Maximum threads under gdb-5.0 on linux

[Sherwood Botsford]

We've upgraded many of our workstations to Redhat 7.1 and have found 
that the version of gdb supplied now only supports 32 threads.   
Is this a peculiarity of the  Redhat distribution; a limitation 
of some supporting library, or just a macro I need to define.

Preliminarly scans through the code do have not yet revealed
such a macro, but then I'm not familiar with the code.

cd gdb-5.0
find . -type file | xargs grep -i thread > /tmp/foo
grep number /tmp/foo | less
grep -i max /tmp/foo | less 

were not helpfull.

GDB 4.15 from the RH 6.2 will run on a 7.1 machine and will
fuss about a few libraries.  Once those are brought over,
all is well.  

Ideas?