diff --git a/core/dex_preopt_odex_install.mk b/core/dex_preopt_odex_install.mk
index 10b41bd..c3d47f7 100644
--- a/core/dex_preopt_odex_install.mk
+++ b/core/dex_preopt_odex_install.mk
@@ -69,61 +69,24 @@
 # For a Java library, we build odex for both 1st arch and 2nd arch, if we have one.
 # #################################################
 # Odex for the 1st arch
-built_odex := $(call get-odex-file-path,$(DEX2OAT_TARGET_ARCH),$(LOCAL_BUILT_MODULE))
-ifdef LOCAL_DEX_PREOPT_IMAGE_LOCATION
-my_dex_preopt_image_location := $(LOCAL_DEX_PREOPT_IMAGE_LOCATION)
-else
-my_dex_preopt_image_location := $(DEFAULT_DEX_PREOPT_BUILT_IMAGE_LOCATION)
-endif
-my_dex_preopt_image_filename := $(call get-image-file-path,$(DEX2OAT_TARGET_ARCH),$(my_dex_preopt_image_location))
-$(built_odex): PRIVATE_2ND_ARCH_VAR_PREFIX :=
-$(built_odex): PRIVATE_DEX_LOCATION := $(patsubst $(PRODUCT_OUT)%,%,$(LOCAL_INSTALLED_MODULE))
-$(built_odex): PRIVATE_DEX_PREOPT_IMAGE_LOCATION := $(my_dex_preopt_image_location)
-$(built_odex) : $(DEXPREOPT_ONE_FILE_DEPENDENCY_BUILT_BOOT_PREOPT) \
-                $(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)
+my_2nd_arch_prefix :=
+include $(BUILD_SYSTEM)/setup_one_odex.mk
 # #################################################
 # Odex for the 2nd arch
 ifdef TARGET_2ND_ARCH
-built_odex2 := $(call get-odex-file-path,$($(TARGET_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_ARCH),$(LOCAL_BUILT_MODULE))
-ifdef LOCAL_DEX_PREOPT_IMAGE_LOCATION
-my_dex_preopt_image_location := $(LOCAL_DEX_PREOPT_IMAGE_LOCATION)
-else
-my_dex_preopt_image_location := $($(TARGET_2ND_ARCH_VAR_PREFIX)DEFAULT_DEX_PREOPT_BUILT_IMAGE_LOCATION)
-endif
-my_dex_preopt_image_filename := $(call get-image-file-path,$($(TARGET_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_ARCH),$(my_dex_preopt_image_location))
-$(built_odex2): PRIVATE_2ND_ARCH_VAR_PREFIX := $(TARGET_2ND_ARCH_VAR_PREFIX)
-$(built_odex2): PRIVATE_DEX_LOCATION := $(patsubst $(PRODUCT_OUT)%,%,$(LOCAL_INSTALLED_MODULE))
-$(built_odex2): PRIVATE_DEX_PREOPT_IMAGE_LOCATION := $(my_dex_preopt_image_location)
-$(built_odex2) : $($(TARGET_2ND_ARCH_VAR_PREFIX)DEXPREOPT_ONE_FILE_DEPENDENCY_BUILT_BOOT_PREOPT) \
-                 $(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 += $(installed_odex2)
-built_installed_odex += $(built_odex2):$(installed_odex2)
+my_2nd_arch_prefix := $(TARGET_2ND_ARCH_VAR_PREFIX)
+include $(BUILD_SYSTEM)/setup_one_odex.mk
 endif  # TARGET_2ND_ARCH
 # #################################################
 else  # must be APPS
-# For an app, we build for the multilib arch it's targeted for.
