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  <article>

      <title>DRI Compilation Guide
      <author>
          <htmlurl url="http://www.precisioninsight.com/"
            name="Precision Insight, Inc.">
      <date>$Date: 2000/04/05 18:32:45 $
        
    <toc>

    <sect>Preamble

      <sect1>Copyright
        <p>
          <bf>Copyright &copy; 2000 by Precision Insight, Inc.,
          Cedar Park, Texas.
          All Rights Reserved.</bf>
        <p>
          <bf>Permission is granted to make and distribute verbatim copies 
          of this document provided the copyright notice and this permission
          notice are preserved on all copies.</bf>
          
      <sect1>Trademarks
        <p>
          OpenGL is a registered trademark and SGI is a trademark of
          Silicon Graphics, Inc.
          Unix is a registered trademark of The Open Group.
          The `X' device and X Window System are trademarks of The Open Group.
          XFree86 is a trademark of The XFree86 Project.
          Linux is a registered trademark of Linus Torvalds.
          Intel is a registered trademark of Intel Corporation.
          3Dlabs, GLINT, and Oxygen are either registered trademarks or
          trademarks of 3Dlabs Inc. Ltd.
          3dfx, Voodoo3, Voodoo4, and Voodoo5 are registered trademarks of
          3dfx Interactive, Incorporated.
	  Matrox is a registered trademark of Matrox Electronic Systems Ltd.
          All other trademarks mentioned are the property of their
          respective owners.


    <sect>Introduction
      <p>
        This document describes how to download, compile and install the
        DRI project.
        This information is intended for experienced Linux developers.
        Beginners are probably better off installing precompiled packages.
      <p>
        Edits, corrections and updates to this document may be mailed
        to brian@precisioninsight.com.


    <sect>Prerequisites
      <p>
        You'll need the following:
        <itemize>
          <item>At least 400MB of free disk space.  More is needed if you want
            to build with debugging information or keep several build trees.
          <item>A fast system.  Using a PIII-550 it takes about 1/2 hour to
            build everthing.
          <item>GCC compiler and related tools.
          <item>ssh (secure shell) for registed developer downloading of the
            DRI source tree
        </itemize>

      <p>
        For 3dfx Voodoo3 hardware, you'll also need:
        <itemize>
          <item>Glide3x headers and runtime library if you want to use the
            3dfx driver.
            These can be obtained from
            <htmlurl url="http://linux.3dfx.com/open_source/glide_kit.htm"
            name="linux.3dfx.com">.
          <item>Linux kernel 2.2.x.
            The DRI developers have been using stock RedHat 6.1 systems
            (kernel 2.2.12-20).
            Later kernel versions will be supported in the future.
        </itemize>

      <p>
        For Matrox G400 hardware, you'll also need:
        <itemize>
          <item>Linux kernel 2.3.51.  Other kernel versions may work but
            this one is known to work.
        </itemize>


    <sect>Kernel preparation
      <p>
        You may have to upgrade your Linux kernel in order to use the DRI.
        This is because you need a kernel version which supports AGP.
        Building a new Linux kernel can be difficult for beginners but
        there are resouces on the Internet to help.
        This document assumes experience with configuring, building and
        installing Linux kernels.
      <p>
        Linux kernels can be downloaded from
        <htmlurl url="http://www.kernel.org/pub/linux/kernel/"
        name="www.kernel.org">
      <p>
        Download the needed kernel and put it in /usr/src.
        Create a directory for the source and unpack it.
        For example:
            <verb>
            cd /usr/src
	    rm -f linux
            mkdir linux-2.3.51
            ln -s linux-2.3.51 linux
            bzcat linux-2.3.51.tar.bz2 | tar xf -
            </verb>
      <p>
        Now configure your kernel.
        You might, for example, use <tt>make menuconfig</tt> and do the
        following:

        <itemize>
        <item>Go to <em>Code maturity level options</em>
	<item>Enable <em>Prompt for development and/or incomplete
          code/drivers</em>
	<item>hit ESC
	<item>Go to <em>Character devices</em>
	<item>Disable <em>Direct Rendering Manager (XFree86 DRI support)</em>
          since we'll use the DRI module from the XFree86/DRI tree.
        <item>Go to <em>/dev/agpgart (AGP Support) (EXPERIMENTAL) (NEW)</em>
        <item>Hit SPACE twice
	<item>Enable all chipsets' support for AGP
	</itemize>

      <p>It's recommended that you turn on MTRRs under <em>Processor type
        and Features</em>, but not required.

      <p>
        Configure the rest of the kernel as required for your system
        (i.e. ethernet, scsi, etc)
      <p>
        Exit, saving your kernel configuration.
      <p>
        Edit your /etc/lilo.conf file.
	Make sure you have an image entry as follows (or similar):
            <verb>
            image=/boot/vmlinuz
                  label=linux.2.3.51
                  read-only
                  root=/dev/hda1
            </verb>
      <p>
	The important part is that you have /boot/vmlinuz without a
	trailing version number.
	If this is the first entry in your /etc/lilo.conf AND you
	haven't set a default, then this will be your default kernel.

