source: x/installing/xwayland.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;

  <!ENTITY xwayland-download-http "&xorg-download-http;/xserver/xwayland-&xwayland-version;.tar.xz">
  <!ENTITY xwayland-download-ftp  " ">
  <!ENTITY xwayland-md5sum        "8f2bb6789e22b5ea1f1f19694267e539">
  <!ENTITY xwayland-size          "1.2 MB">
  <!ENTITY xwayland-buildsize     "27 MB (add 362 MB for tests)">
  <!ENTITY xwayland-time          "0.2 SBU (with parallelism=4; add 1.7 SBU for tests, not including clone time)">
]>

<sect1 id="xwayland" xreflabel="Xwayland-&xwayland-version;">
  <?dbhtml filename="xwayland.html"?>


  <title>Xwayland-&xwayland-version;</title>

  <indexterm zone="xwayland">
    <primary sortas="a-xwayland">xwayland</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to Xwayland</title>

    <para>
      The <application>Xwayland</application> package is an Xorg server
      running on top of the wayland server. It has been separated from the
      main Xorg server package. It allows running X clients inside a
      wayland session.
    </para>

    &lfs121_checked;

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Download (HTTP): <ulink url="&xwayland-download-http;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download (FTP): <ulink url="&xwayland-download-ftp;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download MD5 sum: &xwayland-md5sum;
        </para>
      </listitem>
      <listitem>
        <para>
          Download size: &xwayland-size;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated disk space required: &xwayland-buildsize;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated build time: &xwayland-time;
        </para>
      </listitem>
    </itemizedlist>

    <bridgehead renderas="sect3">Xwayland Dependencies</bridgehead>

    <bridgehead renderas="sect4">Required</bridgehead>
    <para role="required">
      <xref linkend="libxcvt"/>,
      <xref linkend="pixman"/>,
      <xref linkend="wayland-protocols"/>,
      <xref role='runtime' linkend="xorg7-app"/> (runtime), and
      <xref linkend="xorg7-font"/> (only font-util)
    </para>

    <bridgehead renderas="sect4">Recommended</bridgehead>
    <para role="recommended">
      <xref linkend="libepoxy"/>,
      <xref linkend="libtirpc"/>, and
      <xref linkend="mesa"/>
    </para>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <xref linkend="git"/> (to download packages needed for the tests),
      <xref linkend="libei"/>,
      <xref linkend="libgcrypt"/>,
      <xref linkend="nettle"/>,
      <xref linkend="xmlto"/>,
      <xref linkend="xorg7-legacy"/>
         (only bdftopcf, for building fonts required for the tests),
      <ulink url="https://gitlab.freedesktop.org/xorg/test/rendercheck">rendercheck</ulink> (for tests), and
      <ulink url="https://wayland.pages.freedesktop.org/weston/">weston</ulink> (for tests)
    </para>

  </sect2>

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

    <para>
      Install <application>xwayland</application> by running the following
      commands:
    </para>

<screen><userinput>sed -i '/install_man/,$d' meson.build &amp;&amp;

mkdir build &amp;&amp;
cd    build &amp;&amp;

meson setup --prefix=$XORG_PREFIX         \
            --buildtype=release           \
            -Dxkb_output_dir=/var/lib/xkb \
            ..                            &amp;&amp;
ninja</userinput></screen>

    <para>
      Building the test framework needs some work. First,
      <ulink url="https://wayland.pages.freedesktop.org/weston/">weston</ulink>
      brings in several dependencies, but the number can be reduced by
      disabling unneeded features. The <command>meson</command> command
      for a stripped down build of <application>weston</application> is shown
      in <ulink
      url="https://gitlab.freedesktop.org/xorg/xserver/-/blob/xwayland-22.1/.gitlab-ci/debian-install.sh">
      Upstream continuous integration build</ulink>.
<!-- keep 22.1 above: they used to build it in gitlab-ci because debian
     had an obsolete version of weston, but now they take weston from
     debian so the command to build it has been removed. -->
    </para>
<!--
    <para>
      Furthermore, an X server needs to be running during the build of
      <application>xts</application>. If not running the tests in a
      graphical environment, you'll need to enable <command>Xvfb</command>
      by removing the <parameter>-Dxvfb=false</parameter> above. The
      instructions below expect this has been done.
    </para>
-->
    <para>
      Running the tests involves downloading two other frameworks, in addition
      to the mentioned optional dependencies:
    </para>

