More agressive entity removal during linking

[Jeffrey A Law]

  In message < Pine.LNX.3.96.991209003754.5211T-100000@wakko.deltatee.com >you wr
ite:
  > > There is an option to do this, but it requires target specific compiler,
  > > assembler and linker support as well as a modern object format such as EL
  > F
  > > (coff is too lame, sorry).
  > 
  > Alright - is it possible to do this with GCC?
It depends on the specific port and whether or not the necessary hacks have
been added to all the necessary components of that port.

  >  I have no quams about
  > switching the output target format for the compiler. Which format should I
  > use and which linker/compiler/assembler option turns this on (presumably
  > --gc-sections?) ?
You would want to use ELF.  Yes --gc-sections is the right linker option.  You
will also need to use -ffucntion-sections so that the compiler puts each
function into its own section.

I do not know if the m68k-elf tools have all the necessary functionality,
particularly the linker.

jeff