diff --git a/Android.mk b/Android.mk
new file mode 100644
index 0000000..e3b4ae5
--- /dev/null
+++ b/Android.mk
@@ -0,0 +1,307 @@
+#
+# Copyright (C) 2015 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.
+#
+
+LOCAL_PATH := $(my-dir)
+
+# Definitions applying to all targets. $(eval) this last.
+define update_engine_common
+    LOCAL_CPP_EXTENSION := .cc
+    LOCAL_RTTI_FLAG := -frtti
+    LOCAL_CLANG := true
+
+    LOCAL_CFLAGS += \
+        -DUSE_HWID_OVERRIDE=0 \
+        -DUSE_MTD=0 \
+        -DUSE_POWER_MANAGEMENT=0 \
+        -D_FILE_OFFSET_BITS=64 \
+        -D_POSIX_C_SOURCE=199309L \
+        -Wa,--noexecstack \
+        -Wall \
+        -Werror \
+        -Wextra \
+        -Wformat=2 \
+        -Wno-psabi \
+        -Wno-unused-parameter \
+        -ffunction-sections \
+        -fstack-protector-strong \
+        -fvisibility=hidden
+    LOCAL_CPPFLAGS += \
+        -Wnon-virtual-dtor \
+        -fno-strict-aliasing \
+        -std=gnu++11
+    LOCAL_LDFLAGS += \
+        -Wl,--gc-sections
+    LOCAL_C_INCLUDES += \
+        external/gtest/include \
+        system
+    LOCAL_SHARED_LIBRARIES += \
+        libchrome \
+        libchrome-dbus \
+        libchromeos \
+        libchromeos-dbus \
+        libchromeos-http \
+        libchromeos-stream
+endef
+
+# update_metadata-protos (type: static_library)
+# ========================================================
+# Protobufs.
+include $(CLEAR_VARS)
+LOCAL_MODULE := update_metadata-protos
+LOCAL_MODULE_CLASS := STATIC_LIBRARIES
+generated_sources_dir := $(call local-generated-sources-dir)
+LOCAL_EXPORT_C_INCLUDE_DIRS += \
+    $(generated_sources_dir)/proto/system
+LOCAL_SHARED_LIBRARIES += \
+    libprotobuf-cpp-lite-rtti
+LOCAL_SRC_FILES := \
+    update_metadata.proto
+$(eval $(update_engine_common))
+include $(BUILD_STATIC_LIBRARY)
+
+# update_engine-dbus-adaptor (from generate-dbus-adaptors.gypi)
+# ========================================================
+include $(CLEAR_VARS)
+LOCAL_MODULE := update_engine-dbus-adaptor
+LOCAL_SRC_FILES := \
+    dbus_bindings/org.chromium.UpdateEngineInterface.dbus-xml
+include $(BUILD_STATIC_LIBRARY)
+
+# update_engine-dbus-libcros-client (from generate-dbus-proxies.gypi)
+# ========================================================
+include $(CLEAR_VARS)
+LOCAL_MODULE := update_engine-dbus-libcros-client
+LOCAL_SRC_FILES := \
+    dbus_bindings/org.chromium.LibCrosService.dbus-xml
+LOCAL_DBUS_PROXY_PREFIX := libcros
+include $(BUILD_STATIC_LIBRARY)
+
+# libupdate_engine (type: static_library)
+# ========================================================
+# The main static_library with all the code.
+include $(CLEAR_VARS)
+LOCAL_MODULE := libupdate_engine
+LOCAL_MODULE_CLASS := STATIC_LIBRARIES
+LOCAL_C_INCLUDES += \
+    external/e2fsprogs/lib \
+    $(LOCAL_PATH)/include
+LOCAL_EXPORT_C_INCLUDE_DIRS += \
+    $(LOCAL_PATH)/include
+LOCAL_STATIC_LIBRARIES += \
+    update_metadata-protos \
+    update_engine-dbus-adaptor \
+    update_engine-dbus-libcros-client \
+    update_engine_client-dbus-proxies \
+    libbz
+LOCAL_SHARED_LIBRARIES += \
+    libprotobuf-cpp-lite-rtti \
+    libdbus \
+    libcrypto \
+    libcurl \
+    libmetrics \
+    libssl \
+    libexpat \
+    libchromeos-policy
+LOCAL_SRC_FILES := \
+    action_processor.cc \
+    boot_control_android.cc \
+    bzip.cc \
+    bzip_extent_writer.cc \
+    certificate_checker.cc \
+    chrome_browser_proxy_resolver.cc \
+    clock.cc \
+    connection_manager.cc \
+    constants.cc \
+    daemon.cc \
+    dbus_service.cc \
+    delta_performer.cc \
+    download_action.cc \
+    extent_writer.cc \
+    file_descriptor.cc \
+    file_writer.cc \
+    filesystem_verifier_action.cc \
+    hardware_android.cc \
+    http_common.cc \
+    http_fetcher.cc \
+    hwid_override.cc \
+    install_plan.cc \
+    libcros_proxy.cc \
+    libcurl_http_fetcher.cc \
+    metrics.cc \
+    multi_range_http_fetcher.cc \
+    omaha_hash_calculator.cc \
+    omaha_request_action.cc \
+    omaha_request_params.cc \
+    omaha_response_handler_action.cc \
+    p2p_manager.cc \
+    payload_constants.cc \
+    payload_state.cc \
+    payload_verifier.cc \
+    postinstall_runner_action.cc \
+    prefs.cc \
+    proxy_resolver.cc \
+    real_system_state.cc \
+    shill_proxy.cc \
+    subprocess.cc \
+    terminator.cc \
+    update_attempter.cc \
+    update_manager/boxed_value.cc \
+    update_manager/chromeos_policy.cc \
+    update_manager/default_policy.cc \
+    update_manager/evaluation_context.cc \
+    update_manager/policy.cc \
+    update_manager/real_config_provider.cc \
+    update_manager/real_device_policy_provider.cc \
+    update_manager/real_random_provider.cc \
+    update_manager/real_shill_provider.cc \
+    update_manager/real_system_provider.cc \
+    update_manager/real_time_provider.cc \
+    update_manager/real_updater_provider.cc \
+    update_manager/state_factory.cc \
+    update_manager/update_manager.cc \
+    utils.cc
+$(eval $(update_engine_common))
+include $(BUILD_STATIC_LIBRARY)
+
+# update_engine (type: executable)
+# ========================================================
+# update_engine daemon.
