aboutsummaryrefslogtreecommitdiff
path: root/docs
diff options
context:
space:
mode:
authorGravatar Mike Frysinger <vapier@gentoo.org>2004-12-27 19:01:52 +0000
committerGravatar Mike Frysinger <vapier@gentoo.org>2004-12-27 19:01:52 +0000
commitfdb390e9716ab256bf67cb3013a5f4bf9f81fb71 (patch)
tree7a080a8d8b3024373d0002cddbd11c93d961fe42 /docs
parent6d9728e843fb6fee4d3c62235862ef524292d365 (diff)
downloadbuildroot-fdb390e9716ab256bf67cb3013a5f4bf9f81fb71.tar.gz
buildroot-fdb390e9716ab256bf67cb3013a5f4bf9f81fb71.tar.bz2
move docs to subdir
Diffstat (limited to 'docs')
-rw-r--r--docs/README18
-rw-r--r--docs/buildroot-documentation.html607
-rw-r--r--docs/stylesheet.css65
3 files changed, 690 insertions, 0 deletions
diff --git a/docs/README b/docs/README
new file mode 100644
index 0000000000..0c7fb4cd4b
--- /dev/null
+++ b/docs/README
@@ -0,0 +1,18 @@
+To build and use the buildroot stuff, do the following:
+
+1) run 'make'
+2) select which packages you wish to compile
+3) run 'make'
+4) wait while it compiles
+5) Use your shiney new root filesystem. Depending on which sortof
+ root filesystem you selecter, you may want to loop mount it,
+ chroot into it, loop mount it and then nfs mount that on your
+ target device, burn it to flash, or whatever is appropriate
+ for your target system.
+
+You do not need to be root to build or run buildroot. Have fun!
+
+ -Erik
+
+Please feed suggestions, bug reports, insults, and bribes back to:
+ Erik Andersen <andersen@codepoet.org>
diff --git a/docs/buildroot-documentation.html b/docs/buildroot-documentation.html
new file mode 100644
index 0000000000..23c79ce238
--- /dev/null
+++ b/docs/buildroot-documentation.html
@@ -0,0 +1,607 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+ "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+ <title>Buildroot - Usage and documentation</title>
+ <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
+ <link rel="stylesheet" type="text/css" href="stylesheet.css" />
+</head>
+
+<body>
+ <div class="main">
+ <div class="titre">
+ <h1>Buildroot</h1>
+ </div>
+
+ <p>Usage and documentation by Thomas Petazzoni. Contributions from
+ Karsten Kruse, Ned Ludd, Martin Herren.</p>
+
+ <p><small>Last modification : $Date: 2004/12/27 19:01:52 $</small></p>
+
+ <ul>
+ <li><a href="#about">About Buildroot</a></li>
+ <li><a href="#download">Obtaining Buildroot</a></li>
+ <li><a href="#using">Using Buildroot</a></li>
+ <li><a href="#custom_targetfs">Customizing the target filesystem</a></li>
+ <li><a href="#custom_busybox">Customizing the Busybox
+ configuration</a></li>
+ <li><a href="#custom_uclibc">Customizing the uClibc
+ configuration</a></li>
+ <li><a href="#buildroot_innards">How Buildroot works</a></li>
+ <li><a href="#toolchain_standalone">Using the uClibc toolchain without
+ Buildroot</a></li>
+ <li><a href="#downloaded_packages">Location of downloaded packages</a></li>
+ <li><a href="#add_software">Extending Buildroot with more
+ Software</a></li>
+ <li><a href="#links">Ressources</a></li>
+ </ul>
+
+ <h2><a name="about" id="about"></a>About Buildroot</h2>
+
+ <p>Buildroot is a set of Makefiles and patches that allows to easily
+ generate both a cross-compilation toolchain and a root filesystem for your
+ target. The cross-compilation toolchain uses uClibc (<a href=
+ "http://www.uclibc.org/">http://www.uclibc.org/</a>), a tiny C standard
+ library.</p>
+
+ <p>Buildroot is useful mainly for people working with embedded systems.
