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Diffstat (limited to 'openwrt/docs/buildroot-documentation.html')
| -rw-r--r-- | openwrt/docs/buildroot-documentation.html | 65 |
1 files changed, 46 insertions, 19 deletions
diff --git a/openwrt/docs/buildroot-documentation.html b/openwrt/docs/buildroot-documentation.html index bd9642202f..36f294e602 100644 --- a/openwrt/docs/buildroot-documentation.html +++ b/openwrt/docs/buildroot-documentation.html @@ -15,7 +15,7 @@ <h1>OpenWrt Buildroot</h1> </div> - <p>Usage and documentation by Felix Fietkau, based on uClibc Buildroot + <p>Usage and documentation by Felix Fietkau and Waldemar Brodkorb, based on uClibc Buildroot documentation by Thomas Petazzoni. Contributions from Karsten Kruse, Ned Ludd, Martin Herren.</p> @@ -129,8 +129,8 @@ <li>squashfs</li> </ul> <p><code>jffs2</code> contains a writable root filesystem, which will expand to - the size of your flash image. Note that you if you use the generic firmware - Image, you need to pick the right image for your Flash size, because of different + the size of your flash image. Note: if you use the generic firmware image, you + need to pick the right image for your flash size, because of different eraseblock sizes.</p> <p><code>squashfs</code> contains a read-only root filesystem using a modified @@ -197,7 +197,7 @@ configuration, and the latter is used if you have selected locale support.</li> - <li>Run the compilation again</li> + <li>Run the compilation again.</li> </ol> @@ -232,7 +232,9 @@ <li><b>target</b> (in the <code>target</code> directory) contains the Makefiles and associated files for software related to the generation of - the target root filesystem image. Two types of filesystems are supported + the target root filesystem image and the linux kernel for the different + system on a chip boards, used in the Wireless Routers. + Two types of filesystems are supported : jffs2 and squashfs. </ul> @@ -276,7 +278,7 @@ <li>Create the target directory (<code>build_ARCH/root/</code> by default) and the target filesystem skeleton. This directory will contain - the final root filesystem. To setup it up, it first deletes it, then it + the final root filesystem. To set it up, it first deletes it, then it copies the skeleton available in <code>target/default/target_skeleton</code> and then removes useless <code>CVS/</code> directories.</li> @@ -302,10 +304,10 @@ <p>For example, you may add the following to your <code>.bashrc</code> (considering you're building for the MIPS architecture and that Buildroot is located in - <code>~/buildroot/</code>) :</p> + <code>~/openwrt/</code>) :</p> <pre> -export PATH=$PATH:~/buildroot/staging_dir_mipsel/bin/ +export PATH=$PATH:~/openwrt/staging_dir_mipsel/bin/ </pre> <p>Then you can simply do :</p> @@ -344,7 +346,7 @@ mipsel-linux-uclibc-gcc -o foo foo.c downloaded by the <i>Makefiles</i> are all stored in the <code>DL_DIR</code> which by default is the <code>dl</code> directory. It's useful for example if you want to keep a complete - version of Buildroot which is know to be working with the + version of Buildroot which is known to be working with the associated tarballs. This will allow you to regenerate the toolchain and the target filesystem with exactly the same versions.</p> @@ -369,15 +371,39 @@ mipsel-linux-uclibc-gcc -o foo foo.c <pre> config BR2_PACKAGE_FOO - tristate "foo" - default n + tristate "foo - some nice tool" + default m if CONFIG_DEVEL help This is a comment that explains what foo is. </pre> + <p>If you depend on other software or library inside the Buildroot, it + is important that you automatically select these packages in your + <code>Config.in</code>. Example if foo depends on bar library: + </p> +<pre> +config BR2_PACKAGE_FOO + tristate "foo - some nice tool" + default m if CONFIG_DEVEL + select BR2_PACKAGE_LIBBAR + help + This is a comment that explains what foo is. +</pre> + <p>Of course, you can add other options to configure particular things in your software.</p> + <h3><code>Config.in</code> in the package directory</h3> + + <p>To add your package to the configuration tool, you need + to add the following line to <code>package/Config.in</code>, + please add it to a section, which fits the purpose of foo: + +<pre> +comment "Networking" +source "package/foo/Config.in" +</pre> + <h3><code>Makefile</code> in the package directory</h3> <p>To add your package to the build process, you need to edit @@ -391,18 +417,18 @@ package-$(BR2_PACKAGE_FOO) += foo <p>As you can see, this short line simply adds the target <code>foo</code> to the list of targets handled by OpenWrt Buildroot.</p> - - <p>In addition to the default dependencies, you make your package - depend on another package (e.g. a library) by adding a line: + <p>In addition to the default dependencies, you make your package + depend on another package (e.g. a library) by adding a line: <pre> foo-compile: bar-compile </pre> - <h3>The <i>.control</i> file</h3> + <h3>The ipkg control file</h3> <p>Additionally, you need to create a control file which contains information about your package, readable by the <i>ipkg</i> package - utility.</p> + utility. It should be created as file: + <code>package/foo/ipkg/foo.control</code></p> <p>The file looks like this</p> @@ -412,12 +438,14 @@ foo-compile: bar-compile 3 Section: net 4 Maintainer: Foo Software <foo@foosoftware.com> 5 Source: http://foosoftware.com - 6 Description: Your Package Description + 6 Depends: libbar + 7 Description: Package Description </pre> <p>You can skip the usual <code>Version:</code> and <code>Architecture</code> fields, as they will be generated by the <code>make-ipkg-dir.sh</code> script - called from your Makefile</p> + called from your Makefile. The Depends field is important, so that ipkg will + automatically fetch all dependend software on your target system.</p> <h3>The real <i>Makefile</i></h3> @@ -434,7 +462,6 @@ foo-compile: bar-compile 4 PKG_VERSION:=1.0 5 PKG_RELEASE:=1 6 PKG_MD5SUM:=4584f226523776a3cdd2fb6f8212ba8d - 7 8 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz 9 PKG_SOURCE_URL:=http://www.foosoftware.org/downloads 10 PKG_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(PKG_VERSION) |