xcode + gdc linking problems

[Scott Carver]

So, I'm working on getting XCode working in a semi-reasonable fashion 
with D (I'm a relative beginner at mucking around with XCode this deep, 
and with D as well, so bear with me...). I got all the appropriate 
language specs, compiler plugins, gdc, etc. (I think), and my sample 
program compiles fine, but fails during the linking phase with this:

	/usr/bin/ld: Undefined symbols:
	_main
	__D10TypeInfo_k6__initZ
	__D11TypeInfo_Aa6__initZ
	__D14TypeInfo_Tuple6__vtblZ
	__D3std5stdio12__ModuleInfoZ
	__D3std5stdio8writeflnFYv
	__Dmodule_ref
	___gdc_personality_v0

I did some checking, and found xcode running this during the linking phase:

/usr/bin/gdc -o /Users/fsc/Documents/DTest/build/Debug/DTest -filelist 
/Users/fsc/Documents/DTest/build/DTest.build/Debug/dtool.build/Objects-normal/ppc/DTest.LinkFileList 
-L/Users/fsc/Documents/DTest/build/Debug 
-F/Users/fsc/Documents/DTest/build/Debug  -arch ppc -Wl,-Y,1455

This fails with the same error when I run it from the terminal. I tried 
different variations on this, and found that everything will link and 
run fine if I /remove/ the '-filelist /Users...etc' option, and just 
specify the .o's by hand, ala:

	/usr/bin/gdc -o (...some stuff...)/*.o (... and the rest ...)

In the end, -filelist doesn't seem to work appropriately. Any 
suggestions? Can anyone point me in the right direction as far as 
modifying the computer plugin / specs / whatever, to get things linking 
right? Am I missing something really obvious? Thanks much!

- Scott Carver