Can't compile HDirect

[George Russell]

I get the following error (on a Solaris box, latest sources of everything):

../../ghc/driver/ghc-inplace -fglasgow-exts -Rghc-timing -H16m -Wall -recomp -static   
 -H30m -c MarshallAuto.lhs -o MarshallAuto.o -osuf o
ghc-inplace: ignoring heap-size-setting option (-H16m)...not the largest seen

MarshallAuto.lhs:215: Variable not in scope: `auto_vt'