+ Embedded systems often use processors that are not the regular x86
+ processors everyone is used to have on his PC. It can be PowerPC
+ processors, MIPS processors, ARM processors, etc.</p>
+
+ <p>A compilation toolchain is the set of tools that allows to
+ compile code for your system. It consists of a compiler (in our
+ case, <code>gcc</code>), binary utils like assembler and linker
+ (in our case, <code>binutils</code>) and a C standard library (for
+ example <a href="http://www.gnu.org/software/libc/libc.html">GNU
+ Libc</a>, <a href="http://www.uclibc.org">uClibc</a> or <a
+ href="http://www.fefe.de/dietlibc/">dietlibc</a>). The system
+ installed on your development station certainly already has a
+ compilation toolchain that you can use to compile application that
+ runs on your system. If you're using a PC, your compilation
+ toolchain runs on an x86 processor and generates code for a x86
+ processor. Under most Linux systems, the compilation toolchain
+ uses the GNU libc as C standard library. This compilation
+ toolchain is called the "host compilation toolchain", and more
+ generally, the machine on which it is running, and on which you're
+ working is called the "host system". The compilation toolchain is
+ provided by your distribution, and Buildroot has nothing to do
+ with it.</p>
+
+ <p>As said above, the compilation toolchain that comes with your system
+ runs and generates code for the processor of your host system. As your
+ embedded system has a different processor, you need a cross-compilation
+ toolchain: it's a compilation toolchain that runs on your host system but
+ that generates code for your target system (and target processor). For
+ example, if your host system uses x86 and your target system uses ARM, the
+ regular compilation toolchain of your host runs on x86 and generates code
+ for x86, while the cross-compilation toolchain runs on x86 and generates
+ code for ARM.</p>
+
+ <p>Even if your embedded system uses a x86 processor, you might interested
+ in Buildroot, for two reasons:</p>
+
+ <ul>
+ <li>The compilation toolchain of your host certainly uses the GNU Libc
+ which is a complete but huge C standard library. Instead of using GNU
+ Libc on your target system, you can use uClibc which is a tiny C standard
+ library. If you want to use this C library, then you need a compilation
+ toolchain to generate binaries linked with it. Buildroot can do it for
+ you.</li>
+
+ <li>Buildroot automates the building of a root filesystem with all needed
+ tools like busybox. It makes it much easier than doing it by hand.</li>
+ </ul>
+
+ <p>You might wonder why such a tool is needed when you can compile
+ <code>gcc</code>, <code>binutils</code>, uClibc and all the tools by hand.
+ Of course, doing so is possible. But dealing with all configure options,
+ with all problems of every <code>gcc</code> or <code>binutils</code>
+ version it very time-consuming and uninteresting. Buildroot automates this
+ process through the use of Makefiles, and has a collection of patches for
+ each <code>gcc</code> and <code>binutils</code> version to make them work
+ on most architectures.</p>
+
+ <h2><a name="download" id="download"></a>Obtaining Buildroot</h2>
+
+ <p>Buildroot is available as daily CVS snapshots or directly using
+ CVS.</p>
+
+ <p>The latest snapshot is always available at <a
+ href="http://uclibc.org/downloads/snapshots/buildroot-snapshot.tar.bz2">http://uclibc.org/downloads/snapshots/buildroot-snapshot.tar.bz2</a>,
+ and previous snapshots are also available at <a
+ href="http://uclibc.org/downloads/snapshots/">http://uclibc.org/downloads/snapshots/</a>.</p>
+
+ <p>To download Buildroot using CVS, you can simply follow
+ the rules described on the "Accessing CVS"-page (<a href=
+ "http://www.uclibc.org/cvs_anon.html">http://www.uclibc.org/cvs_anon.html</a>)
+ of the uClibc website (<a href=
+ "http://www.uclibc.org">http://www.uclibc.org</a>), and download the
+ <code>buildroot</code> CVS module. For the impatient, here's a quick
+ recipe:</p>
+
+ <pre>
+ $ cvs -d:pserver:anonymous@uclibc.org:/var/cvs login
+ $ cvs -z3 -d:pserver:anonymous@uclibc.org:/var/cvs co buildroot
+</pre>
+
+ <h2><a name="using" id="using"></a>Using Buildroot</h2>
+
+ <p>Buildroot has a nice configuration tool similar to the one you can find
+ in the Linux Kernel (<a href=
+ "http://www.kernel.org/">http://www.kernel.org/</a>) or in Busybox
+ (<a href="http://www.busybox.org/">http://www.busybox.org/</a>). Note that
+ you can run everything as a normal user. There is no need to be root to
+ configure and use Buildroot. The first step is to run the configuration
