Usenet 1994 January/usenetsourcesnewsgroupsinfomagicjanuary1994.iso/answers/x-faq/Intel-Unix-X-faq

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From: [e-mail] (Steve Kotsopoulos)
Subject: X on Intel-based Unix Frequently Asked Questions [FAQ]
Message-ID: <[e-mail]>
Followup-To: poster
Summary: X options for Intel-based Unix (SYSV/386, 386BSD, Linux, Mach)
Originator: [e-mail]
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Reply-To: [e-mail]
Organization: University of Toronto, Engineering Computing Facility
Date: Wed, 1 Dec 1993 14:37:02 GMT
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Archive-name: x-faq/Intel-Unix-X-faq
Last-modified: 1 Dec 1993

This article includes answers to:

I) What options do I have for X software on my Intel-based Unix system?
    1. Free options
    2. Commercial options
II) What is XFree86 and where do I get it?
    3. What is XFree86?
    4. What OSs are supported?
    5. What video hardware is supported?
    6. Who else supports accelerated boards?
    7. Why doesn't XFree86 support 16-color VGA modes?
    8. What other hardware or software requirements are there?
    9. Where can I get source for XFree86?
    10. Where can I get binaries for XFree86?
IV) What general things should I know about running XFree86?
    11. Installation directories
    12. Configuration files
    13. Determining VGA dot clocks and monitor modes
    14. Rebuilding/reconfiguring the server from the link kit
V) What OS-specific things should I know about running XFree86?
    15. SVR4
    16. SVR3
    17. 386BSD
    18. Linux
    19. Mach
VI) What things should I know for building XFree86 from source?
VII) Is there anything special about building clients with XFree86?
    20. BSD compatibility library
    21. ANSICCOPTIONS
VIII) Where to get more information

This article does NOT include answers to general X questions, since they
are already covered by the X FAQ that is regularly posted by David B. Lewis
<[e-mail]>.

For information on X packages for DOS systems, consult the (PC)NFS FAQ
available from seagull.rtd.com:/pub/tcpip/pcnfs.FAQ.v1.2.Z

If you have anything to add or change on this FAQ just let me know.
(especially if you had a problem that someone else was able to help you with)
Send changes to [e-mail], please put 'FAQ' somewhere
in the subject line so that my mail filter will put it in the correct folder.

Please DO NOT ask me questions that are not answered in this FAQ.  I do not
have time to respond to these individually.  Instead, post your question
to the net, and send me the question and answer together when you get it.

Frequently Asked Questions About X on Intel-based Unix (with answers)
=====================================================================

I) What options do I have for X software on my Intel-based Unix system?

1. Free options

    The BEST option is XFree86, which is an enhanced version of X386 1.2.
    Any other version of X386 will be more difficult to compile.
    Information on how to obtain it is listed below.

    X386 is the port of the X11 server to System V/386 that was done by
    Thomas Roell ([e-mail]).  It supports a wide variety of SVGA boards.
    There are 2 major free versions: X386 1.1 is based on X11R4,
    X386 1.2 is included in MIT's X11R5 distribution (ie. you
    don't need to patch it into the MIT source any more).
    X386 1.3 is the current commercial offering from SGCS (see below).

    Several other options are available for people running NeXTSTEP on
    i486 and Pentium hardware. Information on mouseX, Cub'X and Co-Xist
    is available via anonymous ftp from cs.orst.edu in /pub/next/XNeXT.

2. Commercial options

     1) Metro Link
    2213 W. McNab Road
    Pompano Beach, FL  33069
    [phone]
    Fax: [phone]
    email: [e-mail]

    Summary: OS:    QNX, SVR3, SVR4.[012], SCO, UnixWare, LynxOS,
            DESQview/X, Venix, ISC, Solaris, Pyramid, SunOS
         HW:    EGA, VGA, SVGA, TIGA, TARGA, 8514/A, Mach,
            S3, WD, Fujistu, Matrox, Microfield Graphics, R33020
         Other: Motif, OpenLook/XView, XIE Imaging Extension,
            Xv Video Extension, Audio Drivers, Multi Media

