profiling C code

I'd like to profile some C code that I'm calling using .Call(). Could
someone point me towards some instructions for doing this, or suggest a
way to go about it (other than creating an independent C program from my
code?)?

Thanks a lot,

Dan

-------------------------------------------------------------
Dan Davison     
Committee on Evolutionary Biology, University of Chicago, USA
Field Museum of Natural History, Chicago, USA
http://home.uchicago.edu/~davison/