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 <p>Before you download and build the Android source, ensure your system meets
   the following requirements. Then see <a href="initializing.html">Establishing a
   Build Environment</a> for installation instructions by operating system.</p>

 <h2 id=hardware-requirements>Hardware requirements</h2>

 <p>Your development workstation should meet or exceed these hardware requirements:</p>

 <ul>

   <li>A 64-bit environment is required for Gingerbread (2.3.x) and newer
   versions, including the master
   branch. You can compile older versions on 32-bit systems.
   </li>

   <li>At least 100GB of free disk space to checkout the code and an extra 150GB
   to build it. If you conduct multiple builds or employ ccache, you will need
   even more space.</p>
   </li>

   <li>If you are running Linux in a virtual machine, you need at
   least 16GB of RAM/swap.
   </li>

 </ul>

 <h2 id=software-requirements>Software requirements</h2>

 <p>The <a
   href="https://android.googlesource.com/">Android Open Source Project
   (AOSP)</a> <code>master</code> branch is traditionally developed and tested
   on Ubuntu Long Term Support (LTS) releases, but other distributions may be
   used. See the list below for recommended versions.</p>

 <p>You workstation must have the software listed below. See <a
   href="initializing.html">Establishing a Build Environment</a> for
   additional required packages and the commands to install them.</p>

 <h3 id=operating-system>Operating system</h3>

 <p>Android is typically built with a GNU/Linux or Mac OS operating system. It is
   also possible to build Android in a virtual machine on unsupported systems such
   as Windows.</br>

 <h4 id=linux>GNU/Linux</h4>

   <ul>
     <li>Android 6.0 (Marshmallow) - AOSP master: Ubuntu 14.04 (Trusty)</li>
     <li>Android 2.3.x (Gingerbread) - Android 5.x (Lollipop): Ubuntu 12.04 (Precise)</li>
     <li>Android 1.5 (Cupcake) - Android 2.2.x (Froyo): Ubuntu 10.04 (Lucid)</li>
   </ul>

 <h4 id=mac>Mac OS (Intel/x86)</h4>

   <ul>
     <li>Android 6.0 (Marshmallow) - AOSP master: Mac OS v10.10 (Yosemite) or
     later with Xcode 4.5.2 and Command Line Tools</li>
     <li>Android 5.x (Lollipop): Mac OS v10.8 (Mountain Lion) with Xcode 4.5.2
     and Command Line Tools</li>
     <li>Android 4.1.x-4.3.x (Jelly Bean) - Android 4.4.x (KitKat): Mac OS v10.6
     (Snow Leopard) or Mac OS X v10.7 (Lion) and Xcode 4.2 (Apple's Developer
     Tools)</li>
     <li>Android 1.5 (Cupcake) - Android 4.0.x (Ice Cream Sandwich): Mac OS
     v10.5 (Leopard) or Mac OS X v10.6 (Snow Leopard) and the Mac OS X v10.5
     SDK</li>
   </ul>

 <h3 id=jdk>Java Development Kit (JDK)</h3>

 <p>Please note, since there are no available supported OpenJDK 8 packages for
   Ubuntu 14.04, the Ubuntu 15.04 packages must be installed manually. See <a
   href="initializing.html#for-ubuntu-14-04">JDK for Ubuntu LTS 14.04</a> for precise instructions.</p>
   <ul>
     <li>The master branch of Android in AOSP: Ubuntu - <a
     href="http://openjdk.java.net/install/">OpenJDK 8</a>, Mac OS - <a
     href="http://www.oracle.com/technetwork/java/javase/downloads/java-archive-javase8-2177648.html#jdk-8u45-oth-JPR">jdk
     8u45 or newer</a></li>
     <li>Android 5.x (Lollipop) - Android 6.0 (Marshmallow): Ubuntu - <a
     href="http://openjdk.java.net/install/">OpenJDK 7</a>, Mac OS - <a
     href="https://www.oracle.com/technetwork/java/javase/downloads/java-archive-downloads-javase7-521261.html#jdk-7u71-oth-JPR">jdk-7u71-macosx-x64.dmg</a></li>
     <li>Android 2.3.x (Gingerbread) - Android 4.4.x (KitKat): Ubuntu - <a
     href="http://www.oracle.com/technetwork/java/javase/archive-139210.html">Java JDK 6</a>, Mac OS - <a
     href="http://support.apple.com/kb/dl1572">Java JDK 6</a></li>
     <li>Android 1.5 (Cupcake) - Android 2.2.x (Froyo): Ubuntu - <a
     href="http://www.oracle.com/technetwork/java/javase/archive-139210.html">Java JDK 5</a></li>
   </ul>

