diff --git a/core/Makefile b/core/Makefile
index 2d7f76d..5c302f6 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -674,7 +674,7 @@
 $(target_notice_file_html_gz): $(target_notice_file_html) | $(MINIGZIP)
 	$(hide) $(MINIGZIP) -9 < $< > $@
 installed_notice_html_gz := $(TARGET_OUT)/etc/NOTICE.html.gz
-$(installed_notice_html_gz): $(target_notice_file_html_gz) | $(ACP)
+$(installed_notice_html_gz): $(target_notice_file_html_gz)
 	$(copy-file-to-target)
 
 # if we've been run my mm, mmm, etc, don't reinstall this every time
@@ -1142,7 +1142,7 @@
 endif
 
 
-$(INSTALLED_SYSTEMIMAGE): $(BUILT_SYSTEMIMAGE) $(RECOVERY_FROM_BOOT_PATCH) | $(ACP)
+$(INSTALLED_SYSTEMIMAGE): $(BUILT_SYSTEMIMAGE) $(RECOVERY_FROM_BOOT_PATCH)
 	@echo "Install system fs image: $@"
 	$(copy-file-to-target)
 	$(hide) $(call assert-max-image-size,$@ $(RECOVERY_FROM_BOOT_PATCH),$(BOARD_SYSTEMIMAGE_PARTITION_SIZE))
diff --git a/core/base_rules.mk b/core/base_rules.mk
index 40e546e..5afec2f 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -56,7 +56,6 @@
   my_module_tags :=
 endif
 
-ifdef BUILDING_WITH_NINJA
 # Ninja has an implicit dependency on the command being run, and kati will
 # regenerate the ninja manifest if any read makefile changes, so there is no
 # need to have dependencies on makefiles.
@@ -64,7 +63,6 @@
 # a .mk file, because a few users of LOCAL_ADDITIONAL_DEPENDENCIES don't include
 # base_rules.mk, but it will fix the most common ones.
 LOCAL_ADDITIONAL_DEPENDENCIES := $(filter-out %.mk,$(LOCAL_ADDITIONAL_DEPENDENCIES))
-endif
 
 ###########################################################
 ## Validate and define fallbacks for input LOCAL_* variables.
@@ -301,26 +299,12 @@
 ## Module installation rule
 ###########################################################
 
-# Some hosts do not have ACP; override the LOCAL version if that's the case.
-ifneq ($(strip $(HOST_ACP_UNAVAILABLE)),)
-  LOCAL_ACP_UNAVAILABLE := $(strip $(HOST_ACP_UNAVAILABLE))
-endif
-
 ifndef LOCAL_UNINSTALLABLE_MODULE
-  # Define a copy rule to install the module.
-  # acp and libraries that it uses can't use acp for
-  # installation;  hence, LOCAL_ACP_UNAVAILABLE.
 $(LOCAL_INSTALLED_MODULE): PRIVATE_POST_INSTALL_CMD := $(LOCAL_POST_INSTALL_CMD)
-ifneq ($(LOCAL_ACP_UNAVAILABLE),true)
-$(LOCAL_INSTALLED_MODULE): $(LOCAL_BUILT_MODULE) | $(ACP)
+$(LOCAL_INSTALLED_MODULE): $(LOCAL_BUILT_MODULE)
 	@echo "Install: $@"
 	$(copy-file-to-new-target)
 	$(PRIVATE_POST_INSTALL_CMD)
-else
-$(LOCAL_INSTALLED_MODULE): $(LOCAL_BUILT_MODULE)
-	@echo "Install: $@"
-	$(copy-file-to-target-with-cp)
-endif
 
 # Rule to install the module's companion init.rc.
 my_init_rc_installed :=
diff --git a/core/binary.mk b/core/binary.mk
index aab1248..54dc474 100644
--- a/core/binary.mk
+++ b/core/binary.mk
@@ -53,7 +53,7 @@
 my_c_includes := $(LOCAL_C_INCLUDES)
 my_generated_sources := $(LOCAL_GENERATED_SOURCES)
 my_native_coverage := $(LOCAL_NATIVE_COVERAGE)
-my_additional_dependencies := $(LOCAL_MODULE_MAKEFILE_DEP) $(LOCAL_ADDITIONAL_DEPENDENCIES)
+my_additional_dependencies := $(LOCAL_ADDITIONAL_DEPENDENCIES)
 my_export_c_include_dirs := $(LOCAL_EXPORT_C_INCLUDE_DIRS)
 
 ifdef LOCAL_IS_HOST_MODULE
@@ -528,7 +528,7 @@
 
 my_gen_sources_copy := $(patsubst $(generated_sources_dir)/%,$(intermediates)/%,$(filter $(generated_sources_dir)/%,$(my_generated_sources)))
 
-$(my_gen_sources_copy): $(intermediates)/% : $(generated_sources_dir)/% | $(ACP)
+$(my_gen_sources_copy): $(intermediates)/% : $(generated_sources_dir)/%
 	@echo "Copy: $@"
 	$(copy-file-to-target)
 
@@ -1143,7 +1143,7 @@
     $(foreach l, $(my_static_libraries) $(my_whole_static_libraries), \
       $(call intermediates-dir-for,STATIC_LIBRARIES,$(l),$(LOCAL_IS_HOST_MODULE),,$(LOCAL_2ND_ARCH_VAR_PREFIX),$(my_host_cross))/export_includes))
 $(import_includes): PRIVATE_IMPORT_EXPORT_INCLUDES := $(import_includes_deps)
-$(import_includes) : $(LOCAL_MODULE_MAKEFILE_DEP) $(import_includes_deps)
+$(import_includes) : $(import_includes_deps)
 	@echo Import includes file: $@
 	$(hide) mkdir -p $(dir $@) && rm -f $@
 ifdef import_includes_deps
@@ -1210,11 +1210,7 @@
 # that custom build rules which generate .o files don't consume other generated
 # sources as input (or if they do they take care of that dependency themselves).
 $(normal_objects) : | $(my_generated_sources)
-ifeq ($(BUILDING_WITH_NINJA),true)
 $(all_objects) : $(import_includes)
-else
-$(all_objects) : | $(import_includes)
-endif
 ALL_C_CPP_ETC_OBJECTS += $(all_objects)
 
 
@@ -1406,7 +1402,7 @@
 # Similarly, the generated DBus headers need to exist before we export their location.
 # People are not going to consume the aidl generated cpp file, but the cpp file is
 # generated after the headers, so this is a convenient way to ensure the headers exist.
-$(export_includes) : $(LOCAL_MODULE_MAKEFILE_DEP) $(proto_generated_headers) $(dbus_generated_headers) $(aidl_gen_cpp)
+$(export_includes) : $(proto_generated_headers) $(dbus_generated_headers) $(aidl_gen_cpp)
 	@echo Export includes file: $< -- $@
 	$(hide) mkdir -p $(dir $@) && rm -f $@.tmp
 ifdef my_export_c_include_dirs
@@ -1416,15 +1412,11 @@
 else
 	$(hide) touch $@.tmp
 endif
-ifeq ($(BUILDING_WITH_NINJA),true)
 	$(hide) if cmp -s $@.tmp $@ ; then \
 	  rm $@.tmp ; \
 	else \
 	  mv $@.tmp $@ ; \
 	fi
-else
-	mv $@.tmp $@ ;
-endif
 
 # Kati adds restat=1 to ninja. GNU make does nothing for this.
 .KATI_RESTAT: $(export_includes)
diff --git a/core/cleanbuild.mk b/core/cleanbuild.mk
index c5b15bc..f61e3f7 100644
--- a/core/cleanbuild.mk
+++ b/core/cleanbuild.mk
@@ -246,14 +246,7 @@
 	$(PRODUCT_OUT)/oem \
 	$(PRODUCT_OUT)/dex_bootjars \
 	$(PRODUCT_OUT)/obj/JAVA_LIBRARIES \
-	$(PRODUCT_OUT)/obj/FAKE \
-	$(PRODUCT_OUT)/obj/EXECUTABLES/adbd_intermediates \
-	$(PRODUCT_OUT)/obj/EXECUTABLES/logd_intermediates \
-	$(PRODUCT_OUT)/obj/STATIC_LIBRARIES/libfs_mgr_intermediates \
-	$(PRODUCT_OUT)/obj/EXECUTABLES/init_intermediates \
-	$(PRODUCT_OUT)/obj/ETC/mac_permissions.xml_intermediates \
-	$(PRODUCT_OUT)/obj/ETC/sepolicy_intermediates \
-	$(PRODUCT_OUT)/obj/ETC/init.environ.rc_intermediates
+	$(PRODUCT_OUT)/obj/FAKE
 