     2) SGCS (Snitily Graphics Consulting Services)
    894 Brookgrove Lane
    Cupertino, CA  95014
    [phone], [phone]
    Fax: [phone]
    email: [e-mail]  or ...!mips!zok!info

    Summary: OS: SVR3.2, SVR4
         HW: 8514/A (ATI Ultra), S3 (Diamond Stealth), SVGA
         Other: Motif, Dual-headed server

     3) Consensys Corporation
    1301 Pat Booker Rd.
    Universal City, TX 78148
    Phone: [phone]
    FAX:   [phone]
    email: [e-mail]

    Summary: OS: Consensys V4.2, Consensys' version of
             Unix System V Release 4.2
         HW: X11R4 server support for VGA, SVGA
         Other: MoOLIT, Motif, X11R5 Clients

     4) The Santa Cruz Operation, Inc.
    p.o. box 1900
    Santa Cruz, California 95061
    [phone], (800) SCO UNIX,
    FAX: [phone]
    email: [e-mail]

    Summary: OS: ODT 1.1, ODT 2.0, ODT 3.0
         HW: X11R5 server support for SVGA, 8514/A, S3, TMS340x0,
             WD90C31, XGA2, QVision, misc. localbus video systems
             (see Hardware Compatibility Handbook for actual card
             vendors).
         Other: Motif

     5) Answer Software & Consulting
    p.o. box 14171
    Columbus, Ohio 43214
    614-263-XLAB
    email: [e-mail]

    Summary: OS: Coherent 4.0.1r72 or greater
         HW: works with any VESA compliant video


     6) OpenWindows (shipped as part of the Solaris for x86 OS)
    SunSoft Inc.
    2550 Garcia Ave.
    Mountain View, CA  94043
    Phone: [phone]

    Summary: OS: Solaris for x86, SunSoft's version of SVR4
         HW: Orchid ProDesigner II, Compaq QVision, Paradise
             Accelerator Board, ET 4000 video card with VESA
             configuration file, WD90C30 video card with VESA
             configuration file, IBM XGA.
         Other: X11R4 clients, XView, OLIT, DeskSet

  NOTE: Other commercial vendors (including OS vendors describing
    bundled software) are welcome to submit summary information
    summary information such as the above.

II) What is XFree86 and where do I get it?

3. What is XFree86?

   XFree86 is an enhanced version of X386 1.2, which was distributed with
   X11R5.  This release consists of many bug fixes, speed improvements, and
   other enhancements. The release is available as source patches against the
   MIT X11R5 code, as well as binary distributions for many architectures.

   The following items have been added since XFree86 1.3 was released in
   June 1993:

    1) Support for the following accelerated chipsets has been added:
        IBM 8514/A and true compatibles
        ATI Mach8, Mach32
        S3 86C911, 86C924, 86C801, 86C805, 86C928
        Cirrus 5426, 5428
        WD 90C31
       (see the file AccelCards for information on which specific cards
       have been tested).
    2) Support for the following SVGA chipsets has been added:
        Cirrus 62x5
        OAK OTI067, OTI077
    3) A 16 colour generic VGA server (this server is still experimental
       but quite usable at this stage).
    4) Support for "banked dumb monochrome" boards.  Currently the
       Hyundai HGC1280 is supported.
    5) Support for the following operating systems has been added:
        OSF/1
        BSD/386 1.0
        NetBSD 0.9
        FreeBSD 1.0
       In addition, an OS porting layer has been defined inside the
       device-dependent layer of the server to make further OS ports
       simpler and to ensure that all future servers are supported
       on all OS platforms.
    6) Support for the syscons driver (with VT switching) for 386BSD,
       FreeBSD and NetBSD.
    7) Support for the Hitachi Puma Plus tablet as an input device.
    8) The SuperProbe program introduced with XFree86 1.3 has been updated
       to detect many more chipsets and to be more reliable overall.
    9) A new README.Config file is included with step-by-step instructions
       for setting up the Xconfig file.  This file includes a list of
       generic video mode settings which should provide working modes
       for most video displays.
   10) Several dozen bug fixes for problems detected and reported for
       XFree86 1.3.
   11) Hard limits for the maximum dot-clock frequency used are introduced.
       These provide a rudimentary means of protecting the graphic boards
       from overclocking. (See the Known Bugs section for some more details).

