.mk b/core/java_library.mk
index b4e3eaa..5a2d19b 100644
--- a/core/java_library.mk
+++ b/core/java_library.mk
@@ -24,10 +24,20 @@
 
 LOCAL_BUILT_MODULE_STEM := javalib.jar
 
+#################################
+include $(BUILD_SYSTEM)/configure_local_jack.mk
+#################################
+
+ifdef LOCAL_JACK_ENABLED
+ifdef LOCAL_IS_STATIC_JAVA_LIBRARY
+LOCAL_BUILT_MODULE_STEM := classes.jack
+endif
+endif
+
 intermediates.COMMON := $(call local-intermediates-dir,COMMON)
 
 # This file will be the one that other modules should depend on.
-common_javalib.jar := $(intermediates.COMMON)/$(LOCAL_BUILT_MODULE_STEM)
+common_javalib.jar := $(intermediates.COMMON)/javalib.jar
 LOCAL_INTERMEDIATE_TARGETS += $(common_javalib.jar)
 
 ifeq ($(LOCAL_PROGUARD_ENABLED),disabled)
@@ -59,7 +69,11 @@
 	@echo "target Static Jar: $(PRIVATE_MODULE) ($@)"
 	$(copy-file-to-target)
 
-$(LOCAL_BUILT_MODULE): $(common_javalib.jar)
+ifdef LOCAL_JACK_ENABLED
+$(LOCAL_BUILT_MODULE) : $(full_classes_jack)
+else
+$(LOCAL_BUILT_MODULE) : $(common_javalib.jar)
+endif
 	$(copy-file-to-target)
 
 else # !LOCAL_IS_STATIC_JAVA_LIBRARY
@@ -69,8 +83,15 @@
 $(common_javalib.jar): PRIVATE_DONT_DELETE_JAR_DIRS := $(LOCAL_DONT_DELETE_JAR_DIRS)
 $(common_javalib.jar) : $(built_dex) $(java_resource_sources)
 	@echo "target Jar: $(PRIVATE_MODULE) ($@)"
+ifdef LOCAL_JACK_ENABLED
+	$(create-empty-package)
+else
 	$(call initialize-package-file,$(PRIVATE_SOURCE_ARCHIVE),$@)
+endif
 	$(add-dex-to-package)
+ifdef LOCAL_JACK_ENABLED
+	$(add-carried-jack-resources)
+endif
 
 ifdef LOCAL_DEX_PREOPT
 ifneq ($(dexpreopt_boot_jar_module),) # boot jar
diff --git a/core/main.mk b/core/main.mk
index 41e2801..3bf9cae 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -914,7 +914,9 @@
   # For uninstallable modules such as static Java library, we have to dist the built file,
   # as <module_name>.<suffix>
   apps_only_dist_built_files := $(foreach m,$(unbundled_build_modules),$(if $(ALL_MODULES.$(m).INSTALLED),,\
-      $(if $(ALL_MODULES.$(m).BUILT),$(ALL_MODULES.$(m).BUILT):$(m)$(suffix $(ALL_MODULES.$(m).BUILT)))))
+      $(if $(ALL_MODULES.$(m).BUILT),$(ALL_MODULES.$(m).BUILT):$(m)$(suffix $(ALL_MODULES.$(m).BUILT)))\
+      $(if $(ALL_MODULES.$(m).AAR),$(ALL_MODULES.$(m).AAR):$(m).aar)\
+      ))
   $(call dist-for-goals,apps_only, $(apps_only_dist_built_files))
 
   ifeq ($(EMMA_INSTRUMENT),true)
diff --git a/core/notice_files.mk b/core/notice_files.mk
index e63cd84..43a5435 100644
--- a/core/notice_files.mk
+++ b/core/notice_files.mk
@@ -43,7 +43,7 @@
       # javalib.jar is the default name for the build module (and isn't meaningful)
       # If that's what we have, substitute the module name instead.  These files
       # aren't included on the device, so this name is synthetic anyway.
-      ifeq ($(module_leaf),javalib.jar)
+      ifneq ($(filter javalib.jar classes.jack,$(module_leaf)),)
         module_leaf := $(LOCAL_MODULE).jar
       endif
       module_installed_filename := \
diff --git a/core/package_internal.mk b/core/package_internal.mk
index d52997b..fee484f 100644
--- a/core/package_internal.mk
+++ b/core/package_internal.mk
@@ -57,6 +57,10 @@
 endif
 LOCAL_MODULE_CLASS := APPS
 
+#################################
+include $(BUILD_SYSTEM)/configure_local_jack.mk
+#################################
+
 # Package LOCAL_MODULE_TAGS default to optional
 LOCAL_MODULE_TAGS := $(strip $(LOCAL_MODULE_TAGS))
 ifeq ($(LOCAL_MODULE_TAGS),)
@@ -162,6 +166,13 @@
 endif # !custom
 LOCAL_PROGUARD_FLAGS := $(addprefix -include ,$(proguard_options_file)) $(LOCAL_PROGUARD_FLAGS)
 
+ifdef LOCAL_JACK_ENABLED
+ifndef LOCAL_JACK_PROGUARD_FLAGS
+    LOCAL_JACK_PROGUARD_FLAGS := $(LOCAL_PROGUARD_FLAGS)
+endif
+LOCAL_JACK_PROGUARD_FLAGS := $(addprefix -include ,$(proguard_options_file)) $(LOCAL_JACK_PROGUARD_FLAGS)
+endif # LOCAL_JACK_ENABLED
+
 ifeq (true,$(EMMA_INSTRUMENT))
 ifndef LOCAL_EMMA_INSTRUMENT
 # No emma for test apks.
@@ -271,6 +282,18 @@
 # they want to use this module's R.java file.
 $(LOCAL_BUILT_MODULE): $(R_file_stamp)
 