+ assistant:</p>
+
+<pre>
+ $ make menuconfig
+</pre>
+
+ <p>For each entry of the configuration tool, you can find associated help
+ that describes the purpose of the entry.</p>
+
+ <p>Once everything is configured, the configuration tool has generated a
+ <code>.config</code> file that contains the description of your
+ configuration. It will be used by the Makefiles to do what's needed.</p>
+
+ <p>Let's go:</p>
+
+<pre>
+ $ make
+</pre>
+
+ <p>This command will download, configure and compile all the selected
+ tools, and finally generate a target filesystem. The target filesystem will
+ be named <code>root_fs_ARCH.EXT</code> where <code>ARCH</code> is your
+ architecture and <code>EXT</code> depends on the type of target filesystem
+ selected in the <code>Target options</code> section of the configuration
+ tool.</p>
+
+ <h2><a name="custom_targetfs" id="custom_targetfs"></a>Customizing the
+ target filesystem</h2>
+
+ <p>There are two ways to customize the resulting target filesystem:</p>
+
+ <ul>
+ <li>Customize the target filesystem directly, and rebuild the image. The
+ target filesystem is available under <code>build_ARCH/root/</code> where
+ <code>ARCH</code> is the chosen target architecture. You can simply make
+ your changes here, and run make afterwards, which will rebuild the target
+ filesystem image. This method allows to do everything on the target
+ filesystem, but if you decide to completely rebuild your toolchain and
+ tools, these changes will be lost.</li>
+
+ <li>Customize the target filesystem skeleton, available under
+ <code>target/default/target_skeleton/</code>. You can customize
+ configuration files or other stuff here. However, the full file hierarchy
+ is not yet present, because it's created during the compilation process.
+ So you can't do everything on this target filesystem skeleton, but
+ changes to it remains even you completely rebuild the cross-compilation
+ toolchain and the tools.<br />
+ You can also customize the <code>target/default/device_table.txt</code>
+ file which is used by the tools that generate the target filesystem image
+ to properly set permissions and create device nodes. The
+ <code>target/default/skel.tar.gz</code> file contains the main
+ directories of a root filesystem and there is no obvious reason for which
+ it should be changed. These main directories are in an tarball inside of
+ inside the skeleton because it contains symlinks that would be broken
+ otherwise.</li>
+ </ul>
+
+ <h2><a name="custom_busybox" id="custom_busybox"></a>Customizing the
+ Busybox configuration</h2>
+
+ <p>Busybox is very configurable, and you may want to customize it. You can
+ follow these simple steps to do it. It's not an optimal way, but it's
+ simple and it works.</p>
+
+ <ol>
+ <li>Make a first compilation of buildroot with busybox without trying to
+ customize it.</li>
+
+ <li>Go into <code>build_ARCH/busybox/</code> and run <code>make
+ menuconfig</code>. The nice configuration tool appears and you can
+ customize everything.</li>
+
+ <li>Copy the <code>.config</code> file to
+ <code>package/busybox/busybox.config</code> so that your customized
+ configuration will remains even if you remove the cross-compilation
+ toolchain.</li>
+
+ <li>Run the compilation of buildroot again.</li>
+ </ol>
+
+ <p>Otherwise, you can simply change the
+ <code>package/busybox/busybox.config</code> file if you know the options
+ you want to change without using the configuration tool.</p>
+
+ <h2><a name="custom_uclibc" id="custom_uclibc"></a>Customizing the uClibc
+ configuration</h2>
+
+ <p>Just like <a href="#custom_busybox">BusyBox</a>, <a
+ href="http://www.uclibc.org">uClibc</a> offers a lot of
+ configuration options. They allow to select various
+ functionalities, depending on your needs and limitations.</p>
+
+ <p>The easiest way to modify the configuration of uClibc is to
+ follow these steps :</p>
+
+ <ol>
+
+ <li>Make a first compilation of buildroot without trying to
+ customize uClibc.</li>
+
+ <li>Go into the directory
+ <code>toolchain_build_ARCH/uClibc/</code> and run <code>make
+ menuconfig</code>. The nice configuration assistant, similar to
+ the one used in the Linux Kernel or in Buildroot appears. Make
+ your configuration as appropriate.</li>
+
+ <li>Copy the <code>.config</code> file to
+ <code>toolchain/uClibc/uClibc.config</code> or
+ <code>toolchain/uClibc/uClibc.config-locale</code>. The former
+ is used if you haven't selected locale support in Buildroot
+ configuration, and the latter is used if you have selected
+ locale support.