   Plus a number of other small things.  Refer to the CHANGELOG file in the
   source distribution for full details.

   Here is a list of the other significant features that XFree86 adds over
   stock X386 1.2 (X11R5):

    1) New servers to support S3, ATI and 8514 accelerated hardware, and
       support for Cirrus and Western Digital accelerated hardware in
       the SVGA server.
    2) The SpeedUp package from Glenn Lai is an integral part of the
       SVGA server, selectable at run-time via the Xconfig file.  Some
       SpeedUps require an ET4000 based SVGA, and others require a
       virtual screen width of 1024.  The SpeedUps suitable to the
       configuration are selected by default.  With a high-quality
       ET4000 board, this can yield up to 40% improvement of the Xstones
       benchmark over X386 1.2.
    3) The fX386 packages from Jim Tsillas are included as the default
       operating mode of the SVGA server if SpeedUp is not selected.
       This mode is now equivalent in performance to X386 1.1b (X11R4),
       and approximately 20% faster than X386 1.2.
    4) A monochrome server that supports bank-switching of available SVGA
       memory to allow virtual screens up to 1600x1200.
    5) Support for the Hercules mono card in the monochrome server, and
       with it the ability to support a "two headed" server - one mono
       VGA, and one Hercules.
    6) Support for Hyundai HGC1280 monochrome graphics card in the
       monochrome server.
    7) An (experimental) 16-color VGA server is included, which supports
       generic VGA hardware.
    8) SVR3 shared libraries, tested under ISC SVR3 2.0.2, 2.2, 3.0.1 and
       4.0; SCO 3.2.2, 3.2.4.
    9) Support for Linux, 386BSD, NetBSD, FreeBSD, BSD/386, Mach, OSF/1,
       SVR4.2, SCO, Amoeba, and Minix-386. Including Linux shared libraries.
   10) Support for LOCALCONN.  This support is for both SVR3.2 and SVR4.
       For SVR4.0.4 with the 'Advanced Compatibility Package' and on
       SVR4.2, local connections from SCO XSight/ODT clients are supported.
   11) Drivers for ATI, Trident, NCR, Compaq, Cirrus, and OAK SVGA chipsets.
       Refer to chipset-specific README files for details about these
       drivers.
   12) Support for compressed bitmap fonts has been added (Thomas
       Eberhardt's code from the contrib directory on ftp.x.org).
   13) Type1 Font code from MIT contrib tape has been included, and is
       compile-time selectable.  There are contributed Type1 fonts in the
       contrib directory on ftp.x.org.
   14) New configuration method which allows the server's drivers and font
       renderers to be reconfigured from both source and binary
       distributions.
   15) Greatly improved documentation and configuration databases are
       included.
   16) A new tutorial on how to develop correct video card and monitor
       timing data, written by Eric Raymond (derived from previous
       documentation and a lot of experimentation).
   17) Greatly improved support for international keyboards, including
       implementation of the Compose key functionality found on many
       vendor servers.
   18) Many enhancements in error handling and parsing of the Xconfig
       configuration file.  Error messages are much more informative and
       intuitive, and more validation is done.  There are many new options
       that can be enabled in the Xconfig file.

   Also included are a tutorial on monitor timing by Eric Raymond, and the
   current X386 mode database and a sample xdm configuration by David Wexelblat.

   Known bugs in XFree86:

    1) There are some problems with some of the 'xset fp' operations (in
       particular 'xset fp rehash').  These seem to be caused by memory
       allocation/deallocation problems in the server's font code.  We
       believe that we have worked around this problem, but have not yet
       solved the root cause.
    2) While not strictly a bug, there is currently a limitation on the
       dot-clock frequencies allowed in the S3 and Mach32 servers.  For
       S3 cards with the Bt485 RAMDAC (e.g. #9 GXe), the limit is 85Mhz.
       For Mach32 boards, the limit is 80Mhz.  There is some special
       programming required to use these RAMDACs at higher dot-clocks,
       and we were not able to get it fully developed in time.  We intend
       to release a patch with these updates in the near future.

