lfs/chapter06/file.xml

<?xml version="1.0" encoding="UTF-8"?>
<!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-tools-file" role="wrap">
  <?dbhtml filename="file.html"?>

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

  <title>File-&file-version;</title>

  <indexterm zone="ch-tools-file">
    <primary sortas="a-File">File</primary>
    <secondary>tools</secondary>
  </indexterm>

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

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
    href="../chapter08/file.xml"
    xpointer="xpointer(/sect1/sect2[1]/para[1])"/>

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

      <seglistitem>
        <seg>&file-tmp-sbu;</seg>
        <seg>&file-tmp-du;</seg>
      </seglistitem>
    </segmentedlist>

  </sect2>

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

    <para>
       The <command>file</command> command on the build host needs
       to be the same version as the one we are building in order to
       create the signature file. Run the following commands to make a
       temporary copy of the <command>file</command> command:
    </para>

<screen><userinput remap="pre">mkdir build
pushd build
  ../configure --disable-bzlib      \
               --disable-libseccomp \
               --disable-xzlib      \
               --disable-zlib
  make
popd</userinput></screen>

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

      <varlistentry>
        <term><parameter>--disable-*</parameter></term>
        <listitem>
          <para>The configuration script attempts to use some packages from
          the host distribution if the corresponding library files exist.
          It may cause compilation failure if a library file exists, but
          the corresponding header files do not.  These options prevent
          using these unneeded capabilities from the host.</para>
        </listitem>
      </varlistentry>
    </variablelist>

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

<screen><userinput remap="configure">./configure --prefix=/usr --host=$LFS_TGT --build=$(./config.guess)</userinput></screen>

    <para>Compile the package:</para>

<screen><userinput remap="make">make FILE_COMPILE=$(pwd)/build/src/file</userinput></screen>

    <para>Install the package:</para>

<screen><userinput remap="install">make DESTDIR=$LFS install</userinput></screen>

    <para>Remove the libtool archive file because it is harmful for cross
    compilation:</para>

<screen><userinput remap="install">rm -v $LFS/usr/lib/libmagic.la</userinput></screen>

  </sect2>

  <sect2 role="content">
    <title/>
    <para>Details on this package are located in <xref linkend="contents-file" role="."/></para>

  </sect2>

</sect1>