It looks like petsc-dev is broken: /Users/markadams/Codes/petsc-dev/src/snes/impls/fas/fas.c: In function 'SNESFASCycle_Additive': /Users/markadams/Codes/petsc-dev/src/snes/impls/fas/fas.c:573:5: error: incompatible type for argument 2 of 'VecNorm' /Users/markadams/Codes/petsc-dev/include/petscvec.h:221:24: note: expected 'NormType' but argument is of type 'PetscReal *' /Users/markadams/Codes/petsc-dev/src/snes/impls/fas/fas.c:573:5: error: too few arguments to function 'VecNorm' /Users/markadams/Codes/petsc-dev/include/petscvec.h:221:24: note: declared here make[4]: *** [CMakeFiles/petsc.dir/src/snes/impls/fas/fas.c.o] Error 1 make[4]: *** Waiting for unfinished jobs.... make[3]: *** [CMakeFiles/petsc.dir/all] Error 2