D for embedded system

[Timo Sintonen]

I have started to make a minimum libdruntime. First I compiled 
object and now I am adding files one by one when needed.
The compiler generates lots of library calls. So far I have found 
these flags to get the code smaller and to reduce library calls: 
-fno-assert -fno-invariants and -fno-bouns-check.
Is there any other options that would make the executable more 
simple?