 <h3 id=packages>Key packages</h3>
   <ul>
     <li>Python 2.6 -- 2.7 from <a href="http://www.python.org/download/">python.org</a></li>
     <li>GNU Make 3.81 -- 3.82 from <a
     href="http://ftp.gnu.org/gnu/make/">gnu.org</a>; Android 3.2.x (Honeycomb) and
     earlier will need to <a href="initializing.html#reverting-from-make-382">revert
     from make 3.82</a> to avoid build errors</li>
     <li>Git 1.7 or newer from <a href="http://git-scm.com/download">git-scm.com</a></li>
   </ul>

 <h3 id=binaries>Device binaries</h3>
 <p>Download previews, factory images, drivers, over-the-air (OTA) updates, and
 other blobs below. See <a
 href="/source/building.html#obtaining-proprietary-binaries">Obtaining
 proprietary binaries<a> for additional details.</p>
   <ul>
     <li><a
     href="https://developers.google.com/android/nexus/blobs-preview">Preview
     binaries (blobs)</a> - for AOSP <code>master</code> branch development</li>
     <li><a href="https://developers.google.com/android/nexus/images">Factory
     images</a> - for the supported devices running tagged AOSP release
     branches</li>
     <li><a href="https://developers.google.com/android/nexus/drivers">Binary
     hardware support files</a> - for devices running tagged AOSP release
     branches</li>
     <li><a href="https://developers.google.com/android/nexus/ota">OTA images</a>
     - for manually updating Nexus devices over the air</li>
   </ul>

   </body>
 </html>
	<html devsite>
	<head>
	<title>Requirements</title>
	<meta name="project_path" value="/_project.yaml" />
	<meta name="book_path" value="/_book.yaml" />
	</head>
	<body>
	<!--
	Copyright 2017 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.
	-->



	<p>Before you download and build the Android source, ensure your system meets
	the following requirements. Then see <a href="initializing.html">Establishing a
	Build Environment</a> for installation instructions by operating system.</p>

	<h2 id=hardware-requirements>Hardware requirements</h2>

	<p>Your development workstation should meet or exceed these hardware requirements:</p>

	<ul>

	<li>A 64-bit environment is required for Gingerbread (2.3.x) and newer
	versions, including the master
	branch. You can compile older versions on 32-bit systems.
	</li>

	<li>At least 100GB of free disk space to checkout the code and an extra 150GB
	to build it. If you conduct multiple builds or employ ccache, you will need
	even more space.</p>
	</li>

	<li>If you are running Linux in a virtual machine, you need at
	least 16GB of RAM/swap.
	</li>

	</ul>

	<h2 id=software-requirements>Software requirements</h2>

	<p>The <a
	href="https://android.googlesource.com/">Android Open Source Project
	(AOSP)</a> <code>master</code> branch is traditionally developed and tested
	on Ubuntu Long Term Support (LTS) releases, but other distributions may be
	used. See the list below for recommended versions.</p>

	<p>You workstation must have the software listed below. See <a
	href="initializing.html">Establishing a Build Environment</a> for
	additional required packages and the commands to install them.</p>

	<h3 id=operating-system>Operating system</h3>

	<p>Android is typically built with a GNU/Linux or Mac OS operating system. It is
	also possible to build Android in a virtual machine on unsupported systems such
	as Windows.</br>

	<h4 id=linux>GNU/Linux</h4>

	<ul>
	<li>Android 6.0 (Marshmallow) - AOSP master: Ubuntu 14.04 (Trusty)</li>
	<li>Android 2.3.x (Gingerbread) - Android 5.x (Lollipop): Ubuntu 12.04 (Precise)</li>
	<li>Android 1.5 (Cupcake) - Android 2.2.x (Froyo): Ubuntu 10.04 (Lucid)</li>
	</ul>

