Optimization, remove unused code from Image

[Labermeier Norbert]

Hi all,

I'd like to remove unused code from my embedded binary image, but I
didn't succeed find the right compiler/linker switch.
With unused code I talk about functions which are not called but part of
a source file.

Main target for me is to reduce code size.

I'm currently working with a PPC and GCC-2.96 from VxWorks. 

I've already tested with -Os to reduce size but I didn't succeed to
remove the unused functions.

Can anybody give me some hints.

Kind regards,

Norbert