+ifdef LOCAL_JACK_ENABLED
+ifneq ($(built_dex_intermediate),)
+$(built_dex_intermediate): $(R_file_stamp)
+endif
+ifneq ($(noshrob_classes_jack),)
+$(noshrob_classes_jack): $(R_file_stamp)
+endif
+ifneq ($(full_classes_jack),)
+$(full_classes_jack): $(R_file_stamp)
+endif
+endif # LOCAL_JACK_ENABLED
+
 ifneq ($(full_classes_jar),)
 # If full_classes_jar is non-empty, we're building sources.
 # If we're building sources, the initial javac step (which
@@ -388,9 +411,13 @@
 $(LOCAL_BUILT_MODULE): PRIVATE_DONT_DELETE_JAR_DIRS := $(LOCAL_DONT_DELETE_JAR_DIRS)
 $(LOCAL_BUILT_MODULE): $(all_res_assets) $(jni_shared_libraries) $(full_android_manifest)
 	@echo "target Package: $(PRIVATE_MODULE) ($@)"
+ifdef LOCAL_JACK_ENABLED
+	$(create-empty-package)
+else
 	$(if $(PRIVATE_SOURCE_ARCHIVE),\
 	  $(call initialize-package-file,$(PRIVATE_SOURCE_ARCHIVE),$@),\
 	  $(create-empty-package))
+endif
 	$(add-assets-to-package)
 ifneq ($(jni_shared_libraries),)
 	$(add-jni-shared-libs-to-package)
@@ -401,6 +428,9 @@
 else
 	$(add-dex-to-package)
 endif
+ifdef LOCAL_JACK_ENABLED
+	$(add-carried-jack-resources)
+endif
 ifdef LOCAL_DEX_PREOPT
 ifneq (nostripping,$(LOCAL_DEX_PREOPT))
 	$(call dexpreopt-remove-classes.dex,$@)
diff --git a/core/pathmap.mk b/core/pathmap.mk
index 137b5d5..badf8bc 100644
--- a/core/pathmap.mk
+++ b/core/pathmap.mk
@@ -43,6 +43,7 @@
     opengl-tests-includes:frameworks/native/opengl/tests/include \
     recovery:bootable/recovery \
     system-core:system/core/include \
+    audio:system/media/audio/include \
     audio-effects:system/media/audio_effects/include \
     audio-utils:system/media/audio_utils/include \
     audio-route:system/media/audio_route/include \
@@ -111,7 +112,6 @@
         v7/cardview \
         v7/mediarouter \
         v7/palette \
-        v7/recyclerview \
         v8/renderscript \
         v13 \
         v17/leanback \
@@ -130,13 +130,15 @@
 #
 FRAMEWORKS_SUPPORT_JAVA_SRC_DIRS := \
 	$(addprefix frameworks/support/,$(FRAMEWORKS_SUPPORT_SUBDIRS)) \
-	$(addprefix frameworks/,$(FRAMEWORKS_MULTIDEX_SUBDIRS))
+	$(addprefix frameworks/,$(FRAMEWORKS_MULTIDEX_SUBDIRS)) \
+	frameworks/support/v7/recyclerview/src
 
 #
 # A list of support library modules.
 #
 FRAMEWORKS_SUPPORT_JAVA_LIBRARIES := \
     $(foreach dir,$(FRAMEWORKS_SUPPORT_SUBDIRS),android-support-$(subst /,-,$(dir))) \
+    android-support-v7-recyclerview \
     android-support-multidex \
     android-support-multidex-instrumentation
 
diff --git a/core/pdk_config.mk b/core/pdk_config.mk
index 838754f..262b50e 100644
--- a/core/pdk_config.mk
+++ b/core/pdk_config.mk
@@ -52,18 +52,20 @@
 # For these dirs, add classes.jar and javalib.jar from the dir to platform.zip
 # all paths under out dir
 PDK_PLATFORM_JAVA_ZIP_JAVA_TARGET_LIB_DIR += \
-	target/common/obj/JAVA_LIBRARIES/android_stubs_current_intermediates \
-	target/common/obj/JAVA_LIBRARIES/core-libart_intermediates \
-	target/common/obj/JAVA_LIBRARIES/core-junit_intermediates \
-	target/common/obj/JAVA_LIBRARIES/ext_intermediates \
-	target/common/obj/JAVA_LIBRARIES/framework_intermediates \
-	target/common/obj/JAVA_LIBRARIES/android.test.runner_intermediates \
-	target/common/obj/JAVA_LIBRARIES/telephony-common_intermediates \
-	target/common/obj/JAVA_LIBRARIES/voip-common_intermediates \
-	target/common/obj/JAVA_LIBRARIES/ims-common_intermediates \
-	target/common/obj/JAVA_LIBRARIES/mms-common_intermediates \
-	target/common/obj/JAVA_LIBRARIES/android-ex-camera2_intermediates \
-	target/common/obj/JAVA_LIBRARIES/android-common_intermediates \
+  target/common/obj/JAVA_LIBRARIES/android.test.runner_intermediates \
+  target/common/obj/JAVA_LIBRARIES/android-common_intermediates \
+  target/common/obj/JAVA_LIBRARIES/android-ex-camera2_intermediates \
+  target/common/obj/JAVA_LIBRARIES/android_stubs_current_intermediates \
+  target/common/obj/JAVA_LIBRARIES/bouncycastle_intermediates \
+  target/common/obj/JAVA_LIBRARIES/conscrypt_intermediates \
+  target/common/obj/JAVA_LIBRARIES/core-libart_intermediates \
+  target/common/obj/JAVA_LIBRARIES/core-junit_intermediates \
+  target/common/obj/JAVA_LIBRARIES/ext_intermediates \
+  target/common/obj/JAVA_LIBRARIES/framework_intermediates \
+  target/common/obj/JAVA_LIBRARIES/ims-common_intermediates \
+  target/common/obj/JAVA_LIBRARIES/okhttp_intermediates \
+  target/common/obj/JAVA_LIBRARIES/telephony-common_intermediates \
+  target/common/obj/JAVA_LIBRARIES/voip-common_intermediates \
 
