diff --git a/CleanSpec.mk b/CleanSpec.mk
index c764204..dae2b35 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -236,6 +236,9 @@
 # Switching to 32-bit-by-default host multilib build
 $(call add-clean-step, rm -rf $(HOST_OUT_INTERMEDIATES))
 
+# Change ro.zygote for core_64_bit.mk from zygote32_64 to zygote64_32
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/root/default.prop)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/recovery/root/default.prop)
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************
diff --git a/core/64_bit_blacklist.mk b/core/64_bit_blacklist.mk
deleted file mode 100644
index b7420cd..0000000
--- a/core/64_bit_blacklist.mk
+++ /dev/null
@@ -1,16 +0,0 @@
-ifneq ($(TARGET_2ND_ARCH),)
-
-# misc build errors
-_64_bit_directory_blacklist += \
-	device/generic/goldfish/opengl \
-	device/generic/goldfish/camera \
-
-_64_bit_directory_blacklist_pattern := $(addsuffix %,$(_64_bit_directory_blacklist))
-
-define directory_is_64_bit_blacklisted
-$(if $(filter $(_64_bit_directory_blacklist_pattern),$(1)),true)
-endef
-else
-define directory_is_64_bit_blacklisted
-endef
-endif
diff --git a/core/Makefile b/core/Makefile
index 46b23f8..853bd44 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -111,7 +111,14 @@
 
 # The string used to uniquely identify this build;  used by the OTA server.
 ifeq (,$(strip $(BUILD_FINGERPRINT)))
-  BUILD_FINGERPRINT := $(PRODUCT_BRAND)/$(TARGET_PRODUCT)/$(TARGET_DEVICE):$(PLATFORM_VERSION)/$(BUILD_ID)/$(BUILD_NUMBER):$(TARGET_BUILD_VARIANT)/$(BUILD_VERSION_TAGS)
+  ifneq ($(filter eng.%,$(BUILD_NUMBER)),)
+    # Trim down BUILD_FINGERPRINT: the default BUILD_NUMBER makes it easily exceed
+    # the Android system property length limit (PROPERTY_VALUE_MAX=92).
+    BF_BUILD_NUMBER := $(USER)$(shell date +%m%d%H%M)
+  else
+    BF_BUILD_NUMBER := $(BUILD_NUMBER)
+  endif
+  BUILD_FINGERPRINT := $(PRODUCT_BRAND)/$(TARGET_PRODUCT)/$(TARGET_DEVICE):$(PLATFORM_VERSION)/$(BUILD_ID)/$(BF_BUILD_NUMBER):$(TARGET_BUILD_VARIANT)/$(BUILD_VERSION_TAGS)
 endif
 ifneq ($(words $(BUILD_FINGERPRINT)),1)
   $(error BUILD_FINGERPRINT cannot contain spaces: "$(BUILD_FINGERPRINT)")
@@ -1308,7 +1315,7 @@
 
 $(INTERNAL_OTA_PACKAGE_TARGET): $(BUILT_TARGET_FILES_PACKAGE) $(DISTTOOLS)
 	@echo "Package OTA: $@"
-	$(hide) MKBOOTIMG=$(BOARD_CUSTOM_MKBOOTIMG) \
+	$(hide) MKBOOTIMG=$(MKBOOTIMG) \
 	   ./build/tools/releasetools/ota_from_target_files -v \
 	   -p $(HOST_OUT) \
 	   -k $(KEY_CERT_PAIR) \
@@ -1337,7 +1344,7 @@
 
 $(INTERNAL_UPDATE_PACKAGE_TARGET): $(BUILT_TARGET_FILES_PACKAGE) $(DISTTOOLS)
 	@echo "Package: $@"
-	$(hide) MKBOOTIMG=$(BOARD_CUSTOM_MKBOOTIMG) \
+	$(hide) MKBOOTIMG=$(MKBOOTIMG) \
 	   ./build/tools/releasetools/img_from_target_files -v \
 	   -s $(extensions) \
 	   -p $(HOST_OUT) \
diff --git a/core/base_rules.mk b/core/base_rules.mk
index 8b3614a..39904e2 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -403,7 +403,7 @@
 #                 be up-to-date.
 ifdef LOCAL_IS_HOST_MODULE
 ifeq ($(USE_CORE_LIB_BOOTCLASSPATH),true)
-$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH := -bootclasspath $(call java-lib-deps,core-hostdex,$(LOCAL_IS_HOST_MODULE))
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH := -bootclasspath $(call java-lib-deps,core-libart-hostdex,$(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))
@@ -594,8 +594,12 @@
     $(ALL_MODULES.$(my_register_name).CHECKED) $(LOCAL_CHECKED_MODULE)
 ALL_MODULES.$(my_register_name).BUILT := \
     $(ALL_MODULES.$(my_register_name).BUILT) $(LOCAL_BUILT_MODULE)
+ifneq (true,$(LOCAL_UNINSTALLABLE_MODULE))
 ALL_MODULES.$(my_register_name).INSTALLED := \
     $(strip $(ALL_MODULES.$(my_register_name).INSTALLED) $(LOCAL_INSTALLED_MODULE))
+ALL_MODULES.$(my_register_name).BUILT_INSTALLED := \
+    $(strip $(ALL_MODULES.$(my_register_name).BUILT_INSTALLED)$(LOCAL_BUILT_MODULE):$(LOCAL_INSTALLED_MODULE))
+endif
 ifdef LOCAL_PICKUP_FILES
 # Files or directories ready to pick up by the build system
 # when $(LOCAL_BUILT_MODULE) is done.
diff --git a/core/build_id.mk b/core/build_id.mk
index aaf4185..f94b224 100644
--- a/core/build_id.mk
+++ b/core/build_id.mk
@@ -18,6 +18,6 @@
 # (like "CRB01").  It must be a single word, and is
 # capitalized by convention.
 
-BUILD_ID := OPENMASTER
+BUILD_ID := AOSP
 
 DISPLAY_BUILD_NUMBER := true
diff --git a/core/clang/config.mk b/core/clang/config.mk
index e751d79..f50a0cb 100644
--- a/core/clang/config.mk
+++ b/core/clang/config.mk
@@ -24,9 +24,13 @@
 CLANG_CONFIG_EXTRA_CPPFLAGS :=
 CLANG_CONFIG_EXTRA_LDFLAGS :=
 
-CLANG_CONFIG_EXTRA_CFLAGS := \
+CLANG_CONFIG_EXTRA_CFLAGS += \
   -D__compiler_offsetof=__builtin_offsetof
 
