gdb help, attaching to specific threads

[Shane McDaniel]

I have a program that creates a thread and I would like to be able to use
two instances of gdb to follow each thread separately, ie the main thread
and the thread I create.  Attaching to the main one is easy enough but how
do I attach to the second?  and how do I keep the gdb on the main thread
from jumping over to the second thread when I hit a break point in
it,which is what usually happens when I use 1 instance of gdb to debug
threads.

I apologize if this is the wrong place but I couldn't find any actual gdb
help groups on my newsserver.

-shane