For more understand I would make this for you .

==============
=== C code === my software as describe previous
==============
|
| cc -c mysource.c -asm
|
v
=============
== asm code === converted software and need more
============= module from library
|
| asm -o mysource.asm
|
v
=============== ============
=== object code === === library ====
=============== ============
| |
| |
| - - |
|
| link mysource.obj , library.lib to final.hex
v
========
=final.hex= This file include library
========
|
| disassem final.hex
|
v
==========
=output.asm= I send this file to my friend.
========== it also contain library code.