+# Help catch common 32/64-bit errors.
+CLANG_CONFIG_EXTRA_CFLAGS += \
+  -Werror=int-conversion
+
 CLANG_CONFIG_UNKNOWN_CFLAGS := \
   -funswitch-loops \
   -fno-tree-sra \
diff --git a/core/cleanbuild.mk b/core/cleanbuild.mk
index 46a312a..8731457 100644
--- a/core/cleanbuild.mk
+++ b/core/cleanbuild.mk
@@ -81,6 +81,28 @@
     $(info Clean step: $(INTERNAL_CLEAN_STEP.$(step))) \
     $(shell $(INTERNAL_CLEAN_STEP.$(step))) \
    )
+
+  # Rewrite the clean step for the second arch.
+  ifdef TARGET_2ND_ARCH
+  # $(1): the clean step cmd
+  # $(2): the prefix to search for
+  # $(3): the prefix to replace with
+  define -cs-rewrite-cleanstep
+  $(if $(filter $(2)/%,$(1)),\
+    $(eval _crs_new_cmd := $(patsubst $(2)/%,$(3)/%,$(1)))\
+    $(info Clean step: $(_crs_new_cmd))\
+    $(shell $(_crs_new_cmd)))
+  endef
+  $(foreach step,$(steps), \
+    $(call -cs-rewrite-cleanstep,$(INTERNAL_CLEAN_STEP.$(step)),$(TARGET_OUT_INTERMEDIATES),$($(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_INTERMEDIATES))\
+    $(call -cs-rewrite-cleanstep,$(INTERNAL_CLEAN_STEP.$(step)),$(TARGET_OUT_SHARED_LIBRARIES),$($(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_SHARED_LIBRARIES))\
+    $(call -cs-rewrite-cleanstep,$(INTERNAL_CLEAN_STEP.$(step)),$(TARGET_OUT_VENDOR_SHARED_LIBRARIES),$($(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_VENDOR_SHARED_LIBRARIES))\
+    $(call -cs-rewrite-cleanstep,$(INTERNAL_CLEAN_STEP.$(step)),$($(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_INTERMEDIATES),$(TARGET_OUT_INTERMEDIATES))\
+    $(call -cs-rewrite-cleanstep,$(INTERNAL_CLEAN_STEP.$(step)),$($(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_SHARED_LIBRARIES),$(TARGET_OUT_SHARED_LIBRARIES))\
+    $(call -cs-rewrite-cleanstep,$(INTERNAL_CLEAN_STEP.$(step)),$($(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_VENDOR_SHARED_LIBRARIES),$(TARGET_OUT_VENDOR_SHARED_LIBRARIES))\
+    )
+  endif
+  _crs_new_cmd :=
   steps :=
 endif
 CURRENT_CLEAN_BUILD_VERSION :=
diff --git a/core/combo/include/arch/freebsd-x86/AndroidConfig.h b/core/combo/include/arch/freebsd-x86/AndroidConfig.h
deleted file mode 100644
index 0734661..0000000
--- a/core/combo/include/arch/freebsd-x86/AndroidConfig.h
+++ /dev/null
@@ -1,363 +0,0 @@
-/*
- * Copyright (C) 2005 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.
- */
-
-/*
- * Android config -- "FreeBSD".  Used for desktop x86 FreeBSD.
- */
-#ifndef _ANDROID_CONFIG_H
-#define _ANDROID_CONFIG_H
-
-/*
- * make sure we are building for FreeBSD
- */
-#ifndef OS_FREEBSD
-#define OS_FREEBSD
-#endif
-/*
- * ===========================================================================
- *                              !!! IMPORTANT !!!
- * ===========================================================================
- *
- * This file is included by ALL C/C++ source files.  Don't put anything in
- * here unless you are absolutely certain it can't go anywhere else.
- *
- * Any C++ stuff must be wrapped with "#ifdef __cplusplus".  Do not use "//"
- * comments.
- */
-
-/*
- * Threading model.  Choose one:
- *
- * HAVE_PTHREADS - use the pthreads library.
- * HAVE_WIN32_THREADS - use Win32 thread primitives.
- *  -- combine HAVE_CREATETHREAD, HAVE_CREATEMUTEX, and HAVE__BEGINTHREADEX
- */
-#define HAVE_PTHREADS
-
-/*
- * Do we have the futex syscall?
- */
-/* #define HAVE_FUTEX */
-
-/*
- * Process creation model.  Choose one:
- *
- * HAVE_FORKEXEC - use fork() and exec()
- * HAVE_WIN32_PROC - use CreateProcess()
- */
-#define HAVE_FORKEXEC
-
-/*
- * Process out-of-memory adjustment.  Set if running on Linux,
- * where we can write to /proc/<pid>/oom_adj to modify the out-of-memory
- * badness adjustment.
- */
-/* #define HAVE_OOM_ADJ */
-
-/*
- * IPC model.  Choose one:
- *
- * HAVE_SYSV_IPC - use the classic SysV IPC mechanisms (semget, shmget).
- * HAVE_MACOSX_IPC - use Macintosh IPC mechanisms (sem_open, mmap).
- * HAVE_WIN32_IPC - use Win32 IPC (CreateSemaphore, CreateFileMapping).
- * HAVE_ANDROID_IPC - use Android versions (?, mmap).
- */
-#define HAVE_SYSV_IPC
-
-/*
- * Memory-mapping model. Choose one:
- *
- * HAVE_POSIX_FILEMAP - use the Posix sys/mmap.h
- * HAVE_WIN32_FILEMAP - use Win32 filemaps
- */
-#define  HAVE_POSIX_FILEMAP
-
-/*
- * Define this if you have <termio.h>
- */
-/* #define  HAVE_TERMIO_H */
-
-/*
- * Define this if you have <sys/sendfile.h>
- */
-/* #define  HAVE_SYS_SENDFILE_H 1 */
-
-/*
- * Define this if you build against MSVCRT.DLL
- */
-/* #define HAVE_MS_C_RUNTIME */
-
-/*
- * Define this if you have sys/uio.h
- */
-#define  HAVE_SYS_UIO_H
-
-/*
- * Define this if your platforms implements symbolic links
- * in its filesystems
- */
-#define HAVE_SYMLINKS
-
-/*
- * Define this if we have localtime_r().
- */
-#define HAVE_LOCALTIME_R 1
-
-/*
- * Define this if we have gethostbyname_r().
- */
-/* #define HAVE_GETHOSTBYNAME_R */
-
-/*
- * Define this if we have ioctl().
- */
-#define HAVE_IOCTL
-
-/*
- * Define this if we want to use WinSock.
- */
-/* #define HAVE_WINSOCK */
-
-/*
- * Define this if have clock_gettime() and friends
- *
- * Desktop Linux has this in librt, but it's broken in goobuntu, yielding
- * mildly or wildly inaccurate results.
- */
-#define HAVE_POSIX_CLOCKS
-
-/*
- * Define this if we have linux style epoll()
- */
-/* #define HAVE_EPOLL */
-
-/*
- * Endianness of the target machine.  Choose one:
- *
- * HAVE_ENDIAN_H -- have endian.h header we can include.
- * HAVE_LITTLE_ENDIAN -- we are little endian.
- * HAVE_BIG_ENDIAN -- we are big endian.
- */
-/* #define HAVE_ENDIAN_H */
-#define HAVE_LITTLE_ENDIAN
-
-/*
- * Define this if you have sys/endian.h
- * NOTE: mutually exclusive with HAVE_ENDIAN_H
- */
-#define HAVE_SYS_ENDIAN_H
-
-/*
- * We need to choose between 32-bit and 64-bit off_t.  All of our code should
- * agree on the same size.  For desktop systems, use 64-bit values,
- * because some of our libraries (e.g. wxWidgets) expect to be built that way.
- */
-#define _FILE_OFFSET_BITS 64
-#define _LARGEFILE_SOURCE 1
-
-/*
- * Define if platform has off64_t (and lseek64 and other xxx64 functions)
- */
-/* #define HAVE_OFF64_T */
-
-/*
- * Defined if we have the backtrace() call for retrieving a stack trace.
- * Needed for CallStack to operate; if not defined, CallStack is
- * non-functional.
- */
-#define HAVE_BACKTRACE 0
-
-/*
- * Defined if we have the cxxabi.h header for demangling C++ symbols.  If
- * not defined, stack crawls will be displayed with raw mangled symbols
- */
-#define HAVE_CXXABI 0
-
-/*
- * Defined if we have the gettid() system call.
- */
-/* #define HAVE_GETTID */
-
-/* 
- * Defined if we have the sched_setscheduler() call
- */
-#define HAVE_SCHED_SETSCHEDULER
-
-/*
- * Add any extra platform-specific defines here.
- */
-
-/*
- * Define if we have <malloc.h> header
- */
-#define HAVE_MALLOC_H
-
-/*
- * Define if we have Linux-style non-filesystem Unix Domain Sockets
- */
-
-/*
- * What CPU architecture does this platform use?
- */
-#define ARCH_X86
-
-
-/*
- * Define if we have Linux's inotify in <sys/inotify.h>.
- */
-/*#define HAVE_INOTIFY 1*/
-
-/*
- * Define if we have madvise() in <sys/mman.h>
- */
-#define HAVE_MADVISE 1
-
-/*
- * Define if tm struct has tm_gmtoff field
- */
-#define HAVE_TM_GMTOFF 1
-
-/*
- * Define if dirent struct has d_type field
- */
-#define HAVE_DIRENT_D_TYPE 1
-
-/*
- * Define if libc includes Android system properties implementation.
- */
-/* #define HAVE_LIBC_SYSTEM_PROPERTIES */
-
-/*
- * Define if system provides a system property server (should be
- * mutually exclusive with HAVE_LIBC_SYSTEM_PROPERTIES).
- */
-#define HAVE_SYSTEM_PROPERTY_SERVER
-
-/*
- * sprintf() format string for shared library naming.
- */
-#define OS_SHARED_LIB_FORMAT_STR    "lib%s.so"
-
-/*
- * type for the third argument to mincore().
- */
-#define MINCORE_POINTER_TYPE char *
-
-/*
- * Do we have the sigaction flag SA_NOCLDWAIT?
- */
-#define HAVE_SA_NOCLDWAIT
-
-/*
- * Define if we include <sys/mount.h> for statfs()
- */
-#define INCLUDE_SYS_MOUNT_FOR_STATFS 1
-  
-/*
- * The default path separator for the platform
- */
-#define OS_PATH_SEPARATOR '/'
-
-/*
- * Is the filesystem case sensitive?
- */
-#define OS_CASE_SENSITIVE
-
-/*
- * Define if <sys/socket.h> exists.
- */
-#define HAVE_SYS_SOCKET_H 1
-
-/*
- * Define if the strlcpy() function exists on the system.
- */
-#define HAVE_STRLCPY 1
-
-/*
- * Define if the open_memstream() function exists on the system.
- */
-/* #define HAVE_OPEN_MEMSTREAM 1 */
-
-/*
- * Define if the BSD funopen() function exists on the system.
- */
-#define HAVE_FUNOPEN 1
-
-/*
- * Define if prctl() exists
- */
-/* #define HAVE_PRCTL 1 */
-
-/*
- * Define if writev() exists
- */
-#define HAVE_WRITEV 1
-
-/*
- * Define if <alloca.h> does not exist
- * NOTE: <alloca.h> defines alloca() which
- *   on FreeBSD is defined in <stdlib.h>
- */
-#define HAVE_NO_ALLOCA_H
-
-/*
- * Defines CLOCK_PROCESS_CPUTIME_ID for clock_gettime()
- * XXX: CLOCK_PROF seems to be commonly used replacement
- */
-#ifndef  CLOCK_PROCESS_CPUTIME_ID
-#define CLOCK_PROCESS_CPUTIME_ID CLOCK_PROF
-#endif
-
-/*
- * Define if <stdint.h> exists.
- */
-/* #define HAVE_STDINT_H */
-
-/*
- * Define if <stdbool.h> exists.
- */
-/* #define HAVE_STDBOOL_H */
-
-/*
- * Define if <sched.h> exists.
- */
-#define HAVE_SCHED_H 1
-
-/*
- * Define if pread() exists
- */
-#define HAVE_PREAD 1
-/*
- * Define if we have st_mtim in struct stat
- */
-#define HAVE_STAT_ST_MTIM 1
-
-/*
- * Define if printf() supports %zd for size_t arguments
- */
-#define HAVE_PRINTF_ZD 1
-
-/*
- * Define to 1 if <stdlib.h> provides qsort_r() with a BSD style function prototype.
- */
-#define HAVE_BSD_QSORT_R 1
-
-/*
- * Define to 1 if <stdlib.h> provides qsort_r() with a GNU style function prototype.
- */
-#define HAVE_GNU_QSORT_R 0
-
-#endif /*_ANDROID_CONFIG_H*/
diff --git a/core/combo/include/arch/linux-arm/AndroidConfig.h b/core/combo/include/arch/linux-arm/AndroidConfig.h
index 9253e7c..0eb6c72 100644
--- a/core/combo/include/arch/linux-arm/AndroidConfig.h
+++ b/core/combo/include/arch/linux-arm/AndroidConfig.h
@@ -55,12 +55,6 @@
 #define HAVE_FUTEX
 