 # not java libraries
 PDK_PLATFORM_JAVA_ZIP_CONTENTS += \
@@ -76,7 +78,7 @@
 	$(PDK_PLATFORM_JAVA_ZIP_JAVA_HOST_LIB_DIR)
 
 PDK_PLATFORM_JAVA_ZIP_CONTENTS += $(foreach lib_dir,$(PDK_PLATFORM_JAVA_ZIP_JAVA_LIB_DIR),\
-    $(lib_dir)/classes.jar $(lib_dir)/javalib.jar)
+    $(lib_dir)/classes.jack $(lib_dir)/classes.jar $(lib_dir)/javalib.jar)
 
 # check and override java support level
 ifneq ($(TARGET_BUILD_PDK)$(PDK_FUSION_PLATFORM_ZIP),)
diff --git a/core/prebuilt_internal.mk b/core/prebuilt_internal.mk
index f85b0b8..8d03746 100644
--- a/core/prebuilt_internal.mk
+++ b/core/prebuilt_internal.mk
@@ -122,7 +122,7 @@
 endif
 endif
 
-# We need to enclose the above export_includes and built_shared_libraries in
+# We need to enclose the above export_includes and my_built_shared_libraries in
 # "LOCAL_STRIP_MODULE not true" because otherwise the rules are defined in dynamic_binary.mk.
 endif  # LOCAL_STRIP_MODULE not true
 
@@ -302,6 +302,14 @@
 $(built_module) : $(common_javalib_jar)
 endif # TARGET JAVA_LIBRARIES
 
+ifeq ($(LOCAL_MODULE_CLASS),JAVA_LIBRARIES)
+$(intermediates.COMMON)/classes.jack : PRIVATE_JILL_FLAGS:=$(LOCAL_JILL_FLAGS)
+$(intermediates.COMMON)/classes.jack : $(my_src_jar) $(LOCAL_MODULE_MAKEFILE) \
+        $(LOCAL_ADDITIONAL_DEPENDENCIES) $(JILL_JAR) $(JACK_JAR) $(JACK_LAUNCHER_JAR)
+	$(transform-jar-to-jack)
+
+endif # JAVA_LIBRARIES
+
 $(built_module) : $(LOCAL_MODULE_MAKEFILE) $(LOCAL_ADDITIONAL_DEPENDENCIES)
 
 my_prebuilt_src_file :=
diff --git a/core/product.mk b/core/product.mk
index 46fad89..4e8bff1 100644
--- a/core/product.mk
+++ b/core/product.mk
@@ -97,10 +97,13 @@
     PRODUCT_RESTRICT_VENDOR_FILES \
     PRODUCT_VENDOR_KERNEL_HEADERS \
     PRODUCT_BOOT_JARS \
+    PRODUCT_SUPPORTS_BOOT_SIGNER \
+    PRODUCT_SUPPORTS_VBOOT \
     PRODUCT_SUPPORTS_VERITY \
     PRODUCT_OEM_PROPERTIES \
     PRODUCT_SYSTEM_PROPERTY_BLACKLIST \
     PRODUCT_SYSTEM_SERVER_JARS \
+    PRODUCT_VBOOT_SIGNING_KEY \
     PRODUCT_VERITY_SIGNING_KEY \
     PRODUCT_SYSTEM_VERITY_PARTITION \
     PRODUCT_VENDOR_VERITY_PARTITION \
diff --git a/core/proguard_basic_keeps.flags b/core/proguard_basic_keeps.flags
index 4a85db0..6b3715a 100644
--- a/core/proguard_basic_keeps.flags
+++ b/core/proguard_basic_keeps.flags
@@ -58,7 +58,12 @@
 # Don't warn about those in case this app is linking against an older
 # platform version.  We know about them, and they are safe.
 # See proguard-android.txt in the SDK package.
--dontwarn android.support.**
+#
+# DO NOT USE THIS: We figured it's dangerous to blindly ignore all support library warnings.
+# ProGuard may strip members of subclass of unknown super classes, in case an app is linking against
+# LOCAL_SDK_VERSION lower than the support library's LOCAL_SDK_VERSION.
+# See bug/20658265.
+# -dontwarn android.support.**
 
 # Less spammy.
 -dontnote
diff --git a/core/static_java_library.mk b/core/static_java_library.mk
index 02078e0..9b7b46a 100644
--- a/core/static_java_library.mk
+++ b/core/static_java_library.mk
@@ -56,8 +56,20 @@
 ifneq ($(LOCAL_PROGUARD_ENABLED),custom)
   proguard_options_file := $(intermediates.COMMON)/proguard_options
 endif
+
 LOCAL_PROGUARD_FLAGS := $(addprefix -include ,$(proguard_options_file)) $(LOCAL_PROGUARD_FLAGS)
 
+#################################
+include $(BUILD_SYSTEM)/configure_local_jack.mk
+#################################
+
+ifdef LOCAL_JACK_ENABLED
+ifndef LOCAL_JACK_PROGUARD_FLAGS
+    LOCAL_JACK_PROGUARD_FLAGS := $(LOCAL_PROGUARD_FLAGS)
+endif
+LOCAL_JACK_PROGUARD_FLAGS := $(addprefix -include ,$(proguard_options_file)) $(LOCAL_JACK_PROGUARD_FLAGS)
+endif # LOCAL_JACK_ENABLED
+
 endif  # LOCAL_RESOURCE_DIR
 
 all_res_assets := $(all_resources)
@@ -92,7 +104,8 @@
 
 $(R_file_stamp): PRIVATE_MODULE := $(LOCAL_MODULE)
 # add --non-constant-id to prevent inlining constants.
-$(R_file_stamp): PRIVATE_AAPT_FLAGS := $(LOCAL_AAPT_FLAGS) --non-constant-id
+# AAR needs text symbol file R.txt.
+$(R_file_stamp): PRIVATE_AAPT_FLAGS := $(LOCAL_AAPT_FLAGS) --non-constant-id --output-text-symbols $(LOCAL_INTERMEDIATE_SOURCE_DIR)
 $(R_file_stamp): PRIVATE_SOURCE_INTERMEDIATES_DIR := $(LOCAL_INTERMEDIATE_SOURCE_DIR)
 $(R_file_stamp): PRIVATE_ANDROID_MANIFEST := $(full_android_manifest)
 $(R_file_stamp): PRIVATE_RESOURCE_PUBLICS_OUTPUT := $(intermediates.COMMON)/public_resources.xml
@@ -114,9 +127,32 @@
 	$(hide) find $(PRIVATE_SOURCE_INTERMEDIATES_DIR) -name R.java | xargs cat > $@
 
