In the "Building the Glasgow Functional Programming Tools Suite", chapter 12, Notes for building under Windows (http://www.haskell.org/ghc/docs/6.2/html/building/winbuild.ht ml), it is said: "Install an executable Happy, from http://www.haskell.org/happy". The latest version of happy in its website is 1.13. When running configure in fptools, however, I get the error:
configure: error: Happy version 1.14 or later is required to compile GHC.
Firstly, discussion about the development versions of GHC usually take place on cvs-ghc@haskell.org rather than here (to avoid confusion). The CVS HEAD currently requires Happy 1.14, which hasn't been released yet. It is available in the source tree (fptools/happy), so to build the CVS HEAD you currently also need to either: (a) check out fptools/happy and use --enable-src-tree-happy when configuring GHC. (b) Build & install Happy separately from CVS Cheers, Simon