source: chapter01/how.xml@ 7d7f246

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<sect1 id="ch-intro-how">
  <?dbhtml filename="how.html"?>

  <title>How to Cross Build an LFS System</title>

  <para>The LFS system will be built by using an already installed
  UNIX-like system (such as Debian Linux or Mac OS X). This
  existing UNIX-like system (the host) will be used as a starting point to
  provide necessary programs, including a compiler, linker, and shell,
  to build the new system. Select the <quote>development</quote> option
  during the distribution installation to be able to access these
  tools.</para>

  <para>As an alternative to installing a separate distribution onto your
  machine, you may wish to use <!-- the Linux From Scratch LiveCD or --> a LiveCD from a
  commercial distribution. <!-- The LFS LiveCD works well as a host system,
  providing all the tools you need to successfully follow the instructions in
  this book. The LiveCD version is behind the current book, but is still useful
  as a host for building the current book.  The <quote>-nosrc</quote> or
  <quote>-min</quote> editions of the LiveCD are the most appropriate for
  building a current LFS system.  For more information about the LFS LiveCD or
  to download a copy, visit <ulink url="&livecd-root;"/>. --></para>

  <!--
  <note>
    <para>The LFS LiveCD might not work on newer hardware configurations,
    failing to boot or failing to detect some devices such as some SATA hard
    drives.</para>
  </note> -->

  <para><xref linkend="chapter-partitioning"/> of this book describes how
  to create a new Linux native partition and file system. This is the place
  where the new LFS system will be compiled and installed. <xref
  linkend="chapter-getting-materials"/> explains which packages and
  patches need to be downloaded to build an LFS system and how to store
  them on the new file system. <xref linkend="chapter-final-preps"/>
  discusses the setup of an appropriate working environment. Please read
  <xref linkend="chapter-final-preps"/> carefully as it explains several
  important issues you need be aware of before beginning to
  work your way through <xref linkend="chapter-cross-tools"/> and beyond.</para>

  <para><xref linkend="chapter-cross-tools"/>,  explains the installation of
  the initial tool chain, (binutils, gcc, and glibc) using cross compilation
  techniques to isolate the new tools from the host system.</para>

  <para><xref linkend="chapter-temporary-tools"/> shows you how to
  cross-compile basic utilities using the just built cross-toolchain.</para>

  <para><xref linkend="chapter-chroot-temporary-tools"/> then boots the
  minimal Linux environment on the target machine and uses the previously
  built tools to build the additional tools needed to build and test the
  final system.  Note that in the book the minimal Linux environment may be
  referred as <quote>chroot environment</quote> only to keep the consistency
  with the original LFS book.</para>

  <para>This effort to isolate the new system from the host distribution may
  seem excessive. A full technical explanation as to why this is done is
  provided in <xref linkend="ch-tools-toolchaintechnotes"/>.</para>

  <para>In <xref linkend="chapter-building-system"/>, The
  full LFS system is built.</para>

  <para>To finish the installation, the basic system configuration is set up in
  <xref linkend="chapter-config"/>, and the kernel and boot loader are set
  up in <xref linkend="chapter-bootable"/>. <xref linkend="chapter-finalizing"/>
  contains information on continuing the LFS experience beyond this book.
  After the steps in this book have been implemented, the computer will be
  ready to reboot into the new LFS system.</para>

  <para>This is the process in a nutshell. Detailed information on each
  step is discussed in the following chapters and package descriptions.
  Items that may seem complicated will be clarified, and everything will
  fall into place as you embark on the LFS adventure.</para>

</sect1>