4. What OSs are supported?

    SVR4.0:
    Esix: 4.0.3A, 4.0.4
    Microport: 2.2, 3.1, 4.1, 4.2
    Dell: 2.1, 2.2
    UHC: 2.0, 3.6
    Consensys: 1.2
    MST: 4.0.3 (Load 2.07 and Load 3.02)
    ISC: 4.0.3
    AT&T: 2.1, 4.0
    NCR: MP-RAS

    SVR4.2:
    Consensys
    Univel UnixWare

    SVR3:
    Interactive: 2.0.2, 2.2, 3.0, 4.0
    SCO: 3.2.2, 3.2.4
    AT&T: 3.2.2

    Others:
    386BSD 0.1, NetBSD 0.9, FreeBSD 1.0
    BSD/386 1.0
    Mach 386
    OSF/1
    Linux 0.99pl13
    Amoeba
    Minix-386

    Note that Esix 3.2D is not supported yet, but anyone should feel
    free to submit patches.  If you are interested in tackling this,
    send mail to [e-mail]

5. What video hardware is supported?

   At this time, XFree86 2.0 supports the following accelerated chipsets:

    8514/A (and true clones)
    ATI Mach8, Mach32
    Cirrus CLGD5426, CLGD5428
    S3 86C911, 86C924, 86C801, 86C805, 86C928
    Western Digital WD90C31

    The Cirrus and Western Digital accelerators are supported in the SVGA
    server; the other chipsets each have their own server.  A list of cards
    on which the accelerated servers have been tested is included in the file
    AccelCards.  They may well work on other cards, but we cannot guarantee it.
    Linux and BSD users of the XS3 server are referred to the README.XS3
    file for information on the differences between XS3 and the XFree86 S3
    server. Xconfig files must be changed when using XF86_S3 instead of XS3.

   In addition, the following SVGA chipsets are supported:

    Tseng ET3000, ET4000AX, ET4000/W32
    Western Digital/Paradise PVGA1
    Western Digital WD90C00, WD90C10, WD90C11, WD90C30, WD90C31
    Genoa GVGA
    Trident TVGA8800CS, TVGA8900B, TVGA8900C, TVGA8900CL, TVGA9000
    ATI 28800-4, 28800-5, 28800-a
    NCR 77C22, 77C22E
    Cirrus Logic CLGD5420, CLGD5422, CLGD5424, CLGD5426, CLGD5428,
         CLGD6205, CLGD6215, CLGD6225, CLGD6235
    Compaq AVGA
    OAK OTI067, OTI077

    All of the above are supported in both 256 color and monochrome modes,
    with the exception of the ATI and Cirrus chipsets, which are only
    supported in 256 color mode.

    Refer to the chipset-specific README files (currently for Tseng, Western
    Digital, ATI, and Trident) for more information about using those chipsets.

    The monochrome server also supports generic VGA cards, using 64k of video
    memory in a single bank, the Hercules card, and the Hynudai HGC1280 card.
    On the Compaq AVGA, only 64k of video memory is supported for the monochrome
    server, and the GVGA has not been tested with more than 64k.

    XFree86 2.0 includes an experimental 16-color generic VGA server.  This
    server has not been as extensively tested and debugged as the others, but
    it should work rather well (but slowly) on most hardware.  At this time,
    it does not support banking, hence display is currently limited to 64k
    of memory (approximately 800x600).

      Note
      ----
    It appears that some of the SVGA card manufacturers are going to
    non-traditional mechanisms for selecting pixel-clock frequencies.  To
    avoid having to modify the server to accommodate these schemes XFree86 1.2
    added support for using an external program to select the pixel clock.
    This allows programs to be written as new mechanisms are discovered.
    Refer to the README.clkprog file for information on how these programs
    work, if you need to write one.  If you do develop such a program, we
    would be interested in including it with future XFree86 releases.

