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~/D/ncurses-5.9 ❯❯❯ HOMEBREW_MAKE_JOBS=1 VERBOSE=1 brew install ncurses                                                              ⏎
==> Downloading http://ftpmirror.gnu.org/ncurses/ncurses-5.9.tar.gz
Already downloaded: /Library/Caches/Homebrew/ncurses-5.9.tar.gz
/usr/bin/tar xf /Library/Caches/Homebrew/ncurses-5.9.tar.gz
==> ./configure --disable-debug --prefix=/usr/local/Cellar/ncurses/5.9 --mandir=/usr/local/Cellar/ncurses/5.9/share/man --with-shared --with-widec --with-manpage-format=normal --enable-symlinks
./configure --disable-debug --prefix=/usr/local/Cellar/ncurses/5.9 --mandir=/usr/local/Cellar/ncurses/5.9/share/man --with-shared --with-widec --with-manpage-format=normal --enable-symlinks
checking for egrep... grep -E
Configuring NCURSES 5.9 ABI 5 (Mon Nov  5 21:55:27 CET 2012)
checking build system type... x86_64-apple-darwin12.2.0
checking host system type... x86_64-apple-darwin12.2.0

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toMaybe :: a -> Bool -> Maybe a
toMaybe x b  | b          = Just x
             | otherwise  = Nothing

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-- Code:

data HdbcSnaplet = forall conn. IConnection conn => HdbcSnaplet {
    _iConn :: conn
  }

makeLens ''HdbcSnaplet

{-
Error:

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λ include → λ git master* → cabal configure;cabal build
Resolving dependencies...
Configuring hgit2-0.1...
Preprocessing library hgit2-0.1...
i686-apple-darwin11-llvm-gcc-4.2: warning: '-x c' after last input file has no effect
i686-apple-darwin11-llvm-gcc-4.2: no input files
c2hs: Error during preprocessing custom header file


Library

norm2782

I have a function

GIT_EXTERN(int) git_repository_open(git_repository **repository, const char *path);

Return int is a possible error code. Actual value I'm interested in is **repository

Haskell code:


openRepo :: String -> IO (Either GitError Repository)

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c2hs --cppopts='-I.' --cppopts='-U __BLOCKS__' Git2.chs
ghc --make Main.hs
[1 of 2] Compiling Git2             ( Git2.hs, Git2.o )
Linking Main ...
ld: warning: could not create compact unwind for .LFB3: non-standard register 5 being saved in prolog
Undefined symbols for architecture i386:
  "_git_repository_database", referenced from:
      _s1JB_info in Git2.o
  "_git_repository_free", referenced from:
      _s1KY_info in Git2.o