 # The files/dirs to delete during a dataclean, which removes any files
 # in the staging and emulator data partitions.
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 0267321..7304bf8 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -25,7 +25,6 @@
 LOCAL_MANIFEST_PACKAGE_NAME:=
 LOCAL_PACKAGE_SPLITS:=
 LOCAL_REQUIRED_MODULES:=
-LOCAL_ACP_UNAVAILABLE:=
 LOCAL_MODULE_TAGS:=
 LOCAL_SRC_FILES:=
 LOCAL_SRC_FILES_EXCLUDE:=
@@ -208,6 +207,8 @@
 LOCAL_REQUIRED_MODULES_$(TARGET_ARCH):=
 LOCAL_CLANG_$(TARGET_ARCH):=
 LOCAL_PREBUILT_JNI_LIBS_$(TARGET_ARCH):=
+LOCAL_STRIP_MODULE_$(TARGET_ARCH):=
+LOCAL_PACK_MODULE_RELOCATIONS_$(TARGET_ARCH):=
 ifdef TARGET_2ND_ARCH
 LOCAL_SRC_FILES_$(TARGET_2ND_ARCH):=
 LOCAL_SRC_FILES_EXCLUDE_$(TARGET_2ND_ARCH):=
@@ -227,6 +228,8 @@
 LOCAL_REQUIRED_MODULES_$(TARGET_2ND_ARCH):=
 LOCAL_CLANG_$(TARGET_2ND_ARCH):=
 LOCAL_PREBUILT_JNI_LIBS_$(TARGET_2ND_ARCH):=
+LOCAL_STRIP_MODULE_$(TARGET_2ND_ARCH):=
+LOCAL_PACK_MODULE_RELOCATIONS_$(TARGET_2ND_ARCH):=
 endif
 LOCAL_SRC_FILES_$(HOST_ARCH):=
 LOCAL_SRC_FILES_EXCLUDE_$(HOST_ARCH):=
diff --git a/core/combo/arch/x86/sandybridge.mk b/core/combo/arch/x86/sandybridge.mk
index bca5953..830e1db 100644
--- a/core/combo/arch/x86/sandybridge.mk
+++ b/core/combo/arch/x86/sandybridge.mk
@@ -5,13 +5,13 @@
 ARCH_X86_HAVE_SSE4   := true
 ARCH_X86_HAVE_SSE4_1 := true
 ARCH_X86_HAVE_SSE4_2 := true
-ARCH_X86_HAVE_AES_NI := true
-ARCH_X86_HAVE_AVX    := true
+ARCH_X86_HAVE_AES_NI := false
+ARCH_X86_HAVE_AVX    := false
 ARCH_X86_HAVE_POPCNT := true
 ARCH_X86_HAVE_MOVBE  := false
 
 # CFLAGS for this arch
 arch_variant_cflags := \
-	-march=corei7-avx \
+	-march=corei7 \
 	-mfpmath=sse \
 
diff --git a/core/combo/arch/x86_64/sandybridge.mk b/core/combo/arch/x86_64/sandybridge.mk
index 865548c..574ec8a 100644
--- a/core/combo/arch/x86_64/sandybridge.mk
+++ b/core/combo/arch/x86_64/sandybridge.mk
@@ -5,11 +5,11 @@
 ARCH_X86_HAVE_SSE4   := true
 ARCH_X86_HAVE_SSE4_1 := true
 ARCH_X86_HAVE_SSE4_2 := true
-ARCH_X86_HAVE_AES_NI := true
-ARCH_X86_HAVE_AVX    := true
+ARCH_X86_HAVE_AES_NI := false
+ARCH_X86_HAVE_AVX    := false
 ARCH_X86_HAVE_POPCNT := true
 ARCH_X86_HAVE_MOVBE  := false
 
 # CFLAGS for this arch
 arch_variant_cflags := \
-	-march=corei7-avx
+	-march=corei7
diff --git a/core/config.mk b/core/config.mk
index 85a4ca1..523fe9b 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -36,7 +36,6 @@
 export PYTHONDONTWRITEBYTECODE := 1
 
 # Standard source directories.
-SRC_DOCS:= $(TOPDIR)docs
 # TODO: Enforce some kind of layering; only add include paths
 #       when a module links against a particular library.
 # TODO: See if we can remove most of these from the global list.
@@ -51,9 +50,6 @@
 	$(TOPDIR)frameworks/native/opengl/include \
 	$(TOPDIR)frameworks/av/include \
 	$(TOPDIR)frameworks/base/include
-SRC_HOST_HEADERS:=$(TOPDIR)tools/include
-SRC_LIBRARIES:= $(TOPDIR)libs
-SRC_SERVERS:= $(TOPDIR)servers
 SRC_TARGET_DIR := $(TOPDIR)build/target
 SRC_API_DIR := $(TOPDIR)prebuilts/sdk/api
 SRC_SYSTEM_API_DIR := $(TOPDIR)prebuilts/sdk/system-api
@@ -702,7 +698,7 @@
 HOST_GLOBAL_LD_DIRS += -L$(HOST_OUT_INTERMEDIATE_LIBRARIES)
 TARGET_GLOBAL_LD_DIRS += -L$(TARGET_OUT_INTERMEDIATE_LIBRARIES)
 
-HOST_PROJECT_INCLUDES:= $(SRC_HEADERS) $(SRC_HOST_HEADERS) $(HOST_OUT_HEADERS)
+HOST_PROJECT_INCLUDES:= $(SRC_HEADERS) $(HOST_OUT_HEADERS)
 TARGET_PROJECT_INCLUDES:= $(SRC_HEADERS) $(TARGET_OUT_HEADERS) \
 		$(TARGET_DEVICE_KERNEL_HEADERS) $(TARGET_BOARD_KERNEL_HEADERS) \
 		$(TARGET_PRODUCT_KERNEL_HEADERS)
@@ -747,7 +743,7 @@
 HOST_CROSS_GLOBAL_CPPFLAGS += $(COMMON_GLOBAL_CPPFLAGS)
 HOST_CROSS_RELEASE_CPPFLAGS += $(COMMON_RELEASE_CPPFLAGS)
 HOST_CROSS_GLOBAL_LD_DIRS += -L$(HOST_CROSS_OUT_INTERMEDIATE_LIBRARIES)
-HOST_CROSS_PROJECT_INCLUDES:= $(SRC_HEADERS) $(SRC_HOST_HEADERS) $(HOST_CROSS_OUT_HEADERS)
+HOST_CROSS_PROJECT_INCLUDES:= $(SRC_HEADERS) $(HOST_CROSS_OUT_HEADERS)
 HOST_CROSS_GLOBAL_CFLAGS += $(HOST_CROSS_RELEASE_CFLAGS)
 HOST_CROSS_GLOBAL_CPPFLAGS += $(HOST_CROSS_RELEASE_CPPFLAGS)
 
@@ -757,7 +753,7 @@
 $(HOST_CROSS_2ND_ARCH_VAR_PREFIX)HOST_CROSS_GLOBAL_CPPFLAGS += $(COMMON_GLOBAL_CPPFLAGS)
 $(HOST_CROSS_2ND_ARCH_VAR_PREFIX)HOST_CROSS_RELEASE_CPPFLAGS += $(COMMON_RELEASE_CPPFLAGS)
 $(HOST_CROSS_2ND_ARCH_VAR_PREFIX)HOST_CROSS_GLOBAL_LD_DIRS += -L$($(HOST_CROSS_2ND_ARCH_VAR_PREFIX)HOST_CROSS_OUT_INTERMEDIATE_LIBRARIES)
-$(HOST_CROSS_2ND_ARCH_VAR_PREFIX)HOST_CROSS_PROJECT_INCLUDES:= $(SRC_HEADERS) $(SRC_HOST_HEADERS) $($(HOST_CROSS_2ND_ARCH_VAR_PREFIX)HOST_CROSS_OUT_HEADERS)
+$(HOST_CROSS_2ND_ARCH_VAR_PREFIX)HOST_CROSS_PROJECT_INCLUDES:= $(SRC_HEADERS) $($(HOST_CROSS_2ND_ARCH_VAR_PREFIX)HOST_CROSS_OUT_HEADERS)
 $(HOST_CROSS_2ND_ARCH_VAR_PREFIX)HOST_CROSS_GLOBAL_CFLAGS += $($(HOST_CROSS_2ND_ARCH_VAR_PREFIX)HOST_CROSS_RELEASE_CFLAGS)
 $(HOST_CROSS_2ND_ARCH_VAR_PREFIX)HOST_CROSS_GLOBAL_CPPFLAGS += $($(HOST_CROSS_2ND_ARCH_VAR_PREFIX)HOST_CROSS_RELEASE_CPPFLAGS)
 endif
diff --git a/core/definitions.mk b/core/definitions.mk
index c40e6bc..aa5d67d 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -133,7 +133,6 @@
 define my-dir
 $(strip \
   $(eval LOCAL_MODULE_MAKEFILE := $$(lastword $$(MAKEFILE_LIST))) \
-  $(eval LOCAL_MODULE_MAKEFILE_DEP := $(if $(BUILDING_WITH_NINJA),,$$(LOCAL_MODULE_MAKEFILE))) \
   $(if $(filter $(BUILD_SYSTEM)/% $(OUT_DIR)/%,$(LOCAL_MODULE_MAKEFILE)), \
     $(error my-dir must be called before including any other makefile.) \
    , \
@@ -895,15 +894,9 @@
 ###########################################################
 # $(1): the .P file
 # $(2): the main build target
-ifeq ($(BUILDING_WITH_NINJA),true)
 define include-depfile
 $(eval $(2) : .KATI_DEPFILE := $1)
 endef
-else
-define include-depfile
-$(eval -include $1)
-endef
-endif
 
 ###########################################################
 ## Track source files compiled to objects
@@ -2007,6 +2000,38 @@
 $(if $(PRIVATE_JAR_MANIFEST), $(hide) echo unsupported options JAR_MANIFEST in $@; exit 53)
 endef
 