<screen remap="test"><userinput>mkdir tools &amp;&amp;
pushd tools &amp;&amp;

git clone https://gitlab.freedesktop.org/mesa/piglit.git --depth 1 &amp;&amp;
cat &gt; piglit/piglit.conf &lt;&lt; EOF                                    &amp;&amp;
<literal>[xts]
path=$(pwd)/xts
EOF</literal>

git clone https://gitlab.freedesktop.org/xorg/test/xts --depth 1   &amp;&amp;

export DISPLAY=:22           &amp;&amp;
../hw/vfb/Xvfb $DISPLAY &amp;
VFB_PID=$!                   &amp;&amp;
cd xts                       &amp;&amp;
CFLAGS=-fcommon ./autogen.sh &amp;&amp;
make                         &amp;&amp;
kill $VFB_PID                &amp;&amp;
unset DISPLAY VFB_PID        &amp;&amp;
popd</userinput></screen>

    <para>
      Then the tests can be run with:
    </para>

<screen remap="test"><userinput>XTEST_DIR=$(pwd)/tools/xts PIGLIT_DIR=$(pwd)/tools/piglit ninja test</userinput></screen>

    <!-- The xfontset tests fail on my system -renodr -->
    <para>
      Now, as the <systemitem class="username">root</systemitem> user:
    </para>

<screen role="root" revision="sysv"><userinput>ninja install &amp;&amp;
cat &gt;&gt; /etc/sysconfig/createfiles &lt;&lt; "EOF"
<literal>/tmp/.X11-unix dir 1777 root root</literal>
EOF</userinput></screen>

<screen role="root" revision="systemd"><userinput>ninja install</userinput></screen>

    <para>
      If <xref linkend='xorg-server'/> is not installed and you do not plan
      to install it later, you can install <command>Xvfb</command> from this
      package.  As the &root; user:
    </para>

<screen role="nodump"><userinput>install -vm755 hw/vfb/Xvfb /usr/bin</userinput></screen>

  </sect2>

  <sect2 role="commands">
    <title>Command Explanations</title>

    <para>
      <command>sed -i '/install_man/,$d' meson.build</command>: Prevents
      installing a manual page for <command>Xserver</command>,
      which is also provided by <xref linkend='xorg-server'/>.  Remove this
      command if <xref linkend='xorg-server'/> is not installed and you
      don't plan to install it later.
    </para>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
      href="../../xincludes/meson-buildtype-release.xml"/>
<!--
    <para>
      <parameter>-Dxvfb=false</parameter>: Prevents building the
      <command>xvfb</command> program, which is also installed by
      <xref linkend="xorg-server"/>. Remove this option if you do not plan to
      install the X server.
    </para>

    <para>
      <command>mkdir -pv /etc/X11/xorg.conf.d</command>: This directory is
      needed to put configuration files for Xwayland. This command ensures
      that it exists, as some applications might use it without first
      creating it.
    </para>
-->
    <para revision="sysv">
      <command>cat &gt;&gt; /etc/sysconfig/createfiles...</command>: This
      command creates the <filename class="directory">/tmp/.X11-unix</filename>
      directory at startup, and ensures that the permissions and ownership
      are correct as required by applications using Xwayland.
    </para>

  </sect2>

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

    <segmentedlist>
      <segtitle>Installed Program</segtitle>
      <segtitle>Installed Library</segtitle>
      <segtitle>Installed Directory</segtitle>

      <seglistitem>
        <seg>
          Xwayland
        </seg>
        <seg>
          None
        </seg>
        <seg>
          None
        </seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="Xwayland">
        <term><command>Xwayland</command></term>
        <listitem>
          <para>
            Allows X clients to run under wayland
          </para>
          <indexterm zone="xwayland Xwayland">
            <primary sortas="b-Xwayland">Xwayland</primary>
          </indexterm>
        </listitem>
      </varlistentry>
    </variablelist>
  </sect2>
</sect1>