source: x/installing/xorg7.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="xorg7" xreflabel="Xorg-&xorg-version;">
  <?dbhtml filename="xorg7.html"?>


  <title>Introduction to Xorg-&xorg-version;</title>

  <indexterm zone="xorg7">
    <primary sortas="a-xorg7">Xorg</primary>
  </indexterm>


  <para>
    <application>Xorg</application> is a freely redistributable,
    open-source implementation of the <application>X</application> Window
    System. This system provides a client/server interface between display
    hardware (the mouse, keyboard, and video displays) and the desktop
    environment, while also providing both the windowing infrastructure and a
    standardized application interface (API).
  </para>

  <bridgehead renderas="sect3">Xorg Download and Installation
  Instructions</bridgehead>

  <para>
    Xorg-7.0 introduced a completely auto-tooled, modular build system.
    With the new modular build system, it is no longer possible to download
    the entire package in a single file. In fact, there will be well over 100
    packages that need to be fetched from the download location. To assist
    with such a large task, installing <xref linkend="wget"/> is strongly
    recommended for downloading the needed files.  A complete
    <application>wget</application> file list is provided for each page
    that includes multiple packages.
  </para>

  <para>
    Given the number of packages available, deciding which packages you
    need to install for your particular setup may seem a bit overwhelming at
    first.  Take a look at <ulink url=
    "https://wiki.x.org/wiki/ModuleDescriptions">this page</ulink>
    and <ulink url=
    "https://lists.x.org/archives/xorg-modular/2005-November/000801.html">
    this thread</ulink>
    to get an idea of what you will need.  If you are unsure, you should
    install all packages at the cost of extra disk space.
  </para>

  <note>
    <para>
      Even if you intend to download only the necessary packages, you
      should download the wget file lists.  The list of files are ordered by
      dependency, and the package versions listed in the files are known to
      work well with each other. Further, the wget file lists contain comments
      for specific packages that are deprecated or are not recommended to
      install. Newer packages are likely intended for the
      next release of <application>Xorg</application> and have already proved
      to be incompatible with current versions of software installed in BLFS.
      The installed size of <application>Xorg</application> can be reduced
      considerably by installing only the packages that you will need and use,
      however, the BLFS book cannot account for all dependencies and build
      options for the individual <application>Xorg</application> packages.
      The instructions assume that all packages have been built.
    </para>
  </note>

  <para>
    Additionally, because of the large number of repetitive commands,
    you are encouraged to partially automate the build. Instructions have been
    given that utilize the <xref linkend="sudo"/> package. It is recommended
    that you use the <parameter>:NOPASSWD</parameter> configuration option
    for the user that will be building the xorg packages.
  </para>

  <sect2 id="xorg-env" xreflabel="Xorg build environment">
    <title>Setting up the Xorg Build Environment</title>

    <note>
      <para>
        The following instructions assume that the shell
        startup files have been set up as described in
        <xref linkend="postlfs-config-profile" />.
      </para>
    </note>

    <para>
      As with previous releases of the X Window System, it may be
      desirable to install <application>Xorg</application> into an alternate
      prefix.  This is no longer common practice among Linux distributions.
      The common installation prefix for <application>Xorg</application> on
      Linux is <filename class="directory">/usr</filename>.  There is no
      standard alternate prefix, nor is there any exception in the current
      revision of the Filesystem Hierarchy Standard for Release 7 of the X
      Window System.  Alan Coopersmith of Sun Microsystems, once
      stated "At Sun, we were using
      <filename class="directory">/usr/X11</filename> and plan to stick with
      it."  Only the <filename class="directory">/opt/*</filename> prefix or
      the <filename class="directory">/usr</filename> prefix adhere to the
      current FHS guidelines.
    </para>

    <para>
      The BLFS editors recommend using the <filename class="directory">/usr</filename>
      prefix.
    </para>

    <para>
      Choose your installation prefix, and set the <envar>XORG_PREFIX</envar>
      variable with the following command:
    </para>

<screen><userinput>export XORG_PREFIX="<replaceable>&lt;PREFIX&gt;</replaceable>"</userinput></screen>

    <para>
      Throughout these instructions, you will use the following
      <command>configure</command> switches for all of the packages. Create the
      <envar>XORG_CONFIG</envar> variable to use for this parameter
      substitution:
    </para>

<screen><userinput>export XORG_CONFIG="--prefix=$XORG_PREFIX --sysconfdir=/etc \
    --localstatedir=/var --disable-static"</userinput></screen>

    <para>
      Create an <filename>/etc/profile.d/xorg.sh</filename> configuration
      file containing these variables as the
      <systemitem class="username">root</systemitem> user:
    </para>

<screen role="root"><userinput>cat &gt; /etc/profile.d/xorg.sh &lt;&lt; EOF
<literal>XORG_PREFIX="$XORG_PREFIX"
XORG_CONFIG="--prefix=\$XORG_PREFIX --sysconfdir=/etc --localstatedir=/var --disable-static"
export XORG_PREFIX XORG_CONFIG</literal>
EOF
chmod 644 /etc/profile.d/xorg.sh</userinput></screen>