+
+ <li>Run the compilation of Buildroot again</li>
+
+ </ol>
+
+ <p>Otherwise, you can simply change
+ <code>toolchain/uClibc/uClibc.config</code> or
+ <code>toolchain/uClibc/uClibc.config-locale</code> without running
+ the configuration assistant.</p>
+
+ <h2><a name="buildroot_innards" id="buildroot_innards"></a>How Buildroot
+ works</h2>
+
+ <p>As said above, Buildroot is basically a set of Makefiles that download,
+ configure and compiles software with the correct options. It also includes
+ some patches for various softwares, mainly the ones involved in the
+ cross-compilation tool chain (<code>gcc</code>, <code>binutils</code> and
+ uClibc).</p>
+
+ <p>There is basically one Makefile per software, and they are named with
+ the <code>.mk</code> extension. Makefiles are split into three
+ sections:</p>
+
+ <ul>
+ <li><b>package</b> (in the <code>package/</code> directory) contains the
+ Makefiles and associated files for all user-space tools that Buildroot
+ can compile and add to the target root filesystem. There is one
+ sub-directory per tool.</li>
+
+ <li><b>toolchain</b> (in the <code>toolchain/</code> directory) contains
+ the Makefiles and associated files for all softwares related to the
+ cross-compilation toolchain : <code>binutils</code>, <code>ccache</code>,
+ <code>gcc</code>, <code>gdb</code>, <code>kernel-headers</code> and
+ <code>uClibc</code>.</li>
+
+ <li><b>target</b> (in the <code>target</code> directory) contains the
+ Makefiles and associated files for softwares related to the generation of
+ the target root filesystem image. Four types of filesystems are supported
+ : ext2, jffs2, cramfs and squashfs. For each of them, there's a
+ sub-directory with the required files. There is also a
+ <code>default/</code> directory that contains the target filesystem
+ skeleton.</li>
+ </ul>
+
+ <p>Each directory contains at least 3 files :</p>
+
+ <ul>
+ <li><code>something.mk</code> is the Makefile that downloads, configures,
+ compiles and installs the software <code>something</code>.</li>
+
+ <li><code>Config.in</code> is a part of the configuration tool
+ description file. It describes the option related to the current
+ software.</li>
+
+ <li><code>Makefile.in</code> is a part of Makefile that sets various
+ variables according to the configuration given through the configuration
+ tool. For most tools it simply involves adding the name of the tool to
+ the <code>TARGETS</code> variable.</li>
+ </ul>
+
+ <p>The main Makefile do the job through the following steps (once the
+ configuration is done):</p>
+
+ <ol>
+ <li>Create the download directory (<code>dl/</code> by default). This is
+ where the tarballs will be downloaded. It is interesting to know that the
+ tarballs are in this directory because it may be useful to save them
+ somewhere to avoid further downloads.</li>
+
+ <li>Create the build directory (<code>build_ARCH/</code> by default,
+ where <code>ARCH</code> is your architecture). This is where all
+ user-space tools while be compiled.</li>
+
+ <li>Create the toolchain build directory
+ (<code>toolchain_build_ARCH/</code> by default, where <code>ARCH</code>
+ is your architecture). This is where the cross compilation toolchain will
+ be compiled.</li>
+
+ <li>Setup the staging directory (<code>build_ARCH/staging_dir/</code> by
+ default). This is where the cross-compilation toolchain will be
+ installed. If you want to use the same cross-compilation toolchain for
+ other purposes, such as compiling third-party applications, you can add
+ <code>build_ARCH/staging_dir/bin</code> to your PATH, and then use
+ <code>arch-linux-gcc</code> to compile your application. In order to
+ setup this staging directory, it first removes it, and then it creates
+ various subdirectories and symlinks inside it.</li>
+
+ <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
