dead code removal

[Mike via D.gnu]

This has been brought up before:
[1] 
http://forum.dlang.org/post/cqzazaqxpwezignixuds@forum.dlang.org
[2] 
http://forum.dlang.org/post/zapxhodqmotriapuefvm@forum.dlang.org

But I'd like to know what GDC's long term plans are to enable 
removing dead code from executables.

(1) Adding a D-specific linker script in GDC that gets 
automagically passed to the linker?
(2) Adding a D-specific linker script to binutils?
(3) LTO in GCC/binutils?

(2) sounds a little weird, but I got the impression from 
discussion [1] that that was part of the plan.  I don't 
understand why binutils should have to know about D's codegen, 
but there's a lot of things I don't understand.

Anyway, please let me know what the plan is, and if there is 
anything I might be able to do to move it forward.

Mike