      <p>
        Now compile the new kernel:

            <verb>
            cd /usr/src/linux-2.3.51
            make dep ; make bzImage
            make modules ; make modules_install
            make install
            </verb>
	Note that the final part, make install, will automatically run
	lilo for you.
      <p>
        Now reboot to use this new kernel.


    <sect>Downloading the XFree86/DRI CVS Sources
      <p>
        The DRI project is hosted by VA Linux Systems'
        <htmlurl url="http://sourceforge.net/project/?group_id=387"
        name="SourceForge">.
        The DRI source code, which is a subset of the XFree86 source tree,
        is kept in a CVS repository there.
      <p>
        The DRI CVS sources may be accessed either anonymously or as a
        registered SourceForge user.
        It's recommended that you become a registered SourceForge user so
        that you may submit non-annonymous bug reports and can participate
        in the mailing lists.

      <sect1>Anonymous CVS download:
      <p>
        <enum>
          <item>Create a directory to store the CVS files:
            <p>
            <verb>
            cd ~
            mkdir DRI-CVS
            </verb>
            You could put your CVS directory in a different place but we'll
            use <tt>~/DRI-CVS/</tt> here.
            <p>
          <item>Check out the CVS sources:
            <p>
            <verb>
            cd ~/DRI-CVS
            cvs -d:pserver:anonymous@cvs.dri.sourceforge.net:/cvsroot/dri login
              (hit ENTER when prompted for a password)
            cvs -z3 -d:pserver:anonymous@cvs.dri.sourceforge.net:/cvsroot/dri co xc
            </verb>
            <p>
            The -z3 flag causes compression to be used in order to reduce
            the download time.
        </enum>


      <sect1>Registered CVS download:
      <p>
        <enum>
          <item>Create a directory to store the CVS files:
            <p>
            <verb>
            cd ~
            mkdir DRI-CVS
            </verb>
            You could put your CVS directory in a different place but we'll
            use <tt>~/DRI-CVS/</tt> here.
            <p>
          <item>Set the CVS_RSH environment variable:
            <p>
            <verb>
            setenv CVS_RSH ssh      // if using csh or tcsh
            export CVS_RSH=ssh      // if using sh or bash
            </verb>
          <item>Check out the CVS sources:
            <p>
            <verb>
            cd ~/DRI-CVS
            cvs -z3 -dYOURID@cvs.dri.sourceforge.net:/cvsroot/dri co xc
            </verb>
            Replace <tt>YOURID</tt> with your CVS login name.
            You'll be prompted to enter your sourceforge password.
            <p>
            The -z3 flag causes compression to be used in order to reduce
            the download time.
        </enum>


    <sect>Updating your CVS sources
      <p>
        In the future you'll want to occasionally update your local copy of
        the DRI source code to get the latest changes.
        This can be done with:
        <verb>
            cd ~/DRI-CVS
            cvs -z3 update -dA xc
        </verb>
        The -d flag causes any new subdirectories to be created and -A causes
        most recent trunc sources to be fetched, not branch sources.


    <sect>Compiling the XFree86/DRI tree
      <sect1>Make a build tree
        <p>
          Rather than placing object files and library files right in the
          source tree, they're instead put into a parallel <em>build</em> tree.
          The build tree is made with the <tt>lndir</tt> command:
          <verb>
            cd ~/DRI-CVS
            ln -s xc XFree40
            mkdir build
            cd build
            lndir -silent -ignorelinks ../XFree40
          </verb>
        <p>
          The build tree will be populated with symbolic links which point
          back into the CVS source tree.
        <p>
          Advanced users may have several build trees for compiling and
          testing with different options.

      <sect1>Edit the host.def file
        <p>
          The <tt>~/DRI-CVS/build/xc/config/cf/host.def</tt> file is used
          to configure the XFree86 build process.
          You can change it to customize your build options or make adjustments
          for your particular system configuration
        <p>
          The default <tt>host.def</tt> file will look something like this:
          <verb>
            #define DefaultCCOptions -Wall
            #define DefaultGcc2i386Opt -O2
            #define LibraryCDebugFlags -O2
            #define BuildServersOnly YES
            #define XF86CardDrivers vga tdfx mga
            #define LinuxDistribution LinuxRedHat
            #define DefaultCCOptions -ansi GccWarningOptions -pipe
            #define BuildXF86DRI YES
            #define HasGlide3 YES
            /* Optionally turn these on for debugging */
            /* #define GlxBuiltInTdfx YES */
            /* #define GlxBuiltInMga YES */
            /* #define DoLoadableServer NO */
            #define SharedLibFont NO
          </verb>
          The <tt>ProjectRoot</tt> variable specifies where the XFree86 files
          will be installed.
          You probably don't want to use <tt>/usr/X11R6/</tt> because that
          would overwrite your default X files.
          The following is recommended:
          <verb>
            #define ProjectRoot /usr/XF86-main
          </verb>
        <p>
          Especially note the <em>XF86CardDrivers</em> line to be sure your
          driver is listed.
        <p>
          If you have 3dfx hardware be sure that the Glide 3x headers are
          installed in <tt>/usr/include/glide3/</tt> and that the Glide 3x
          library is installed at <tt>/usr/lib/libglide3x.so</tt>.
        <p>
          If you do not have 3dfx hardware comment out the <tt>HasGlide3</tt>
          line in <tt>host.def</tt>.
        <p>

      <sect1>Compile
        <p>
          To compile the complete DRI tree:
          <verb>
            cd ~/DRI-CVS/build/xc/
            make World >& World.LOG
          </verb>
          Or if you want to watch the compilation progress:
          <verb>
            cd ~/DRI-CVS/build/xc/
            make World >& World.LOG &
            tail -f World.LOG
          </verb>
          With the default compilation flags it's normal to get a lot of
          warnings during compilation.
        <p>
          Building will take some time so you may want to go check your
          email or visit slashdot.