 /*
- * Define if we already have the futex wrapper functions defined. Yes if
- * compiling against bionic.
- */
-#define HAVE_FUTEX_WRAPPERS 1
-
-/*
  * Process creation model.  Choose one:
  *
  * HAVE_FORKEXEC - use fork() and exec()
@@ -264,21 +258,11 @@
 #define OS_SHARED_LIB_FORMAT_STR    "lib%s.so"
 
 /*
- * Do we have __memcmp16()?
- */
-#define HAVE__MEMCMP16  1
-
-/*
  * type for the third argument to mincore().
  */
 #define MINCORE_POINTER_TYPE unsigned char *
 
 /*
- * Do we have the sigaction flag SA_NOCLDWAIT?
- */
-#define HAVE_SA_NOCLDWAIT
-
-/*
  * The default path separator for the platform
  */
 #define OS_PATH_SEPARATOR '/'
diff --git a/core/combo/include/arch/linux-arm64/AndroidConfig.h b/core/combo/include/arch/linux-arm64/AndroidConfig.h
index 6f85555..bcbda8f 100644
--- a/core/combo/include/arch/linux-arm64/AndroidConfig.h
+++ b/core/combo/include/arch/linux-arm64/AndroidConfig.h
@@ -55,12 +55,6 @@
 #define HAVE_FUTEX
 
 /*
- * Define if we already have the futex wrapper functions defined. Yes if
- * compiling against bionic.
- */
-#define HAVE_FUTEX_WRAPPERS 1
-
-/*
  * Process creation model.  Choose one:
  *
  * HAVE_FORKEXEC - use fork() and exec()
@@ -259,21 +253,11 @@
 #define OS_SHARED_LIB_FORMAT_STR    "lib%s.so"
 
 /*
- * Do we have __memcmp16()?
- */
-#define HAVE__MEMCMP16  1
-
-/*
  * type for the third argument to mincore().
  */
 #define MINCORE_POINTER_TYPE unsigned char *
 
 /*
- * Do we have the sigaction flag SA_NOCLDWAIT?
- */
-#define HAVE_SA_NOCLDWAIT
-
-/*
  * The default path separator for the platform
  */
 #define OS_PATH_SEPARATOR '/'
diff --git a/core/combo/include/arch/linux-mips/AndroidConfig.h b/core/combo/include/arch/linux-mips/AndroidConfig.h
index 2758153..076d711 100644
--- a/core/combo/include/arch/linux-mips/AndroidConfig.h
+++ b/core/combo/include/arch/linux-mips/AndroidConfig.h
@@ -55,12 +55,6 @@
 #define HAVE_FUTEX
 
 /*
- * Define if we already have the futex wrapper functions defined. Yes if
- * compiling against bionic.
- */
-#define HAVE_FUTEX_WRAPPERS 1
-
-/*
  * Process creation model.  Choose one:
  *
  * HAVE_FORKEXEC - use fork() and exec()
@@ -281,21 +275,11 @@
 #define OS_SHARED_LIB_FORMAT_STR    "lib%s.so"
 
 /*
- * Do we have __memcmp16()?
- */
-#define HAVE__MEMCMP16  1
-
-/*
  * type for the third argument to mincore().
  */
 #define MINCORE_POINTER_TYPE unsigned char *
 
 /*
- * Do we have the sigaction flag SA_NOCLDWAIT?
- */
-#define HAVE_SA_NOCLDWAIT
-
-/*
  * The default path separator for the platform
  */
 #define OS_PATH_SEPARATOR '/'
diff --git a/core/combo/include/arch/linux-mips64/AndroidConfig.h b/core/combo/include/arch/linux-mips64/AndroidConfig.h
index bfc0351..7ded3ce 100644
--- a/core/combo/include/arch/linux-mips64/AndroidConfig.h
+++ b/core/combo/include/arch/linux-mips64/AndroidConfig.h
@@ -55,12 +55,6 @@
 #define HAVE_FUTEX
 
 /*
- * Define if we already have the futex wrapper functions defined. Yes if
- * compiling against bionic.
- */
-#define HAVE_FUTEX_WRAPPERS 1
-
-/*
  * Process creation model.  Choose one:
  *
  * HAVE_FORKEXEC - use fork() and exec()
@@ -271,21 +265,11 @@
 #define OS_SHARED_LIB_FORMAT_STR    "lib%s.so"
 
 /*
- * Do we have __memcmp16()?
- */
-#define HAVE__MEMCMP16  1
-
-/*
  * type for the third argument to mincore().
  */
 #define MINCORE_POINTER_TYPE unsigned char *
 
