How can I use ldc2 and link to full runtime on arm with no OS

[Dan Walmsley via Digitalmars-d]

I'm starting to make attempts to find out what is needed to make 
D finally work on low level embedded targets. I have been using 
LDC2, i compile each .d file to and .o file and link using 
arm-none-eabi-gcc. I have a demo available here: 
Www.github.com/vitalelement/stm32dblinky includes a linked script.

I was originally trying to have a minimal run time approach but 
having read a lot here I don't buy the argument that these 
targets cant run with GC. So id like to now link to the full run 
time if possible and try out the GC.

However there doesn't seem to be any guide on how to do this?

I need to know, how does the run time know which area of ram to 
use for heap? In c/c++ usually we use linked script to provide an 
area of ram for this.

How do I link in the run time and gc, etc?

Many thanks

Dan