 $(LOCAL_BUILT_MODULE): $(R_file_stamp)
-ifneq ($(full_classes_jar),)
+ifdef LOCAL_JACK_ENABLED
+$(noshrob_classes_jack): $(R_file_stamp)
+$(full_classes_jack): $(R_file_stamp)
+endif # LOCAL_JACK_ENABLED
 $(full_classes_compiled_jar): $(R_file_stamp)
-endif
+
+# Rule to build AAR, archive including classes.jar, resource, etc.
+built_aar := $(intermediates.COMMON)/javalib.aar
+$(built_aar): PRIVATE_MODULE := $(LOCAL_MODULE)
+$(built_aar): PRIVATE_ANDROID_MANIFEST := $(full_android_manifest)
+$(built_aar): PRIVATE_CLASSES_JAR := $(LOCAL_BUILT_MODULE)
+$(built_aar): PRIVATE_RESOURCE_DIR := $(LOCAL_RESOURCE_DIR)
+$(built_aar): PRIVATE_R_TXT := $(LOCAL_INTERMEDIATE_SOURCE_DIR)/R.txt
+$(built_aar) : $(LOCAL_BUILT_MODULE)
+	@echo "target AAR:  $(PRIVATE_MODULE) ($@)"
+	$(hide) rm -rf $(dir $@)aar && mkdir -p $(dir $@)aar/res
+	$(hide) cp $(PRIVATE_ANDROID_MANIFEST) $(dir $@)aar/AndroidManifest.xml
+	$(hide) cp $(PRIVATE_CLASSES_JAR) $(dir $@)aar/classes.jar
+	# Note: Use "cp -n" to honor the resource overlay rules, if multiple res dirs exist.
+	$(hide) $(foreach res,$(PRIVATE_RESOURCE_DIR),cp -Rfn $(res)/* $(dir $@)aar/res;)
+	$(hide) cp $(PRIVATE_R_TXT) $(dir $@)aar/R.txt
+	$(hide) jar -cMf $@ \
+	  -C $(dir $@)aar .
+
+# Register the aar file.
+ALL_MODULES.$(LOCAL_MODULE).AAR := $(built_aar)
 
 endif  # need_compile_res
 
diff --git a/core/tasks/cts.mk b/core/tasks/cts.mk
index 23648f8..668d5bb 100644
--- a/core/tasks/cts.mk
+++ b/core/tasks/cts.mk
@@ -21,7 +21,7 @@
 HOSTTESTLIB_JAR := $(HOST_OUT_JAVA_LIBRARIES)/hosttestlib.jar
 TF_JAR := $(HOST_OUT_JAVA_LIBRARIES)/tradefed-prebuilt.jar
 CTS_TF_JAR := $(HOST_OUT_JAVA_LIBRARIES)/cts-tradefed.jar
-CTS_TF_EXEC_PATH := $(HOST_OUT_EXECUTABLES)/cts-tradefed
+CTS_TF_EXEC_PATH ?= $(HOST_OUT_EXECUTABLES)/cts-tradefed
 CTS_TF_README_PATH := $(cts_tools_src_dir)/tradefed-host/README
 
 VMTESTSTF_INTERMEDIATES :=$(call intermediates-dir-for,JAVA_LIBRARIES,vm-tests-tf,HOST)
@@ -64,8 +64,8 @@
 
 
 CTS_TEST_JAR_LIST := \
-        cts-junit \
-        CtsJdwp
+	cts-junit \
+	CtsJdwp
 
 # Depend on the full package paths rather than the phony targets to avoid
 # rebuilding the packages every time.
@@ -73,24 +73,31 @@
 CTS_TEST_JAR_FILES := $(foreach c,$(CTS_TEST_JAR_LIST),$(call intermediates-dir-for,JAVA_LIBRARIES,$(c))/javalib.jar)
 
 -include cts/CtsTestCaseList.mk
-CTS_CASE_LIST := $(CTS_CORE_CASE_LIST) $(CTS_TEST_CASE_LIST)
 
 # A module may have mutliple installed files (e.g. split apks)
 CTS_CASE_LIST_APKS :=
-CTS_CASE_LIST_APKS_DIR := $(cts_dir)/$(cts_name)/repository/testcases/
-$(foreach m, $(CTS_CASE_LIST),\
+$(foreach m, $(CTS_TEST_CASE_LIST),\
+  $(foreach fp, $(ALL_MODULES.$(m).BUILT_INSTALLED),\
+    $(eval pair := $(subst :,$(space),$(fp)))\
+    $(eval CTS_CASE_LIST_APKS += $(CTS_TESTCASES_OUT)/$(notdir $(word 2,$(pair))))))\
+$(foreach m, $(CTS_CORE_CASE_LIST),\
   $(foreach fp, $(ALL_MODULES.$(m).BUILT_INSTALLED),\
     $(eval pair := $(subst :,$(space),$(fp)))\
     $(eval built := $(word 1,$(pair)))\
-    $(eval installed := $(CTS_CASE_LIST_APKS_DIR)/$(notdir $(word 2,$(pair))))\
+    $(eval installed := $(CTS_TESTCASES_OUT)/$(notdir $(word 2,$(pair))))\
     $(eval $(call copy-one-file, $(built), $(installed)))\
     $(eval CTS_CASE_LIST_APKS += $(installed))))
 
+CTS_CASE_LIST_JARS :=
+$(foreach m, $(CTS_TEST_JAR_LIST),\
+  $(eval CTS_CASE_LIST_JARS += $(CTS_TESTCASES_OUT)/$(m).jar))
+
 CTS_SHARED_LIBS := \
 	$(HOST_LIBRARY_PATH)/libc++$(HOST_SHLIB_SUFFIX)
 
