diff --git a/CleanSpec.mk b/CleanSpec.mk
index f001da9..ee85995 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -214,6 +214,9 @@
 # Rename persist.sys.dalvik.vm.lib to allow new default
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
 
+# Add ro.product.cpu.abilist{32,64} to build.prop.
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
+
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************
diff --git a/core/Makefile b/core/Makefile
index 918a94f..d223122 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -192,6 +192,8 @@
 			BUILD_FINGERPRINT="$(BUILD_FINGERPRINT)" \
 			TARGET_BOARD_PLATFORM="$(TARGET_BOARD_PLATFORM)" \
 			TARGET_CPU_ABI_LIST="$(TARGET_CPU_ABI_LIST)" \
+			TARGET_CPU_ABI_LIST_32_BIT="$(TARGET_CPU_ABI_LIST_32_BIT)" \
+			TARGET_CPU_ABI_LIST_64_BIT="$(TARGET_CPU_ABI_LIST_64_BIT)" \
 			TARGET_CPU_ABI="$(TARGET_CPU_ABI)" \
 			TARGET_CPU_ABI2="$(TARGET_CPU_ABI2)" \
 			TARGET_AAPT_CHARACTERISTICS="$(TARGET_AAPT_CHARACTERISTICS)" \
diff --git a/core/config.mk b/core/config.mk
index 4b91e36..653a9bc 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -231,6 +231,44 @@
 include $(BUILD_SYSTEM)/combo/select.mk
 endif
 
+# "ro.product.cpu.abilist" is a comma separated list of ABIs (in order
+# of preference) that the target supports. If a TARGET_CPU_ABI_LIST
+# is specified by the board configuration, we use that. If not, we
+# build a list out of the TARGET_CPU_ABIs specified by the config.
+ifeq (,$(TARGET_CPU_ABI_LIST))
+  TARGET_CPU_ABI_LIST := $(TARGET_CPU_ABI) $(TARGET_CPU_ABI2) $(TARGET_2ND_CPU_ABI) $(TARGET_2ND_CPU_ABI2)
+endif
+
+# "ro.product.cpu.abilist32" and "ro.product.cpu.abilist64" are
+# comma separated lists of the 32 and 64 bit ABIs (in order of
+# preference) that the target supports. If TARGET_CPU_ABI_LIST_{32,64}_BIT
+# are defined by the board config, we use them. Else, we construct
+# these lists based on whether TARGET_IS_64_BIT is set.
+#
+# Note that this assumes that the 2ND_CPU_ABI for a 64 bit target
+# is always 32 bits. If this isn't the case, these variables should
+# be overriden in the boarc configuration.
+ifeq (,$(TARGET_CPU_ABI_LIST_64_BIT))
+  ifeq (true,$(TARGET_IS_64_BIT))
+    TARGET_CPU_ABI_LIST_64_BIT := $(TARGET_CPU_ABI) $(TARGET_CPU_ABI2)
+  endif
+endif
+
+ifeq (,$(TARGET_CPU_ABI_LIST_32_BIT))
+  ifneq (true,$(TARGET_IS_64_BIT))
+    TARGET_CPU_ABI_LIST_32_BIT := $(TARGET_CPU_ABI) $(TARGET_CPU_ABI2)
+  else
+    # For a 64 bit target, assume that the 2ND_CPU_ABI
+    # is a 32 bit ABI.
+    TARGET_CPU_ABI_LIST_32_BIT := $(TARGET_2ND_CPU_ABI) $(TARGET_2ND_CPU_ABI2)
+  endif
+endif
+
+# Strip whitespace from the ABI list string.
+TARGET_CPU_ABI_LIST := $(subst $(space),$(comma),$(strip $(TARGET_CPU_ABI_LIST)))
+TARGET_CPU_ABI_LIST_32_BIT := $(subst $(space),$(comma),$(strip $(TARGET_CPU_ABI_LIST_32_BIT)))
+TARGET_CPU_ABI_LIST_64_BIT := $(subst $(space),$(comma),$(strip $(TARGET_CPU_ABI_LIST_64_BIT)))
+
 # Compute TARGET_TOOLCHAIN_ROOT from TARGET_TOOLS_PREFIX
 # if only TARGET_TOOLS_PREFIX is passed to the make command.
 ifndef TARGET_TOOLCHAIN_ROOT
diff --git a/core/envsetup.mk b/core/envsetup.mk
index 628c95b..4cb389b 100644
--- a/core/envsetup.mk
+++ b/core/envsetup.mk
@@ -143,28 +143,6 @@
 TARGET_DEVICE_DIR := $(patsubst %/,%,$(dir $(board_config_mk)))
 board_config_mk :=
 
-# "ro.product.cpu.abilist" is a comma separated list of ABIs (in order
-# of preference) that the target supports. If a TARGET_CPU_ABI_LIST
-# is specified by the board configuration, we use that. If not, we
-# build a list out of the TARGET_CPU_ABIs specified by the config.
-ifeq (,$(TARGET_CPU_ABI_LIST))
-  TARGET_CPU_ABI_LIST := $(TARGET_CPU_ABI)
-  ifneq (,$(TARGET_CPU_ABI2))
-    TARGET_CPU_ABI_LIST += ,$(TARGET_CPU_ABI2)
-  endif
-  ifneq (,$(TARGET_2ND_CPU_ABI))
-    TARGET_CPU_ABI_LIST += ,$(TARGET_2ND_CPU_ABI)
-  endif
-  ifneq (,$(TARGET_2ND_CPU_ABI2))
-    TARGET_CPU_ABI_LIST += ,$(TARGET_2ND_CPU_ABI2)
-  endif
-
-  # Strip whitespace from the ABI list string.
-  empty :=
-  space := $(empty) $(empty)
-  TARGET_CPU_ABI_LIST := $(subst $(space),,$(TARGET_CPU_ABI_LIST))
-endif
-
 # ---------------------------------------------------------------
 # Set up configuration for target machine.
 # The following must be set:
diff --git a/tools/buildinfo.sh b/tools/buildinfo.sh
index 39ddc66..46a73f8 100755
--- a/tools/buildinfo.sh
+++ b/tools/buildinfo.sh
@@ -30,6 +30,8 @@
   echo "ro.product.cpu.abi2=$TARGET_CPU_ABI2"
 fi
 echo "ro.product.cpu.abilist=$TARGET_CPU_ABI_LIST"
+echo "ro.product.cpu.abilist32=$TARGET_CPU_ABI_LIST_32_BIT"
+echo "ro.product.cpu.abilist64=$TARGET_CPU_ABI_LIST_64_BIT"
 
 echo "ro.product.manufacturer=$PRODUCT_MANUFACTURER"
 if [ -n "$PRODUCT_DEFAULT_LANGUAGE" ] ; then