GHC 7.8 compatibility.
GHC 7.8 compatibility.

mrakgr/futhark,HIPERFIT/futhark,diku-dk/futhark,diku-dk/futhark,ihc/futhark,ihc/futhark,ihc/futhark,mrakgr/futhark,diku-dk/futhark,mrakgr/futhark,diku-dk/futhark,HIPERFIT/futhark,diku-dk/futhark,HIPERFIT/futhark