Hi,

I tried to get GHC working from the repo in Mac OS X following the instructions in https://gitlab.haskell.org/ghc/ghc/wikis/building/preparation/mac-osx. At first I got the "error __GNU_MP_VERSION not defined" problem, for which the guide recommends to prepend "CC=clang"  to "./configure" , which I did. But even then, I also had to install "gmp" using "brew install gmp".