Writting SO kernel in D

[Javi]

Hi,
I would like to know the main issues about writting OS kernels in D.

My (hobby) kernel is composed by 2 files: startup.S and kernel.d, neither startup.S nor kernel.d make system calls, of cource.

But kernel.o references the symbol __gdc_persolnality_v0 
Where is It? It seems a kind  of runtime for garbage collector, etc. How can I turn it off? 

Thanks, and sorry for my poor english.
Javi