Um, building the trunk, I'm seeing:

makeinfo -I 
/home/scratch/PENDING/2002-01-15-maint-doco/src/gdb/doc/../../readline/doc 
-I /home/scratch/PENDING/2002-01-15-maint-doco/src/gdb/doc/../mi -I 
/home/scratch/PENDING/2002-01-15-maint-doco/src/gdb/doc -o ./gdb.info 
gdb.texinfo
/home/scratch/PENDING/2002-01-15-maint-doco/src/gdb/doc/../../readline/doc/rluser.texinfo:1331: 
warning: @sc argument all uppercase, thus no effect.
/home/scratch/PENDING/2002-01-15-maint-doco/src/gdb/doc/gdb.texinfo:14575: 
Next field of node `Installing GDB' not pointed to.
/home/scratch/PENDING/2002-01-15-maint-doco/src/gdb/doc/fdl.texi:2: This 
node (GNU Free Documentation License) has the bad Prev.
/home/scratch/PENDING/2002-01-15-maint-doco/src/gdb/doc/fdl.texi:2: Next 
reference to nonexistent node `Intro'.
/home/scratch/PENDING/2002-01-15-maint-doco/src/gdb/doc/gdb.texinfo:14869: 
Prev field of node `Index' not pointed to.
/home/scratch/PENDING/2002-01-15-maint-doco/src/gdb/doc/fdl.texi:2: This 
node (GNU Free Documentation License) has the bad Next.
makeinfo: Removing output file `./gdb.info' due to errors; use --force 
to preserve.
gmake: *** [gdb.info] Error 2
ac131313@nettle$ makeinfo --version
makeinfo (GNU texinfo) 4.0

Copyright (C) 1999 Free Software Foundation, Inc.
There is NO warranty.  You may redistribute this software
under the terms of the GNU General Public License.
For more information about these matters, see the files named COPYING.

So I've checked in the attached.

Andrew