    NOTE: The Diamond SpeedStar 24 (and possibly recent SpeedStar+) boards are
          NOT supported, even though they use the ET4000. The same is valid
          for all of Diamond's S3 boards. The reason for this is that
          Diamond has changed the mechanism used to select pixel clock
          frequencies, and will only release programming information under
          non-disclosure.  We are not willing to do this (as it would mean
          that source cannot be provided).  We have had discussions with
          Diamond over this, and they do not intend to change this policy.
          Hence we will do nothing to support Diamond products going forward
          (i.e. don't send us a program to run to set their clocks).  XFree86
          DOES NOT SUPPORT DIAMOND HARDWARE.  It is possible to make some
          of it work, but we will not assist in doing this.

6. Who else supports accelerated boards?

    This support is available in commercial products from SGCS and
    MetroLink (for SVR3 and SVR4).

    An S3 server is available for 386BSD and Linux.  Contact
    <[e-mail]> for 386BSD or <???> for Linux.

    A beta 8514/A server is available for Linux. Contact <[e-mail]>.
    Note: these servers are NOT part of XFree86.

7. Why doesn't XFree86 support 16-color VGA modes?

    This section will disappear in the future, as XFree86 2.0 supports
    16-color VGA.

8. What other hardware or software requirements are there?

    Obviously, a supported SVGA board and OS are required.  To run
    X efficiently, 12-16MB of real memory should be considered a minimum.
    The various binary releases take 10-40MB of disk space, depending
    on the OS (e.g. whether or not it supports shared libraries).
    To build from sources, at least 80MB of free disk space will
    be required, although 120MB should be considered a comfortable
    lower bound.

9. Where can I get source for XFree86?

    Source patches based on X11R5 PL25, from MIT, and as an upgrade from
    XFree86 1.3 are available via anonymous FTP from:
        ftp.x.org (under /contrib/XFree86)
        ftp.physics.su.oz.au (under /XFree86)
        ftp.win.tue.nl (under /pub/XFree86)
        ftp.prz.tu-berlin.de (under /pub/pc/src/XFree86)

    (For the rest of this FAQ, these 4 location will be called $FTP)

    Refer to the README file under the specified directory for information
    on which files you need to get to build your distribution (which will
    depend on whether this is a new installation or an upgrade from an
    earlier version of XFree86).

10. Where can I get binaries for XFree86?

    Binaries are available via anonymous FTP from:
       ftp.physics.su.oz.au            - SVR4 binaries
                under /XFree86/SVR4
       ftp.win.tue.nl                  - SVR4 binaries
                under /pub/XFree86/SVR4
       ftp.tcp.com                     - SVR4 binaries
                under /pub/SVR4/XFree86
       stasi.bradley.edu               - SVR4 binaries
                under /pub/XFree86/SVR4
       stasi.bradley.edu               - SVR3 (SCO) binaries
                under /pub/XFree86/sco
       ftp.physics.su.oz.au            - SVR3 (SCO) binaries
                under /XFree86/SCO
       blancmange.ma.utexas.edu        - SVR3 (ISC) binaries
                under /pub/ISC
       ftp.prz.tu-berlin.de            - SVR3 (ISC) binaries
                under /pub/pc/isc/XFree86
       tsx-11.mit.edu                  - Linux binaries
                under /pub/linux/packages/X11
       ftp.unipi.it                    - Linux binaries
        under /pub/linux/XFree86_2.0
       XFree86.cdrom.com               - FreeBSD binaries
        under /pub/XFree86/FreeBSD/XFree86-2.0
       gil.physik.rwth-aachen.de       - FreeBSD binaries
        under /pub/XFree86
       agate.berkeley.edu              - NetBSD 0.9 binaries
        under /pub/NetBSD/ports
       sun-lamp.cs.berkeley.edu        - NetBSD 0.9 binaries
        under /pub/NetBSD/ports
       ftp.cs.mcgill.ca                   - NetBSD 0.9 binaries
            under /pub/NetBSD/XFree86
       ftp.cs.uwm.edu                  - Mach386 binaries
                under /i386

    Ensure that you are getting XFree86 2.0 - some of these sites may archive
    older releases as well.  Each binary distribution will contain a README
    file that describes what files you need to take from the archive, and
    which compile-time option selections were made when building the
    distribution.

IV) What general things should I know about running XFree86?