 /*
- * Do we have the sigaction flag SA_NOCLDWAIT?
- */
-#define HAVE_SA_NOCLDWAIT
-
-/*
  * The default path separator for the platform
  */
 #define OS_PATH_SEPARATOR '/'
diff --git a/core/combo/include/arch/linux-ppc/AndroidConfig.h b/core/combo/include/arch/linux-ppc/AndroidConfig.h
deleted file mode 100644
index e6f9489..0000000
--- a/core/combo/include/arch/linux-ppc/AndroidConfig.h
+++ /dev/null
@@ -1,323 +0,0 @@
-/*
- * Copyright (C) 2010 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.
- */
-
-/*
- * Android config -- "Linux".  Used for desktop ppc Linux.
- */
-#ifndef _ANDROID_CONFIG_H
-#define _ANDROID_CONFIG_H
-
-/*
- * ===========================================================================
- *                              !!! IMPORTANT !!!
- * ===========================================================================
- *
- * This file is included by ALL C/C++ source files.  Don't put anything in
- * here unless you are absolutely certain it can't go anywhere else.
- *
- * Any C++ stuff must be wrapped with "#ifdef __cplusplus".  Do not use "//"
- * comments.
- */
-
-/*
- * Threading model.  Choose one:
- *
- * HAVE_PTHREADS - use the pthreads library.
- * HAVE_WIN32_THREADS - use Win32 thread primitives.
- *  -- combine HAVE_CREATETHREAD, HAVE_CREATEMUTEX, and HAVE__BEGINTHREADEX
- */
-#define HAVE_PTHREADS
-
-/*
- * Do we have the futex syscall?
- */
-
-#define HAVE_FUTEX
-
-/*
- * Process creation model.  Choose one:
- *
- * HAVE_FORKEXEC - use fork() and exec()
- * HAVE_WIN32_PROC - use CreateProcess()
- */
-#define HAVE_FORKEXEC
-
-/*
- * Process out-of-memory adjustment.  Set if running on Linux,
- * where we can write to /proc/<pid>/oom_adj to modify the out-of-memory
- * badness adjustment.
- */
-#define HAVE_OOM_ADJ
-
-/*
- * IPC model.  Choose one:
- *
- * HAVE_SYSV_IPC - use the classic SysV IPC mechanisms (semget, shmget).
- * HAVE_MACOSX_IPC - use Macintosh IPC mechanisms (sem_open, mmap).
- * HAVE_WIN32_IPC - use Win32 IPC (CreateSemaphore, CreateFileMapping).
- * HAVE_ANDROID_IPC - use Android versions (?, mmap).
- */
-#define HAVE_SYSV_IPC
-
-/*
- * Memory-mapping model. Choose one:
- *
- * HAVE_POSIX_FILEMAP - use the Posix sys/mmap.h
- * HAVE_WIN32_FILEMAP - use Win32 filemaps
- */
-#define  HAVE_POSIX_FILEMAP
-
-/*
- * Define this if you have <termio.h>
- */
-#define  HAVE_TERMIO_H 1
-
-/*
- * Define this if you have <sys/sendfile.h>
- */
-#define  HAVE_SYS_SENDFILE_H 1
-
-/*
- * Define this if you build against MSVCRT.DLL
- */
-/* #define HAVE_MS_C_RUNTIME */
-
-/*
- * Define this if you have sys/uio.h
- */
-#define  HAVE_SYS_UIO_H 1
-
-/*
- * Define this if your platforms implements symbolic links
- * in its filesystems
- */
-#define HAVE_SYMLINKS
-
-/*
- * Define this if we have localtime_r().
- */
-#define HAVE_LOCALTIME_R 1
-
-/*
- * Define this if we have gethostbyname_r().
- */
-#define HAVE_GETHOSTBYNAME_R
-
-/*
- * Define this if we have ioctl().
- */
-#define HAVE_IOCTL
-
-/*
- * Define this if we want to use WinSock.
- */
-/* #define HAVE_WINSOCK */
-
-/*
- * Define this if have clock_gettime() and friends
- *
- * Desktop Linux has this in librt, but it's broken in goobuntu, yielding
- * mildly or wildly inaccurate results.
- */
-/*#define HAVE_POSIX_CLOCKS*/
-
-/*
- * Define this if we have linux style epoll()
- */
-#define HAVE_EPOLL
-
-/*
- * Endianness of the target machine.  Choose one:
- *
- * HAVE_ENDIAN_H -- have endian.h header we can include.
- * HAVE_LITTLE_ENDIAN -- we are little endian.
- * HAVE_BIG_ENDIAN -- we are big endian.
- */
-#define HAVE_ENDIAN_H
-#define HAVE_BIG_ENDIAN
-
-/*
- * We need to choose between 32-bit and 64-bit off_t.  All of our code should
- * agree on the same size.  For desktop systems, use 64-bit values,
- * because some of our libraries (e.g. wxWidgets) expect to be built that way.
- */
-#define _FILE_OFFSET_BITS 64
-#define _LARGEFILE_SOURCE 1
-
-/*
- * Define if platform has off64_t (and lseek64 and other xxx64 functions)
- */
-#define HAVE_OFF64_T
-
-/*
- * Defined if we have the backtrace() call for retrieving a stack trace.
- * Needed for CallStack to operate; if not defined, CallStack is
- * non-functional.
- */
-#define HAVE_BACKTRACE 1
-
-/*
- * Defined if we have the cxxabi.h header for demangling C++ symbols.  If
- * not defined, stack crawls will be displayed with raw mangled symbols
- */
-#define HAVE_CXXABI 0
-
-/*
- * Defined if we have the gettid() system call.
- */
-/* #define HAVE_GETTID */
-
-/*
- * Defined if we have the sched_setscheduler() call
- */
-#define HAVE_SCHED_SETSCHEDULER
-
-/*
- * Add any extra platform-specific defines here.
- */
-
-/*
- * Define if we have <malloc.h> header
- */
-#define HAVE_MALLOC_H
-
-/*
- * Define if we have Linux-style non-filesystem Unix Domain Sockets
- */
-
-/*
- * What CPU architecture does this platform use?
- */
-#define ARCH_PPC
-
-
-/*
- * Define if we have Linux's inotify in <sys/inotify.h>.
- */
-/*#define HAVE_INOTIFY 1*/
-
-/*
- * Define if we have madvise() in <sys/mman.h>
- */
-#define HAVE_MADVISE 1
-
-/*
- * Define if tm struct has tm_gmtoff field
- */
-#define HAVE_TM_GMTOFF 1
-
-/*
- * Define if dirent struct has d_type field
- */
-#define HAVE_DIRENT_D_TYPE 1
-
-/*
- * Define if libc includes Android system properties implementation.
- */
-/* #define HAVE_LIBC_SYSTEM_PROPERTIES */
-
-/*
- * Define if system provides a system property server (should be
- * mutually exclusive with HAVE_LIBC_SYSTEM_PROPERTIES).
- */
-#define HAVE_SYSTEM_PROPERTY_SERVER
-
-/*
- * sprintf() format string for shared library naming.
- */
-#define OS_SHARED_LIB_FORMAT_STR    "lib%s.so"
-
-/*
- * type for the third argument to mincore().
- */
-#define MINCORE_POINTER_TYPE unsigned char *
-
-/*
- * Do we have the sigaction flag SA_NOCLDWAIT?
- */
-#define HAVE_SA_NOCLDWAIT
-
-/*
- * The default path separator for the platform
- */
-#define OS_PATH_SEPARATOR '/'
-
-/*
- * Is the filesystem case sensitive?
- */
-#define OS_CASE_SENSITIVE
-
-/*
- * Define if <sys/socket.h> exists.
- */
-#define HAVE_SYS_SOCKET_H 1
-
-/*
- * Define if the strlcpy() function exists on the system.
- */
-/* #define HAVE_STRLCPY 1 */
-
-/*
- * Define if the open_memstream() function exists on the system.
- */
-#define HAVE_OPEN_MEMSTREAM 1
-
-/*
- * Define if the BSD funopen() function exists on the system.
- */
-/* #define HAVE_FUNOPEN 1 */
-
-/*
- * Define if prctl() exists
- */
-#define HAVE_PRCTL 1
-
-/*
- * Define if writev() exists
- */
-#define HAVE_WRITEV 1
-
-/*
- * Define if <stdint.h> exists.
- */
-#define HAVE_STDINT_H 1
-
-/*
- * Define if <stdbool.h> exists.
- */
-#define HAVE_STDBOOL_H 1
-
-/*
- * Define if <sched.h> exists.
- */
-#define HAVE_SCHED_H 1
-
-/*
- * Define if pread() exists
- */
-#define HAVE_PREAD 1
-
-/*
- * Define to 1 if <stdlib.h> provides qsort_r() with a BSD style function prototype.
- */
-#define HAVE_BSD_QSORT_R 0
-
-/*
- * Define to 1 if <stdlib.h> provides qsort_r() with a GNU style function prototype.
- */
-#define HAVE_GNU_QSORT_R 1
-
-#endif /*_ANDROID_CONFIG_H*/
diff --git a/core/combo/include/arch/linux-x86/AndroidConfig.h b/core/combo/include/arch/linux-x86/AndroidConfig.h
index 0740186..ebb95b0 100644
--- a/core/combo/include/arch/linux-x86/AndroidConfig.h
+++ b/core/combo/include/arch/linux-x86/AndroidConfig.h
@@ -243,11 +243,6 @@
 #define MINCORE_POINTER_TYPE unsigned char *
 
 /*
- * Do we have the sigaction flag SA_NOCLDWAIT?
- */
-#define HAVE_SA_NOCLDWAIT
-
-/*
  * The default path separator for the platform
  */
 #define OS_PATH_SEPARATOR '/'
diff --git a/core/combo/include/arch/target_linux-x86/AndroidConfig.h b/core/combo/include/arch/target_linux-x86/AndroidConfig.h
index f55134a..5b56b51 100644
--- a/core/combo/include/arch/target_linux-x86/AndroidConfig.h
+++ b/core/combo/include/arch/target_linux-x86/AndroidConfig.h
@@ -41,12 +41,6 @@
 #define HAVE_FUTEX
 
 /*
- * Define if we already have the futex wrapper functions defined. Yes if
- * compiling against bionic.
- */
-#define HAVE_FUTEX_WRAPPERS 1
-
-/*
  * Process creation model.  Choose one:
  *
  * HAVE_FORKEXEC - use fork() and exec()
@@ -253,21 +247,11 @@
 #define OS_SHARED_LIB_FORMAT_STR    "lib%s.so"
 
 /*
- * Do we have __memcmp16()?
- */
-/* #define HAVE__MEMCMP16  1 */
-
-/*
  * type for the third argument to mincore().
  */
 #define MINCORE_POINTER_TYPE unsigned char *
 
 /*
- * Do we have the sigaction flag SA_NOCLDWAIT?
- */
-#define HAVE_SA_NOCLDWAIT
-
-/*
  * The default path separator for the platform
  */
 #define OS_PATH_SEPARATOR '/'
diff --git a/core/config.mk b/core/config.mk
index 47d01ea..0ecb5c5 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -255,7 +255,7 @@
 #
 # Note that this assumes that the 2ND_CPU_ABI for a 64 bit target
 # is always 32 bits. If this isn't the case, these variables should
-# be overriden in the boarc configuration.
+# be overriden in the board configuration.
 ifeq (,$(TARGET_CPU_ABI_LIST_64_BIT))
   ifeq (true|true,$(TARGET_IS_64_BIT)|$(TARGET_SUPPORTS_64_BIT_APPS))
     TARGET_CPU_ABI_LIST_64_BIT := $(TARGET_CPU_ABI) $(TARGET_CPU_ABI2)
@@ -523,7 +523,7 @@
 
 # allow overriding default Java libraries on a per-target basis
 ifeq ($(TARGET_DEFAULT_JAVA_LIBRARIES),)
-  TARGET_DEFAULT_JAVA_LIBRARIES := core core-junit ext framework framework2
+  TARGET_DEFAULT_JAVA_LIBRARIES := core-libart core-junit ext framework framework2
 endif
 
