3 Download the Native Client SDK
4 ==============================
6 This page provides an overview of the Native Client SDK, and instructions for
7 downloading and installing the SDK.
12 <a class="button-nacl button-download" href="https://storage.googleapis.com/nativeclient-mirror/nacl/nacl_sdk/nacl_sdk.zip">Download SDK Zip File</a>
20 The Native Client SDK includes:
22 - **Support for multiple Pepper versions** to compile for specific minimum
24 - **Update utility** to download new bundles and updates to existing bundles.
25 - **Toolchains** to compile for Portable Native Client (PNaCl), traditional
26 Native Client (NaCl), and for compiling architecture-specific Native Client
27 applications with glibc.
28 - **Examples** Including C or C++ source files and header files illustrating
29 how to use NaCl and Pepper, and Makefiles to build the example with each of
31 - **Tools** for validating Native Client modules and running modules from the
34 Follow the steps below to download and install the Native Client SDK.
46 Make sure that the Python executable is in your ``PATH`` variable. Python 3.x is
49 * On Mac and Linux, Python is likely preinstalled. Run the command ``python -V``
50 in a terminal window, and make sure that the version you have is 2.7.x.
51 * On Windows, you may need to install Python. Go to `https://www.python.org/
52 download/ <https://www.python.org/download/>`_ and select the latest 2.x
53 version. In addition, be sure to add the Python directory (for example,
54 ``C:\python27``) to the ``PATH`` `environment variable <https://en.wikipedia.
55 org/wiki/Environment_variable>`_. Run ``python -V`` from a command line to
56 verify that you properly configured the PATH variable.
63 * On the Mac, you need to install ``make`` on your system before you can build
64 and run the examples in the SDK. One easy way to get ``make``, along with
65 several other useful tools, is to install `Xcode Developer Tools
66 <https://developer.apple.com/technologies/tools/>`_. After installing Xcode,
67 go to the XCode menu, open the Preferences dialog box then select Downloads
68 and Components. Verify that Command Line Tools are installed.
69 * On Windows, the Native Client SDK includes a copy of GNU Make.
76 Native Client supports several operating systems, including Windows, Linux, OSX,
77 and ChromeOS. It supports several architectures including on x86-32, x86-64,
85 Chrome is released on a six week cycle, and developer versions of Chrome are
86 pushed to the public beta channel three weeks before each release. As with any
87 software, each release of Chrome may include changes to Native Client and the
88 Pepper interfaces that may require modification to existing applications.
89 However, modules compiled for one version of Pepper/Chrome should work with
90 subsequent versions of Pepper/Chrome. The SDK includes multiple versions of the
91 Pepper APIs to help developers make adjustments to API changes and take
92 advantage of new features: `stable </native-client/pepper_stable>`_, `beta
93 </native-client/pepper_beta>`_ and `dev </native-client/pepper_dev>`_.
95 .. _installing-the-sdk:
100 .. _downloading-and-unzipping:
102 Downloading and Unzipping
103 ^^^^^^^^^^^^^^^^^^^^^^^^^
105 #. Download the `SDK update zip file
106 <https://storage.googleapis.com/nativeclient-mirror/nacl/nacl_sdk/nacl_sdk.zip>`_.
110 * On Mac/Linux, run the command ``unzip nacl_sdk.zip`` in a terminal
112 * On Windows, right-click on the .zip file and select "Extract All...". A
113 dialog box opens; enter a location and click "Extract".
115 A directory is created called ``nacl_sdk`` with the following files and
118 * ``naclsdk`` (and ``naclsdk.bat`` for Windows) --- the update utility,
119 which is the command you run to download and update bundles.
120 * ``sdk_cache`` --- a directory with a manifest file that lists the bundles
121 you have already downloaded.
122 * ``sdk_tools`` --- the code run by the ``naclsdk`` command.
124 .. _installing-the-stable-bundle:
126 Installing the stable bundle
127 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
129 #. To see the SDK bundles that are available for download, go to the
130 ``nacl_sdk`` directory and run ``naclsdk`` with the ``list`` command. The SDK
131 includes a separate bundle for each version of Chrome/Pepper.
143 You should see output similar to this::
151 pepper_31 (post_stable)
152 pepper_32 (post_stable)
153 pepper_33 (post_stable)
154 pepper_34 (post_stable)
158 pepper_canary (canary)
159 bionic_canary (canary)
162 The sample output above shows that several bundles are available for
163 download, and that you have already installed the latest revision of the
164 ``sdk_tools`` bundle, which was included in the zip file. You never need to
165 update the ``sdk_tools`` bundle. It is updated automatically (if necessary)
166 whenever you run ``naclsdk``.
168 Bundles are labeled post-stable, stable, beta, dev, or canary. These labels
169 usually correspond to the current versions of Chrome. We recommend that you
170 develop against a "stable" bundle, because such bundles can be used by all
171 current Chrome users. Native Client is designed to be backward-compatible.For
172 example, applications developed with the ``pepper_37`` bundle can run in
173 Chrome 37, Chrome 38, etc..
175 #. Run ``naclsdk`` with the ``update`` command to download recommended bundles,
176 including the current "stable" bundle.
186 By default, ``naclsdk`` only downloads bundles that are recommended,
187 generally those that are "stable." For example, if the current "stable"
188 bundle is ``pepper_35``, then the ``update`` downloads that bundle. To
189 download the ``pepper_36`` bundle you must ask for it explicitly::
191 $ ./naclsdk update pepper_36
195 .. _updating-bundles:
200 #. Run ``naclsdk`` with the ``list`` command. This shows you the list of available
201 bundles and verifies which bundles you have installed.
211 An asterisk (*) next to a bundle indicates that there is an update available
220 pepper_31 (post_stable)
221 pepper_32 (post_stable)
222 pepper_33 (post_stable)
223 pepper_34 (post_stable)
224 I* pepper_35 (stable)
227 pepper_canary (canary)
228 bionic_canary (canary)
231 If you run ``naclsdk update`` now, it warns you with a message similar to
234 WARNING: pepper_35 already exists, but has an update available. Run update
235 with the --force option to overwrite the existing directory. Warning: This
236 will overwrite any modifications you have made within this directory.
238 #. To download and install the new bundle, run:
242 $ ./naclsdk update --force
246 > naclsdk update --force
248 .. _help-with-the-naclsdk-utility:
250 Help with the ``naclsdk`` utility
251 ---------------------------------
253 #. For more information about the ``naclsdk`` utility, run:
268 * Browse the `Release Notes <release-notes>`_ for important
269 information about the SDK and new bundles.
270 * If you're just starting with Native Client, we recommend reading the
271 `Technical Overview <../overview>`_ and walking through the
272 `Getting Started Tutorial <devguide/tutorial/tutorial-part1>`_.
273 * If you'd rather dive in, see
274 `Building Native Client Modules <devguide/devcycle/building>`_.