      <sect1>Check for compilation errors
        <p>
          Using your text editor, examine <tt>World.LOG</tt> for errors
          by searching for the pattern <tt>***</tt>.
        <p>
          Verify that the DRI kernel module(s) for your system were built:
          <verb>
          cd ~/DRI-CVS/build/xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel
          ls
          </verb>
        <p>
          For the 3dfx Voodoo, you should see <em>tdfx.o</em>.
          For the Matrox G400, you should see <em>mga.o</em>.
        <p>
          If the DRI kernel module(s) failed to build you should verify
          that you're using the right version of the Linux kernel.
          The most recent kernels are not always supported.
        <p>
          After fixing the errors, do <tt>make World</tt> again.
          Later, you might just compile parts of the source tree but it's
          important that the whole tree will build first.


    <sect>Installing
      <p>
        After the DRI tree has been compiled you can install the XFree86
        headers, libraries, programs, etc for testing.

      <sect1>X Installation
	<p>
	  As mentioned above, the install directory is specified by the
	  <tt>ProjectRoot</tt> variable in the <tt>host.def</tt> file.
	  Create that directory now if it doesn't already exist:
	  <verb>
	      mkdir /usr/XF86-main
	  </verb>
	<p>
	  You'll have to change to root since the install process puts
	  several files in <tt>/etc/X11/</tt> and sets the setuid flag on
	  the X server executable.
	  <verb>
	      cd ~/DRI-CVS/build/xc
	      su
	      make install
	  </verb>
	  Edit your <tt>/etc/ld.so.conf</tt> file and put
	  <tt>/usr/XF86-main/lib</tt> as the first line.
	  Continue with:
	  <verb>
	      ldconfig
	      exit
	  </verb>
	<p>
	  Look in <tt>/usr/XF86-main</tt> to be sure the files installed
          there.
	<P>
	  Strictly speaking, installing the DRI tree isn't required.
	  It's possible to run and test the X server directly from the
	  build directory but it's a bit error prone.

      <sect1>Update Locale Information
        <p>
          To update your X locale information do the following:
          <verb>
             cd ~/DRI-CVS/build/xc/nls
             xmkmf
             make
             make install
          </verb>
          This will prevent a locale error message from being printed
          when you run Xlib programs.

    <sect>X Server Configuration
      <p>
        If your X server is currently running you'll have to stop it
        and return to a virtual terminal.
      <p>
        First, setup your XF86Config file.
        It should load the GLX and DRI modules and specify the driver to
        use for your hardware.
        See the <htmlurl url="http://dri.sourceforge.net/DRIuserguide.html"
        name="DRI User Guide"> for detailed information.
      <p>
        You may want to make a backup copy of your existing
        <tt>/etc/X11/XF86Config</tt> file first.
      <p>
        It's very important that you set the <tt>ModulePath</tt> option to
        point to your installation directory:
        <verb>
            ModulePath "/usr/XF86-main/lib/modules"
        </verb>
      <p>
        Double check with this:
        <verb>
            grep ModulePath /etc/X11/XF86Config
        </verb>
      <p>
        Next, your <tt>~/.xinitrc</tt> file controls which clients will be
        launched when your X server starts.
        You might put the following in yours:
        <verb>
            xset b off
            xsetroot -solid "#004070"
            xmodmap -e "clear mod4"
            xrdb -merge ~/.Xdefaults
            xterm -geometry +0+0 &
            xterm -geometry +512+0 &
            fvwm
        </verb>
      <p>

    <sect>X Server Start-up
      <p>
        Before starting the X server you'll need to install the DRI kernel
        module(s).
        For example, to install the <tt>tdfx.so</tt> module for 3dfx hardware:
        <verb>
            cd ~/DRI-CVS/build/xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel
            su
            insmod tdfx.o
            exit
        </verb>
      <p>
        For the Matrox G400:
        <verb>
            insmod mga.o
        </verb>
      <p>
        You can verify that the module is loaded with <tt>lsmod</tt>.
      <p>
        Now start the X server:
      <p>
        <verb>
            xinit -- /usr/XF86-main/bin/XFree86
        </verb>
      <p>
        At this point your X server should be up and running with
        hardware-accelerated direct rendering.
        Please read the
        <htmlurl url="http://dri.sourceforge.net/DRIuserguide.html"
        name="DRI User Guide"> for trouble shooting information.


  </article>


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