This file is indexed.

/usr/lib/petscdir/3.1/include/finclude/ftn-auto/petscpf.h90 is in libpetsc3.1-dev 3.1.dfsg-11ubuntu1.

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        subroutine PFApplyVec(pf, x, y ,ierr)
       PF pf ! PF
       Vec x ! Vec
       Vec y ! Vec
       integer ierr
       end subroutine
        subroutine PFApply(pf, n, x, y ,ierr)
       PF pf ! PF
       PetscInt n ! PetscInt
       PetscScalar x ! PetscScalar
       PetscScalar y ! PetscScalar
       integer ierr
       end subroutine
        subroutine PFView(pf, viewer ,ierr)
       PF pf ! PF
       PetscViewer viewer ! PetscViewer
       integer ierr
       end subroutine
        subroutine PFSetFromOptions(pf ,ierr)
       PF pf ! PF
       integer ierr
       end subroutine