diff --git a/CleanSpec.mk b/CleanSpec.mk
new file mode 100644
index 0000000..bf47314
--- /dev/null
+++ b/CleanSpec.mk
@@ -0,0 +1,109 @@
+# Copyright (C) 2007 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.
+#
+
+# If you don't need to do a full clean build but would like to touch
+# a file or delete some intermediate files, add a clean step to the end
+# of the list.  These steps will only be run once, if they haven't been
+# run before.
+#
+# E.g.:
+#     $(call add-clean-step, touch -c external/sqlite/sqlite3.h)
+#     $(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/STATIC_LIBRARIES/libz_intermediates)
+#
+# Always use "touch -c" and "rm -f" or "rm -rf" to gracefully deal with
+# files that are missing or have been moved.
+#
+# Use $(PRODUCT_OUT) to get to the "out/target/product/blah/" directory.
+# Use $(OUT_DIR) to refer to the "out" directory.
+#
+# If you need to re-do something that's already mentioned, just copy
+# the command and add it to the bottom of the list.  E.g., if a change
+# that you made last week required touching a file and a change you
+# made today requires touching the same file, just copy the old
+# touch step and add it to the end of the list.
+#
+# ************************************************
+# NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
+# ************************************************
+
+# For example:
+#$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/APPS/AndroidTests_intermediates)
+#$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/core_intermediates)
+#$(call add-clean-step, find $(OUT_DIR) -type f -name "IGTalkSession*" -print0 | xargs -0 rm -f)
+#$(call add-clean-step, rm -rf $(PRODUCT_OUT)/data/*)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/core/java/com/android/internal/os/IDropBoxService.java)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/core/java/android/backup)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/core/java/com/android/internal/backup)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/core/java/android/backup)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/core/java/com/android/internal/backup)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/core/java/android/app)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/core/java/android/content)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/APPS/FrameworkTest_intermediates/)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/android.policy*)
+$(call add-clean-step, rm -rf $(TARGET_OUT_JAVA_LIBRARIES)/android.policy.jar)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates)
+$(call add-clean-step, rm -f $(PRODUCT_OUT)/obj/lib/libequalizer.so)
+$(call add-clean-step, rm -f $(PRODUCT_OUT)/obj/lib/libequalizertest.so)
+$(call add-clean-step, rm -f $(PRODUCT_OUT)/obj/lib/libreverb.so)
+$(call add-clean-step, rm -f $(PRODUCT_OUT)/obj/lib/libreverbtest.so)
+$(call add-clean-step, rm -f $(PRODUCT_OUT)/symbols/system/lib/libequalizer.so)
+$(call add-clean-step, rm -f $(PRODUCT_OUT)/symbols/system/lib/libequalizertest.so)
+$(call add-clean-step, rm -f $(PRODUCT_OUT)/symbols/system/lib/libreverb.so)
+$(call add-clean-step, rm -f $(PRODUCT_OUT)/symbols/system/lib/libreverbtest.so)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/SHARED_LIBRARIES/libequalizer_intermediates)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/SHARED_LIBRARIES/libequalizertest_intermediates)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/SHARED_LIBRARIES/libreverb_intermediates)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/SHARED_LIBRARIES/libreverbtest_intermediates)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/lib/soundfx/)
+$(call add-clean-step, find . -type f -name "*.rs" -print0 | xargs -0 touch)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/SHARED_LIBRARIES/libandroid_runtime_intermediates)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/lib/libandroid_runtime.so)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/symbols/system/lib/libandroid_runtime.so)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/lib/libandroid_runtime.so)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/SHARED_LIBRARIES/libhwui_intermediates)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/lib/libhwui.so)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/symbols/system/lib/libhwui.so)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/lib/libhwui.so)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/core/java/android/os/storage/*)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/core/java/android/content/IClipboard.P)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/telephony/java/com/android/internal/telephony/ITelephonyRegistry.P)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/android_stubs_current_intermediates)
+$(call add-clean-step, rm -rf out/target/common/docs/api-stubs*)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/core/java/com/trustedlogic)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/android_stubs_current_intermediates/src/com/trustedlogic)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/core/java/com/trustedlogic)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/android_stubs_current_intermediates/src/com/trustedlogic)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/target/common/obj/APPS/Music2_intermediates)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/core/java/android/nfc/INdefTag.java)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/STATIC_LIBRARIES/libstagefright_aacdec_intermediates)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/STATIC_LIBRARIES/libstagefright_mp3dec_intermediates)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/APPS/ImageProcessing_intermediates/)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/APPS/ModelViewer_intermediates/)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/APPS/PerfTest_intermediates/)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/APPS/RSTest_intermediates/)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/core/java/android/hardware/IUsbManager.java)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/core/java/android/nfc)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/SHARED_LIBRARIES/libstagefright_intermediates)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/core/java/android/os)
+$(call add-clean-step, rm -rf $(OUT_DIR)target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/keystore/java/android/security/IKeyChainAliasResponse.java)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/vpn)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/core/java/android/nfc)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/APPS/SystemUI_intermediates)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/R/com/android/systemui/R.java)
+# ************************************************
+# NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
+# ************************************************