lfs/prologue/standards.xml

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<sect1 id="pre-standards">
  <?dbhtml filename="standards.html"?>

  <title>LFS and Standards</title>

  <!--<sect2>
    <title/> -->

     <para>The structure of LFS follows Linux standards as closely as
     possible.  The primary standards are:</para>

    <itemizedlist>
      <listitem>
        <para><ulink url="https://pubs.opengroup.org/onlinepubs/9699919799/">
        POSIX.1-2008</ulink>.</para>
      </listitem>
      <listitem>
        <para><ulink
        url="https://refspecs.linuxfoundation.org/FHS_3.0/fhs/index.html">
        Filesystem Hierarchy Standard (FHS) Version 3.0</ulink></para>

      </listitem>
      <listitem>
        <para><ulink url="https://refspecs.linuxfoundation.org/lsb.shtml">Linux
        Standard Base (LSB) Version 5.0 (2015)</ulink></para>

        <para>The LSB has four separate specifications: Core, Desktop,
        Languages, and Imaging.  Some parts of Core and Desktop
        specifications are architecture specific.  There are also two trial
        specifications: Gtk3 and Graphics.  LFS attempts to conform to the LSB
        specifications for the IA32 (32-bit x86) or AMD64 (x86_64)
        architectures discussed in the previous section.</para>

        <note><para>Many people do not agree with these requirements.
        The main purpose of the LSB is to ensure that proprietary software
        can be installed and run on a compliant system.
        Since LFS is source based, the user has complete control over what
        packages are desired; you may choose not to install some packages that
        are specified by the LSB.</para></note>

      </listitem>
    </itemizedlist>

    <para>While it is possible to create a complete system that will pass the LSB
    certification tests <quote>from scratch,</quote> this can't be done without many additional packages
    that are beyond the scope of the LFS book.  Installation instructions for some of these
    additional packages can be found in BLFS. </para>

    <variablelist>
      <bridgehead renderas="sect3">Packages supplied by LFS needed to
          satisfy the LSB Requirements</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry>
        <term><emphasis>LSB Core:</emphasis></term>
        <listitem>
          <para>
            Bash, Bc, Binutils, Coreutils, Diffutils, File, Findutils, Gawk,
            GCC, Gettext, Glibc, Grep, Gzip, M4, Man-DB, Procps, Psmisc,
            Sed, Shadow, <phrase revision='sysv'>SysVinit</phrase><phrase
            revision='systemd'>Systemd</phrase>, Tar, Util-linux, Zlib
          </para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><emphasis>LSB Desktop:</emphasis></term>
        <listitem>
          <para>None</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><emphasis>LSB Languages:</emphasis></term>
        <listitem>
          <para>Perl</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><emphasis>LSB Imaging:</emphasis></term>
        <listitem>
          <para>None</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><emphasis>LSB Gtk3 and LSB Graphics (Trial Use):</emphasis></term>
        <listitem>
          <para>None</para>
        </listitem>
      </varlistentry>

    </variablelist>

    <variablelist>
      <bridgehead renderas="sect3">Packages supplied by BLFS needed to
          satisfy the LSB Requirements</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry>
        <term><emphasis>LSB Core:</emphasis></term>
        <listitem>
          <para>At, Batch (a part of At), BLFS Bash Startup Files, Cpio, Ed,
          Fcrontab, LSB-Tools, NSPR, NSS, Linux-PAM, Pax, Sendmail
          (or Postfix or Exim), Time
          </para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><emphasis>LSB Desktop:</emphasis></term>
        <listitem>
          <para>Alsa, ATK, Cairo, Desktop-file-utils, Freetype, Fontconfig,
          Gdk-pixbuf, Glib2, GLU, Icon-naming-utils, Libjpeg-turbo,
          Libxml2, Mesa, Pango, Xdg-utils, Xorg</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><emphasis>LSB Languages:</emphasis></term>
        <listitem>
          <para>Libxml2, Libxslt</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><emphasis>LSB Imaging:</emphasis></term>
        <listitem>
          <para>CUPS, Cups-filters, Ghostscript, SANE</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><emphasis>LSB Gtk3 and LSB Graphics (Trial Use):</emphasis></term>
        <listitem>
          <para>GTK+3</para>
        </listitem>
      </varlistentry>

    </variablelist>

    <variablelist>
      <bridgehead renderas="sect3">Components not supplied or optionally
      supplied by LFS or BLFS needed to satisfy the LSB
      Requirements</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry>
        <term><emphasis>LSB Core:</emphasis></term>
        <listitem>
          <para>
            <command>install_initd</command>,
            <filename class='libraryfile'>libcrypt.so.1</filename>
            (can be provided with optional instructions for the LFS
            Libxcrypt package),
            <filename class='libraryfile'>libncurses.so.5</filename>
            (can be provided with optional instructions for the LFS
            Ncurses package),
            <filename class='libraryfile'>libncursesw.so.5</filename>
            (but <filename class='libraryfile'>libncursesw.so.6</filename>
            is provided by the LFS Ncurses package)
          </para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><emphasis>LSB Desktop:</emphasis></term>
        <listitem>
          <para>
            <filename class='libraryfile'>libgdk-x11-2.0.so</filename>
            (but <filename class='libraryfile'>libgdk-3.so</filename>
            is provided by the BLFS GTK+-3 package),
            <filename class='libraryfile'>libgtk-x11-2.0.so</filename>
            (but <filename class='libraryfile'>libgtk-3.so</filename>
            and <filename class='libraryfile'>libgtk-4.so</filename>
            are provided by the BLFS GTK+-3 and GTK-4 packages),
            <filename class='libraryfile'>libpng12.so</filename>
            (but <filename class='libraryfile'>libpng16.so</filename>
            is provided by the BLFS Libpng package),
            <filename class='libraryfile'>libQt*.so.4</filename>
            (but <filename class='libraryfile'>libQt6*.so.6</filename>
            are provided by the BLFS Qt6 package),
            <filename class='libraryfile'>libtiff.so.4</filename>
            (but <filename class='libraryfile'>libtiff.so.6</filename>
            is provided by the BLFS Libtiff package)
          </para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><emphasis>LSB Languages:</emphasis></term>
        <listitem>
          <para><command>/usr/bin/python</command> (LSB requires Python2 but
          LFS and BLFS only provide Python3)</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><emphasis>LSB Imaging:</emphasis></term>
        <listitem>
          <para>None</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><emphasis>LSB Gtk3 and LSB Graphics (Trial Use):</emphasis></term>
        <listitem>
          <para>
            <filename class='libraryfile'>libpng15.so</filename>
            (but <filename class='libraryfile'>libpng16.so</filename>
            is provided by the BLFS Libpng package)
          </para>
        </listitem>
      </varlistentry>

    </variablelist>

</sect1>