+# Invoke Jack to compile java source just to check it compiles correctly.
+#
+# 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 jack-check-java
+$(hide) rm -f $@
+$(hide) rm -f $@.java-source-list
+$(hide) rm -f $@.java-source-list-uniq
+$(hide) mkdir -p $(dir $@)
+$(if $(PRIVATE_JACK_INCREMENTAL_DIR),$(hide) mkdir -p $(PRIVATE_JACK_INCREMENTAL_DIR))
+$(call dump-words-to-file,$(PRIVATE_JAVA_SOURCES),$@.java-source-list)
+$(hide) if [ -d "$(PRIVATE_SOURCE_INTERMEDIATES_DIR)" ]; then \
+          find $(PRIVATE_SOURCE_INTERMEDIATES_DIR) -name '*.java' >> $@.java-source-list; \
+fi
+$(hide) tr ' ' '\n' < $@.java-source-list \
+    | sort -u > $@.java-source-list-uniq
+$(hide) if [ -s $@.java-source-list-uniq ] ; then \
+	$(call call-jack,$(PRIVATE_JACK_EXTRA_ARGS)) \
+	    $(strip $(PRIVATE_JACK_FLAGS)) \
+	    $(strip $(PRIVATE_JACK_DEBUG_FLAGS)) \
+	    $(addprefix --classpath ,$(strip \
+	        $(call normalize-path-list,$(call reverse-list,$(PRIVATE_STATIC_JACK_LIBRARIES)) $(PRIVATE_BOOTCLASSPATH_JAVA_LIBRARIES) $(PRIVATE_ALL_JACK_LIBRARIES)))) \
+	    -D jack.import.resource.policy=keep-first \
+	    -D jack.import.type.policy=keep-first \
+	    $(if $(PRIVATE_JACK_INCREMENTAL_DIR),--incremental-folder $(PRIVATE_JACK_INCREMENTAL_DIR)) \
+	    @$@.java-source-list-uniq; \
+fi
+touch $@
+endef
+
 define transform-jar-to-jack
 	$(hide) mkdir -p $(dir $@)
 	$(hide) mkdir -p $@.tmpjill.res
@@ -2025,9 +2050,7 @@
 # Moves $1.tmp to $1 if necessary. This is designed to be used with
 # .KATI_RESTAT. For kati, this function doesn't update the timestamp
 # of $1 when $1.tmp is identical to $1 so that ninja won't rebuild
-# targets which depend on $1. For GNU make, this function simply
-# copies $1.tmp to $1.
-ifeq ($(BUILDING_WITH_NINJA),true)
+# targets which depend on $1.
 define commit-change-for-toc
 $(hide) if cmp -s $1.tmp $1 ; then \
  rm $1.tmp ; \
@@ -2035,12 +2058,6 @@
  mv $1.tmp $1 ; \
 fi
 endef
-else
-define commit-change-for-toc
-@# make doesn't support restat. We always update .toc files so the dependents will always be updated too.
-$(hide) mv $1.tmp $1
-endef
-endif
 
 ## Rule to create a table of contents from a .jar file.
 ## Must be called with $(eval).
@@ -2378,7 +2395,7 @@
 # $(1): source file
 # $(2): destination file
 define copy-one-file
-$(2): $(1) | $(ACP)
+$(2): $(1)
 	@echo "Copy: $$@"
 	$$(copy-file-to-target)
 endef
@@ -2399,7 +2416,7 @@
 # $(1): source file
 # $(2): destination file, must end with .xml.
 define copy-xml-file-checked
-$(2): $(1) | $(ACP)
+$(2): $(1)
 	@echo "Copy xml: $$@"
 	$(hide) xmllint $$< >/dev/null  # Don't print the xml file to stdout.
 	$$(copy-file-to-target)
@@ -2414,24 +2431,29 @@
 # Copy a single file from one place to another,
 # preserving permissions and overwriting any existing
 # file.
-# We disable the "-t" option for acp cannot handle
-# high resolution timestamp correctly on file systems like ext4.
-# Therefore copy-file-to-target is the same as copy-file-to-new-target.
+# When we used acp, it could not handle high resolution timestamps
+# on file systems like ext4. Because of that, '-t' option was disabled
+# and copy-file-to-target was identical to copy-file-to-new-target.
+# Keep the behavior until we audit and ensure that switching this back
+# won't break anything.
 define copy-file-to-target
 @mkdir -p $(dir $@)
-$(hide) $(ACP) -fp $< $@
+$(hide) rm -f $@
+$(hide) cp $< $@
 endef
 
 # The same as copy-file-to-target, but use the local
 # cp command instead of acp.
 define copy-file-to-target-with-cp
 @mkdir -p $(dir $@)
-$(hide) cp -fp $< $@
+$(hide) rm -f $@
+$(hide) cp -p $< $@
 endef
 
 # The same as copy-file-to-target, but use the zipalign tool to do so.
 define copy-file-to-target-with-zipalign
 @mkdir -p $(dir $@)
+$(hide) rm -f $@
 $(hide) $(ZIPALIGN) -f 4 $< $@
 endef
 
@@ -2439,6 +2461,7 @@
 # comments (for config files and such).
 define copy-file-to-target-strip-comments
 @mkdir -p $(dir $@)
+$(hide) rm -f $@
 $(hide) sed -e 's/#.*$$//' -e 's/[ \t]*$$//' -e '/^$$/d' < $< > $@
 endef
 
@@ -2446,14 +2469,16 @@
 # the old modification time.
 define copy-file-to-new-target
 @mkdir -p $(dir $@)
-$(hide) $(ACP) -fp $< $@
+$(hide) rm -f $@
+$(hide) cp $< $@
 endef
 
 # The same as copy-file-to-new-target, but use the local
 # cp command instead of acp.
 define copy-file-to-new-target-with-cp
 @mkdir -p $(dir $@)
-$(hide) cp -f $< $@
+$(hide) rm -f $@
+$(hide) cp $< $@
 endef
 
 # Copy a prebuilt file to a target location.
@@ -2582,7 +2607,7 @@
 endef
 define add-radio-file-internal
 INSTALLED_RADIOIMAGE_TARGET += $$(PRODUCT_OUT)/$(2)
-$$(PRODUCT_OUT)/$(2) : $$(LOCAL_PATH)/$(1) | $$(ACP)
+$$(PRODUCT_OUT)/$(2) : $$(LOCAL_PATH)/$(1)
 	$$(transform-prebuilt-to-target)
 endef
 
@@ -2597,7 +2622,7 @@
 define add-radio-file-checked-internal
 INSTALLED_RADIOIMAGE_TARGET += $$(PRODUCT_OUT)/$(2)
 BOARD_INFO_CHECK += $(3):$(LOCAL_PATH)/$(1)
-$$(PRODUCT_OUT)/$(2) : $$(LOCAL_PATH)/$(1) | $$(ACP)
+$$(PRODUCT_OUT)/$(2) : $$(LOCAL_PATH)/$(1)
 	$$(transform-prebuilt-to-target)
 endef
 
diff --git a/core/dex_preopt.mk b/core/dex_preopt.mk
index e0dde01..8c473f7 100644
--- a/core/dex_preopt.mk
+++ b/core/dex_preopt.mk
@@ -35,7 +35,7 @@
 _dbj_jar_no_dex := $(DEXPREOPT_BOOT_JAR_DIR_FULL_PATH)/$(1)_nodex.jar
 _dbj_src_jar := $(call intermediates-dir-for,JAVA_LIBRARIES,$(1),,COMMON)/javalib.jar
 
-$$(_dbj_jar_no_dex) : $$(_dbj_src_jar) | $(ACP)
+$$(_dbj_jar_no_dex) : $$(_dbj_src_jar)
 	$$(call copy-file-to-target)
 ifneq ($(DEX_PREOPT_DEFAULT),nostripping)
 	$$(call dexpreopt-remove-classes.dex,$$@)
diff --git a/core/dex_preopt_odex_install.mk b/core/dex_preopt_odex_install.mk
index 73c8146..c7d9750 100644
--- a/core/dex_preopt_odex_install.mk
+++ b/core/dex_preopt_odex_install.mk
@@ -106,8 +106,7 @@
 # Use pattern rule - we may have multiple installed odex files.
 # Ugly syntax - See the definition get-odex-file-path.
 $(installed_odex) : $(dir $(LOCAL_INSTALLED_MODULE))%$(notdir $(word 1,$(installed_odex))) \
-                  : $(dir $(LOCAL_BUILT_MODULE))%$(notdir $(word 1,$(built_odex))) \
-    | $(ACP)
+                  : $(dir $(LOCAL_BUILT_MODULE))%$(notdir $(word 1,$(built_odex)))
 	@echo "Install: $@"
 	$(copy-file-to-target)
 endif
diff --git a/core/droiddoc.mk b/core/droiddoc.mk
index 1b65611..0f18a58 100644
--- a/core/droiddoc.mk
+++ b/core/droiddoc.mk
@@ -161,7 +161,6 @@
         $(droiddoc) \
         $(html_dir_files) \
         $(full_java_lib_deps) \
-        $(LOCAL_MODULE_MAKEFILE_DEP) \
         $(LOCAL_ADDITIONAL_DEPENDENCIES)
 	@echo Docs droiddoc: $(PRIVATE_OUT_DIR)
 	$(hide) mkdir -p $(dir $@)
diff --git a/core/dynamic_binary.mk b/core/dynamic_binary.mk
index d6f6cc9..7ed5c35 100644
--- a/core/dynamic_binary.mk
+++ b/core/dynamic_binary.mk
@@ -46,7 +46,9 @@
 
