how 2 compile individual C files inside kernel source

From: Gopal (gopal_bdt_at_indiatimes.com)
Date: 04/28/04 

Date: 27 Apr 2004 23:47:43 -0700

I have to compile individual files for ex:
/usr/src/linux/net/ethernet/eth.c to get eth.o. It has many
dependencies, how to solve them? Do we need to write any script 2
compile that or .....????

If anybody know abt this,

then please reply.

thanks in advance,

Gopal