Trouble Compiling DMD, Druntime, Phobos on Windows

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I'm using Windows 7 x64, but compiling 32-bit DMD. DMD compiles 
fine, but the linker warns about a "Warning 9: Unknown Option : 
LA". After that, when trying to compile Druntime, DMD chokes with 
this error:

"Assertion Failure: 'impl' on line 4930 in file 'mtype.c'".

I looked in the file, but all I could find on line 4930 was:

int TypeAArray::isZeroInit(Loc loc)
{
     return true;
}

So I'm not really sure what's going on here, though I obviously 
did something wrong compiling DMD.