 my_pack_module_relocations := false
 ifneq ($(DISABLE_RELOCATION_PACKER),true)
-    my_pack_module_relocations := $(LOCAL_PACK_MODULE_RELOCATIONS)
+    my_pack_module_relocations := $(firstword \
+      $(LOCAL_PACK_MODULE_RELOCATIONS_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) \
+      $(LOCAL_PACK_MODULE_RELOCATIONS))
 endif
 
 ifeq ($(my_pack_module_relocations),)
@@ -67,10 +69,10 @@
 
 ifeq (true,$(my_pack_module_relocations))
 # Pack relocations
-$(relocation_packer_output): $(relocation_packer_input) | $(ACP)
+$(relocation_packer_output): $(relocation_packer_input)
 	$(pack-elf-relocations)
 else
-$(relocation_packer_output): $(relocation_packer_input) | $(ACP)
+$(relocation_packer_output): $(relocation_packer_input)
 	@echo "target Unpacked: $(PRIVATE_MODULE) ($@)"
 	$(copy-file-to-target)
 endif
@@ -85,7 +87,7 @@
 endif
 symbolic_input := $(relocation_packer_output)
 symbolic_output := $(my_unstripped_path)/$(my_installed_module_stem)
-$(symbolic_output) : $(symbolic_input) | $(ACP)
+$(symbolic_output) : $(symbolic_input)
 	@echo "target Symbolic: $(PRIVATE_MODULE) ($@)"
 	$(copy-file-to-target)
 
@@ -110,7 +112,9 @@
 strip_input := $(symbolic_output)
 strip_output := $(LOCAL_BUILT_MODULE)
 
-my_strip_module := $(LOCAL_STRIP_MODULE)
+my_strip_module := $(firstword \
+  $(LOCAL_STRIP_MODULE_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) \
+  $(LOCAL_STRIP_MODULE))
 ifeq ($(my_strip_module),)
   my_strip_module := true
 endif
@@ -144,18 +148,9 @@
 else
 # Don't strip the binary, just copy it.  We can't skip this step
 # because a copy of the binary must appear at LOCAL_BUILT_MODULE.
-#
-# If the binary we're copying is acp or a prerequisite,
-# use cp(1) instead.
-ifneq ($(LOCAL_ACP_UNAVAILABLE),true)
-$(strip_output): $(strip_input) | $(ACP)
-	@echo "target Unstripped: $(PRIVATE_MODULE) ($@)"
-	$(copy-file-to-target)
-else
 $(strip_output): $(strip_input)
 	@echo "target Unstripped: $(PRIVATE_MODULE) ($@)"
-	$(copy-file-to-target-with-cp)
-endif
+	$(copy-file-to-target)
 endif # my_strip_module
 
 $(cleantarget): PRIVATE_CLEAN_FILES += \
diff --git a/core/executable_internal.mk b/core/executable_internal.mk
index 2105f58..febea98 100644
--- a/core/executable_internal.mk
+++ b/core/executable_internal.mk
@@ -70,15 +70,16 @@
 $(linked_module): PRIVATE_TARGET_CRTBEGIN_STATIC_O := $(my_target_crtbegin_static_o)
 $(linked_module): PRIVATE_TARGET_CRTEND_O := $(my_target_crtend_o)
 $(linked_module): PRIVATE_TARGET_OUT_INTERMEDIATE_LIBRARIES := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_OUT_INTERMEDIATE_LIBRARIES)
+$(linked_module): PRIVATE_POST_LINK_CMD := $(LOCAL_POST_LINK_CMD)
 
 ifeq ($(LOCAL_FORCE_STATIC_EXECUTABLE),true)
-$(linked_module): PRIVATE_POST_LINK_CMD := $(LOCAL_POST_LINK_CMD)
 $(linked_module): $(my_target_crtbegin_static_o) $(all_objects) $(all_libraries) $(my_target_crtend_o)
 	$(transform-o-to-static-executable)
 	$(PRIVATE_POST_LINK_CMD)
 else
 $(linked_module): $(my_target_crtbegin_dynamic_o) $(all_objects) $(all_libraries) $(my_target_crtend_o)
 	$(transform-o-to-executable)
+	$(PRIVATE_POST_LINK_CMD)
 endif
 
 endif  # skip_build_from_source
diff --git a/core/executable_prefer_symlink.mk b/core/executable_prefer_symlink.mk
index 931550f..1640b32 100644
--- a/core/executable_prefer_symlink.mk
+++ b/core/executable_prefer_symlink.mk
@@ -42,7 +42,7 @@
 # $(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): $(LOCAL_MODULE_MAKEFILE_DEP)
+$(my_symlink):
 	@echo "Symlink: $@ -> $(PRIVATE_SRC_BINARY_NAME)"
 	@mkdir -p $(dir $@)
 	@rm -rf $@
diff --git a/core/goma.mk b/core/goma.mk
index 6535b3e..982160b 100644
--- a/core/goma.mk
+++ b/core/goma.mk
@@ -16,16 +16,6 @@
 
 # Notice: this works only with Google's Goma build infrastructure.
 ifneq ($(filter-out false,$(USE_GOMA)),)
-  # Check if USE_NINJA is not false because GNU make won't work well
-  # with goma. Note this file is evaluated twice, once by GNU make and
-  # once by kati with USE_NINJA=false. We do this check in the former
-  # pass.
-  ifndef KATI
-    ifeq ($(USE_NINJA),false)
-      $(error USE_GOMA=true is not compatible with USE_NINJA=false)
-    endif
-  endif
-
   # Goma requires a lot of processes and file descriptors.
   ifeq ($(shell echo $$(($$(ulimit -u) < 2500 || $$(ulimit -n) < 16000))),1)
     $(warning Max user processes and/or open files are insufficient)
diff --git a/core/host_dalvik_java_library.mk b/core/host_dalvik_java_library.mk
index c506969..5b8634e 100644
--- a/core/host_dalvik_java_library.mk
+++ b/core/host_dalvik_java_library.mk
@@ -36,6 +36,7 @@
 full_classes_jarjar_jar := $(intermediates.COMMON)/classes-jarjar.jar
 full_classes_jar := $(intermediates.COMMON)/classes.jar
 full_classes_jack := $(intermediates.COMMON)/classes.jack
+jack_check_timestamp := $(intermediates.COMMON)/jack.check.timestamp
 built_dex := $(intermediates.COMMON)/classes.dex
 
 LOCAL_INTERMEDIATE_TARGETS += \
@@ -43,12 +44,17 @@
     $(full_classes_jarjar_jar) \
     $(full_classes_jack) \
     $(full_classes_jar) \
+    $(jack_check_timestamp) \
     $(built_dex)
 
 # See comment in java.mk
 ifndef LOCAL_CHECKED_MODULE
+ifdef LOCAL_JACK_ENABLED
+LOCAL_CHECKED_MODULE := $(jack_check_timestamp)
+else
 LOCAL_CHECKED_MODULE := $(full_classes_compiled_jar)
 endif
+endif
 
 #######################################
 include $(BUILD_SYSTEM)/base_rules.mk
@@ -76,7 +82,6 @@
         $(full_java_lib_deps) \
         $(jar_manifest_file) \
         $(proto_java_sources_file_stamp) \
-        $(LOCAL_MODULE_MAKEFILE_DEP) \
         $(LOCAL_ADDITIONAL_DEPENDENCIES)
 	$(transform-host-java-to-package)
 
@@ -121,16 +126,21 @@
 $(LOCAL_INTERMEDIATE_TARGETS): \
 	PRIVATE_JACK_INCREMENTAL_DIR :=
 endif
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_FLAGS := $(GLOBAL_JAVAC_DEBUG_FLAGS) $(LOCAL_JACK_FLAGS)
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_VERSION := $(LOCAL_JACK_VERSION)
 
+jack_all_deps := $(java_sources) $(java_resource_sources) $(full_jack_deps) \
+        $(jar_manifest_file) $(proto_java_sources_file_stamp) \
+        $(LOCAL_ADDITIONAL_DEPENDENCIES) $(JACK)
 $(built_dex): PRIVATE_CLASSES_JACK := $(full_classes_jack)
-$(built_dex): PRIVATE_JACK_FLAGS := $(GLOBAL_JAVAC_DEBUG_FLAGS) $(LOCAL_JACK_FLAGS)
-$(built_dex): PRIVATE_JACK_VERSION := $(LOCAL_JACK_VERSION)
-$(built_dex): $(java_sources) $(java_resource_sources) $(full_jack_deps) \
-        $(jar_manifest_file) $(proto_java_sources_file_stamp) $(LOCAL_MODULE_MAKEFILE_DEP) \
-        $(LOCAL_ADDITIONAL_DEPENDENCIES) $(JACK) | setup-jack-server
+$(built_dex): $(jack_all_deps) | setup-jack-server
 	@echo Building with Jack: $@
 	$(jack-java-to-dex)
 
