Issue deprecation warning for FC=mpifort

 - Also fix issue in CAF script arising from the use of FC=mpifort

Author: zbeekman

CMakeLists.txt

@@ -214,9 +214,11 @@ get_filename_component( C_COMPILER_DIR "${CMAKE_C_COMPILER}"
   REALPATH )
 
 if (FTN_COMPILER_NAME MATCHES "^[mM][pP][iI]")
+  message( DEPRECATION "Setting the Fortran compiler to an MPI wrapper script is deprecated!")
   set (MPI_Fortran_COMPILER "${CMAKE_Fortran_COMPILER}")
 endif()
 if (C_COMPILER_NAME MATCHES "^[mM][pP][iI]")
+  message( DEPRECATION "Setting the Fortran compiler to an MPI wrapper script is deprecated!")
   set (MPI_C_COMPILER "${CMAKE_C_COMPILER}")
 endif()
 

src/extensions/caf.in

@@ -195,12 +195,16 @@ if [[ -n "${mpi_link_flags[*]:-}" ]]; then
 fi
 
 # Now do libraries, IN CORRECT ORDER, to append to command
-for lib in "${caf_libs[@]:-}"; do
-  caf_added_libs+=("${prefix%/}/${lib}")
-done
-for lib in "${mpi_libs[@]:-}"; do
-  caf_added_libs+=("${lib}")
-done
+if [[ -n "${caf_libs[*]:-}" ]]; then
+  for lib in "${caf_libs[@]:-}"; do
+    caf_added_libs+=("${prefix%/}/${lib}")
+  done
+fi
+if [[ -n "${mpi_libs[*]:-}" ]]; then
+  for lib in "${mpi_libs[@]:-}"; do
+    caf_added_libs+=("${lib}")
+  done
+fi
 
 usage() {
   echo ""