+ uncompress the <code>target/default/skel.tar.gz</code> file to create the
+ main subdirectories and symlinks, copies the skeleton available in
+ <code>target/default/target_skeleton</code> and then removes useless
+ <code>CVS/</code> directories.</li>
+
+ <li>Make the <code>TARGETS</code> dependency. This is where all the job
+ is done : all <code>Makefile.in</code> files "subscribe" targets into
+ this global variable, so that the needed tools gets compiled.</li>
+ </ol>
+
+ <h2><a name="toolchain_standalone" id="toolchain_standalone"></a>Using the
+ uClibc toolchain without buildroot</h2>
+
+ <p>By default, the cross-compilation toolchain is generated inside
+ <code>build_ARCH/staging_dir/</code>. But sometimes, it may be useful to
+ install it somewhere else, so that it can be used to compile other programs
+ or by other users. Moving the <code>build_ARCH/staging_dir/</code>
+ directory elsewhere is <b>not possible</b>, because they are some hardcoded
+ paths in the toolchain configuration.</p>
+
+ <p>If you want to use the generated toolchain for other purposes,
+ you can configure Buildroot to generate it elsewhere using the
+ option of the configuration tool : <code>Build options ->
+ Toolchain and header file location</code>, which defaults to
+ <code>$(BUILD_DIR)/staging_dir/</code>.</p>
+
+ <h2><a name="downloaded_packages"
+ id="downloaded_packages"></a>Location of downloaded packages</h2>
+
+ <p>It might be useful to know that the various tarballs that are
+ downloaded by the <i>Makefiles</i> are all stored in the
+ <code>DL_DIR</code> which by default is the <code>dl</code>
+ directory. It's useful for example if you want to keep a complete
+ version of Buildroot which is know to be working with the
+ associated tarballs. This will allow you to regenerate the
+ toolchain and the target filesystem with exactly the same
+ versions.</p>
+
+ <h2><a name="add_software" id="add_software"></a>Extending Buildroot with
+ more software</h2>
+
+ <p>This section will only consider the case in which you want to
+ add user-space software.</p>
+
+ <h3>Package directory</h3>
+
+ <p>First of all, create a directory under the <code>package</code>
+ directory for your software, for example <code>foo</code>.</p>
+
+ <h3><code>Config.in</code> file</h3>
+
+ <p>Then, create a file named <code>Config.in</code>. This file
+ will contain the portion of options description related to our
+ <code>foo</code> software that will be used and displayed in the
+ configuration tool. It should basically contain :</p>
+
+<pre>
+config BR2_PACKAGE_FOO
+ bool "foo"
+ default n
+ help
+ This is a comment that explains what foo is.
+</pre>
+
+ <p>Of course, you can add other options to configure particular
+ things in your software.</p>
+
+ <h3><code>Makefile.in</code> file</h3>
+
+ <p>Then, write a <code>Makefile.in</code> file. Basically, this is
+ a very short <i>Makefile</i> that adds the name of the software to
+ the list of <code>TARGETS</code> that Buildroot will generate. In
+ fact, the name of the software is the the identifier of the target
+ inside the real <i>Makefile</i> that will do everything (download,
+ compile, install), and that we study below. Back to
+ <code>Makefile.in</code>, here is an example :
+
+<pre>
+ifeq ($(strip $(BR2_PACKAGE_FOO)),y)
+TARGETS+=foo
+endif
+</pre>
+
+ <p>As you can see, this short <i>Makefile</i> simply adds the
+ target <code>foo</code> to the list of targets handled by Buildroot
+ if software <i>foo</i> was selected using the configuration tool.</p>
+
+ <h3>The real <i>Makefile</i></h3>
+
+ <p>Finally, here's the hardest part. Create a file named
+ <code>foo.mk</code>. It will contain the <i>Makefile</i> rules that
+ are in charge of downloading, configuring, compiling and installing
+ the software. Below is an example that we will comment
+ afterwards.</p>
+
+<pre>
+ 1 #############################################################