+$(jack_check_timestamp): $(jack_all_deps) | setup-jack-server
+	@echo Checking build with Jack: $@
+	$(jack-check-java)
+
 # $(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).
diff --git a/core/host_dalvik_static_java_library.mk b/core/host_dalvik_static_java_library.mk
index e6638be..bdb13b7 100644
--- a/core/host_dalvik_static_java_library.mk
+++ b/core/host_dalvik_static_java_library.mk
@@ -35,8 +35,9 @@
 include $(BUILD_SYSTEM)/host_java_library.mk
 # proguard is not supported
 # *.proto files are not supported
-$(full_classes_jack): PRIVATE_JACK_FLAGS := $(GLOBAL_JAVAC_DEBUG_FLAGS) $(LOCAL_JACK_FLAGS)
-$(full_classes_jack): PRIVATE_JACK_VERSION := $(LOCAL_JACK_VERSION)
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_FLAGS := $(GLOBAL_JAVAC_DEBUG_FLAGS) $(LOCAL_JACK_FLAGS)
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_VERSION := $(LOCAL_JACK_VERSION)
+
 $(full_classes_jack): PRIVATE_JARJAR_RULES := $(LOCAL_JARJAR_RULES)
 $(full_classes_jack): \
 	PRIVATE_JACK_INTERMEDIATES_DIR := $(intermediates.COMMON)/jack-rsc
@@ -48,7 +49,7 @@
 	PRIVATE_JACK_INCREMENTAL_DIR :=
 endif
 $(full_classes_jack): $(java_sources) $(java_resource_sources) $(full_jack_deps) \
-        $(jar_manifest_file) $(layers_file) $(LOCAL_MODULE_MAKEFILE_DEP) \
+        $(jar_manifest_file) $(layers_file) \
         $(LOCAL_ADDITIONAL_DEPENDENCIES) $(LOCAL_JARJAR_RULES) \
         $(JACK) | setup-jack-server
 	@echo Building with Jack: $@
diff --git a/core/host_java_library.mk b/core/host_java_library.mk
index 97079fd..9a13439 100644
--- a/core/host_java_library.mk
+++ b/core/host_java_library.mk
@@ -66,7 +66,6 @@
         $(full_java_lib_deps) \
         $(jar_manifest_file) \
         $(proto_java_sources_file_stamp) \
-        $(LOCAL_MODULE_MAKEFILE_DEP) \
         $(LOCAL_ADDITIONAL_DEPENDENCIES)
 	$(transform-host-java-to-package)
 
diff --git a/core/host_shared_library_internal.mk b/core/host_shared_library_internal.mk
index 272e76f..bfbde21 100644
--- a/core/host_shared_library_internal.mk
+++ b/core/host_shared_library_internal.mk
@@ -44,7 +44,6 @@
 $(LOCAL_BUILT_MODULE): \
         $(all_objects) \
         $(all_libraries) \
-        $(LOCAL_MODULE_MAKEFILE_DEP) \
         $(LOCAL_ADDITIONAL_DEPENDENCIES)
 	$(transform-host-o-to-shared-lib)
 
diff --git a/core/java.mk b/core/java.mk
index 705860b..0ae234a 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -119,6 +119,7 @@
 full_classes_jack := $(intermediates.COMMON)/classes.jack
 # intermediate Jack library without shrink and obfuscation
 noshrob_classes_jack := $(intermediates.COMMON)/classes.noshrob.jack
+jack_check_timestamp := $(intermediates.COMMON)/jack.check.timestamp
 
 LOCAL_INTERMEDIATE_TARGETS += \
     $(full_classes_compiled_jar) \
@@ -129,6 +130,7 @@
     $(built_dex_intermediate) \
     $(full_classes_jack) \
     $(noshrob_classes_jack) \
+    $(jack_check_timestamp) \
     $(built_dex) \
     $(full_classes_stubs_jar)
 
@@ -304,7 +306,6 @@
 
 $(aidl_java_sources): $(intermediates.COMMON)/src/%.java: \
         $(LOCAL_PATH)/%.aidl \
-        $(LOCAL_MODULE_MAKEFILE_DEP) \
         $(LOCAL_ADDITIONAL_DEPENDENCIES) \
         $(AIDL) \
         $(aidl_preprocess_import)
@@ -324,9 +325,13 @@
 # command line.
 ifndef LOCAL_CHECKED_MODULE
 ifdef full_classes_jar
+ifdef LOCAL_JACK_ENABLED
+LOCAL_CHECKED_MODULE := $(jack_check_timestamp)
+else
 LOCAL_CHECKED_MODULE := $(full_classes_compiled_jar)
 endif
 endif
+endif
 
 #######################################
 include $(BUILD_SYSTEM)/base_rules.mk
@@ -413,7 +418,6 @@
         $(layers_file) \
         $(RenderScript_file_stamp) \
         $(proto_java_sources_file_stamp) \
-        $(LOCAL_MODULE_MAKEFILE_DEP) \
         $(LOCAL_ADDITIONAL_DEPENDENCIES)
 	$(transform-java-to-classes.jar)
 
@@ -447,7 +451,7 @@
 	$(transform-classes.jar-to-emma)
 
 else
-$(full_classes_emma_jar): $(full_classes_jarjar_jar) | $(ACP)
+$(full_classes_emma_jar): $(full_classes_jarjar_jar)
 	@echo Copying: $@
 	$(copy-file-to-target)
 endif
@@ -563,11 +567,11 @@
 endif
 $(full_classes_proguard_jar): PRIVATE_EXTRA_INPUT_JAR := $(extra_input_jar)
 $(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) $(PROGUARD)
+$(full_classes_proguard_jar) : $(full_classes_jar) $(extra_input_jar) $(my_support_library_sdk_raise) $(proguard_flag_files) | $(PROGUARD)
 	$(call transform-jar-to-proguard)
 
 else  # LOCAL_PROGUARD_ENABLED not defined
-$(full_classes_proguard_jar) : $(full_classes_jar)
+$(full_classes_proguard_jar) : $(full_classes_jar) | $(ACP)
 	@echo Copying: $@
 	$(hide) $(ACP) -fp $< $@
 
@@ -632,9 +636,13 @@
 ifeq ($(LOCAL_JACK_ENABLED),incremental)
 $(LOCAL_INTERMEDIATE_TARGETS): \
 	PRIVATE_JACK_INCREMENTAL_DIR := $(intermediates.COMMON)/jack-incremental
+$(noshrob_classes_jack): PRIVATE_JACK_INCREMENTAL_DIR := $(intermediates.COMMON)/jack-noshrob-incremental
+$(jack_check_timestamp): PRIVATE_JACK_INCREMENTAL_DIR := $(intermediates.COMMON)/jack-check-incremental
 else
 $(LOCAL_INTERMEDIATE_TARGETS): \
 	PRIVATE_JACK_INCREMENTAL_DIR :=
+$(noshrob_classes_jack): PRIVATE_JACK_INCREMENTAL_DIR :=
+$(jack_check_timestamp): PRIVATE_JACK_INCREMENTAL_DIR :=
 endif
 
 ifdef full_classes_jar
@@ -665,7 +673,11 @@
 jack_all_deps := $(java_sources) $(java_resource_sources) $(full_jack_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_DEP) $(JACK)
+        $(JACK)
+
+$(jack_check_timestamp): $(jack_all_deps)
+	@echo Checking build with Jack: $@
+	$(jack-check-java)
 
 ifeq ($(LOCAL_IS_STATIC_JAVA_LIBRARY),true)
 $(full_classes_jack): $(jack_all_deps) | setup-jack-server
@@ -704,11 +716,6 @@
 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) | setup-jack-server
 	@echo Building with Jack: $@
diff --git a/core/java_common.mk b/core/java_common.mk
index ddf2958..3f0ac64 100644
--- a/core/java_common.mk
+++ b/core/java_common.mk
@@ -4,7 +4,11 @@
 ## Java version
 ###########################################################
 ifeq (,$(LOCAL_JAVA_LANGUAGE_VERSION))
-  LOCAL_JAVA_LANGUAGE_VERSION := 1.7
+  ifeq (,$(LEGACY_USE_JAVA7))
+    LOCAL_JAVA_LANGUAGE_VERSION := 1.8
+  else
+    LOCAL_JAVA_LANGUAGE_VERSION := 1.7
+  endif
 endif
 LOCAL_JAVACFLAGS += -source $(LOCAL_JAVA_LANGUAGE_VERSION) -target $(LOCAL_JAVA_LANGUAGE_VERSION)
 
@@ -42,6 +46,8 @@
 	$(call transform-proto-to-java)
 
 #TODO: protoc should output the dependencies introduced by imports.
+
+ALL_MODULES.$(my_register_name).PROTO_FILES := $(proto_sources_fullpath)
 endif # proto_sources
 
 #########################################
@@ -260,6 +266,9 @@
 ifdef aidl_sources
 ALL_MODULES.$(my_register_name).AIDL_FILES := $(aidl_sources)
 endif
+ifdef renderscript_sources
+ALL_MODULES.$(my_register_name).RS_FILES := $(renderscript_sources_fullpath)
+endif
 endif  # !LOCAL_IS_HOST_MODULE
 
