source: BOOK/final-system/ppc64/yaboot.xml@ d849dd4

<?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-system-yaboot" role="wrap">
  <?dbhtml filename="yaboot.html"?>

  <title>Yaboot-&yaboot-version;</title>

  <indexterm zone="ch-system-yaboot">
    <primary sortas="a-Yaboot">Yaboot</primary>
  </indexterm>

  <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
  href="../ppc/yaboot.xml"
  xpointer="xpointer(//*[@role='package'])"/>

  <sect2 role="installation">
    <title>Installation of Yaboot</title>

    <para>Existing multilib distributions alter gcc to default to 32-bit
    output.  Because our gcc defaults to 64-bit, we need to pass appropriate
    options to both the compiler and the linker.  The Makefile already
    overrides any CC and ignores LDFLAGS in favour of its own variables, so we
    need to use the following seds for a successful compile and install.</para>

<screen><userinput>sed -i -e "s/\(-print-libgcc-file-name\)/${BUILD32} \1/" \
    -e "s/\(-Bstatic\)/-melf32ppclinux \1/" Makefile
</userinput></screen>

    <variablelist os="j">
      <title>The meaning of the sed parameters:</title>

      <varlistentry>
        <term><parameter>"s/\(-print-libgcc-file-name\)/${BUILD32} \1/"</parameter></term>
        <listitem>
          <para>This picks a convenient place within the Makefile's lgcc
          variable and inserts the flag to force <command>gcc</command> to
          create 32-bit code when compiling yaboot.</para>
        </listitem>
      </varlistentry>
      <varlistentry>
        <term><parameter>"s/\(-Bstatic\)/-melf32ppclinux \1/"</parameter></term>
        <listitem>
          <para>This picks the end of the LFLAGS which the Makefile passes to
          the linker to create the second-stage linux loader, and inserts a
          flag to force <command>ld</command> to use a suitable 32-bit
          emulation picked from the output of <command>'ld -V'</command>.</para>
        </listitem>
      </varlistentry>

    </variablelist>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../ppc/yaboot.xml"
    xpointer="xpointer(//*[@os='a'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../ppc/yaboot.xml"
    xpointer="xpointer(//*[@os='b'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../ppc/yaboot.xml"
    xpointer="xpointer(//*[@os='c'])"/>

<screen os="d"><userinput>CFLAGS="${BUILD32}" make PREFIX=/usr</userinput></screen>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../ppc/yaboot.xml"
    xpointer="xpointer(//*[@os='e'])"/>

    <important os="j0">
      <para>The multilib install of yaboot can fail if you miss any of the
      patches or seds, or omit the CFLAGS variable. <command>ld</command> will
      issue warnings, but the install will appear to complete successfully.
      That would result in an unbootable system, so you need to log the output
      to check it.</para>
    </important>

<screen os='f'><userinput>make PREFIX=/usr install 2&gt;&amp;1 | tee instlog</userinput></screen>

    <para os='g'>To ensure that the install was successful, run the following
    command:</para>

<screen os='h'><userinput>grep 'powerpc:common64' instlog</userinput></screen>

    <para os='i'>If the command gave you <emphasis>any</emphasis> output
    (... is incompatible with powerpc:common output) the build of yaboot is
    broken and you will have to correct your error(s) and repeat it.</para>

  </sect2>

  <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
  href="../ppc/yaboot.xml"
  xpointer="xpointer(id('contents-yaboot'))"/>

</sect1>