 TARGET_CPU_SMP ?= true
diff --git a/core/definitions.mk b/core/definitions.mk
index 9260345..c2c8823 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -424,7 +424,7 @@
     $(if $(_idfName),, \
         $(error $(LOCAL_PATH): Name not defined in call to intermediates-dir-for)) \
     $(eval _idfPrefix := $(if $(strip $(3)),HOST,TARGET)) \
-    $(eval _idf2ndArchPrefix := $(if $(call directory_is_64_bit_blacklisted,$(LOCAL_PATH))$(strip $(5)),$(TARGET_2ND_ARCH_VAR_PREFIX))) \
+    $(eval _idf2ndArchPrefix := $(if $(strip $(5)),$(TARGET_2ND_ARCH_VAR_PREFIX))) \
     $(if $(filter $(_idfPrefix)-$(_idfClass),$(COMMON_MODULE_CLASSES))$(4), \
         $(eval _idfIntBase := $($(_idfPrefix)_OUT_COMMON_INTERMEDIATES)) \
       ,$(if $(filter $(_idfClass),SHARED_LIBRARIES STATIC_LIBRARIES EXECUTABLES GYP),\
diff --git a/core/dex_preopt_odex_install.mk b/core/dex_preopt_odex_install.mk
index 713f595..caaa16d 100644
--- a/core/dex_preopt_odex_install.mk
+++ b/core/dex_preopt_odex_install.mk
@@ -33,12 +33,14 @@
 
 built_odex :=
 installed_odex :=
+built_installed_odex :=
 ifdef LOCAL_DEX_PREOPT
 dexpreopt_boot_jar_module := $(filter $(DEXPREOPT_BOOT_JARS_MODULES),$(LOCAL_MODULE))
 ifdef dexpreopt_boot_jar_module
 ifeq ($(DALVIK_VM_LIB),libdvm.so)
 built_odex := $(basename $(LOCAL_BUILT_MODULE)).odex
 installed_odex := $(basename $(LOCAL_INSTALLED_MODULE)).odex
+built_installed_odex := $(built_odex):$(installed_odex)
 else # libdvm.so
 # For libart, the boot jars' odex files are replaced by $(DEFAULT_DEX_PREOPT_INSTALLED_IMAGE).
 # We use this installed_odex trick to get boot.art installed.
@@ -50,6 +52,7 @@
 ifeq ($(DALVIK_VM_LIB),libdvm.so)
 built_odex := $(basename $(LOCAL_BUILT_MODULE)).odex
 installed_odex := $(basename $(LOCAL_INSTALLED_MODULE)).odex
+built_installed_odex := $(built_odex):$(installed_odex)
 
 $(built_odex) : $(DEXPREOPT_ONE_FILE_DEPENDENCY_BUILT_BOOT_PREOPT) \
                 $(DEXPREOPT_ONE_FILE_DEPENDENCY_TOOLS)
@@ -72,7 +75,7 @@
                 $(DEXPREOPT_ONE_FILE_DEPENDENCY_TOOLS) \
                 $(my_dex_preopt_image_filename)
 installed_odex := $(call get-odex-file-path,$(DEX2OAT_TARGET_ARCH),$(LOCAL_INSTALLED_MODULE))
-
+built_installed_odex := $(built_odex):$(installed_odex)
 # #################################################
 # Odex for the 2nd arch
 ifdef TARGET_2ND_ARCH
@@ -90,8 +93,10 @@
                  $(DEXPREOPT_ONE_FILE_DEPENDENCY_TOOLS) \
                  $(my_dex_preopt_image_filename)
 
+installed_odex2 := $(call get-odex-file-path,$($(TARGET_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_ARCH),$(LOCAL_INSTALLED_MODULE))
 built_odex += $(built_odex2)
-installed_odex += $(call get-odex-file-path,$($(TARGET_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_ARCH),$(LOCAL_INSTALLED_MODULE))
+installed_odex += $(installed_odex2)
+built_installed_odex += $(built_odex2):$(installed_odex2)
 endif  # TARGET_2ND_ARCH
 # #################################################
 else  # must be APPS
@@ -110,6 +115,7 @@
                 $(DEXPREOPT_ONE_FILE_DEPENDENCY_TOOLS) \
                 $(my_dex_preopt_image_filename)
 installed_odex := $(call get-odex-file-path,$($(LOCAL_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_ARCH),$(LOCAL_INSTALLED_MODULE))
+built_installed_odex := $(built_odex):$(installed_odex)
 endif  # LOCAL_MODULE_CLASS
 endif # libart
 endif # boot jar
@@ -125,7 +131,9 @@
 endif
 
 # Add the installed_odex to the list of installed files for this module.
-ALL_MODULES.$(LOCAL_MODULE).INSTALLED += $(installed_odex)
+ALL_MODULES.$(my_register_name).INSTALLED += $(installed_odex)
+ALL_MODULES.$(my_register_name).BUILT_INSTALLED += $(built_installed_odex)
+
 # Make sure to install the .odex when you run "make <module_name>"
 $(my_register_name): $(installed_odex)
 
diff --git a/core/droiddoc.mk b/core/droiddoc.mk
index d5ddf08..90ef0b3 100644
--- a/core/droiddoc.mk
+++ b/core/droiddoc.mk
@@ -65,8 +65,8 @@
     $(full_target): PRIVATE_BOOTCLASSPATH := $(call java-lib-files, sdk_v$(LOCAL_SDK_VERSION))
   endif
 else
-  LOCAL_JAVA_LIBRARIES := core ext framework framework2 $(LOCAL_JAVA_LIBRARIES)
-  $(full_target): PRIVATE_BOOTCLASSPATH := $(call java-lib-files, core)
+  LOCAL_JAVA_LIBRARIES := core-libart ext framework framework2 $(LOCAL_JAVA_LIBRARIES)
+  $(full_target): PRIVATE_BOOTCLASSPATH := $(call java-lib-files, core-libart)
 endif  # LOCAL_SDK_VERSION
 LOCAL_JAVA_LIBRARIES := $(sort $(LOCAL_JAVA_LIBRARIES))
 
diff --git a/core/host_dalvik_java_library.mk b/core/host_dalvik_java_library.mk
index a79d64d..e15bde2 100644
--- a/core/host_dalvik_java_library.mk
+++ b/core/host_dalvik_java_library.mk
@@ -27,7 +27,7 @@
 #######################################
 
 ifneq ($(LOCAL_NO_STANDARD_LIBRARIES),true)
-  LOCAL_JAVA_LIBRARIES +=  core-hostdex
+  LOCAL_JAVA_LIBRARIES +=  core-libart-hostdex
 endif
 
 full_classes_compiled_jar := $(intermediates.COMMON)/classes-full-debug.jar
diff --git a/core/host_dalvik_static_java_library.mk b/core/host_dalvik_static_java_library.mk
index 05c4b16..3ae74e4 100644
--- a/core/host_dalvik_static_java_library.mk
+++ b/core/host_dalvik_static_java_library.mk
@@ -21,7 +21,7 @@
 #
 
 USE_CORE_LIB_BOOTCLASSPATH := true
-LOCAL_JAVA_LIBRARIES += core-hostdex
+LOCAL_JAVA_LIBRARIES += core-libart-hostdex
 
 include $(BUILD_SYSTEM)/host_java_library.mk
 
diff --git a/core/main.mk b/core/main.mk
index 15b4cbc..9f341b9 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -92,8 +92,6 @@
 # and host information.
 include $(BUILD_SYSTEM)/config.mk
 
-include $(BUILD_SYSTEM)/64_bit_blacklist.mk
-
 # This allows us to force a clean build - included after the config.mk
 # environment setup is done, but before we generate any dependencies.  This
 # file does the rm -rf inline so the deps which are all done below will
diff --git a/core/module_arch_supported.mk b/core/module_arch_supported.mk
index 15fd648..a5e4a7c 100644
--- a/core/module_arch_supported.mk
+++ b/core/module_arch_supported.mk
@@ -28,8 +28,6 @@
 my_module_arch_supported := false
 else ifeq ($($(my_prefix)IS_64_BIT)|$(my_module_multilib),|64)
 my_module_arch_supported := false
-else ifeq ($(call directory_is_64_bit_blacklisted,$(LOCAL_PATH)),true)
-my_module_arch_supported := false
 endif
 else # LOCAL_2ND_ARCH_VAR_PREFIX
 ifeq ($(my_module_multilib),first)
diff --git a/core/tasks/cts.mk b/core/tasks/cts.mk
index f991a9e..c521fa3 100644
--- a/core/tasks/cts.mk
+++ b/core/tasks/cts.mk
@@ -100,7 +100,7 @@
 	$(PRIVATE_PARAMS) CollectAllTests $(1) $(2) $(3) "$(4)" $(5) $(6)
 endef
 
-CORE_INTERMEDIATES :=$(call intermediates-dir-for,JAVA_LIBRARIES,core,,COMMON)
+CORE_INTERMEDIATES :=$(call intermediates-dir-for,JAVA_LIBRARIES,core-libart,,COMMON)
 CONSCRYPT_INTERMEDIATES :=$(call intermediates-dir-for,JAVA_LIBRARIES,conscrypt,,COMMON)
 BOUNCYCASTLE_INTERMEDIATES :=$(call intermediates-dir-for,JAVA_LIBRARIES,bouncycastle,,COMMON)
 APACHEXML_INTERMEDIATES :=$(call intermediates-dir-for,JAVA_LIBRARIES,apache-xml,,COMMON)
@@ -298,7 +298,7 @@
 CORE_VM_TEST_TF_DESC := $(CTS_TESTCASES_OUT)/android.core.vm-tests-tf.xml
 
