lfs-book/chapter05/binutils-pass2.xml

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<sect1 id="ch-tools-binutils-pass2" role="wrap">
  <?dbhtml filename="binutils-pass2.html"?>

  <sect1info condition="script">
    <productname>binutils-pass2</productname>
    <productnumber>&binutils-version;</productnumber>
    <address>&binutils-url;</address>
  </sect1info>

  <title>Binutils-&binutils-version; - Pass 2</title>

  <indexterm zone="ch-tools-binutils-pass2">
    <primary sortas="a-Binutils">Binutils</primary>
    <secondary>tools, pass 2</secondary>
  </indexterm>

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

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
    href="../chapter06/binutils.xml"
    xpointer="xpointer(/sect1/sect2[1]/para[1])"/>

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

      <seglistitem>
        <seg>&binutils-ch5p2-sbu;</seg>
        <seg>&binutils-ch5p2-du;</seg>
      </seglistitem>
    </segmentedlist>

  </sect2>

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

    <para>Create a separate build directory again:</para>

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

    <para>Prepare Binutils for compilation:</para>

<screen><userinput remap="configure">CC=$LFS_TGT-gcc                \
AR=$LFS_TGT-ar                 \
RANLIB=$LFS_TGT-ranlib         \
../configure                   \
    --prefix=/tools            \
    --disable-nls              \
    --disable-werror           \
    --with-lib-path=/tools/lib \
    --with-sysroot</userinput></screen>

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

      <varlistentry>
        <term><parameter>CC=$LFS_TGT-gcc AR=$LFS_TGT-ar RANLIB=$LFS_TGT-ranlib</parameter></term>
        <listitem>
          <para>Because this is really a native build of Binutils, setting these
          variables ensures that the build system uses the cross-compiler and
          associated tools instead of the ones on the host system.</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><parameter>--with-lib-path=/tools/lib</parameter></term>
        <listitem>
          <para>This tells the configure script to specify the library
          search path during the compilation of Binutils, resulting in
          <filename class="directory">/tools/lib</filename> being passed
          to the linker. This prevents the linker from searching through
          library directories on the host.</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><parameter>--with-sysroot</parameter></term>
        <listitem>
          <para>This defines a default (non-existent) sysroot directory
          <filename class="directory">/tools/$LFS_TGT/sys-root</filename>.
          It is useful when looking for shared objects which are required by
          other shared objects explicitly included on the linker's command
          line. Those objects are searched into the directories listed in
          <filename>&lt;sysroot&gt;/etc/ld.so.conf</filename>, and failing
          that, into the linker search path, which is right. If this switch
          is not given, <filename>/etc/ld.so.conf</filename> on the host
          is used, that is, programs may be linked to libraries on
          the host, which we want to avoid.</para>
        </listitem>
      </varlistentry>

    </variablelist>

    <para>Compile the package:</para>

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

    <para>Install the package:</para>

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

    <para>Now prepare the linker for the <quote>Re-adjusting</quote> phase in
    the next chapter:</para>

<screen><userinput remap="adjust">make -C ld clean
make -C ld LIB_PATH=/usr/lib:/lib
cp -v ld/ld-new /tools/bin</userinput></screen>

    <variablelist>
      <title>The meaning of the make parameters:</title>

      <varlistentry>
        <term><parameter>-C ld clean</parameter></term>
        <listitem>
          <para>This tells the make program to remove all compiled
          files in the <filename class="directory">ld</filename>
          subdirectory.</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><parameter>-C ld LIB_PATH=/usr/lib:/lib</parameter></term>
        <listitem>
          <para>This option rebuilds everything in the <filename
          class="directory">ld</filename> subdirectory. Specifying the
          <envar>LIB_PATH</envar> Makefile variable on the command line
          allows us to override the default value of the temporary tools
          and point it to the proper final path. The value of this variable
          specifies the linker's default library search path. This
          preparation is used in the next chapter.</para>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

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

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

  </sect2>

</sect1>