+include $(CLEAR_VARS)
+LOCAL_MODULE := update_engine
+LOCAL_MODULE_CLASS := EXECUTABLES
+LOCAL_STATIC_LIBRARIES += \
+    libupdate_engine \
+    libbz \
+    update_metadata-protos \
+    update_engine-dbus-adaptor \
+    update_engine-dbus-libcros-client \
+    update_engine_client-dbus-proxies
+LOCAL_SHARED_LIBRARIES += \
+    libprotobuf-cpp-lite-rtti \
+    libdbus \
+    libcrypto \
+    libcurl \
+    libmetrics \
+    libssl \
+    libexpat \
+    libchromeos-policy
+LOCAL_SRC_FILES := \
+    main.cc
+$(eval $(update_engine_common))
+include $(BUILD_EXECUTABLE)
+
+# update_engine_client (type: executable)
+# ========================================================
+# update_engine console client.
+include $(CLEAR_VARS)
+LOCAL_MODULE := update_engine_client
+LOCAL_MODULE_CLASS := EXECUTABLES
+LOCAL_C_INCLUDES += \
+    $(LOCAL_PATH)/include
+LOCAL_STATIC_LIBRARIES += \
+    update_engine_client-dbus-proxies
+LOCAL_SRC_FILES := \
+    update_engine_client.cc
+$(eval $(update_engine_common))
+include $(BUILD_EXECUTABLE)
+
+# libpayload_generator (type: static_library)
+# ========================================================
+# server-side code. This is used for delta_generator and unittests but not
+# for any client code.
+include $(CLEAR_VARS)
+LOCAL_MODULE := libpayload_generator
+LOCAL_MODULE_CLASS := STATIC_LIBRARIES
+LOCAL_STATIC_LIBRARIES += \
+    libupdate_engine \
+    libbz \
+    update_metadata-protos \
+    update_engine-dbus-adaptor \
+    update_engine-dbus-libcros-client \
+    update_engine_client-dbus-proxies \
+    update_metadata-protos
+LOCAL_SHARED_LIBRARIES += \
+    libdbus \
+    libcrypto \
+    libcurl \
+    libmetrics \
+    libssl \
+    libexpat \
+    libchromeos-policy \
+    libprotobuf-cpp-lite-rtti \
+    libext2fs
+LOCAL_SRC_FILES := \
+    payload_generator/ab_generator.cc \
+    payload_generator/annotated_operation.cc \
+    payload_generator/blob_file_writer.cc \
+    payload_generator/block_mapping.cc \
+    payload_generator/cycle_breaker.cc \
+    payload_generator/delta_diff_generator.cc \
+    payload_generator/delta_diff_utils.cc \
+    payload_generator/ext2_filesystem.cc \
+    payload_generator/extent_ranges.cc \
+    payload_generator/extent_utils.cc \
+    payload_generator/full_update_generator.cc \
+    payload_generator/graph_types.cc \
+    payload_generator/graph_utils.cc \
+    payload_generator/inplace_generator.cc \
+    payload_generator/payload_file.cc \
+    payload_generator/payload_generation_config.cc \
+    payload_generator/payload_signer.cc \
+    payload_generator/raw_filesystem.cc \
+    payload_generator/tarjan.cc \
+    payload_generator/topological_sort.cc
+$(eval $(update_engine_common))
+include $(BUILD_STATIC_LIBRARY)
+
+# delta_generator (type: executable)
+# ========================================================
+# server-side delta generator.
+include $(CLEAR_VARS)
+LOCAL_MODULE := delta_generator
+LOCAL_MODULE_CLASS := EXECUTABLES
+LOCAL_STATIC_LIBRARIES += \
+    libpayload_generator \
+    libupdate_engine \
+    libbz \
+    update_metadata-protos \
+    update_engine-dbus-adaptor \
+    update_engine-dbus-libcros-client \
+    update_engine_client-dbus-proxies
+LOCAL_SHARED_LIBRARIES += \
+    libdbus \
+    libcrypto \
+    libcurl \
+    libmetrics \
+    libssl \
+    libexpat \
+    libchromeos-policy \
+    libprotobuf-cpp-lite-rtti \
+    libext2fs
+LOCAL_SRC_FILES := \
+    payload_generator/generate_delta_main.cc
+$(eval $(update_engine_common))
+include $(BUILD_EXECUTABLE)
+
+# update_engine_client-dbus-proxies (from generate-dbus-proxies.gypi)
+# ========================================================
+include $(CLEAR_VARS)
+LOCAL_MODULE := update_engine_client-dbus-proxies
+LOCAL_SRC_FILES := \
+    dbus_bindings/dbus-service-config.json \
+    dbus_bindings/org.chromium.UpdateEngineInterface.dbus-xml
+LOCAL_DBUS_PROXY_PREFIX := update_engine
+include $(BUILD_STATIC_LIBRARY)