Hi,

firstly,
re. xmkmf stuff in /usr/X11R6.1/lib/X11/config/

  I've looked, and I'm sure host.def is missing from the x11dev set.  It's 
certainly not on my machine and xmkmf won't run without it.

(site.def tries to #include it)

Secondly, when trying to compile xtank, I get the following error from
gcc 2.7.2.1, Is this a bug? Does anyone want the source file? (Standard 
xtank source release)

gcc -c -g -O    -I. -I../Include -I/usr/X11R6.1/include  -DCSRG_BASED  
-DFUNCPROTO=15 -DNARROWPROTO  -DXTANK_DIR=\"/home/lidl/xtank/src\" -DX11 
-DUNIX -DS1024x864 -DKEYPAD_DETECT -DSTINGY_REDRAW              
-DBATCH_LINES -DBATCH_POINTS -DBATCH_COLOR_LINES                
-DCODE_SIZE=0x20000 -DSTACK_SIZE=0x8000        -DNEW_LIMITS -DTAC_NUKES 
-DMORTORS -DSLOWER              -DMULTI_SYNC -DTHREAD_NULL              
-DALLDEFINES="\"-DX11 -DUNIX -DS1024x864 -DKEYPAD_DETECT 
-DSTINGY_REDRAW                -DBATCH_LINES -DBATCH_POINTS 
-DBATCH_COLOR_LINES       -DCODE_SIZE=0x20000 
-DSTACK_SIZE=0x8000          -DNEW_LIMITS -DTAC_NUKES -DMORTORS 
-DSLOWER             -DMULTI_SYNC -DTHREAD_NULL \""  tagman.c
tagman.c:340: warning: `PROTO' redefined
tagman.c:336: warning: this is the location of the previous definition
tagman.c: In function `MyVehicleIsClosest':
tagman.c:2537: internal error--insn does not satisfy its constraints:
(insn:HI 36 301 304 (set (reg/v:SI 1 r1)
        (plus:SI (mult:SI (reg/v:SI 1 r1)
                (reg/v:SI 1 r1))
            (reg:SI 3 r3))) 36 {mulsi3+3} (insn_list 22 (insn_list 34 
(nil)))
    (expr_list:REG_DEAD (reg/v:SI 1 r1)
        (expr_list:REG_DEAD (reg:SI 3 r3)
            (nil))))
gcc: Internal compiler error: program cc1 got fatal signal 6