 # core tests only needed to get hold of junit-framework-classes
-CORE_INTERMEDIATES :=$(call intermediates-dir-for,JAVA_LIBRARIES,core,,COMMON)
+CORE_INTERMEDIATES :=$(call intermediates-dir-for,JAVA_LIBRARIES,core-libart,,COMMON)
 JUNIT_INTERMEDIATES :=$(call intermediates-dir-for,JAVA_LIBRARIES,core-junit,,COMMON)
 
 GEN_CLASSPATH := $(CORE_INTERMEDIATES)/classes.jar:$(JUNIT_INTERMEDIATES)/classes.jar:$(VMTESTSTF_JAR):$(DDMLIB_JAR):$(TF_JAR)
diff --git a/core/tasks/tools/package-modules.mk b/core/tasks/tools/package-modules.mk
index 19e756a..f7e04ed 100644
--- a/core/tasks/tools/package-modules.mk
+++ b/core/tasks/tools/package-modules.mk
@@ -14,27 +14,27 @@
 my_copy_pairs :=
 my_pickup_files :=
 
-# Search for modules' built files and installed files;
+# Iterate over modules' built files and installed files;
 # Calculate the dest files in the output zip file.
-# If for 1 module name we found multiple installed files,
-# we use suffix matching to find the corresponding built file.
+
 $(foreach m,$(my_modules),\
-  $(if $(ALL_MODULES.$(m).INSTALLED),,\
+  $(eval _pickup_files := $(strip $(ALL_MODULES.$(m).PICKUP_FILES)\
+    $(ALL_MODULES.$(m)$(TARGET_2ND_ARCH_MODULE_SUFFIX).PICKUP_FILES)))\
+  $(eval _built_files := $(strip $(ALL_MODULES.$(m).BUILT_INSTALLED)\
+    $(ALL_MODULES.$(m)$(TARGET_2ND_ARCH_MODULE_SUFFIX).BUILT_INSTALLED)))\
+  $(if $(_pickup_files)$(_built_files),,\
     $(warning Unknown installed file for module '$(m)'))\
-  $(eval my_pickup_files += $(ALL_MODULES.$(m).PICKUP_FILES))\
-  $(foreach i,$(filter $(TARGET_OUT_ROOT)/%,$(ALL_MODULES.$(m).INSTALLED)),\
-    $(eval my_suffix := $(suffix $(i))) \
-    $(if $(my_suffix),\
-      $(eval my_patt := $(TARGET_OUT_ROOT)/%$(my_suffix)),\
-      $(eval my_patt := $(TARGET_OUT_ROOT)/%$(notdir $(i))))\
-    $(eval b := $(filter $(my_patt),$(ALL_MODULES.$(m).BUILT)))\
-    $(if $(filter 1,$(words $(b))),\
-      $(eval my_built_modules += $(b))\
+  $(eval my_pickup_files += $(_pickup_files))\
+  $(foreach i, $(_built_files),\
+    $(eval bui_ins := $(subst :,$(space),$(i)))\
+    $(eval ins := $(word 2,$(bui_ins)))\
+    $(if $(filter $(TARGET_OUT_ROOT)/%,$(ins)),\
+      $(eval bui := $(word 1,$(bui_ins)))\
+      $(eval my_built_modules += $(bui))\
       $(eval my_copy_dest := $(patsubst data/%,DATA/%,\
-                               $(patsubst system/%,SYSTEM/%,\
-                                 $(patsubst $(PRODUCT_OUT)/%,%,$(i)))))\
-      $(eval my_copy_pairs += $(b):$(my_staging_dir)/$(my_copy_dest)),\
-      $(warning Unexpected module built file '$(b)' for module '$(m)'))\
+                               $(patsubst system/%,DATA/%,\
+                                 $(patsubst $(PRODUCT_OUT)/%,%,$(ins)))))\
+      $(eval my_copy_pairs += $(bui):$(my_staging_dir)/$(my_copy_dest)))\
   ))
 
 my_package_zip := $(my_staging_dir)/$(my_package_name).zip
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 1e172ed..32979af 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 := 4.4.3
+  PLATFORM_VERSION := 4.4.3.43.43.43
 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 := AOSP
 endif
 
 ifeq "" "$(DEFAULT_APP_TARGET_SDK)"
diff --git a/envsetup.sh b/envsetup.sh
index 5d67f79..7bb56ae 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -943,6 +943,11 @@
     $GDB_CMD -x "$@"
 }
 
+function get_symbols_directory()
+{
+    echo $(get_abs_build_var TARGET_OUT_UNSTRIPPED)
+}
+
 # process the symbolic link of /proc/$PID/exe and use the host file tool to
 # determine whether it is a 32-bit or 64-bit executable. It returns "" or "64"
 # which can be conveniently used as suffix.
@@ -950,14 +955,9 @@
 {
     local PID="$1"
     if [ "$PID" ] ; then
-        local EXE=`adb shell ls -l /proc/$PID/exe \
-                   | tr -d '\r' \
-                   | cut -d'>' -f2 \
-                   | tr -d ' ' \
-                   | cut -d'/' -f4`
-
-        local OUT_EXE_SYMBOLS=$(get_abs_build_var TARGET_OUT_EXECUTABLES_UNSTRIPPED)
-        local IS64BIT=`file $OUT_EXE_SYMBOLS/$EXE | grep "64-bit"`
+        local EXE=`adb shell readlink /proc/$PID/exe`
+        local EXE_DIR=`get_abs_build_var PRODUCT_OUT`
+        local IS64BIT=`file "$EXE_DIR$EXE" | grep "64-bit"`
         if [ "$IS64BIT" != "" ]; then
             echo "64"
         else
@@ -977,7 +977,7 @@
    local OUT_SYMBOLS=$(get_abs_build_var TARGET_OUT_UNSTRIPPED)
    local OUT_SO_SYMBOLS=$(get_abs_build_var TARGET_OUT_SHARED_LIBRARIES_UNSTRIPPED)
    local OUT_VENDOR_SO_SYMBOLS=$(get_abs_build_var TARGET_OUT_VENDOR_SHARED_LIBRARIES_UNSTRIPPED)
-   local OUT_EXE_SYMBOLS=$(get_abs_build_var TARGET_OUT_EXECUTABLES_UNSTRIPPED)
+   local OUT_EXE_SYMBOLS=$(get_symbols_directory)
    local PREBUILTS=$(get_abs_build_var ANDROID_PREBUILTS)
    local ARCH=$(get_build_var TARGET_ARCH)
    local GDB
@@ -1057,6 +1057,7 @@
        else
            WHICH_GDB=$ANDROID_TOOLCHAIN_2ND_ARCH/$GDB
        fi
+
        gdbwrapper $WHICH_GDB "$OUT_ROOT/gdbclient.cmds" "$OUT_EXE_SYMBOLS/$EXE"
   else
        echo "Unable to determine build system output dir."
diff --git a/target/board/generic/BoardConfig.mk b/target/board/generic/BoardConfig.mk
index 6d58b1c..62303d6 100644
--- a/target/board/generic/BoardConfig.mk
+++ b/target/board/generic/BoardConfig.mk
@@ -77,17 +77,13 @@
 
