[CMake] FortranCInterface not working with 3.9.0 with Intel 2015

[JR Cary]

Works with 3.8.2.

Compilers specified by

-DCMAKE_C_COMPILER:FILEPATH='C:/Program Files (x86)/Intel/Composer XE
2015/bin/intel64/icl.exe' -DCMAKE_CXX_COMPILER:FILEPATH='C:/Program
Files (x86)/Intel/Composer XE 2015/bin/intel64/icl.exe'
-DCMAKE_Fortran_COMPILER:FILEPATH='C:/Program Files (x86)/Intel/Composer
XE 2015/bin/intel64/ifort.exe'

The cmake code is

include(FortranCInterface)
FortranCInterface_HEADER(
  ${CMAKE_BINARY_DIR}/FCMangle.h
  MACRO_NAMESPACE "FC_"
  SYMBOL_NAMESPACE "FC_"
  SYMBOLS mysub mymod:my_sub
)

The relevant output is

-- Detecting Fortran/C Interface
-- Detecting Fortran/C Interface - Failed to compile
CMake Warning (dev) at
C:/winsame/cary/usim/contrib-icl15/cmake-3.9.0-ser/share/
cmake-3.9/Modules/FortranCInterface.cmake:309 (message):
  No FortranCInterface mangling known for mysub
Call Stack (most recent call first):
  scimake/SciFortranChecks.cmake:269 (FortranCInterface_HEADER)
  scimake/SciInit.cmake:232 (include)
  CMakeLists.txt:28 (include)
This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Warning (dev) at
C:/winsame/cary/usim/contrib-icl15/cmake-3.9.0-ser/share/
cmake-3.9/Modules/FortranCInterface.cmake:295 (message):
  No FortranCInterface mangling known for mymod:my_sub
Call Stack (most recent call first):
  scimake/SciFortranChecks.cmake:269 (FortranCInterface_HEADER)
  scimake/SciInit.cmake:232 (include)
  CMakeLists.txt:28 (include)
This warning is for project developers.  Use -Wno-dev to suppress it.

The resulting file is

$ cat FCMangle.h
#ifndef FC_HEADER_INCLUDED
#define FC_HEADER_INCLUDED

/*--------------------------------------------------------------------------*/
/* Mangle some symbols
automatically.                                       */

#endif

Any help appreciated..........John Cary