+ 2 #
+ 3 # foo
+ 4 #
+ 5 #############################################################
+ 6 FOO_VERSION:=1.0
+ 7 FOO_SOURCE:=less-$(FOO_VERSION).tar.gz
+ 8 FOO_SITE:=http://www.foosoftware.org/downloads
+ 9 FOO_DIR:=$(BUILD_DIR)/less-$(FOO_VERSION)
+ 10 FOO_BINARY:=foo
+ 11 FOO_TARGET_BINARY:=usr/bin/foo
+ 12
+ 13 $(DL_DIR)/$(FOO_SOURCE):
+ 14 $(WGET) -P $(DL_DIR) $(FOO_SITE)/$(FOO_SOURCE)
+ 15
+ 16 $(FOO_DIR)/.source: $(DL_DIR)/$(FOO_SOURCE)
+ 17 zcat $(DL_DIR)/$(FOO_SOURCE) | tar -C $(BUILD_DIR) $(TAR_OPTIONS) -
+ 18 touch $(FOO_DIR)/.source
+ 19
+ 20 $(FOO_DIR)/.configured: $(FOO_DIR)/.source
+ 21 (cd $(FOO_DIR); \
+ 22 $(TARGET_CONFIGURE_OPTS) \
+ 23 CFLAGS="$(TARGET_CFLAGS)" \
+ 24 ./configure \
+ 25 --target=$(GNU_TARGET_NAME) \
+ 26 --host=$(GNU_TARGET_NAME) \
+ 27 --build=$(GNU_HOST_NAME) \
+ 28 --prefix=/usr \
+ 29 --sysconfdir=/etc \
+ 30 );
+ 31 touch $(FOO_DIR)/.configured;
+ 32
+ 33 $(FOO_DIR)/$(FOO_BINARY): $(FOO_DIR)/.configured
+ 34 $(MAKE) CC=$(TARGET_CC) -C $(FOO_DIR)
+ 35
+ 36 $(TARGET_DIR)/$(FOO_TARGET_BINARY): $(FOO_DIR)/$(FOO_BINARY)
+ 37 $(MAKE) prefix=$(TARGET_DIR)/usr -C $(FOO_DIR) install
+ 38 rm -Rf $(TARGET_DIR)/usr/man
+ 39
+ 40 foo: uclibc ncurses $(TARGET_DIR)/$(FOO_TARGET_BINARY)
+ 41
+ 42 foo-source: $(DL_DIR)/$(FOO_SOURCE)
+ 43
+ 44 foo-clean:
+ 45 $(MAKE) prefix=$(TARGET_DIR)/usr -C $(FOO_DIR) uninstall
+ 46 -$(MAKE) -C $(FOO_DIR) clean
+ 47
+ 48 foo-dirclean:
+ 49 rm -rf $(FOO_DIR)
+ 50
+</pre>
+
+ <p>First of all, this <i>Makefile</i> example works for a single
+ binary software. For other softwares such as libraries or more
+ complex stuff with multiple binaries, it should be adapted. Look at
+ the other <code>*.mk</code> files in the <code>package</code>
+ directory.</p>
+
+ <p>At lines 6-11, a couple of useful variables are defined :</p>
+
+ <ul>
+
+ <li><code>FOO_VERSION</code> : The version of <i>foo</i> that
+ should be downloaded.</li>
+
+ <li><code>FOO_SOURCE</code> : The name of the tarball of
+ <i>foo</i> on the download website of FTP site. As you can see
+ <code>FOO_VERSION</code> is used.</li>
+
+ <li><code>FOO_SITE</code> : The HTTP or FTP site from which
+ <i>foo</i> archive is downloaded. It must include the complete
+ path to the directory where <code>FOO_SOURCE</code> can be
+ found.</li>
+
+ <li><code>FOO_DIR</code> : The directory into which the software
+ will be configured and compiled. Basically, it's a subdirectory
+ of <code>BUILD_DIR</code> which is created upon decompression of
+ the tarball.</li>
+
+ <li><code>FOO_BINARY</code> : Software binary name. As said
+ previously, this is an example for a single binary software.</li>
+
+ <li><code>FOO_TARGET_BINARY</code> : The full path of the binary
+ inside the target filesystem.</li>
+
+ </ul>
+
+ <p>Lines 13-14 defines a target that downloads the tarball from
+ the remote site to the download directory
+ (<code>DL_DIR</code>).</p>
+
+ <p>Lines 16-18 defines a target and associated rules that
+ uncompress the downloaded tarball. As you can see, this target
+ depends on the tarball file, so that the previous target (line
+ 13-14) is called before executing the rules of the current
+ target. Uncompressing is followed by <i>touching</i> a hidden file
+ to mark the software has having been uncompressed. This trick is
+ used everywhere in Buildroot <i>Makefile</i> to split steps
+ (download, uncompress, configure, compile, install) while still
+ having correct dependencies.</p>
+
+ <p>Lines 20-31 defines a target and associated rules that
+ configures the software. It depends on the previous target (the
+ hidden <code>.source</code> file) so that we are sure the software has
+ been uncompressed. In order to configure it, it basically runs the
+ well-known <code>./configure</code>script. As we may be doing
+ cross-compilation, <code>target</code>, <code>host</code> and
+ <code>build</code> arguments are given. The prefix is also set to