 $(LOCAL_INTERMEDIATE_TARGETS) : PRIVATE_ALL_JAVA_LIBRARIES := $(full_java_libs)
diff --git a/core/java_library.mk b/core/java_library.mk
index 81a4a6a..8edba55 100644
--- a/core/java_library.mk
+++ b/core/java_library.mk
@@ -103,7 +103,7 @@
 ifneq ($(dexpreopt_boot_jar_module),) # boot jar
 # boot jar's rules are defined in dex_preopt.mk
 dexpreopted_boot_jar := $(DEXPREOPT_BOOT_JAR_DIR_FULL_PATH)/$(dexpreopt_boot_jar_module)_nodex.jar
-$(LOCAL_BUILT_MODULE) : $(dexpreopted_boot_jar) | $(ACP)
+$(LOCAL_BUILT_MODULE) : $(dexpreopted_boot_jar)
 	$(call copy-file-to-target)
 
 # For libart boot jars, we don't have .odex files.
@@ -114,7 +114,7 @@
 	@echo "Dexpreopt Jar: $(PRIVATE_MODULE) ($@)"
 	$(call dexpreopt-one-file,$<,$@)
 
-$(LOCAL_BUILT_MODULE) : $(common_javalib.jar) | $(ACP)
+$(LOCAL_BUILT_MODULE) : $(common_javalib.jar)
 	$(call copy-file-to-target)
 ifneq (nostripping,$(LOCAL_DEX_PREOPT))
 	$(call dexpreopt-remove-classes.dex,$@)
@@ -123,7 +123,7 @@
 endif # ! boot jar
 
 else # LOCAL_DEX_PREOPT
-$(LOCAL_BUILT_MODULE) : $(common_javalib.jar) | $(ACP)
+$(LOCAL_BUILT_MODULE) : $(common_javalib.jar)
 	$(call copy-file-to-target)
 
 endif # LOCAL_DEX_PREOPT
diff --git a/core/main.mk b/core/main.mk
index ac71867..85f9117 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -96,22 +96,15 @@
 # and host information.
 include $(BUILD_SYSTEM)/config.mk
 
-relaunch_with_ninja :=
-ifneq ($(USE_NINJA),false)
-ifndef BUILDING_WITH_NINJA
-relaunch_with_ninja := true
-endif
+ifndef KATI
+ifdef USE_NINJA
+$(warning USE_NINJA is ignored. Ninja is always used.)
 endif
 
-ifeq ($(relaunch_with_ninja),true)
 # Mark this is a ninja build.
 $(shell mkdir -p $(OUT_DIR) && touch $(OUT_DIR)/ninja_build)
 include build/core/ninja.mk
-else # !relaunch_with_ninja
-ifndef BUILDING_WITH_NINJA
-# Remove ninja build mark if it exists.
-$(shell rm -f $(OUT_DIR)/ninja_build)
-endif
+else # KATI
 
 # With these files findleaves.py won't be unnecessarily slower even if
 # there is a user creates a copy of $(OUT_DIR).
@@ -1120,4 +1113,4 @@
 .PHONY: nothing
 nothing:
 	@echo Successfully read the makefiles.
-endif # !relaunch_with_ninja
+endif # KATI
diff --git a/core/ninja.mk b/core/ninja.mk
index 2878514..44c3ef3 100644
--- a/core/ninja.mk
+++ b/core/ninja.mk
@@ -27,6 +27,7 @@
 	ECLIPSE-% \
 	PRODUCT-% \
 	boottarball-nodeps \
+	brillo_tests \
 	btnod \
 	build-art% \
 	build_kernel-nodeps \
@@ -116,6 +117,10 @@
 NINJA_ARGS += "-v"
 endif
 
+# Make multiple rules to generate the same target an error instead of
+# proceeding with undefined behavior.
+NINJA_ARGS += -w dupbuild=err
+
 ifdef USE_GOMA
 KATI_MAKEPARALLEL := $(MAKEPARALLEL)
 # Ninja runs remote jobs (i.e., commands which contain gomacc) with
@@ -159,7 +164,8 @@
 KATI_LD := $(CLANG_CXX) $(CLANG_HOST_GLOBAL_LDFLAGS)
 # Build static ckati. Unfortunately Mac OS X doesn't officially support static exectuables.
 ifeq ($(BUILD_OS),linux)
-KATI_LD += -static
+# We need everything in libpthread.a otherwise C++11's threading library will be disabled.
+KATI_LD += -static -Wl,--whole-archive -lpthread -Wl,--no-whole-archive -ldl
 endif
 
 KATI_INTERMEDIATES_PATH := $(HOST_OUT_INTERMEDIATES)/EXECUTABLES/ckati_intermediates
diff --git a/core/package_internal.mk b/core/package_internal.mk
index 097d801..1dff269 100644
--- a/core/package_internal.mk
+++ b/core/package_internal.mk
@@ -304,6 +304,7 @@
 endif
 ifneq ($(full_classes_jack),)
 $(full_classes_jack): $(R_file_stamp)
+$(jack_check_timestamp): $(R_file_stamp)
 endif
 endif # LOCAL_JACK_ENABLED
 
@@ -497,7 +498,7 @@
 	$(sign-package)
 
 # Rules to install the splits
-$(installed_apk_splits) : $(my_module_path)/$(LOCAL_MODULE)_%.apk : $(built_module_path)/package_%.apk | $(ACP)
+$(installed_apk_splits) : $(my_module_path)/$(LOCAL_MODULE)_%.apk : $(built_module_path)/package_%.apk
 	@echo "Install: $@"
 	$(copy-file-to-new-target)
 
diff --git a/core/phony_package.mk b/core/phony_package.mk
index 866b13c..b534335 100644
--- a/core/phony_package.mk
+++ b/core/phony_package.mk
@@ -7,7 +7,7 @@
 
 include $(BUILD_SYSTEM)/base_rules.mk
 
-$(LOCAL_BUILT_MODULE): $(LOCAL_MODULE_MAKEFILE_DEP) $(LOCAL_ADDITIONAL_DEPENDENCIES)
+$(LOCAL_BUILT_MODULE): $(LOCAL_ADDITIONAL_DEPENDENCIES)
 	$(hide) echo "Fake: $@"
 	$(hide) mkdir -p $(dir $@)
 	$(hide) touch $@
diff --git a/core/post_clean.mk b/core/post_clean.mk
index 7fafe4a..f08abff 100644
--- a/core/post_clean.mk
+++ b/core/post_clean.mk
@@ -54,27 +54,30 @@
 current_all_packages_config :=
 
 #######################################################
-# Check if we need to delete obsolete aidl-generated java files.
-# When an aidl file gets deleted (or renamed), the generated java file is obsolete.
-previous_aidl_config := $(TARGET_OUT_COMMON_INTERMEDIATES)/previous_aidl_config.mk
-current_aidl_config := $(TARGET_OUT_COMMON_INTERMEDIATES)/current_aidl_config.mk
+# Check if we need to delete obsolete generated java files.
+# When an aidl/proto/etc file gets deleted (or renamed), the generated java file is obsolete.
+previous_gen_java_config := $(TARGET_OUT_COMMON_INTERMEDIATES)/previous_gen_java_config.mk
+current_gen_java_config := $(TARGET_OUT_COMMON_INTERMEDIATES)/current_gen_java_config.mk
 
-$(shell rm -rf $(current_aidl_config) \
-  && mkdir -p $(dir $(current_aidl_config))\
-  && touch $(current_aidl_config))
--include $(previous_aidl_config)
+$(shell rm -rf $(current_gen_java_config) \
+  && mkdir -p $(dir $(current_gen_java_config))\
+  && touch $(current_gen_java_config))
+-include $(previous_gen_java_config)
 
 intermediates_to_clean :=
-modules_with_aidl_files :=
+modules_with_gen_java_files :=
 $(foreach p, $(ALL_MODULES), \
-  $(if $(ALL_MODULES.$(p).AIDL_FILES),\
-    $(eval modules_with_aidl_files += $(p))\
-    $(shell echo 'AIDL_FILES.$(p) := $(ALL_MODULES.$(p).AIDL_FILES)' >> $(current_aidl_config)))\
-  $(if $(filter-out $(ALL_MODULES.$(p).AIDL_FILES),$(AIDL_FILES.$(p))),\
+  $(eval gs := $(strip $(ALL_MODULES.$(p).AIDL_FILES)\
+                       $(ALL_MODULES.$(p).PROTO_FILES)\
+                       $(ALL_MODULES.$(p).RS_FILES)))\
+  $(if $(gs),\
+    $(eval modules_with_gen_java_files += $(p))\
+    $(shell echo 'GEN_SRC_FILES.$(p) := $(gs)' >> $(current_gen_java_config)))\
+  $(if $(filter-out $(gs),$(GEN_SRC_FILES.$(p))),\
     $(eval intermediates_to_clean += $(ALL_MODULES.$(p).INTERMEDIATE_SOURCE_DIR))))
 intermediates_to_clean := $(strip $(intermediates_to_clean))
 ifdef intermediates_to_clean
-$(info *** Obsolete aidl-generated files detected, clean intermediate files...)
+$(info *** Obsolete generated java files detected, clean intermediate files...)
 $(info *** rm -rf $(intermediates_to_clean))
 $(shell rm -rf $(intermediates_to_clean))
 intermediates_to_clean :=
@@ -82,15 +85,15 @@
 