 DEFAULT_TEST_PLAN := $(cts_dir)/$(cts_name)/resource/plans
-$(cts_dir)/all_cts_files_stamp: $(CTS_CORE_CASES) $(CTS_TEST_CASES) $(CTS_CASE_LIST_APKS) $(JUNIT_HOST_JAR) $(HOSTTESTLIB_JAR) $(CTS_HOST_LIBRARY_JARS) $(TF_JAR) $(VMTESTSTF_JAR) $(CTS_TF_JAR) $(CTS_TF_EXEC_PATH) $(CTS_TF_README_PATH) $(ACP) $(CTS_TEST_JAR_FILES) $(CTS_SHARED_LIBS)
+$(cts_dir)/all_cts_files_stamp: $(CTS_CORE_CASES) $(CTS_TEST_JAR_FILES) $(CTS_TEST_CASES) $(CTS_CASE_LIST_APKS) $(CTS_CASE_LIST_JARS) $(JUNIT_HOST_JAR) $(HOSTTESTLIB_JAR) $(CTS_HOST_LIBRARY_JARS) $(TF_JAR) $(VMTESTSTF_JAR) $(CTS_TF_JAR) $(CTS_TF_EXEC_PATH) $(CTS_TF_README_PATH) $(ADDITIONAL_TF_JARS) $(ACP) $(CTS_SHARED_LIBS)
+
 # Make necessary directory for CTS
 	$(hide) mkdir -p $(TMP_DIR)
 	$(hide) mkdir -p $(PRIVATE_DIR)/docs
@@ -98,12 +105,9 @@
 	$(hide) mkdir -p $(PRIVATE_DIR)/repository/testcases
 	$(hide) mkdir -p $(PRIVATE_DIR)/repository/plans
 # Copy executable and JARs to CTS directory
-	$(hide) $(ACP) -fp $(VMTESTSTF_JAR) $(PRIVATE_DIR)/repository/testcases
-	$(hide) $(ACP) -fp $(HOSTTESTLIB_JAR) $(CTS_HOST_LIBRARY_JARS) $(TF_JAR) $(CTS_TF_JAR) $(CTS_TF_EXEC_PATH) $(CTS_TF_README_PATH) $(PRIVATE_DIR)/tools
+	$(hide) $(ACP) -fp $(VMTESTSTF_JAR) $(CTS_TESTCASES_OUT)
+	$(hide) $(ACP) -fp $(HOSTTESTLIB_JAR) $(CTS_HOST_LIBRARY_JARS) $(TF_JAR) $(CTS_TF_JAR) $(CTS_TF_EXEC_PATH) $(ADDITIONAL_TF_JARS) $(CTS_TF_README_PATH) $(PRIVATE_DIR)/tools
 	$(hide) $(call copy-files-with-structure, $(CTS_SHARED_LIBS),$(HOST_OUT)/,$(PRIVATE_DIR))
-# Change mode of the executables
-	$(foreach jar,$(CTS_TEST_JAR_LIST),$(call copy-testcase-jar,$(jar)))
-	$(foreach testcase,$(CTS_TEST_CASES),$(call copy-testcase,$(testcase)))
 	$(hide) touch $@
 
 # Generate the test descriptions for the core-tests
@@ -359,8 +363,7 @@
 # Generate the default test plan for User.
 # Usage: buildCts.py <testRoot> <ctsOutputDir> <tempDir> <androidRootDir> <docletPath>
 
-$(DEFAULT_TEST_PLAN): $(cts_dir)/all_cts_files_stamp $(cts_tools_src_dir)/utils/buildCts.py $(HOST_OUT_JAVA_LIBRARIES)/descGen.jar $(CTS_CORE_XMLS) $(CTS_TEST_XMLS) $(CORE_VM_TEST_TF_DESC) | $(ACP)
-	$(hide) $(ACP) -fp $(CTS_CORE_XMLS) $(CTS_TEST_XMLS) $(CORE_VM_TEST_TF_DESC) $(PRIVATE_DIR)/repository/testcases
+$(DEFAULT_TEST_PLAN): $(cts_dir)/all_cts_files_stamp $(cts_tools_src_dir)/utils/buildCts.py $(HOST_OUT_JAVA_LIBRARIES)/descGen.jar $(CTS_CORE_XMLS) $(CTS_TEST_XMLS) $(CORE_VM_TEST_TF_DESC)
 	$(hide) $(cts_tools_src_dir)/utils/buildCts.py cts/tests/tests/ $(PRIVATE_DIR) $(TMP_DIR) \
 		$(TOP) $(HOST_OUT_JAVA_LIBRARIES)/descGen.jar
 	$(hide) mkdir -p $(dir $@) && touch $@
@@ -382,16 +385,3 @@
 cts: $(INTERNAL_CTS_TARGET) adb
 $(call dist-for-goals,cts,$(INTERNAL_CTS_TARGET))
 
-
-define copy-testcase
-
-$(hide) $(ACP) -fp $(1) $(PRIVATE_DIR)/repository/testcases/$(notdir $1)
-
-endef
-
-define copy-testcase-jar
-
-$(hide) $(ACP) -fp $(call intermediates-dir-for,JAVA_LIBRARIES,$(1))/javalib.jar \
-	$(PRIVATE_DIR)/repository/testcases/$(1).jar
-
-endef
diff --git a/core/tasks/tools/package-modules.mk b/core/tasks/tools/package-modules.mk
index bd9cf57..2af2e20 100644
--- a/core/tasks/tools/package-modules.mk
+++ b/core/tasks/tools/package-modules.mk
@@ -58,5 +58,5 @@
 	$(call copy-tests-in-batch,$(wordlist 1001,1200,$(PRIVATE_COPY_PAIRS)))
 	$(call copy-tests-in-batch,$(wordlist 1201,9999,$(PRIVATE_COPY_PAIRS)))
 	$(hide) $(foreach f, $(PRIVATE_PICKUP_FILES),\
-	  cp -rf $(f) $(dir $@);)
+	  cp -rfL $(f) $(dir $@);)
 	$(hide) cd $(dir $@) && zip -rq $(notdir $@) *
diff --git a/core/tasks/vendor_module_check.mk b/core/tasks/vendor_module_check.mk
index d8e8ec7..efed1e8 100644
--- a/core/tasks/vendor_module_check.mk
+++ b/core/tasks/vendor_module_check.mk
@@ -22,6 +22,7 @@
         broadcom \
         csr \
         elan \
+        fpc \
         google \
         htc \
         imgtec \
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index cc63286..c36d690 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -41,7 +41,7 @@
   # which is the version that we reveal to the end user.
   # Update this value when the platform version changes (rather
   # than overriding it somewhere else).  Can be an arbitrary string.
-  PLATFORM_VERSION := 5.1.1
+  PLATFORM_VERSION := MNC
 endif
 
