Hi All, As Joachim said in a mail where I requested the same thing: [1] (if correct) lists the compatibility matrix of ghc and llvm so 7.10 llvm 3.5 7.11 llvm 3.6 [1] http://smart-cactus.org/~ben/posts/2014-11-28-state-of-llvm-backend.html cheers, Gianfranco