11. Installation directories

    The top-level installation directory is specified by the ProjectRoot
    (/usr/X386, by default) variable in config/site.def. Binaries, include
    files, and libraries are installed in $ProjectRoot/{bin,include,lib}.

    This can be changed when rebuilding from sources, and can be modified
    via symbolic links for those OSs that support them. This directory is
    nonstandard, and was chosen this way to allow XFree86 to be installed
    alongside a commercial/vendor-supplied X implementation.

12. Configuration files

    The XFree86 server reads a configuration file ("Xconfig") on startup.
    The search path, contents and syntax for this file are documented in
    the server manpage, which should be consulted before asking questions.

13. Determining VGA dot clocks and monitor modes

    David E Wexelblat ([e-mail]) maintains a database of known
    clock settings for VGA cards and monitor settings.
    The database is installed in /usr/X386/lib/X11/etc/modeDB.txt, and
    is in the source tree under mit/server/ddx/x386/etc. This database is
    also available from him (for the latest copy), and is kept on
    export.lcs.mit.edu in ~/contrib/X386.modeDB.Z, which is updated
    occasionally.  Obtain a copy of this database.  It just might have the
    settings you need.  If you create new settings, please send them to
    David for inclusion in the database.

    If this doesn't help you, the VideoModes.doc (by Eric Raymond) file
    with XFree86 contains tutorials on how to come up with these timings.
    It may be helpful to start with settings that almost work, and use
    this description to get them right.  When you do, send the information
    to David Wexelblat for inclusion in the database.

    NOTE: The old 'clock.exe' program is not supported any more, and
      is completely unnecessary.  If you need to determine dot
      clock values for a new board, remove the 'Clocks' line from
      your Xconfig file (if present), and start the server.  The
      server will probe for clocks itself and print them out.
      You can use these values to put a 'Clocks' line into your
      Xconfig file, which is not necessary, but will speed up
      starting the server in the future.

14. Rebuilding/reconfiguring the server from the link kit

    If you have installed the server Binary Link Kit, it is possible to
    reconfigure the drivers and font renderers in the server.  This is
    fully explained in the README file that is available with the link kit.

V) What OS-specific things should I know about running XFree86?

    First of all, the server must be installed suid-root (mode 4755).

15. SVR4
    Why won't my xterm run properly?

    If your kernel is not built with the consem module, you should define
    CONSEM=no in you environment. Otherwise xterm won't run.
    csh users should use 'setenv CONSEM no'

    The Esix console driver patch 403019 is known to cause keymapping
    problems with XFree86.  It recommended that this patch not be
    installed.  Alternatively they keymap can be fixed with xmodmap.

16. SVR3

    Make sure you look at $FTP/README.ISC, if that's what you are running.

17. 386BSD

    Make sure you look at $FTP/README.386BSD.

    Also, a separate 386BSD FAQ is maintained by Richard Murphey
    <[e-mail]>.  The latest version should be available in the
    file XFree86-1.2-386BSD-FAQ at the following ftp sites:

    agate.berkeley.edu:/pub/386BSD/0.1-ports/XFree86-1.2
    wuarchive.wustl.edu:/mirrors4/386bsd/0.1-ports/XFree86-1.2
    grasp.insa-lyon.fr:pub/386BSD/0.1-ports/XFree86-1.3

18. Linux

    You must be running Linux 0.99pl13 or greater, and have the 4.4.1 gcc
    jump libraries and ld.so-1.3 installed.

    Make sure all the servers XF86_*, xload and xterm are setuid root.

    If your kernel doesn't have TCP support compiled in, you'll have to
    run the server as "X -pn". The default startup configuration assumes
    that TCP is not available. If it is, change the two files
    /usr/X386/bin/startx and /usr/X386/lib/X11/xdm/Xservers, removing the
    -pn argument to X386.

    Make sure /dev/console is either a link to /dev/tty0 or has the major
    number 4, minor number 0. Also note that if /dev/console is not
    owned by the user running X, then xconsole and xterm will not permit
    console output redirection. Xdm will properly change the owner, but
    startx won't.

    When running xdm from rc.local, you will need to provide it with
    a tty, for example "xdm < /dev/console &".