 BOARD_SEPOLICY_DIRS += build/target/board/generic/sepolicy
 BOARD_SEPOLICY_UNION += \
-        adbd.te \
-        app.te \
         bootanim.te \
         device.te \
         domain.te \
         file.te \
         file_contexts \
-        mediaserver.te \
         qemud.te \
         rild.te \
         shell.te \
         surfaceflinger.te \
-        system_server.te \
-        zygote.te
+        system_server.te
diff --git a/target/board/generic/sepolicy/adbd.te b/target/board/generic/sepolicy/adbd.te
deleted file mode 100644
index f65cfb3..0000000
--- a/target/board/generic/sepolicy/adbd.te
+++ /dev/null
@@ -1 +0,0 @@
-allow adbd qemu_device:chr_file rw_file_perms;
diff --git a/target/board/generic/sepolicy/app.te b/target/board/generic/sepolicy/app.te
deleted file mode 100644
index fd33453..0000000
--- a/target/board/generic/sepolicy/app.te
+++ /dev/null
@@ -1 +0,0 @@
-allow appdomain qemu_device:chr_file rw_file_perms;
diff --git a/target/board/generic/sepolicy/bootanim.te b/target/board/generic/sepolicy/bootanim.te
index a5a84f9..d6506e1 100644
--- a/target/board/generic/sepolicy/bootanim.te
+++ b/target/board/generic/sepolicy/bootanim.te
@@ -1,3 +1,2 @@
 allow bootanim self:process execmem;
 allow bootanim ashmem_device:chr_file execute;
-allow bootanim qemu_device:chr_file rw_file_perms;
diff --git a/target/board/generic/sepolicy/domain.te b/target/board/generic/sepolicy/domain.te
index f026100..c28ca74 100644
--- a/target/board/generic/sepolicy/domain.te
+++ b/target/board/generic/sepolicy/domain.te
@@ -1,2 +1,3 @@
 # For /sys/qemu_trace files in the emulator.
 allow domain sysfs_writable:file rw_file_perms;
+allow domain qemu_device:chr_file rw_file_perms;
diff --git a/target/board/generic/sepolicy/mediaserver.te b/target/board/generic/sepolicy/mediaserver.te
deleted file mode 100644
index 90b8cf8..0000000
--- a/target/board/generic/sepolicy/mediaserver.te
+++ /dev/null
@@ -1 +0,0 @@
-allow mediaserver qemu_device:chr_file rw_file_perms;
diff --git a/target/board/generic/sepolicy/rild.te b/target/board/generic/sepolicy/rild.te
index 5de171a..e148b6c 100644
--- a/target/board/generic/sepolicy/rild.te
+++ b/target/board/generic/sepolicy/rild.te
@@ -1,2 +1 @@
-allow rild qemu_device:chr_file rw_file_perms;
 unix_socket_connect(rild, qemud, qemud)
diff --git a/target/board/generic/sepolicy/surfaceflinger.te b/target/board/generic/sepolicy/surfaceflinger.te
index 6712789..4c35469 100644
--- a/target/board/generic/sepolicy/surfaceflinger.te
+++ b/target/board/generic/sepolicy/surfaceflinger.te
@@ -1,3 +1,2 @@
 allow surfaceflinger self:process execmem;
 allow surfaceflinger ashmem_device:chr_file execute;
-allow surfaceflinger qemu_device:chr_file rw_file_perms;
diff --git a/target/board/generic/sepolicy/system_server.te b/target/board/generic/sepolicy/system_server.te
index ef4ce4a..d0fb79d 100644
--- a/target/board/generic/sepolicy/system_server.te
+++ b/target/board/generic/sepolicy/system_server.te
@@ -1,2 +1 @@
 unix_socket_connect(system_server, qemud, qemud)
-allow system_server qemu_device:chr_file rw_file_perms;
diff --git a/target/board/generic/sepolicy/zygote.te b/target/board/generic/sepolicy/zygote.te
deleted file mode 100644
index a5da574..0000000
--- a/target/board/generic/sepolicy/zygote.te
+++ /dev/null
@@ -1 +0,0 @@
-allow zygote qemu_device:chr_file rw_file_perms;
diff --git a/target/board/generic_arm64/BoardConfig.mk b/target/board/generic_arm64/BoardConfig.mk
index c383f87..1493bd9 100644
--- a/target/board/generic_arm64/BoardConfig.mk
+++ b/target/board/generic_arm64/BoardConfig.mk
@@ -23,7 +23,7 @@
 
 TARGET_2ND_ARCH := arm
 TARGET_2ND_ARCH_VARIANT := armv7-a-neon
-TARGET_2ND_CPU_VARIANT := generic
+TARGET_2ND_CPU_VARIANT := cortex-a15
 TARGET_2ND_CPU_ABI := armeabi-v7a
 TARGET_2ND_CPU_ABI2 := armeabi
 
diff --git a/target/board/generic_mips/BoardConfig.mk b/target/board/generic_mips/BoardConfig.mk
index 17e241d..a319ad7 100644
--- a/target/board/generic_mips/BoardConfig.mk
+++ b/target/board/generic_mips/BoardConfig.mk
@@ -59,13 +59,11 @@
 
 BOARD_SEPOLICY_DIRS += build/target/board/generic/sepolicy
 BOARD_SEPOLICY_UNION += \
-        adbd.te \
         bootanim.te \
         device.te \
         domain.te \
         file.te \
         file_contexts \
-        mediaserver.te \
         qemud.te \
         rild.te \
         shell.te \
diff --git a/target/board/generic_x86/BoardConfig.mk b/target/board/generic_x86/BoardConfig.mk
index 5277cdc..5d091f5 100644
--- a/target/board/generic_x86/BoardConfig.mk
+++ b/target/board/generic_x86/BoardConfig.mk
@@ -42,21 +42,19 @@
 BOARD_FLASH_BLOCK_SIZE := 512
 TARGET_USERIMAGES_SPARSE_EXT_DISABLED := true
 
-BOARD_SEPOLICY_DIRS += build/target/board/generic_x86/sepolicy
+BOARD_SEPOLICY_DIRS += \
+        build/target/board/generic/sepolicy \
+        build/target/board/generic_x86/sepolicy
+
 BOARD_SEPOLICY_UNION += \
-        app.te \
-        adbd.te \
-        bootanim.te \
         device.te \
         domain.te \
         file.te \
         file_contexts \
         healthd.te \
         installd.te \
-        mediaserver.te \
         qemud.te \
         rild.te \
         shell.te \
-        surfaceflinger.te \
         system_server.te \
         zygote.te
diff --git a/target/board/generic_x86/sepolicy/adbd.te b/target/board/generic_x86/sepolicy/adbd.te
deleted file mode 100644
index f65cfb3..0000000
--- a/target/board/generic_x86/sepolicy/adbd.te
+++ /dev/null
@@ -1 +0,0 @@
-allow adbd qemu_device:chr_file rw_file_perms;
diff --git a/target/board/generic_x86/sepolicy/app.te b/target/board/generic_x86/sepolicy/app.te
deleted file mode 100644
index fd33453..0000000
--- a/target/board/generic_x86/sepolicy/app.te
+++ /dev/null
@@ -1 +0,0 @@
-allow appdomain qemu_device:chr_file rw_file_perms;
diff --git a/target/board/generic_x86/sepolicy/bootanim.te b/target/board/generic_x86/sepolicy/bootanim.te
deleted file mode 100644
index 762a573..0000000
--- a/target/board/generic_x86/sepolicy/bootanim.te
+++ /dev/null
@@ -1 +0,0 @@
-allow bootanim qemu_device:chr_file rw_file_perms;
diff --git a/target/board/generic_x86/sepolicy/device.te b/target/board/generic_x86/sepolicy/device.te
deleted file mode 100644
index e4af13c..0000000
--- a/target/board/generic_x86/sepolicy/device.te
+++ /dev/null
@@ -1 +0,0 @@
-type qemu_device, dev_type;
diff --git a/target/board/generic_x86/sepolicy/domain.te b/target/board/generic_x86/sepolicy/domain.te
index c17950d..0bc8d87 100644
--- a/target/board/generic_x86/sepolicy/domain.te
+++ b/target/board/generic_x86/sepolicy/domain.te
@@ -1,3 +1 @@
-# For /sys/qemu_trace files in the emulator.
-allow domain sysfs_writable:file rw_file_perms;
 allow domain cpuctl_device:dir search;
diff --git a/target/board/generic_x86/sepolicy/file.te b/target/board/generic_x86/sepolicy/file.te
deleted file mode 100644
index 6fad80a..0000000
--- a/target/board/generic_x86/sepolicy/file.te
+++ /dev/null
@@ -1 +0,0 @@
-type qemud_socket, file_type;
diff --git a/target/board/generic_x86/sepolicy/file_contexts b/target/board/generic_x86/sepolicy/file_contexts
deleted file mode 100644
index f204cde..0000000
--- a/target/board/generic_x86/sepolicy/file_contexts
+++ /dev/null
@@ -1,4 +0,0 @@
-/dev/qemu_.*		u:object_r:qemu_device:s0
-/dev/socket/qemud	u:object_r:qemud_socket:s0
-/system/bin/qemud	u:object_r:qemud_exec:s0
-/sys/qemu_trace(/.*)?	--	u:object_r:sysfs_writable:s0
diff --git a/target/board/generic_x86/sepolicy/mediaserver.te b/target/board/generic_x86/sepolicy/mediaserver.te
deleted file mode 100644
index 90b8cf8..0000000
--- a/target/board/generic_x86/sepolicy/mediaserver.te
+++ /dev/null
@@ -1 +0,0 @@
-allow mediaserver qemu_device:chr_file rw_file_perms;
diff --git a/target/board/generic_x86/sepolicy/qemud.te b/target/board/generic_x86/sepolicy/qemud.te
deleted file mode 100644
index 4ff02ec..0000000
--- a/target/board/generic_x86/sepolicy/qemud.te
+++ /dev/null
@@ -1,6 +0,0 @@
-# qemu support daemon
-type qemud, domain;
-type qemud_exec, exec_type, file_type;
-
-init_daemon_domain(qemud)
-unconfined_domain(qemud)
diff --git a/target/board/generic_x86/sepolicy/rild.te b/target/board/generic_x86/sepolicy/rild.te
deleted file mode 100644
index 5de171a..0000000
--- a/target/board/generic_x86/sepolicy/rild.te
+++ /dev/null
@@ -1,2 +0,0 @@
-allow rild qemu_device:chr_file rw_file_perms;
-unix_socket_connect(rild, qemud, qemud)
diff --git a/target/board/generic_x86/sepolicy/shell.te b/target/board/generic_x86/sepolicy/shell.te
deleted file mode 100644
index b246d7e..0000000
--- a/target/board/generic_x86/sepolicy/shell.te
+++ /dev/null
@@ -1 +0,0 @@
-allow shell serial_device:chr_file rw_file_perms;
diff --git a/target/board/generic_x86/sepolicy/surfaceflinger.te b/target/board/generic_x86/sepolicy/surfaceflinger.te
deleted file mode 100644
index 865405c..0000000
--- a/target/board/generic_x86/sepolicy/surfaceflinger.te
+++ /dev/null
@@ -1 +0,0 @@
-allow surfaceflinger qemu_device:chr_file rw_file_perms;
diff --git a/target/board/generic_x86/sepolicy/system_server.te b/target/board/generic_x86/sepolicy/system_server.te
index 9bfe5fe..5d98a14 100644
--- a/target/board/generic_x86/sepolicy/system_server.te
+++ b/target/board/generic_x86/sepolicy/system_server.te
@@ -1,3 +1 @@
 allow system_server self:process execmem;
-unix_socket_connect(system_server, qemud, qemud)
-allow system_server qemu_device:chr_file rw_file_perms;
diff --git a/target/board/generic_x86/sepolicy/zygote.te b/target/board/generic_x86/sepolicy/zygote.te
index d34c4a1..93993a4 100644
--- a/target/board/generic_x86/sepolicy/zygote.te
+++ b/target/board/generic_x86/sepolicy/zygote.te
@@ -1,3 +1,2 @@
 allow zygote self:process execmem;
 allow zygote self:capability sys_nice;
-allow zygote qemu_device:chr_file rw_file_perms;
diff --git a/target/board/generic_x86_64/BoardConfig.mk b/target/board/generic_x86_64/BoardConfig.mk
index 876caf3..c597f7d 100755
--- a/target/board/generic_x86_64/BoardConfig.mk
+++ b/target/board/generic_x86_64/BoardConfig.mk
@@ -41,7 +41,7 @@
 USE_OPENGL_RENDERER := true
 
