Fortran support for <LANG>_COMPILER_LAUNCHER

We'd like to use compiler wrappers with CMAKE via the <LANG>_COMPILER_LAUNCHER variable for Fortran as well as C/C++/CUDA. At the moment we work around with an auto generated shell script named tau_<COMPILER>, e.g. tau_gfortran looks like:

#!/bin/sh
#
# WARNING: DO NOT EDIT THIS FILE.
# This file is generated automatically.  Any changes made here may be lost!
#
# Created: 2017-11-21 13:20:13.650415
# Author: jlinford
#
tau gfortran "$@" 

and we use cmake -DCMAKE_Fortran_COMPILER=tau_gfortran. We'd prefer cmake -DCMAKE_Fortran_COMPILER_LAUNCHER=tau -DCMAKE_Fortran_COMPILER=gfortran

Thanks!