	<h4 id=mac>Mac OS (Intel/x86)</h4>

	<ul>
	<li>Android 6.0 (Marshmallow) - AOSP master: Mac OS v10.10 (Yosemite) or
	later with Xcode 4.5.2 and Command Line Tools</li>
	<li>Android 5.x (Lollipop): Mac OS v10.8 (Mountain Lion) with Xcode 4.5.2
	and Command Line Tools</li>
	<li>Android 4.1.x-4.3.x (Jelly Bean) - Android 4.4.x (KitKat): Mac OS v10.6
	(Snow Leopard) or Mac OS X v10.7 (Lion) and Xcode 4.2 (Apple's Developer
	Tools)</li>
	<li>Android 1.5 (Cupcake) - Android 4.0.x (Ice Cream Sandwich): Mac OS
	v10.5 (Leopard) or Mac OS X v10.6 (Snow Leopard) and the Mac OS X v10.5
	SDK</li>
	</ul>

	<h3 id=jdk>Java Development Kit (JDK)</h3>

	<p>Please note, since there are no available supported OpenJDK 8 packages for
	Ubuntu 14.04, the Ubuntu 15.04 packages must be installed manually. See <a
	href="initializing.html#for-ubuntu-14-04">JDK for Ubuntu LTS 14.04</a> for precise instructions.</p>
	<ul>
	<li>The master branch of Android in AOSP: Ubuntu - <a
	href="http://openjdk.java.net/install/">OpenJDK 8</a>, Mac OS - <a
	href="http://www.oracle.com/technetwork/java/javase/downloads/java-archive-javase8-2177648.html#jdk-8u45-oth-JPR">jdk
	8u45 or newer</a></li>
	<li>Android 5.x (Lollipop) - Android 6.0 (Marshmallow): Ubuntu - <a
	href="http://openjdk.java.net/install/">OpenJDK 7</a>, Mac OS - <a
	href="https://www.oracle.com/technetwork/java/javase/downloads/java-archive-downloads-javase7-521261.html#jdk-7u71-oth-JPR">jdk-7u71-macosx-x64.dmg</a></li>
	<li>Android 2.3.x (Gingerbread) - Android 4.4.x (KitKat): Ubuntu - <a
	href="http://www.oracle.com/technetwork/java/javase/archive-139210.html">Java JDK 6</a>, Mac OS - <a
	href="http://support.apple.com/kb/dl1572">Java JDK 6</a></li>
	<li>Android 1.5 (Cupcake) - Android 2.2.x (Froyo): Ubuntu - <a
	href="http://www.oracle.com/technetwork/java/javase/archive-139210.html">Java JDK 5</a></li>
	</ul>

	<h3 id=packages>Key packages</h3>
	<ul>
	<li>Python 2.6 -- 2.7 from <a href="http://www.python.org/download/">python.org</a></li>
	<li>GNU Make 3.81 -- 3.82 from <a
	href="http://ftp.gnu.org/gnu/make/">gnu.org</a>; Android 3.2.x (Honeycomb) and
	earlier will need to <a href="initializing.html#reverting-from-make-382">revert
	from make 3.82</a> to avoid build errors</li>
	<li>Git 1.7 or newer from <a href="http://git-scm.com/download">git-scm.com</a></li>
	</ul>

	<h3 id=binaries>Device binaries</h3>
	<p>Download previews, factory images, drivers, over-the-air (OTA) updates, and
	other blobs below. See <a
	href="/source/building.html#obtaining-proprietary-binaries">Obtaining
	proprietary binaries<a> for additional details.</p>
	<ul>
	<li><a
	href="https://developers.google.com/android/nexus/blobs-preview">Preview
	binaries (blobs)</a> - for AOSP <code>master</code> branch development</li>
	<li><a href="https://developers.google.com/android/nexus/images">Factory
	images</a> - for the supported devices running tagged AOSP release
	branches</li>
	<li><a href="https://developers.google.com/android/nexus/drivers">Binary
	hardware support files</a> - for devices running tagged AOSP release
	branches</li>
	<li><a href="https://developers.google.com/android/nexus/ota">OTA images</a>
	- for manually updating Nexus devices over the air</li>
	</ul>

	</body>
	</html>