I'm striving with a very common problem: fitting
a BIG program in a tight space. Seems a common one, right ? :-)

I'm using the CCS compiler v2.666.

How can I reorganize my sources in order to minimize the
"unused fragments" that the compiler reports ?

I get this:

------------------------------ (cut)
               ROM used: 3144 (77%)
                         3441 (84%) including unused fragments
               RAM used: 86 (45%) at main() level
                         103 (54%) worst case
               Stack:    6 worst case (5 in main + 1 for interrupts)
------------------------------ (cut)

I can imagine some problem of segment alignment, or bank switching
overhead.
But even cutting/pasting some code around, I could'nt manage to reduce
that.
Commenting some of the more heavy functions reduces that. But
I can't find a pattern, in that practice.

What are the most common causes of this "waste" of space ?