-built_odex := $(call get-odex-file-path,$($(LOCAL_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_ARCH),$(LOCAL_BUILT_MODULE))
-ifdef LOCAL_DEX_PREOPT_IMAGE_LOCATION
-my_dex_preopt_image_location := $(LOCAL_DEX_PREOPT_IMAGE_LOCATION)
-else
-my_dex_preopt_image_location := $($(LOCAL_2ND_ARCH_VAR_PREFIX)DEFAULT_DEX_PREOPT_BUILT_IMAGE_LOCATION)
-endif
-my_dex_preopt_image_filename := $(call get-image-file-path,$($(LOCAL_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_ARCH),$(my_dex_preopt_image_location))
-$(built_odex): PRIVATE_2ND_ARCH_VAR_PREFIX := $(LOCAL_2ND_ARCH_VAR_PREFIX)
-$(built_odex): PRIVATE_DEX_LOCATION := $(patsubst $(PRODUCT_OUT)%,%,$(LOCAL_INSTALLED_MODULE))
-$(built_odex): PRIVATE_DEX_PREOPT_IMAGE_LOCATION := $(my_dex_preopt_image_location)
-$(built_odex) : $($(LOCAL_2ND_ARCH_VAR_PREFIX)DEXPREOPT_ONE_FILE_DEPENDENCY_BUILT_BOOT_PREOPT) \
-                $(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)
+# The preferred arch
+my_2nd_arch_prefix := $(LOCAL_2ND_ARCH_VAR_PREFIX)
+include $(BUILD_SYSTEM)/setup_one_odex.mk
+ifeq ($(LOCAL_MULTILIB),both)
+# The non-preferred arch
+my_2nd_arch_prefix := $(if $(LOCAL_2ND_ARCH_VAR_PREFIX),,$(TARGET_2ND_ARCH_VAR_PREFIX))
+include $(BUILD_SYSTEM)/setup_one_odex.mk
+endif  # LOCAL_MULTILIB is both
 endif  # LOCAL_MODULE_CLASS
 endif # libart
 endif # boot jar
diff --git a/core/package_internal.mk b/core/package_internal.mk
index 0d6f9ea..d1e4212 100644
--- a/core/package_internal.mk
+++ b/core/package_internal.mk
@@ -403,7 +403,8 @@
 ## Rule to build the odex file
 ifdef LOCAL_DEX_PREOPT
 $(built_odex): PRIVATE_DEX_FILE := $(built_dex)
-$(built_odex) : $(built_dex)
+# Use pattern rule - we may have multiple built odex files.
+$(built_odex) : $(dir $(LOCAL_BUILT_MODULE))% : $(built_dex)
 	$(hide) mkdir -p $(dir $@) && rm -f $@
 	$(add-dex-to-package)
 	$(hide) mv $@ $@.input
diff --git a/core/setup_one_odex.mk b/core/setup_one_odex.mk
new file mode 100644
index 0000000..ec8a28a
--- /dev/null
+++ b/core/setup_one_odex.mk
@@ -0,0 +1,39 @@
+#
+# Copyright (C) 2014 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.
+#
+
+# Set up variables and dependency for one odex file
+# Input variables: my_2nd_arch_prefix
+# Output(modified) variables: built_odex, installed_odex, built_installed_odex
+
+my_built_odex := $(call get-odex-file-path,$($(my_2nd_arch_prefix)DEX2OAT_TARGET_ARCH),$(LOCAL_BUILT_MODULE))
+ifdef LOCAL_DEX_PREOPT_IMAGE_LOCATION
+my_dex_preopt_image_location := $(LOCAL_DEX_PREOPT_IMAGE_LOCATION)
+else
+my_dex_preopt_image_location := $($(my_2nd_arch_prefix)DEFAULT_DEX_PREOPT_BUILT_IMAGE_LOCATION)
+endif
+my_dex_preopt_image_filename := $(call get-image-file-path,$($(my_2nd_arch_prefix)DEX2OAT_TARGET_ARCH),$(my_dex_preopt_image_location))
+$(my_built_odex): PRIVATE_2ND_ARCH_VAR_PREFIX := $(my_2nd_arch_prefix)
+$(my_built_odex): PRIVATE_DEX_LOCATION := $(patsubst $(PRODUCT_OUT)%,%,$(LOCAL_INSTALLED_MODULE))
+$(my_built_odex): PRIVATE_DEX_PREOPT_IMAGE_LOCATION := $(my_dex_preopt_image_location)
+$(my_built_odex) : $($(my_2nd_arch_prefix)DEXPREOPT_ONE_FILE_DEPENDENCY_BUILT_BOOT_PREOPT) \
+    $(DEXPREOPT_ONE_FILE_DEPENDENCY_TOOLS) \
+    $(my_dex_preopt_image_filename)
+
+my_installed_odex := $(call get-odex-file-path,$($(my_2nd_arch_prefix)DEX2OAT_TARGET_ARCH),$(LOCAL_INSTALLED_MODULE))
+
+built_odex += $(my_built_odex)
+installed_odex += $(my_installed_odex)
+built_installed_odex += $(my_built_odex):$(my_installed_odex)