lfs-book/chapter05/binutils-pass1.xml

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<sect1 id="ch-tools-binutils-pass1" role="wrap">
  <?dbhtml filename="binutils-pass1.html"?>

  <sect1info condition="script">
    <productname>binutils</productname>
    <productnumber>&binutils-version;</productnumber>
    <address>&binutils-url;</address>
  </sect1info>

  <title>Binutils-&binutils-version; - Pass 1</title>

  <indexterm zone="ch-tools-binutils-pass1">
    <primary sortas="a-Binutils">Binutils</primary>
    <secondary>tools, pass 1</secondary>
  </indexterm>

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

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../chapter06/binutils.xml"
    xpointer="xpointer(/sect1/sect2[1]/para[1])"/>

    <segmentedlist>
      <segtitle>&buildtime;</segtitle>
      <segtitle>&diskspace;</segtitle>

      <seglistitem>
        <seg>&binutils-ch5p1-sbu;</seg>
        <seg>&binutils-ch5p1-du;</seg>
      </seglistitem>
    </segmentedlist>

  </sect2>

  <sect2 role="installation">
    <title>Installation of Cross Binutils</title>

    <para>It is important that Binutils be the first package compiled
    because both Glibc and GCC perform various tests on the available
    linker and assembler to determine which of their own features to
    enable.</para>

    <para>The Binutils documentation recommends building Binutils outside of the
    source directory in a dedicated build directory:</para>

<screen><userinput remap="pre">mkdir -v ../binutils-build
cd ../binutils-build</userinput></screen>

    <note>
      <para>In order for the SBU values listed in the rest of the book
      to be of any use, measure the time it takes to build this package from
      the configuration, up to and including the first install. To achieve
      this easily, wrap the three commands in a <command>time</command>
      command like this: <userinput>time { ./configure ... &amp;&amp; make
      &amp;&amp; make install; }</userinput>.</para>
    </note>

    <para>Now prepare Binutils for compilation:</para>

<screen><userinput remap="configure">../binutils-&binutils-version;/configure \
    --target=$LFS_TGT --prefix=/tools \
    --disable-nls --disable-werror</userinput></screen>

    <variablelist>
      <title>The meaning of the configure options:</title>

      <varlistentry>
        <term><envar>--target=$LFS_TGT</envar></term>
        <listitem>
          <para>Because the machine description in the <envar>LFS_TGT</envar>
          variable is slightly different than the value returned by the
          <command>config.guess</command> script, this switch will tell the
          <command>configure</command> script to adjust Binutil's build system
          for building a cross linker.  </para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><parameter>--prefix=/tools</parameter></term>
        <listitem>
          <para>This tells the configure script to prepare to install the
          Binutils programs in the <filename class="directory">/tools</filename>
          directory.</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><parameter>--disable-nls</parameter></term>
        <listitem>
          <para>This disables internationalization as i18n is not needed for the
          temporary tools.</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><parameter>--disable-werror</parameter></term>
        <listitem>
          <para>This prevents the build from stopping in the event that there
          are warnings from the host's compiler.</para>
        </listitem>
      </varlistentry>

    </variablelist>

    <para>Continue with compiling the package:</para>

<screen><userinput remap="make">make</userinput></screen>

    <para>Compilation is now complete. Ordinarily we would now run the
    test suite, but at this early stage the test suite framework (Tcl,
    Expect, and DejaGNU) is not yet in place. The benefits of running the
    tests at this point are minimal since the programs from this
    first pass will soon be replaced by those from the second.</para>

    <para>If building on x86_64, create a symlink to ensure the sanity of
    the toolchain:</para>

<screen><userinput remap="install">case $(uname -m) in
  x86_64) mkdir -v /tools/lib &amp;&amp; ln -sv lib /tools/lib64 ;;
esac</userinput></screen>

    <para>Install the package:</para>

<screen><userinput remap="install">make install</userinput></screen>

  </sect2>

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

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

  </sect2>

</sect1>