 # For modules not loaded by the current build (e.g. you are running mm/mmm),
 # we copy the info from the previous bulid.
-$(foreach p, $(filter-out $(ALL_MODULES),$(MODULES_WITH_AIDL_FILES)),\
-  $(shell echo 'AIDL_FILES.$(p) := $(AIDL_FILES.$(p))' >> $(current_aidl_config)))
-MODULES_WITH_AIDL_FILES := $(sort $(MODULES_WITH_AIDL_FILES) $(modules_with_aidl_files))
-$(shell echo 'MODULES_WITH_AIDL_FILES := $(MODULES_WITH_AIDL_FILES)' >> $(current_aidl_config))
+$(foreach p, $(filter-out $(ALL_MODULES),$(MODULES_WITH_GEN_JAVA_FILES)),\
+  $(shell echo 'GEN_SRC_FILES.$(p) := $(GEN_SRC_FILES.$(p))' >> $(current_gen_java_config)))
+MODULES_WITH_GEN_JAVA_FILES := $(sort $(MODULES_WITH_GEN_JAVA_FILES) $(modules_with_gen_java_files))
+$(shell echo 'MODULES_WITH_GEN_JAVA_FILES := $(MODULES_WITH_GEN_JAVA_FILES)' >> $(current_gen_java_config))
 
 # Now current becomes previous.
-$(shell cmp $(current_aidl_config) $(previous_aidl_config) > /dev/null 2>&1 || mv -f $(current_aidl_config) $(previous_aidl_config))
+$(shell cmp $(current_gen_java_config) $(previous_gen_java_config) > /dev/null 2>&1 || mv -f $(current_gen_java_config) $(previous_gen_java_config))
 
-MODULES_WITH_AIDL_FILES :=
-modules_with_aidl_files :=
-previous_aidl_config :=
-current_aidl_config :=
+MODULES_WITH_GEN_JAVA_FILES :=
+modules_with_gen_java_files :=
+previous_gen_java_config :=
+current_gen_java_config :=
diff --git a/core/prebuilt_internal.mk b/core/prebuilt_internal.mk
index 286670b..f9ec7d5 100644
--- a/core/prebuilt_internal.mk
+++ b/core/prebuilt_internal.mk
@@ -38,22 +38,29 @@
   endif
 endif
 
+my_strip_module := $(firstword \
+  $(LOCAL_STRIP_MODULE_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) \
+  $(LOCAL_STRIP_MODULE))
+my_pack_module_relocations := $(firstword \
+  $(LOCAL_PACK_MODULE_RELOCATIONS_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) \
+  $(LOCAL_PACK_MODULE_RELOCATIONS))
+
 ifeq (SHARED_LIBRARIES,$(LOCAL_MODULE_CLASS))
   # Put the built targets of all shared libraries in a common directory
   # to simplify the link line.
   OVERRIDE_BUILT_MODULE_PATH := $($(LOCAL_2ND_ARCH_VAR_PREFIX)$(my_prefix)OUT_INTERMEDIATE_LIBRARIES)
-  ifeq ($(LOCAL_IS_HOST_MODULE)$(LOCAL_STRIP_MODULE),)
+  ifeq ($(LOCAL_IS_HOST_MODULE)$(my_strip_module),)
     # Strip but not try to add debuglink
-    LOCAL_STRIP_MODULE := no_debuglink
+    my_strip_module := no_debuglink
   endif
 
-  ifeq ($(LOCAL_IS_HOST_MODULE)$(LOCAL_PACK_MODULE_RELOCATIONS),)
+  ifeq ($(LOCAL_IS_HOST_MODULE)$(my_pack_module_relocations),)
     # Do not pack relocations by default
-    LOCAL_PACK_MODULE_RELOCATIONS := false
+    my_pack_module_relocations := false
   endif
 
   ifeq ($(DISABLE_RELOCATION_PACKER),true)
-    LOCAL_PACK_MODULE_RELOCATIONS := false
+    my_pack_module_relocations := false
   endif
 endif
 
@@ -75,7 +82,7 @@
 LOCAL_INSTALLED_MODULE_STEM := $(LOCAL_MODULE).apk
 endif
 
-ifneq ($(filter true no_debuglink,$(LOCAL_STRIP_MODULE) $(LOCAL_PACK_MODULE_RELOCATIONS)),)
+ifneq ($(filter true no_debuglink,$(my_strip_module) $(my_pack_module_relocations)),)
   ifdef LOCAL_IS_HOST_MODULE
     $(error Cannot strip/pack host module LOCAL_PATH=$(LOCAL_PATH))
   endif
@@ -85,17 +92,20 @@
   ifneq ($(LOCAL_PREBUILT_STRIP_COMMENTS),)
     $(error Cannot strip/pack scripts LOCAL_PATH=$(LOCAL_PATH))
   endif
+  # Set the arch-specific variables to set up the strip/pack rules.
+  LOCAL_STRIP_MODULE_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH) := $(my_strip_module)
+  LOCAL_PACK_MODULE_RELOCATIONS_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH) := $(my_pack_module_relocations)
   include $(BUILD_SYSTEM)/dynamic_binary.mk
   built_module := $(linked_module)
 
-else  # LOCAL_STRIP_MODULE and LOCAL_PACK_MODULE_RELOCATIONS not true
+else  # my_strip_module and my_pack_module_relocations not true
   include $(BUILD_SYSTEM)/base_rules.mk
   built_module := $(LOCAL_BUILT_MODULE)
 
 ifdef prebuilt_module_is_a_library
 export_includes := $(intermediates)/export_includes
 $(export_includes): PRIVATE_EXPORT_C_INCLUDE_DIRS := $(LOCAL_EXPORT_C_INCLUDE_DIRS)
-$(export_includes) : $(LOCAL_MODULE_MAKEFILE_DEP)
+$(export_includes) :
 	@echo Export includes file: $< -- $@
 	$(hide) mkdir -p $(dir $@) && rm -f $@
 ifdef LOCAL_EXPORT_C_INCLUDE_DIRS
@@ -130,8 +140,8 @@
 endif
 
 # 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
+# "my_strip_module not true" because otherwise the rules are defined in dynamic_binary.mk.
+endif  # my_strip_module not true
 
 ifeq ($(LOCAL_MODULE_CLASS),APPS)
 PACKAGES.$(LOCAL_MODULE).OVERRIDES := $(strip $(LOCAL_OVERRIDES_PACKAGES))
@@ -216,7 +226,7 @@
 endif
 $(built_module): PRIVATE_EMBEDDED_JNI_LIBS := $(embedded_prebuilt_jni_libs)
 
-$(built_module) : $(my_prebuilt_src_file) | $(ACP) $(ZIPALIGN) $(SIGNAPK_JAR) $(AAPT)
+$(built_module) : $(my_prebuilt_src_file) | $(ZIPALIGN) $(SIGNAPK_JAR) $(AAPT)
 	$(transform-prebuilt-to-target)
 	$(uncompress-shared-libs)
 ifneq ($(LOCAL_CERTIFICATE),PRESIGNED)
@@ -255,12 +265,12 @@
 
 $(built_apk_splits) : PRIVATE_PRIVATE_KEY := $(LOCAL_CERTIFICATE).pk8
 $(built_apk_splits) : PRIVATE_CERTIFICATE := $(LOCAL_CERTIFICATE).x509.pem
-$(built_apk_splits) : $(built_module_path)/%.apk : $(my_src_dir)/%.apk | $(ACP) $(AAPT)
+$(built_apk_splits) : $(built_module_path)/%.apk : $(my_src_dir)/%.apk | $(AAPT)
 	$(copy-file-to-new-target)
 	$(sign-package)
 
 # Rules to install the split apks.
-$(installed_apk_splits) : $(my_module_path)/%.apk : $(built_module_path)/%.apk | $(ACP)
+$(installed_apk_splits) : $(my_module_path)/%.apk : $(built_module_path)/%.apk
 	@echo "Install: $@"
 	$(copy-file-to-new-target)
 
@@ -275,18 +285,17 @@
 endif # LOCAL_PACKAGE_SPLITS
 
 else # LOCAL_MODULE_CLASS != APPS
-ifneq ($(LOCAL_PREBUILT_STRIP_COMMENTS),)
+
 $(built_module) : $(my_prebuilt_src_file)
+ifneq ($(LOCAL_PREBUILT_STRIP_COMMENTS),)
 	$(transform-prebuilt-to-target-strip-comments)
 else
-ifneq ($(LOCAL_ACP_UNAVAILABLE),true)
-$(built_module) : $(my_prebuilt_src_file) | $(ACP)
 	$(transform-prebuilt-to-target)
-else
-$(built_module) : $(my_prebuilt_src_file)
-	$(copy-file-to-target-with-cp)
 endif
+ifeq ($(LOCAL_MODULE_CLASS),EXECUTABLES)
+	$(hide) chmod +x $@
 endif
+
 endif # LOCAL_MODULE_CLASS != APPS
 
 ifeq ($(LOCAL_MODULE_CLASS),JAVA_LIBRARIES)
@@ -312,10 +321,10 @@
 	$(hide) touch $@
 
 endif
-$(common_classes_jar) : $(my_src_jar) | $(ACP)
+$(common_classes_jar) : $(my_src_jar)
 	$(transform-prebuilt-to-target)
 
-$(common_javalib_jar) : $(common_classes_jar) | $(ACP)
+$(common_javalib_jar) : $(common_classes_jar)
 	$(transform-prebuilt-to-target)
 
