Even in full/pro mode, merely adding an unrelated source file to the
project (which never gets referenced/called in the code) adds a
significant amount of data to the program space. Shouldn't the compiler
be smart enough to remove the unused code? This is probably the simplest
optimization that can be done. And xc32 is basically gcc, so what's
going on? I'd expect any half-decent C compiler to omit code that
doesn't get called, especially when invoked with the -Os (optimize for
size) flag.

Nothing in the extra code is even declared volatile, so I can't think of
any reason at all why it's getting added to the compiled output.

Furthermore, declaring macros like this:
#define abc 48e6
as opposed to this:
#define abc 48000000
also adds significant size (around +6% on a PIC32MX220F032B) to the
program space usage.

What could I possibly be doing wrong?
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