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- // Copyright 2015 Google Inc. All rights reserved.
- //
- // 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.
- // Soong is a builder for Android that uses Blueprint to parse Blueprints
- // files and Ninja to do the dependency tracking and subprocess management.
- // Soong itself is responsible for converting the modules read by Blueprint
- // into build rules, which will be written to a build.ninja file by Blueprint.
- //
- // Android build concepts:
- //
- // Device
- // A device is a piece of hardware that will be running Android. It may specify
- // global settings like architecture, filesystem configuration, initialization
- // scripts, and device drivers. A device may support all variants of a single
- // piece of hardware, or multiple devices may be used for different variants.
- // A build is never targeted directly at a device, it is always targeted at a
- // "product".
- //
- // Product
- // A product is a configuration of a device, often for a specific market or
- // use case. It is sometimes referred to as a "SKU". A product defines
- // global settings like supported languages, supported use cases, preinstalled
- // modules, and user-visible behavior choices. A product selects one and only
- // one device.
- //
- // Module
- // A module is a definition of something to be built. It may be a C library or
- // binary, a java library, an Android app, etc. A module may be built for multiple
- // targets, even in a single build, for example host and device, or 32-bit device
- // and 64-bit device.
- //
- // Installed module
- // An installed module is one that has been requested by the selected product,
- // or a dependency of an installed module.
- //
- // Target architecture
- // The target architecture is the preferred architecture supported by the selected
- // device. It is most commonly 32-bit arm, but may also be 64-bit arm, 32-bit
- // x86, or 64-bit x86.
- //
- // Secondary architecture
- // The secondary architecture specifies the architecture to compile a second copy
- // of some modules for devices that support multiple architectures, for example
- // 64-bit devices that also support 32-bit binaries.
- package soong
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