source: BOOK/boot/x86/kernel.xml@ d720fdb

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
  "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;
]>

<sect1 id="ch-boot-kernel" role="wrap">
  <?dbhtml filename="kernel.html"?>

  <title>Linux-&linux-version2;</title>

  <indexterm zone="ch-boot-kernel">
    <primary sortas="a-Linux">Linux</primary>
    <secondary>boot</secondary>
  </indexterm>

  <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
  href="../../bootable/x86/kernel.xml"
  xpointer="xpointer(//*[@role='package'])"/>

  <sect2 role="installation">
    <title>Installation of the kernel</title>

    <warning os="aa">
      <para>Here a temporary cross-compiled kernel will be built. When
      configuring it, select the minimal amount of options required to
      boot the target machine and build the final system. I.e., no support
      for sound, printers, etc. will be needed.</para>

      <para>Also, try to avoid the use of modules if possible, and don't
      use the resulting kernel image for production systems.</para>
    </warning>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
    href="../../bootable/x86/kernel.xml"
    xpointer="xpointer(//*[@os='a'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
    href="../../bootable/x86/kernel.xml"
    xpointer="xpointer(//*[@os='p1'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
    href="../../bootable/x86/kernel.xml"
    xpointer="xpointer(//*[@os='p2'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
    href="../../bootable/x86/kernel.xml"
    xpointer="xpointer(//*[@os='b'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
    href="../../bootable/x86/kernel.xml"
    xpointer="xpointer(//*[@os='c'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
    href="../../bootable/x86/kernel.xml"
    xpointer="xpointer(//*[@os='d'])"/>

    <note os="kc"><para>A good starting place for setting up the kernel
    configuration is to run <command>make defconfig</command>. This will set the    base configuration to a good state that takes your current system
    architecture into account.</para>

    <para>Be sure to configure the following options as
    shown, or the system might not work correctly or boot at all.</para>

    <screen role="nodump">Device Drivers  ---&gt;
  Generic Driver Options  ---&gt;
    ()  path to uevent helper (CONFIG_UEVENT_HELPER_PATH)
    [*] Maintain a devtmpfs filesystem to mount at /dev (CONFIG_DEVTMPFS)
    [ ] Fallback user-helper invocation for firmware loading (CONFIG_FW_LOADER_USER_HELPER)</screen></note>

    <para os="ae">Configure the kernel via a menu-driven interface:</para>

<screen><userinput>make ARCH=i386 CROSS_COMPILE=${CLFS_TARGET}- menuconfig</userinput></screen>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
    href="../../bootable/x86/kernel.xml"
    xpointer="xpointer(//*[@os='m'])"/>

<screen><userinput>make ARCH=i386 CROSS_COMPILE=${CLFS_TARGET}-</userinput></screen>

    <para os="af">If the use of kernel modules can't be avoided, a file in
    <filename class="directory">/etc/modprobe.d</filename> may be needed.
    Information pertaining to modules and kernel configuration is
    located in the kernel documentation in the <filename
    class="directory">Documentation</filename> directory of the kernel
    sources tree. The <filename>modprobe.d</filename> man page may also
    be of interest.</para>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
    href="../../bootable/x86/kernel.xml"
    xpointer="xpointer(//*[@os='s'])"/>

<screen><userinput>make ARCH=i386 CROSS_COMPILE=${CLFS_TARGET}- \
    INSTALL_MOD_PATH=/tools modules_install</userinput></screen>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
    href="../../bootable/x86/kernel.xml"
    xpointer="xpointer(//*[@os='s2'])"/>

<screen><userinput>make ARCH=i386 CROSS_COMPILE=${CLFS_TARGET}- \
    INSTALL_MOD_PATH=/tools firmware_install</userinput></screen>

    <para os="u">After kernel compilation is complete, additional steps are
    required to complete the installation. Some files need to be copied to
    the <filename class="directory">/tools/boot</filename> directory.</para>

    <para os="v">Issue the following commands to install the kernel:</para>

<screen><userinput>mkdir -pv /tools/boot
cp -v arch/i386/boot/bzImage /tools/boot/vmlinuz-clfs-&linux-version2;</userinput></screen>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
    href="../../bootable/x86/kernel.xml"
    xpointer="xpointer(//*[@os='w'])"/>

<screen os="w1"><userinput>cp -v System.map /tools/boot/System.map-&linux-version2;</userinput></screen>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
    href="../../bootable/x86/kernel.xml"
    xpointer="xpointer(//*[@os='x'])"/>

<screen os="x1"><userinput>cp -v .config /tools/boot/config-&linux-version2;</userinput></screen>

  </sect2>

  <sect2 role="content">
    <title/>

    <para>Details on this package are located in <xref
    linkend="contents-kernel" role="."/></para>

  </sect2>

</sect1>