 ifeq "" "$(PLATFORM_SDK_VERSION)"
@@ -59,7 +59,7 @@
 ifeq "" "$(PLATFORM_VERSION_CODENAME)"
   # This is the current development code-name, if the build is not a final
   # release build.  If this is a final release build, it is simply "REL".
-  PLATFORM_VERSION_CODENAME := REL
+  PLATFORM_VERSION_CODENAME := MNC
 
   # This is all of the development codenames that are active.  Should be either
   # the same as PLATFORM_VERSION_CODENAME or a comma-separated list of additional
diff --git a/envsetup.sh b/envsetup.sh
index bec6993..7efbe39 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -764,7 +764,7 @@
                 MAKEFILE="$MAKEFILE $MFILE"
             else
                 case $DIR in
-                  showcommands | snod | dist | incrementaljavac) ARGS="$ARGS $DIR";;
+                  showcommands | snod | dist | incrementaljavac | *=*) ARGS="$ARGS $DIR";;
                   GET-INSTALL-PATH) GET_INSTALL_PATH=$DIR;;
                   *) echo "No Android.mk in $DIR."; return 1;;
                 esac
@@ -822,7 +822,7 @@
         fi
       else
         case $DIR in
-          showcommands | snod | dist | incrementaljavac) ARGS="$ARGS $DIR";;
+          showcommands | snod | dist | incrementaljavac | *=*) ARGS="$ARGS $DIR";;
           *) echo "Couldn't find directory $DIR"; return 1;;
         esac
       fi
@@ -1108,6 +1108,11 @@
     find . -name .repo -prune -o -name .git -prune -o -path ./out -prune -o -name sepolicy -type d -print0 | xargs -0 grep --color -n -r --exclude-dir=\.git "$@"
 }
 
+function rcgrep()
+{
+    find . -name .repo -prune -o -name .git -prune -o -name out -prune -o -type f -name "*\.rc*" -print0 | xargs -0 grep --color -n "$@"
+}
+
 case `uname -s` in
     Darwin)
         function mgrep()
diff --git a/target/board/generic/BoardConfig.mk b/target/board/generic/BoardConfig.mk
index 393492b..fb6c920 100644
--- a/target/board/generic/BoardConfig.mk
+++ b/target/board/generic/BoardConfig.mk
@@ -68,7 +68,7 @@
 VSYNC_EVENT_PHASE_OFFSET_NS := 0
 
 TARGET_USERIMAGES_USE_EXT4 := true
-BOARD_SYSTEMIMAGE_PARTITION_SIZE := 576716800
+BOARD_SYSTEMIMAGE_PARTITION_SIZE := 786432000
 BOARD_USERDATAIMAGE_PARTITION_SIZE := 576716800
 BOARD_CACHEIMAGE_PARTITION_SIZE := 69206016
 BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE := ext4
diff --git a/target/product/base.mk b/target/product/base.mk
index 85c01a2..15f4c1a 100644
--- a/target/product/base.mk
+++ b/target/product/base.mk
@@ -18,6 +18,7 @@
 PRODUCT_PACKAGES += \
     20-dns.conf \
     95-configured \
+    org.apache.http.legacy.boot \
     appwidget \
     appops \
     am \
@@ -65,12 +66,16 @@
     libnetlink \
     libnetutils \
     libpdfium \
+    libradio \
+    libradioservice \
+    libradio_metadata \
     libreference-ril \
     libreverbwrapper \
     libril \
     librtp_jni \
     libsensorservice \
     libskia \
+    libsonic \
     libsonivox \
     libsoundpool \
     libsoundtrigger \
@@ -107,6 +112,7 @@
     sdcard \
     services \
     settings \
+    sgdisk \
     svc \
     tc \
     vdc \
diff --git a/target/product/core.mk b/target/product/core.mk
index 519dbb8..d453303 100644
--- a/target/product/core.mk
+++ b/target/product/core.mk
@@ -23,7 +23,6 @@
 PRODUCT_PACKAGES += \
     BasicDreams \
     Browser \
-    Calculator \
     Calendar \
     CalendarProvider \
     CaptivePortalLogin \
@@ -33,6 +32,7 @@
     DocumentsUI \
     DownloadProviderUi \
     Email \
+    ExactCalculator \
     Exchange2 \
     ExternalStorageProvider \
     FusedLocation \
diff --git a/target/product/core_minimal.mk b/target/product/core_minimal.mk
index 33b49a6..f455561 100644
--- a/target/product/core_minimal.mk
+++ b/target/product/core_minimal.mk
@@ -30,6 +30,7 @@
     PackageInstaller \
     SettingsProvider \
     Shell \
+    StatementService \
     bcc \
     bu \
     com.android.future.usb.accessory \
@@ -49,6 +50,8 @@
     ip-up-vpn \
     ip6tables \
     iptables \
+    gatekeeperd \
+    gatekeeper.default \
     keystore \
     keystore.default \
     ld.mc \
@@ -60,13 +63,13 @@
     libdrmframework_jni \
     libfilterfw \
     libkeystore \
+    libgatekeeper \
     libsqlite_jni \
     libwilhelm \
     logd \
     make_ext4fs \
     e2fsck \
     resize2fs \
-    mms-common \
     screencap \
     sensorservice \
     telephony-common \
@@ -91,9 +94,8 @@
     telephony-common \
     voip-common \
     ims-common \
-    mms-common \
-    android.policy \
     apache-xml \
+    org.apache.http.legacy.boot
 
