id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
882	Added option to build and make configuration scripts to use mpiifort	arango		"In some computers, the Intel MPI library is installed with the '''ifort''' compiler. Thus, we need to use the '''mpiifort''' wrapper instead of the generic '''mpif90'''. Notice that in some '''ifort''' versions, the '''mpif90''' wrapper is also available but linked to '''gfortran'''.  It is very confusing and the compilation fails with errors like:

{{{
gfortran: error: unrecognized command line option ‘-fp-model’
gfortran: error: unrecognized command line option ‘-ip’; did you mean ‘-p’?
gfortran: error: unrecognized command line option ‘-traceback’
gfortran: error: unrecognized command line option ‘-check’; did you mean ‘-fcheck=’?
gfortran: error: unrecognized command line option ‘-check’; did you mean ‘-fcheck=’?
gfortran: error: unrecognized command line option ‘-module’; did you mean ‘-mhle’?
}}}

Therefore, the ROMS build scripts ('''cbuild_roms.csh''', '''cbuild_roms.sh''', '''build_roms.csh''', and '''build_roms.sh''')  are enhanced to include an option to compile with the '''mpiifort''' wrapper.  For example, in '''build_roms.sh''', we now have:

{{{
# Other user defined environmental variables. See the ROMS makefile for
# details on other options the user might want to set here. Be sure to
# leave the switches meant to be off set to an empty string or commented
# out. Any string value (including off) will evaluate to TRUE in
# conditional if-statements.

 export           USE_MPI=on            # distributed-memory parallelism
 export        USE_MPIF90=on            # compile with mpif90 script
#export         which_MPI=intel         # compile with mpiifort library
#export         which_MPI=mpich         # compile with MPICH library
#export         which_MPI=mpich2        # compile with MPICH2 library
#export         which_MPI=mvapich2      # compile with MVAPICH2 library
 export         which_MPI=openmpi       # compile with OpenMPI library
}}}

including an additional value for the environmental variable '''which_MPI=intel'''.

Now, in the make configuration script for the '''ifort''' compiler ('''Linux-ifort.mk'''), the '''FC''' macro is initialized to the appropriate wrapper:

{{{
ifdef USE_MPI
         CPPFLAGS += -DMPI
 ifdef USE_MPIF90
  ifeq ($(which_MPI), intel)
               FC := mpiifort
  else
               FC := mpif90
  endif
 else
             LIBS += -lfmpi -lmpi
 endif
endif
}}}

In '''compiler_flags_Intel_Fortran.cmake''', we need to specify the appropriate compiler wrapper for '''CMake''':

{{{
if( MPI )
  if( ${COMM} MATCHES ""intel"")
    set( CMAKE_Fortran_COMPILER mpiifort )
  else()
    set( CMAKE_Fortran_COMPILER mpif90 )
  endif()
else()
  set( CMAKE_Fortran_COMPILER ifort )
endif()
}}}
"	upgrade	closed	major	Release ROMS/TOMS 4.0	Nonlinear	3.9	Done