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1 | .. SPDX-License-Identifier: CC-BY-2.0-UK | ||
2 | |||
3 | ********************** | ||
4 | Using the Standard SDK | ||
5 | ********************** | ||
6 | |||
7 | This chapter describes the standard SDK and how to install it. | ||
8 | Information includes unique installation and setup aspects for the | ||
9 | standard SDK. | ||
10 | |||
11 | .. note:: | ||
12 | |||
13 | For a side-by-side comparison of main features supported for a | ||
14 | standard SDK as compared to an extensible SDK, see the " | ||
15 | Introduction | ||
16 | " section. | ||
17 | |||
18 | You can use a standard SDK to work on Makefile and Autotools-based | ||
19 | projects. See the "`Using the SDK Toolchain | ||
20 | Directly <#sdk-working-projects>`__" chapter for more information. | ||
21 | |||
22 | .. _sdk-standard-sdk-intro: | ||
23 | |||
24 | Why use the Standard SDK and What is in It? | ||
25 | =========================================== | ||
26 | |||
27 | The Standard SDK provides a cross-development toolchain and libraries | ||
28 | tailored to the contents of a specific image. You would use the Standard | ||
29 | SDK if you want a more traditional toolchain experience as compared to | ||
30 | the extensible SDK, which provides an internal build system and the | ||
31 | ``devtool`` functionality. | ||
32 | |||
33 | The installed Standard SDK consists of several files and directories. | ||
34 | Basically, it contains an SDK environment setup script, some | ||
35 | configuration files, and host and target root filesystems to support | ||
36 | usage. You can see the directory structure in the "`Installed Standard | ||
37 | SDK Directory | ||
38 | Structure <#sdk-installed-standard-sdk-directory-structure>`__" section. | ||
39 | |||
40 | .. _sdk-installing-the-sdk: | ||
41 | |||
42 | Installing the SDK | ||
43 | ================== | ||
44 | |||
45 | The first thing you need to do is install the SDK on your :term:`Build | ||
46 | Host` by running the ``*.sh`` installation script. | ||
47 | |||
48 | You can download a tarball installer, which includes the pre-built | ||
49 | toolchain, the ``runqemu`` script, and support files from the | ||
50 | appropriate :yocto_dl:`toolchain </releases/yocto/yocto-3.1.2/toolchain/>` directory within | ||
51 | the Index of Releases. Toolchains are available for several 32-bit and | ||
52 | 64-bit architectures with the ``x86_64`` directories, respectively. The | ||
53 | toolchains the Yocto Project provides are based off the | ||
54 | ``core-image-sato`` and ``core-image-minimal`` images and contain | ||
55 | libraries appropriate for developing against that image. | ||
56 | |||
57 | The names of the tarball installer scripts are such that a string | ||
58 | representing the host system appears first in the filename and then is | ||
59 | immediately followed by a string representing the target architecture. | ||
60 | :: | ||
61 | |||
62 | poky-glibc-host_system-image_type-arch-toolchain-release_version.sh | ||
63 | |||
64 | Where: | ||
65 | host_system is a string representing your development system: | ||
66 | |||
67 | i686 or x86_64. | ||
68 | |||
69 | image_type is the image for which the SDK was built: | ||
70 | |||
71 | core-image-minimal or core-image-sato. | ||
72 | |||
73 | arch is a string representing the tuned target architecture: | ||
74 | |||
75 | aarch64, armv5e, core2-64, i586, mips32r2, mips64, ppc7400, or cortexa8hf-neon. | ||
76 | |||
77 | release_version is a string representing the release number of the Yocto Project: | ||
78 | |||
79 | 3.1.2, 3.1.2+snapshot | ||
80 | |||
81 | For example, the following SDK installer is for a 64-bit | ||
82 | development host system and a i586-tuned target architecture based off | ||
83 | the SDK for ``core-image-sato`` and using the current DISTRO snapshot: | ||
84 | :: | ||
85 | |||
86 | poky-glibc-x86_64-core-image-sato-i586-toolchain-DISTRO.sh | ||
87 | |||
88 | .. note:: | ||