 # The order of PRODUCT_SYSTEM_SERVER_JARS matters.
 PRODUCT_SYSTEM_SERVER_JARS := \
diff --git a/target/product/core_tiny.mk b/target/product/core_tiny.mk
index 39789d9..4f8fd7f 100644
--- a/target/product/core_tiny.mk
+++ b/target/product/core_tiny.mk
@@ -54,12 +54,15 @@
     ip-up-vpn \
     ip6tables \
     iptables \
+    gatekeeperd \
+    gatekeeper.default \
     keystore \
     keystore.default \
     libOpenMAXAL \
     libOpenSLES \
     libdownmix \
     libfilterfw \
+    libgatekeeper \
     libkeystore \
     libsqlite_jni \
     libwilhelm \
@@ -76,7 +79,6 @@
     telephony-common \
     voip-common \
     logd \
-    mms-common \
     wifi-service
 
 # The order matters
@@ -91,10 +93,9 @@
     telephony-common \
     voip-common \
     ims-common \
-    mms-common \
-    android.policy \
     apache-xml \
     nullwebview \
+    org.apache.http.legacy.boot
 
 # The order of PRODUCT_SYSTEM_SERVER_JARS matters.
 PRODUCT_SYSTEM_SERVER_JARS := \
@@ -112,6 +113,7 @@
 $(call inherit-product, $(SRC_TARGET_DIR)/product/runtime_libart.mk)
 $(call inherit-product, $(SRC_TARGET_DIR)/product/base.mk)
 $(call inherit-product-if-exists, frameworks/base/data/fonts/fonts.mk)
+$(call inherit-product-if-exists, external/roboto-fonts/fonts.mk)
 
 # Overrides
 PRODUCT_BRAND := tiny
diff --git a/target/product/emulator.mk b/target/product/emulator.mk
index 3a8a4aa..d9ff62e 100644
--- a/target/product/emulator.mk
+++ b/target/product/emulator.mk
@@ -40,11 +40,13 @@
     camera.goldfish.jpeg \
     lights.goldfish \
     gps.goldfish \
+    fingerprint.goldfish \
     sensors.goldfish \
     e2fsck \
     audio.primary.goldfish \
     vibrator.goldfish \
     power.goldfish \
+    fingerprint.ranchu \
     sensors.ranchu
 
 
diff --git a/target/product/generic_no_telephony.mk b/target/product/generic_no_telephony.mk
index dd18fab..f6ccd2a 100644
--- a/target/product/generic_no_telephony.mk
+++ b/target/product/generic_no_telephony.mk
@@ -19,6 +19,7 @@
 
 PRODUCT_PACKAGES := \
     Bluetooth \
+    BluetoothMidiService \
     Camera2 \
     Gallery2 \
     Music \
@@ -60,9 +61,10 @@
 $(call inherit-product-if-exists, external/google-fonts/carrois-gothic-sc/fonts.mk)
 $(call inherit-product-if-exists, external/google-fonts/coming-soon/fonts.mk)
 $(call inherit-product-if-exists, external/google-fonts/cutive-mono/fonts.mk)
-$(call inherit-product-if-exists, external/lohit-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/roboto-fonts/fonts.mk)
+$(call inherit-product-if-exists, external/hyphenation-patterns/patterns.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/target/product/sdk_base.mk b/target/product/sdk_base.mk
index 451c0b7..0fa6e08 100644
--- a/target/product/sdk_base.mk
+++ b/target/product/sdk_base.mk
@@ -83,6 +83,7 @@
 $(call inherit-product-if-exists, external/google-fonts/cutive-mono/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/roboto-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/target/product/telephony.mk b/target/product/telephony.mk
index da1497d..084f86c 100644
--- a/target/product/telephony.mk
+++ b/target/product/telephony.mk
@@ -18,7 +18,9 @@
 # to products that have telephony hardware.
 
 PRODUCT_PACKAGES := \
+    CarrierConfig \
     Dialer \
+    CallLogBackup \
     Mms \
     rild
 
diff --git a/target/product/vboot.mk b/target/product/vboot.mk
new file mode 100644
index 0000000..e4b1144
--- /dev/null
+++ b/target/product/vboot.mk
@@ -0,0 +1,24 @@
+#
+# Copyright (C) 2015 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.
+#
+
+# Provides dependencies necessary for verified boot
+
+PRODUCT_SUPPORTS_VBOOT := true
+
+# The dev key is used to sign boot and recovery images.
+# We expect this file to exist with the suffixes ".vbprivk" and ".vbpupk".
+# TODO: find a proper location for this
+PRODUCT_VBOOT_SIGNING_KEY := external/vboot_reference/tests/devkeys/kernel_data_key
diff --git a/target/product/verity.mk b/target/product/verity.mk
index 0361b64..3e00b49 100644
--- a/target/product/verity.mk
+++ b/target/product/verity.mk
@@ -16,6 +16,7 @@
 