    <note>
      <para>
        There is some confusion about the above 'here' document.
        The backslash in front of the dollar sign is correct.  Bash
        will remove it when creating /etc/profile.d/xorg.sh.  However, if
        you are creating the file with an editor, a copy and paste operation
        will not remove the backslash.  It must then be removed manually.
      </para>
    </note>

    <para>
      If you've installed <xref linkend="sudo"/>, ensure that
      <envar>XORG_PREFIX</envar> and <envar>XORG_CONFIG</envar> are available
      in the <application>sudo</application> environment. As the
      <systemitem class="username">root</systemitem> user, run the following
      command:
    </para>

<screen role="root"><userinput>cat &gt; /etc/sudoers.d/xorg &lt;&lt; EOF
<literal>Defaults env_keep += XORG_PREFIX
Defaults env_keep += XORG_CONFIG</literal>
EOF</userinput></screen>

<bridgehead renderas="sect2">If you are not using the standard Xorg prefix...</bridgehead>

    <warning>
      <para>
        If you've decided to use the standard <filename
        class="directory">/usr</filename> prefix, you must omit the remainder of
        this page and continue at <xref linkend='util-macros'/>.
      </para>
    </warning>

    <para>
      If you've decided to <emphasis>not</emphasis> use the standard
      prefix, be sure to add <filename
      class="directory">$XORG_PREFIX/bin</filename> to your <envar>PATH</envar>
      environment variable, and <filename class="directory">
      $XORG_PREFIX/lib/pkgconfig</filename> and <filename class="directory">
      $XORG_PREFIX/share/pkgconfig</filename> to your
      <envar>PKG_CONFIG_PATH</envar> variable. It is also helpful to specify
      additional search paths for <command>gcc</command> and an include
      directory for the <command>aclocal</command> program.  Issue the
      following commands as the <systemitem class="username">root</systemitem>
      user:
    </para>

<screen role="nodump"><userinput>cat &gt;&gt; /etc/profile.d/xorg.sh &lt;&lt; "EOF"
<literal>
pathappend $XORG_PREFIX/bin             PATH
pathappend $XORG_PREFIX/lib/pkgconfig   PKG_CONFIG_PATH
pathappend $XORG_PREFIX/share/pkgconfig PKG_CONFIG_PATH

pathappend $XORG_PREFIX/lib             LIBRARY_PATH
pathappend $XORG_PREFIX/include         C_INCLUDE_PATH
pathappend $XORG_PREFIX/include         CPLUS_INCLUDE_PATH

ACLOCAL="aclocal -I $XORG_PREFIX/share/aclocal"

export PATH PKG_CONFIG_PATH ACLOCAL LIBRARY_PATH C_INCLUDE_PATH CPLUS_INCLUDE_PATH</literal>
EOF</userinput></screen>

    <para>
      The script above needs to be activated.  Normally it will be
      automatic at login, but to activate it now, as a regular user, run:
    </para>

<screen role="nodump"><userinput>source /etc/profile.d/xorg.sh</userinput></screen>

    <para>
      You should also add
      <filename class="directory"> $XORG_PREFIX/lib</filename> to the
      <filename>/etc/ld.so.conf</filename> file. Again, as the
      <systemitem class="username">root</systemitem> user, issue the following
      command:
    </para>

<screen role="nodump"><userinput>echo "$XORG_PREFIX/lib" >> /etc/ld.so.conf</userinput></screen>

    <para>
      You should also modify
      <filename>/etc/man_db.conf</filename>, adding appropriate
      MANDATORY_MANPATH, MANPATH_MAP, and MANDB_MAP entries following the
      examples for <filename class="directory">/usr/X11R6</filename>. Issue the
      following command as the <systemitem class="username">root</systemitem>
      user:
    </para>

<screen role="nodump"><userinput>sed -e "s@<replaceable>X11R6/man</replaceable>@X11R6/share/man@g" \
    -e "s@<replaceable>/usr/X11R6</replaceable>@$XORG_PREFIX@g"   \
    -i /etc/man_db.conf</userinput></screen>

    <para>
      Some applications look for shared files in <filename
      class="directory">/usr/share/X11</filename>.  Create a symbolic link to
      the proper location as the <systemitem class="username">root</systemitem>
      user:
    </para>

<screen role="nodump"><userinput>ln -svf $XORG_PREFIX/share/X11 /usr/share/X11</userinput></screen>

    <para>
      If building KDE, some cmake files look for Xorg in places other than
      $XORG_PREFIX.  Allow cmake to find Xorg with:
    </para>

<screen role="nodump"><userinput>ln -svf $XORG_PREFIX /usr/X11R6</userinput></screen>
<!--
    <para>
      Finally, if building on x86_64, you will need to create the
      <filename class="directory">$XORG_PREFIX/lib</filename> directory and the
      <filename>$XORG_PREFIX/lib64</filename> symlink. Again, as the
      <systemitem class="username">root</systemitem> user, issue the following
      commands:
    </para>

<screen role="root"><userinput>install -v -m755 -d $XORG_PREFIX &amp;&amp;
install -v -m755 -d $XORG_PREFIX/lib &amp;&amp;
ln -sf lib $XORG_PREFIX/lib64</userinput></screen>
-->
  </sect2>

</sect1>