Forcing C program to core dump

[Garrett Cooper]

Hello,
    This may be obvious to some, but after some Googling (apparently 
with the wrong search terms, perhaps) and reading the gcc/gdb manpages, 
I can't seem to find out how to get a program to produce core dumps.
    So I was wondering, is there some simple means to produce core dumps 
or a set of conditions that I need to adhere to in order to get the OS 
to core dump the progrdam???
Thanks,
-Garrett