 $(call define-jar-to-toc-rule, $(common_classes_jar))
@@ -330,7 +339,7 @@
 
 # We may be building classes.jack from a host jar for host dalvik Java library.
 $(intermediates.COMMON)/classes.jack : PRIVATE_JACK_FLAGS:=$(LOCAL_JACK_FLAGS)
-$(intermediates.COMMON)/classes.jack : $(my_src_jar) $(LOCAL_MODULE_MAKEFILE_DEP) \
+$(intermediates.COMMON)/classes.jack : $(my_src_jar) \
         $(LOCAL_ADDITIONAL_DEPENDENCIES) $(JACK) | setup-jack-server
 	$(transform-jar-to-jack)
 
@@ -341,6 +350,6 @@
 
 endif # JAVA_LIBRARIES
 
-$(built_module) : $(LOCAL_MODULE_MAKEFILE_DEP) $(LOCAL_ADDITIONAL_DEPENDENCIES)
+$(built_module) : $(LOCAL_ADDITIONAL_DEPENDENCIES)
 
 my_prebuilt_src_file :=
diff --git a/core/shared_library_internal.mk b/core/shared_library_internal.mk
index b9a5e3e..6fec460 100644
--- a/core/shared_library_internal.mk
+++ b/core/shared_library_internal.mk
@@ -76,7 +76,6 @@
         $(all_libraries) \
         $(my_target_crtbegin_so_o) \
         $(my_target_crtend_so_o) \
-        $(LOCAL_MODULE_MAKEFILE_DEP) \
         $(LOCAL_ADDITIONAL_DEPENDENCIES)
 	$(transform-o-to-shared-lib)
 
diff --git a/core/static_java_library.mk b/core/static_java_library.mk
index d956124..8913ee4 100644
--- a/core/static_java_library.mk
+++ b/core/static_java_library.mk
@@ -130,6 +130,7 @@
 ifdef LOCAL_JACK_ENABLED
 $(noshrob_classes_jack): $(R_file_stamp)
 $(full_classes_jack): $(R_file_stamp)
+$(jack_check_timestamp): $(R_file_stamp)
 endif # LOCAL_JACK_ENABLED
 $(full_classes_compiled_jar): $(R_file_stamp)
 
diff --git a/libs/host/Android.mk b/libs/host/Android.mk
index bc25e4b..5e6a291 100644
--- a/libs/host/Android.mk
+++ b/libs/host/Android.mk
@@ -12,10 +12,6 @@
 LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
 LOCAL_CXX_STL := none
 
-# acp uses libhost, so we can't use
-# acp to install libhost.
-LOCAL_ACP_UNAVAILABLE:= true
-
 include $(BUILD_HOST_STATIC_LIBRARY)
 
 # Include toolchain prebuilt modules if they exist.
diff --git a/tools/acp/Android.mk b/tools/acp/Android.mk
index eec9c9d..56aac14 100644
--- a/tools/acp/Android.mk
+++ b/tools/acp/Android.mk
@@ -11,7 +11,6 @@
 
 LOCAL_STATIC_LIBRARIES := libhost
 LOCAL_MODULE := acp
-LOCAL_ACP_UNAVAILABLE := true
 LOCAL_CXX_STL := none
 
 include $(BUILD_HOST_EXECUTABLE)
diff --git a/tools/apicheck/Android.mk b/tools/apicheck/Android.mk
index 1674a17..b547058 100644
--- a/tools/apicheck/Android.mk
+++ b/tools/apicheck/Android.mk
@@ -15,26 +15,15 @@
 ifneq ($(TARGET_BUILD_PDK),true)
 LOCAL_PATH := $(call my-dir)
 
-# We use copy-file-to-new-target so that the installed
-# script file's timestamp is at least as new as the
-# .jar file it wraps.
-
-#TODO(dbort): add a template to do this stuff; share with jx
-
 # the hat script
 # ============================================================
 include $(CLEAR_VARS)
 LOCAL_IS_HOST_MODULE := true
 LOCAL_MODULE_CLASS := EXECUTABLES
 LOCAL_MODULE := apicheck
-
-include $(BUILD_SYSTEM)/base_rules.mk
-
-$(LOCAL_BUILT_MODULE): $(HOST_OUT_JAVA_LIBRARIES)/doclava$(COMMON_JAVA_PACKAGE_SUFFIX)
-$(LOCAL_BUILT_MODULE): $(LOCAL_PATH)/etc/apicheck | $(ACP)
-	@echo "Copy: $(PRIVATE_MODULE) ($@)"
-	$(copy-file-to-new-target)
-	$(hide) chmod 755 $@
+LOCAL_SRC_FILES := etc/apicheck
+LOCAL_REQUIRED_MODULES := doclava
+include $(BUILD_PREBUILT)
 
 # Apicheck is now part of Doclava -- See external/doclava.
 endif
diff --git a/tools/releasetools/edify_generator.py b/tools/releasetools/edify_generator.py
index f57360a..57f8cda 100644
--- a/tools/releasetools/edify_generator.py
+++ b/tools/releasetools/edify_generator.py
@@ -83,11 +83,17 @@
       raise ValueError("must specify an OEM property")
     if not value:
       raise ValueError("must specify the OEM value")
-    cmd = ('file_getprop("/oem/oem.prop", "{name}") == "{value}" || '
-           'abort("This package expects the value \\"{value}\\" for '
-           '\\"{name}\\" on the OEM partition; this has value \\"" + '
-           'file_getprop("/oem/oem.prop", "{name}") + "\\".");').format(
-               name=name, value=value)
+    if common.OPTIONS.oem_no_mount:
+      cmd = ('getprop("{name}") == "{value}" || '
+             'abort("This package expects the value \\"{value}\\" for '
+             '\\"{name}\\"; this has value \\"" + '
+             'getprop("{name}") + "\\".");').format(name=name, value=value)
+    else:
+      cmd = ('file_getprop("/oem/oem.prop", "{name}") == "{value}" || '
+             'abort("This package expects the value \\"{value}\\" for '
+             '\\"{name}\\" on the OEM partition; this has value \\"" + '
+             'file_getprop("/oem/oem.prop", "{name}") + "\\".");').format(
+                 name=name, value=value)
     self.script.append(cmd)
 
   def AssertSomeFingerprint(self, *fp):
diff --git a/tools/releasetools/ota_from_target_files.py b/tools/releasetools/ota_from_target_files.py
index 73f7e33..f51920a 100755
--- a/tools/releasetools/ota_from_target_files.py
+++ b/tools/releasetools/ota_from_target_files.py
@@ -54,6 +54,12 @@
       Use the file to specify the expected OEM-specific properties
       on the OEM partition of the intended device.
 
+  --oem_no_mount
+      For devices with OEM-specific properties but without an OEM partition,
+      do not mount the OEM partition in the updater-script. This should be
+      very rarely used, since it's expected to have a dedicated OEM partition
+      for OEM-specific properties. Only meaningful when -o is specified.
+
   -w  (--wipe_user_data)
       Generate an OTA package that will wipe the user data partition
       when installed.
@@ -144,6 +150,7 @@
 OPTIONS.block_based = False
 OPTIONS.updater_binary = None
 OPTIONS.oem_source = None
+OPTIONS.oem_no_mount = False
 OPTIONS.fallback_to_full = True
 OPTIONS.full_radio = False
 OPTIONS.full_bootloader = False
@@ -526,7 +533,8 @@
   if oem_props is not None and len(oem_props) > 0:
     if OPTIONS.oem_source is None:
       raise common.ExternalError("OEM source required for this build")
-    script.Mount("/oem", recovery_mount_options)
+    if not OPTIONS.oem_no_mount:
+      script.Mount("/oem", recovery_mount_options)
     oem_dict = common.LoadDictionaryFromLines(
         open(OPTIONS.oem_source).readlines())
 
@@ -777,7 +785,8 @@
   if oem_props is not None and len(oem_props) > 0:
     if OPTIONS.oem_source is None:
       raise common.ExternalError("OEM source required for this build")
-    script.Mount("/oem", recovery_mount_options)
+    if not OPTIONS.oem_no_mount:
+      script.Mount("/oem", recovery_mount_options)
     oem_dict = common.LoadDictionaryFromLines(
         open(OPTIONS.oem_source).readlines())
 
@@ -1062,7 +1071,8 @@
   if oem_props is not None and len(oem_props) > 0:
     if OPTIONS.oem_source is None:
       raise common.ExternalError("OEM source required for this build")
-    script.Mount("/oem", recovery_mount_options)
+    if not OPTIONS.oem_no_mount:
+      script.Mount("/oem", recovery_mount_options)
     oem_dict = common.LoadDictionaryFromLines(
         open(OPTIONS.oem_source).readlines())
 
@@ -1821,6 +1831,8 @@
       OPTIONS.wipe_user_data = True
     elif o in ("-o", "--oem_settings"):
       OPTIONS.oem_source = a
+    elif o == "--oem_no_mount":
+      OPTIONS.oem_no_mount = True
     elif o in ("-e", "--extra_script"):
       OPTIONS.extra_script = a
     elif o in ("-a", "--aslr_mode"):
@@ -1879,6 +1891,7 @@
                                  "block",
                                  "binary=",
                                  "oem_settings=",
+                                 "oem_no_mount",
                                  "verify",
                                  "no_fallback_to_full",
                                  "stash_threshold=",