happy dependency...
Not a major issue but more a point of concern going forward I started the process of compiling ghc from source. I took a fresh git checkout and run configure I then found checking for version of happy... 1.19.9 configure: error: Happy version 1.20 or later is required to compile GHC. However I can't see that Happy 1.20 has been officially released. The happy webpage gives 1.18.5 as the newest version. You can get 1.20 from hackage however it does not install successfully on osx I'm raising a separate issue with the happy maintainer. I did wonder whether the dependency on 1.20 was necessary... regards, David