Directions for building GHC via LLVM backend?

[Skirmantas Kligys]

Hello,

I think I remember reading that the LLVM backend can be used to rebuild GHC 
itself.  Naively, I tried the following edit in GHC 7.0.1's mk/build.mk:

# Fast build via LLVM backend:
BuildFlavour = quickllvm

ifeq "$(BuildFlavour)" "quickllvm"
SRC_HC_OPTS        = -H64m -O0 -fllvm -keep-llvm-files
GhcStage1HcOpts    = -O -fllvm -keep-llvm-files
GhcStage2HcOpts    = -O0 -fllvm -keep-llvm-files
GhcLibHcOpts       = -O -fllvm -keep-llvm-files
SplitObjs          = NO
HADDOCK_DOCS       = NO
BUILD_DOCBOOK_HTML = NO
BUILD_DOCBOOK_PS   = NO
BUILD_DOCBOOK_PDF  = NO
endif

That failed.  What I really wanted to get was *.ll LLVM assembler files for the 
standard library.  Any better ideas on how could I get them out of GHC?

Thanks.