Building GHC HEAD on OS X 10.9 Mavericks

gistfile1.txt

1) I installed LLVM 3.4
brew install llvm --with-clang --HEAD

2) I used this build.mk:
HADDOCK_DOCS       = NO
BUILD_DOCBOOK_HTML = NO
BUILD_DOCBOOK_PS   = NO
BUILD_DOCBOOK_PDF  = NO
SPLIT_OBJS         = NO
INTEGER_LIBRARY    = integer-simple

3) Austin let me know I needed to pass "-x assembler-with-cpp" to clang when in preprocessor mode, so I wrote a wrapper clang.hs, compiled it, put it in my path, and changed /usr/local/lib/ghc-7.6.2/settings to use it. (it also passes some flags Carter suggested, along with extra include flags, which were necessary as of a couple weeks ago but might have been fixed in the newer DPs)
https://github.com/ghc-ios/ghc-ios-scripts/blob/master/clang-xcode5-wrapper.hs

4) I used 
./configure --with-gcc=clang 
(where clang is the wrapper script above)

5) "inplace/bin/mkdirhier" bootstrapping/. failed mysteriously, so I manually created bootstrapping/ in the ghc build dir.

6) DTrace failed with an "unsupported compiler" error during compilation, so I killed that section in configure.ac
# if test -n "$DtraceCmd"; then
#   if test "x$TargetOS_CPP-$TargetVendor_CPP" = "xdarwin-apple" -o "x$TargetOS_CPP-$TargetVendor_CPP" = "xsolaris2-unknown"; then
#     HaveDtrace=YES
#   fi
# fi

7) I got the error:
libraries/integer-simple/GHC/Integer/Type.hs:836:50:
    Not in scope: ‛.’

libraries/integer-simple/GHC/Integer/Type.hs:847:67:
    Not in scope: ‛.’

I hacked through this by manually find-and-replacing WORD_SIZE_IN_BITS with 64 in Type.hs.

And that's it! make && make install ran to completion and some simple test programs seem to compile and run fine.