 # Provides dependencies necessary for verified boot
 
+PRODUCT_SUPPORTS_BOOT_SIGNER := true
 PRODUCT_SUPPORTS_VERITY := true
 
 # The dev key is used to sign boot and recovery images, and the verity
diff --git a/tools/droiddoc/templates-pdk/assets/images/android_logo.png b/tools/droiddoc/templates-pdk/assets/images/android_logo.png
new file mode 100644
index 0000000..4040f3f
--- /dev/null
+++ b/tools/droiddoc/templates-pdk/assets/images/android_logo.png
Binary files differ
diff --git a/tools/droiddoc/templates-pdk/components/masthead.cs b/tools/droiddoc/templates-pdk/components/masthead.cs
index 05437f3..874c11c 100644
--- a/tools/droiddoc/templates-pdk/components/masthead.cs
+++ b/tools/droiddoc/templates-pdk/components/masthead.cs
@@ -1,10 +1,9 @@
-<?cs 
+<?cs
 def:custom_masthead() ?>
   <div id="header">
       <div id="headerLeft">
           <a href="<?cs var:toroot ?>guide/index.html"><img
-              src="<?cs var:toroot ?>assets/images/android-partner-logo.png" alt="Android Platform Development Kit" /></a>
-       
+              src="<?cs var:toroot ?>assets/images/android_logo.png" alt="Android Platform Development Kit" /></a>
       </div>
       <div id="headerRight">
           <div id="headerLinks">
diff --git a/tools/droiddoc/templates-sac/assets/css/default.css b/tools/droiddoc/templates-sac/assets/css/default.css
index c1a0c19..ca998f1 100644
--- a/tools/droiddoc/templates-sac/assets/css/default.css
+++ b/tools/droiddoc/templates-sac/assets/css/default.css
@@ -1093,8 +1093,12 @@
 li {
   margin:0 0 5px;
 }
+dt {
+  font-weight:bold;
+}
 dd {
   margin:0 0 10px 30px;
+  padding: 5px;
 }
 dd p,
 dd pre,
diff --git a/tools/java-event-log-tags.py b/tools/java-event-log-tags.py
index 846d9cf..f364751 100755
--- a/tools/java-event-log-tags.py
+++ b/tools/java-event-log-tags.py
@@ -129,7 +129,7 @@
     out += "_"
   return out
 
-javaTypes = ["ERROR", "int", "long", "String", "Object[]"]
+javaTypes = ["ERROR", "int", "long", "String", "Object[]", "float"]
 for t in tagfile.tags:
   methodName = javaName("write_" + t.tagname)
   if t.description:
diff --git a/tools/releasetools/blockimgdiff.py b/tools/releasetools/blockimgdiff.py
index d549f70..544b1d0 100644
--- a/tools/releasetools/blockimgdiff.py
+++ b/tools/releasetools/blockimgdiff.py
@@ -200,7 +200,7 @@
 # original image.
 
 class BlockImageDiff(object):
-  def __init__(self, tgt, src=None, threads=None, version=2):
+  def __init__(self, tgt, src=None, threads=None, version=3):
     if threads is None:
       threads = multiprocessing.cpu_count() // 2
       if threads == 0:
@@ -211,7 +211,7 @@
     self.src_basenames = {}
     self.src_numpatterns = {}
 
-    assert version in (1, 2)
+    assert version in (1, 2, 3)
 
     self.tgt = tgt
     if src is None:
@@ -295,7 +295,15 @@
           next_stash_id += 1
         stashes[s] = sid
         stashed_blocks += sr.size()
-        out.append("stash %d %s\n" % (sid, sr.to_string_raw()))
+        if self.version == 2:
+          out.append("stash %d %s\n" % (sid, sr.to_string_raw()))
+        else:
+          sh = self.HashBlocks(self.src, sr)
+          if sh in stashes:
+            stashes[sh] += 1
+          else:
+            stashes[sh] = 1
+            out.append("stash %s %s\n" % (sh, sr.to_string_raw()))
 
       if stashed_blocks > max_stashed_blocks:
         max_stashed_blocks = stashed_blocks
@@ -321,6 +329,7 @@
           sid = stashes.pop(s)
           stashed_blocks -= sr.size()
           unstashed_src_ranges = unstashed_src_ranges.subtract(sr)
+          sh = self.HashBlocks(self.src, sr)
           sr = xf.src_ranges.map_within(sr)
           mapped_stashes.append(sr)
           if self.version == 2:
@@ -347,7 +356,7 @@
 
         src_str = " ".join(src_str)
 
-      # both versions:
+      # all versions:
       #   zero <rangeset>
       #   new <rangeset>
       #   erase <rangeset>
diff --git a/tools/releasetools/common.py b/tools/releasetools/common.py
index a8b0035..e05ee3c 100644
--- a/tools/releasetools/common.py
+++ b/tools/releasetools/common.py
@@ -52,6 +52,8 @@
     self.java_args = "-Xmx2048m" # JVM Args
     self.public_key_suffix = ".x509.pem"
     self.private_key_suffix = ".pk8"
+    # use otatools built boot_signer by default
+    self.boot_signer_path = "boot_signer"
     self.verbose = False
     self.tempfiles = []
     self.device_specific = None
@@ -360,9 +362,11 @@
   assert p.returncode == 0, "mkbootimg of %s image failed" % (
       os.path.basename(sourcedir),)
 
-  if info_dict.get("verity_key", None):
+  if (info_dict.get("boot_signer", None) == "true" and
+      info_dict.get("verity_key", None)):
     path = "/" + os.path.basename(sourcedir).lower()
-    cmd = ["boot_signer", path, img.name, info_dict["verity_key"] + ".pk8",
+    cmd = [OPTIONS.boot_signer_path, path, img.name,
+           info_dict["verity_key"] + ".pk8",
            info_dict["verity_key"] + ".x509.pem", img.name]
     p = Run(cmd, stdout=subprocess.PIPE)
     p.communicate()
@@ -652,7 +656,8 @@
         argv, "hvp:s:x:" + extra_opts,
         ["help", "verbose", "path=", "signapk_path=", "extra_signapk_args=",
          "java_path=", "java_args=", "public_key_suffix=",
-         "private_key_suffix=", "device_specific=", "extra="] +
+         "private_key_suffix=", "boot_signer_path=", "device_specific=",
+         "extra="] +
         list(extra_long_opts))
   except getopt.GetoptError as err:
     Usage(docstring)
@@ -679,6 +684,8 @@
       OPTIONS.public_key_suffix = a
     elif o in ("--private_key_suffix",):
       OPTIONS.private_key_suffix = a
+    elif o in ("--boot_signer_path",):
+      OPTIONS.boot_signer_path = a
     elif o in ("-s", "--device_specific"):
       OPTIONS.device_specific = a
     elif o in ("-x", "--extra"):
@@ -1217,7 +1224,8 @@
     "mtd": "MTD",
     "ext4": "EMMC",
     "emmc": "EMMC",
-    "f2fs": "EMMC"
+    "f2fs": "EMMC",
+    "squashfs": "EMMC"
 }
 
 def GetTypeAndDevice(mount_point, info):