Info on using Mesa 3.0 with Linux Quake I and Quake II



Disclaimer
----------

I am _not_ a Quake expert by any means.  I pretty much only run it to
test Mesa.  There have been a lot of questions about Linux Quake and
Mesa so I'm trying to provide some useful info here.  If this file
doesn't help you then you should look elsewhere for help.  The Mesa
mailing list or the news://news.3dfx.com/3dfx.linux.glide newsgroup
might be good.

Again, all the information I have is in this file.  Please don't email
me with questions.

If you have information to contribute to this file please send it to
me at brianp@elastic.avid.com



Linux Quake
-----------

You can get Linux Quake from http://www.idsoftware.com/

Quake I and II for Linux were tested with, and include, Mesa 2.6.  You
shouldn't have too many problems if you simply follow the instructions
in the Quake distribution.



RedHat 5.0 Linux problems
-------------------------

RedHat Linux 5.x uses the GNU C library ("glibc" or "libc6") whereas
previous RedHat and other Linux distributions use "libc5" for its
runtime C library.

Linux Quake I and II were compiled for libc5.  If you compile Mesa
on a RedHat 5.x system the resulting libMesaGL.so file will not work
with Linux Quake because of the different C runtime libraries.
The symptom of this is a segmentation fault soon after starting Quake.

If you want to use a newer version of Mesa (like 3.x) with Quake on
RedHat 5.x then read on.

The solution to the C library problem is to force Mesa to use libc5.
libc5 is in /usr/i486-linux-libc5/lib on RedHat 5.x systems.

Emil Briggs (briggs@tick.physics.ncsu.edu) nicely gave me the following
info:

>   I only know what works on a RedHat 5.0 distribution. RH5 includes
> a full set of libraries for both libc5 and glibc. The loader ld.so
> uses the libc5 libraries in /usr/i486-linux-libc5/lib for programs
> linked against libc5 while it uses the glibc libraries in /lib and
> /usr/lib for programs linked against glibc.
> 
> Anyway I changed line 41 of mklib.glide to
>     GLIDELIBS="-L/usr/local/glide/lib -lglide2x -L/usr/i486-linux-libc5/lib"
> 
> And I started quake2 up with a script like this
> #!/bin/csh
> setenv LD_LIBRARY_PATH /usr/i486-linux-libc5/lib
> setenv MESA_GLX_FX f
> ./quake2 +set vid_ref gl
> kbd_mode -a
> reset


I've already patched the mklib.glide file.  You'll have to start Quake
with the script shown above though.



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$Id: README.QUAKE,v 1.1 1998/07/29 01:15:40 brianp Exp $