89 | |||
90 | As an alternative to downloading an SDK, you can build the SDK | ||
91 | installer. For information on building the installer, see the " | ||
92 | Building an SDK Installer | ||
93 | " section. | ||
94 | |||
95 | The SDK and toolchains are self-contained and by default are installed | ||
96 | into the ``poky_sdk`` folder in your home directory. You can choose to | ||
97 | install the extensible SDK in any location when you run the installer. | ||
98 | However, because files need to be written under that directory during | ||
99 | the normal course of operation, the location you choose for installation | ||
100 | must be writable for whichever users need to use the SDK. | ||
101 | |||
102 | The following command shows how to run the installer given a toolchain | ||
103 | tarball for a 64-bit x86 development host system and a 64-bit x86 target | ||
104 | architecture. The example assumes the SDK installer is located in | ||
105 | ``~/Downloads/`` and has execution rights. | ||
106 | |||
107 | .. note:: | ||
108 | |||
109 | If you do not have write permissions for the directory into which you | ||
110 | are installing the SDK, the installer notifies you and exits. For | ||
111 | that case, set up the proper permissions in the directory and run the | ||
112 | installer again. | ||
113 | |||
114 | :: | ||
115 | |||
116 | $ ./Downloads/poky-glibc-x86_64-core-image-sato-i586-toolchain-3.1.2.sh | ||
117 | Poky (Yocto Project Reference Distro) SDK installer version 3.1.2 | ||
118 | =============================================================== | ||
119 | Enter target directory for SDK (default: /opt/poky/3.1.2): | ||
120 | You are about to install the SDK to "/opt/poky/3.1.2". Proceed [Y/n]? Y | ||
121 | Extracting SDK........................................ ..............................done | ||
122 | Setting it up...done | ||
123 | SDK has been successfully set up and is ready to be used. | ||
124 | Each time you wish to use the SDK in a new shell session, you need to source the environment setup script e.g. | ||
125 | $ . /opt/poky/3.1.2/environment-setup-i586-poky-linux | ||
126 | |||
127 | Again, reference the "`Installed Standard SDK Directory | ||
128 | Structure <#sdk-installed-standard-sdk-directory-structure>`__" section | ||
129 | for more details on the resulting directory structure of the installed | ||
130 | SDK. | ||
131 | |||
132 | .. _sdk-running-the-sdk-environment-setup-script: | ||
133 | |||
134 | Running the SDK Environment Setup Script | ||
135 | ======================================== | ||
136 | |||
137 | Once you have the SDK installed, you must run the SDK environment setup | ||
138 | script before you can actually use the SDK. This setup script resides in | ||
139 | the directory you chose when you installed the SDK, which is either the | ||
140 | default ``/opt/poky/3.1.2`` directory or the directory you chose during | ||
141 | installation. | ||
142 | |||
143 | Before running the script, be sure it is the one that matches the | ||
144 | architecture for which you are developing. Environment setup scripts | ||
145 | begin with the string "``environment-setup``" and include as part of | ||
146 | their name the tuned target architecture. As an example, the following | ||
147 | commands set the working directory to where the SDK was installed and | ||
148 | then source the environment setup script. In this example, the setup | ||
149 | script is for an IA-based target machine using i586 tuning: | ||
150 | :: | ||
151 | |||
152 | $ source /opt/poky/3.1.2/environment-setup-i586-poky-linux | ||
153 | |||
154 | When you run the | ||
155 | setup script, the same environment variables are defined as are when you | ||
156 | run the setup script for an extensible SDK. See the "`Running the | ||
157 | Extensible SDK Environment Setup | ||
158 | Script <#sdk-running-the-extensible-sdk-environment-setup-script>`__" | ||
159 | section for more information. | ||