 TARGET_USERIMAGES_USE_EXT4 := true
-BOARD_SYSTEMIMAGE_PARTITION_SIZE := 786432000
+BOARD_SYSTEMIMAGE_PARTITION_SIZE := 880803840 # 840M
 BOARD_USERDATAIMAGE_PARTITION_SIZE := 576716800
 BOARD_CACHEIMAGE_PARTITION_SIZE := 69206016
 BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE := ext4
diff --git a/target/product/core_64_bit.mk b/target/product/core_64_bit.mk
index 971b6bd..76e2a36 100644
--- a/target/product/core_64_bit.mk
+++ b/target/product/core_64_bit.mk
@@ -22,12 +22,12 @@
 # For now this will allow 64-bit apps, but still compile all apps with JNI
 # for 32-bit only.
 
-# Copy the 32-bit primary, 64-bit secondary zygote startup script
-PRODUCT_COPY_FILES += system/core/rootdir/init.zygote32_64.rc:root/init.zygote32_64.rc
+# Copy the 64-bit primary, 32-bit secondary zygote startup script
+PRODUCT_COPY_FILES += system/core/rootdir/init.zygote64_32.rc:root/init.zygote64_32.rc
 
-# Set the zygote property to select the 32-bit primary, 64-bit secondary script
+# Set the zygote property to select the 64-bit primary, 32-bit secondary script
 # This line must be parsed before the one in core_minimal.mk
-PRODUCT_DEFAULT_PROPERTY_OVERRIDES += ro.zygote=zygote32_64
+PRODUCT_DEFAULT_PROPERTY_OVERRIDES += ro.zygote=zygote64_32
 
 TARGET_SUPPORTS_32_BIT_APPS := true
 TARGET_SUPPORTS_64_BIT_APPS := true
diff --git a/target/product/core_base.mk b/target/product/core_base.mk
index 8161434..529b5f2 100644
--- a/target/product/core_base.mk
+++ b/target/product/core_base.mk
@@ -67,7 +67,7 @@
 $(call inherit-product, $(SRC_TARGET_DIR)/product/core_minimal.mk)
 # Override the PRODUCT_BOOT_JARS set in core_minimal.mk. The order matters.
 PRODUCT_BOOT_JARS := \
-    core \
+    core-libart \
     conscrypt \
     okhttp \
     core-junit \
diff --git a/target/product/core_minimal.mk b/target/product/core_minimal.mk
index 9cd2903..ec51ea4 100644
--- a/target/product/core_minimal.mk
+++ b/target/product/core_minimal.mk
@@ -61,7 +61,7 @@
 
 # The order of PRODUCT_BOOT_JARS matters.
 PRODUCT_BOOT_JARS := \
-    core \
+    core-libart \
     conscrypt \
     okhttp \
     core-junit \
diff --git a/target/product/embedded.mk b/target/product/embedded.mk
index 9880cd2..cfac003 100644
--- a/target/product/embedded.mk
+++ b/target/product/embedded.mk
@@ -75,7 +75,8 @@
     seapp_contexts \
     property_contexts \
     mac_permissions.xml \
-    selinux_version
+    selinux_version \
+    service_contexts
 
 
 PRODUCT_COPY_FILES += \
diff --git a/target/product/full_x86_64.mk b/target/product/full_x86_64.mk
index cd401a8..d9c0c1e 100755
--- a/target/product/full_x86_64.mk
+++ b/target/product/full_x86_64.mk
@@ -23,10 +23,6 @@
 # that isn't a wifi connection. This will instruct init.rc to enable the
 # network connection so that you can use it with ADB
 
-PRODUCT_DEFAULT_PROPERTY_OVERRIDES += ro.zygote=zygote64_32
-PRODUCT_COPY_FILES += system/core/rootdir/init.zygote64_32.rc:root/init.zygote64_32.rc
-
-
 $(call inherit-product, $(SRC_TARGET_DIR)/product/core_64_bit.mk)
 $(call inherit-product, $(SRC_TARGET_DIR)/product/aosp_base_telephony.mk)
 $(call inherit-product, $(SRC_TARGET_DIR)/board/generic_x86_64/device.mk)
diff --git a/target/product/runtime_common.mk b/target/product/runtime_common.mk
index faa6fe8..9ae182a 100644
--- a/target/product/runtime_common.mk
+++ b/target/product/runtime_common.mk
@@ -39,20 +39,3 @@
     libssl \
     libz \
     okhttp
-
-# host-only dependencies
-ifeq ($(WITH_HOST_DALVIK),true)
-    PRODUCT_PACKAGES += \
-        apache-xml-hostdex \
-        bouncycastle-hostdex \
-        conscrypt-hostdex \
-        dalvik \
-        libcrypto-host \
-        libexpat-host \
-        libicui18n-host \
-        libicuuc-host \
-        libjavacore \
-        libssl-host \
-        libz-host \
-        okhttp-hostdex
-endif
diff --git a/target/product/runtime_libart.mk b/target/product/runtime_libart.mk
index 1a7c925..de4cf17 100644
--- a/target/product/runtime_libart.mk
+++ b/target/product/runtime_libart.mk
@@ -22,10 +22,4 @@
         dex2oat \
         oatdump
 
-# host-only dependencies
-ifeq ($(WITH_HOST_DALVIK),true)
-    PRODUCT_PACKAGES += \
-        core-libart-hostdex
-endif
-
 include $(SRC_TARGET_DIR)/product/runtime_common.mk
diff --git a/target/product/runtime_libdvm.mk b/target/product/runtime_libdvm.mk
index e7647b8..638d7d7 100644
--- a/target/product/runtime_libdvm.mk
+++ b/target/product/runtime_libdvm.mk
@@ -21,10 +21,4 @@
     libdvm \
     dexopt
 
-# host-only dependencies
-ifeq ($(WITH_HOST_DALVIK),true)
-    PRODUCT_PACKAGES += \
-        core-hostdex
-endif
-
 include $(SRC_TARGET_DIR)/product/runtime_common.mk
diff --git a/tools/releasetools/ota_from_target_files b/tools/releasetools/ota_from_target_files
index 8d3f6ce..e695218 100755
--- a/tools/releasetools/ota_from_target_files
+++ b/tools/releasetools/ota_from_target_files
@@ -57,6 +57,10 @@
       first, so that any changes made to the system partition are done
       using the new recovery (new kernel, etc.).
 
+  -t  (--worker_threads) <int>
+      Specifies the number of worker-threads that will be used when
+      generating patches for incremental updates (defaults to 3).
+
 """
 
 import sys
@@ -965,8 +969,12 @@
         OPTIONS.aslr_mode = True
       else:
         OPTIONS.aslr_mode = False
-    elif o in ("--worker_threads"):
-      OPTIONS.worker_threads = int(a)
+    elif o in ("-t", "--worker_threads"):
+      if a.isdigit():
+        OPTIONS.worker_threads = int(a)
+      else:
+        raise ValueError("Cannot parse value %r for option %r - only "
+                         "integers are allowed." % (a, o))
     elif o in ("-2", "--two_step"):
       OPTIONS.two_step = True
     elif o in ("--no_signing"):
@@ -976,7 +984,7 @@
     return True
 
   args = common.ParseOptions(argv, __doc__,
-                             extra_opts="b:k:i:d:wne:a:2",
+                             extra_opts="b:k:i:d:wne:t:a:2",
                              extra_long_opts=["board_config=",
                                               "package_key=",
                                               "incremental_from=",