+ <code>/usr</code>, not because the software will be installed in
+ <code>/usr</code> on your host system, but in the target
+ filesystem. Finally it creates a <code>.configured</code> file to
+ mark the software as configured.</p>
+
+ <p>Lines 33-34 defines a target and a rule that compiles the
+ software. This target will create the binary file in the
+ compilation directory, and depends on the software being already
+ configured (hence the reference to the <code>.configured</code>
+ file). It basically runs <code>make</code> inside the source
+ directory.</p>
+
+ <p>Lines 36-38 defines a target and associated rules that install
+ the software inside the target filesystem. It depends on the
+ binary file in the source directory, to make sure the software has
+ been compiled. It uses the <code>install</code> target of the
+ software <code>Makefile</code> by passing a <code>prefix</code>
+ argument, so that the <code>Makefile</code> doesn't try to install
+ the software inside host <code>/usr</code> but inside target
+ <code>/usr</code>. After the installation, the
+ <code>/usr/man</code> directory inside the target filesystem is
+ removed to save space.</p>
+
+ <p>Line 40 defines the main target of the software, the one
+ referenced in the <code>Makefile.in</code> file. This targets
+ should first of all depends on the dependecies of the software (in
+ our example, <i>uclibc</i> and <i>ncurses</i>), and then to the
+ final binary. This last dependency will call all previous
+ dependencies in the right order. </p>
+
+ <p>Line 42 defines a simple target that only downloads the code
+ source. This is not used during normal operation of Buildroot, but
+ might be useful.</p>
+
+ <p>Lignes 44-46 define a simple target to clean the software build
+ by calling the <i>Makefiles</i> with the appropriate option.</p>
+
+ <p>Lines 48-49 define a simple target to completely remove the
+ directory in which the software was uncompressed, configured and
+ compiled.</p>
+
+ <h3>Conclusion</h3>
+
+ <p>As you can see, adding a software to buildroot is simply a
+ matter of writing a <i>Makefile</i> using an already existing
+ example and to modify it according to the compilation process of
+ the software.</p>
+
+ <p>If you package software that might be useful for other persons,
+ don't forget to send a patch to Buildroot developers !</p>
+
+ <h2><a name="links" id="links"></a>Ressources</h2>
+
+ <p>To learn more about Buildroot you can visit these
+ websites:</p>
+
+ <ul>
+ <li><a href="http://www.uclibc.org/">http://www.uclibc.org/</a></li>
+ <li><a href="http://www.busybox.net/">http://www.busybox.net/</a></li>
+ </ul>
+
+ </div>
+</body>
+</html>
diff --git a/docs/stylesheet.css b/docs/stylesheet.css
new file mode 100644
index 0000000000..2c36417823
--- /dev/null
+++ b/docs/stylesheet.css
@@ -0,0 +1,65 @@
+body {
+ margin: 0px 0px 0px 0px;
+ color: white;
+ background-color: #93c6f9;
+ font: 12pt/18pt georgia;
+}
+
+div.main {
+ margin: 10px 10px 10px 10px;
+ padding: 10px 10px 10px 10px;
+ color: black;
+ background-color: white;
+}
+
+div.titre {
+ text-align: center;
+ background-color: #336699;
+ color: white;
+ padding: 10px 10px 10px 10px;
+}
+
+h1 {
+ text-align: center;
+ font: 26pt georgia;
+ letter-spacing: 3px;
+}
+
+h2 {
+ padding: 5px 5px 5px 5px;
+ background-color: #c2e0ff;
+ color: #336699;
+}
+
+a:link, a:visited {
+ font-weight: bold;
+ text-decoration: none;
+ color: #336699;
+}
+
+a:hover, a:active {
+ text-decoration: underline;
+ color: #9685BA;
+}
+
+h3 {
+ font: italic normal 14pt georgia;
+ letter-spacing: 1px;
+ margin-bottom: 0px;
+ margin-left: 10px;
+ margin-right: 10px;
+ color: #336699;
+}
+
+p {
+ margin-left: 10px;
+ margin-right: 10px;
+ text-align: justify;
+}
+
+pre {
+ border-left: 3px #aaa solid;
+ margin-left: 1em;
+ padding: 0 1em;
+ color: #888;
+} \ No newline at end of file