NEMO 3.6_STABLE : lib_mpp compilation error with intel 17 and openmpi

[molines]

Context

• Compiling NEMO_3.6_STABLE on brand new machine occigen2 (with intel 17 and openmpi/intel/2.0.1 ) there are catastrophic errors for the compilation of lib_mpp.F90.
• It compiles OK for the trunk revision
• The reported error (repeated many times) is :

  /opt/mpi/openmpi-icc/2.0.1/include/mpif-sizeof.h(17): error #5286: Ambiguous generic interface MPI_SIZEOF: previously declared specific procedure MPI_SIZEOF_COMPLEX128_SCALAR is not distinguishable from this declaration. [MPI_SIZEOF_COMPLEX128_SCALAR]
        SUBROUTINE MPI_Sizeof_complex128_scalar(x, size, ierror)
  ...
  /tmp/ifortqJ6iPG.i90(13215): catastrophic error: Too many errors, exiting
  
  

Analysis

• In lib_mpp.F90 (v3.6_STABLE) the statement

     INCLUDE 'mpif.h'
  

  is repeated 3 times ( At the begining of the module and in 2 subroutines)
• This is the cause of the error. Note that with previous version of the compiler and/or openmpi, it was not a problem

Fix

• remove uncesseary statements in the routines, and only keep the one at the beginning of the module

[molines]

• Just to remember that this is not fixed yet in last revision of 3.6_STABLE, so that compilation of the code fails on occigen.