LDC -noruntime

[BLM768]

I've been trying to write an OS kernel in D, and I'm having 
issues with the runtime. I'm trying to use LDC's -noruntime 
option, which is _supposed_ to prevent any runtime calls from 
being generated, but the linker keeps complaining about 
unresolved references to _d_assert_msg and other runtime 
functions. It seems that LDC is ignoring the switch and is 
generating runtime references anyway. Is there some other way to 
force it to stop trying to pull in the runtime? I'd rather not 
have to create/link a custom runtime at this point; I don't even 
have a memory allocator written, so I really don't want to mess 
with a runtime yet.