    For more detailed information, please read the files README and
    X11-HOWTO present with the distribution on tsx-11.mit.edu.

19. Mach

    Make sure you look at $FTP/README.Mach.

VI) What things should I know for building XFree86 from source?

    This section has been removed from the FAQ, since it is
    fully explained in $FTP/README and the OS-specific READMEs.
    Please look at those files for information on building XFree86.

VII) Is there anything special about building clients with XFree86?

20. BSD compatibility library

    A lot of clients make use of BSD functions like bcopy(), etc.
    The default configuration files are set up to link with libXbsd.a
    which contains emulation for bcopy(), bzero(), bcmp(), ffs(), random(),
    seed(). A better way of providing the 'b' functions is to include
    <X11/Xfuncs.h> in source files that call them.  Xfuncs.h provides macro
    definitions for these in terms of the SYSV 'mem' functions.  If you are
    linking with a vendor supplied library which calls some of these
    functions, then you should link with libXbsd.a

21. ANSICCOPTIONS

    This is something that was added to allow a developer to get rid of the
    ANSI-ness defined in the default CCOPTIONS without having to rewrite
    the entire CCOPTIONS line.  For example, with stock MIT, you'd see
    something like
        CCOPTIONS="-ansi -O2 -fwritable-strings"
    and to get rid of the ANSI-ness, the developer would have to put
        CCOPTIONS="-O2 -fwritable-strings"
    in his Imakefile.  With this change, you would see a default of
        ANSICCOPTIONS="-ansi"
        CCOPTIONS="-O2 -fwritable-strings"
    and all the developer would have to put in the Imakefile is:
        ANSICCOPTIONS=
    to get rid of the ANSI-ness (many X clients will die a horrible death
    with -ansi).  The effect is even more dramatic in practice, because
    CCOPTIONS is actually quite complex.  The other issue is that one must
    add 'ANSICCOPTIONS=$(ANSICCOPTIONS)' to a PassCDebugFlags definition.

VIII) Where to get more information

    Additional documentation is available in the XFree86(1), Xconfig(4/5),
    XF86_SVGA(1), XF86_Mono(1), XF86_VGA16(1), XF86_Accel(1) and XF86keybd(1)
    manual pages.  In addition, several README files and tutorial documents are
    provided.  These are available in /usr/X386/lib/X11/etc in the binary
    distributions, and in mit/server/ddx/x386 and ddx/x386/etc in the source
    distribution.

    The files README.Config and VideoModes.doc should be consulted for
    information on how to set up the XFree86 servers.  All supplied documents
    and manual pages should be read before contacting the XFree86 team for
    assistance.

    Documentation on SVGA driver development can be found in the directory
    /usr/X386/lib/Server/VGADriverDoc in the binary distribution, and in the
    directory mit/server/ddx/x386/VGADriverDoc in the source distribution.

    There exists a Usenet news group comp.windows.x.i386unix that contains
    mostly discussions about XFree86 and related topics. Many questions can
    be answered there.

    If you are totally at a loss, you can contact the XFree86 Core Team at
    [e-mail].

    --------------------------------------------------

XFree86 Contact Information

    Ongoing development planning and support is coordinated by the XFree86
    Core Team.  At this time the Core Team consists of (in alphabetical order):

       Robert Baron <[e-mail]>
       David Dawes <[e-mail]>
       Dirk Hohndel <[e-mail]>
       Glenn Lai <[e-mail]>
       Rich Murphey <[e-mail]>
       Jon Tombs <[e-mail]>
       David Wexelblat <[e-mail]>, <[e-mail]>
       Thomas Wolfram <[e-mail]>
       Orest Zborowski <[e-mail]>

    E-mail sent to <[e-mail]> will reach all of the Core Team.

    --------------------------------------------------

Thanks to all the people who already sent me corrections or additions,
especially David Wexelblat (one of the major contributors of updates).
--
Steve Kotsopoulos  P.Eng.           mail:   [e-mail]
Systems Analyst                     bitnet: [e-mail]
Engineering Computing Facility      uucp:   uunet!utai!ecf!steve
University of Toronto               phone:  [phone]