Added -version=Tango in default llvmdc.conf Fixed problem with array casts, all DWT modules needed for HelloWorld1 samples now compile. Still some linking issues.

module union1;

union U
{
    float f;
    int i;
}

void main()
{
    float f = 2;
    U u = U(f);
    assert(u.i == *cast(int*)&f);
}