[Nek5000-users] Compiling nek5000 with MPI on Mac.

[nek5000-users at lists.mcs.anl.gov]

Hi Nicolai,

Try C compiler cc and

IFMPI="false"

first.

(Otherwise you need to be consistent and use mpif77 installed for gfortran)

Aleks





________________________________
From: nek5000-users-bounces at lists.mcs.anl.gov [nek5000-users-bounces at lists.mcs.anl.gov] on behalf of nek5000-users at lists.mcs.anl.gov [nek5000-users at lists.mcs.anl.gov]
Sent: Thursday, May 07, 2015 4:03 PM
To: nek5000-users at lists.mcs.anl.gov
Subject: [Nek5000-users] Compiling nek5000 with MPI on Mac.

Hi,
I'm trying to use nek5000 with MPI on a Mac.  OS is Yosemite.

Fortran compiler = gfortran:

nikolai:eddy wenhaowu$ gfortran --version
GNU Fortran (GCC) 5.1.0
Copyright (C) 2014 Free Software Foundation, Inc.

C compiler = mpicc from mpich:

nikolai:eddy wenhaowu$ mpicc --version
Apple LLVM version 6.1.0 (clang-602.0.49) (based on LLVM 3.6.0svn)
Target: x86_64-apple-darwin14.3.0
Thread model: posix


And I followed the instruction 'QuickStart':

Here is the beginning of my 'makenek':
-----------------------------------------------------------------
#!/bin/bash

# Nek5000 build config file

# (c) 2008,2009,2010 UCHICAGO ARGONNE, LLC


# source path

SOURCE_ROOT="/Users/wenhaowu/Documents/testcases/nek5/trunk/nek"


# Fortran compiler

F77="gfortran"


# C compiler

CC="mpicc"


# pre-processor symbol list

# (set PPLIST=? to get a list of available symbols)

#PPLIST="?"


# plug-in list

PLUGIN_LIST=""



# OPTIONAL SETTINGS

# -----------------


# enable MPI (default true)

#IFMPI="false"

...
-----------------------------------------------------------------

Here is my command:
./makenek eddy_uv

Here is an example what goes wrong:
-------------------------------------------------------------------------
mpicc -c  -O2 -DPTRSIZE8 -DMPI -DLONGINT8 -DUNDERSCORE -DGLOBAL_LONG_LONG  -DPRE

FIX=jl_ /Users/wenhaowu/Documents/testcases/nek5/trunk/nek/nek_comm.c -o obj/nek

_comm.o

In file included from /Users/wenhaowu/Documents/testcases/nek5/trunk/nek/nek_com

m.c:17:

/opt/local/include/mpich-mp/mpi.h:116:56: error: expected identifier

static const MPI_Datatype mpich_mpi_char               MPICH_ATTR_TYPE_TAG(char)

               = MPI_CHAR;

                                                       ^

/opt/local/include/mpich-mp/mpi.h:24:106: note: expanded from macro 'MPICH_ATTR_TYPE_TAG'

#    define MPICH_ATTR_TYPE_TAG(type)                               __attribute__((type_tag_for_datatype(MPI,type)))

                                                                                                         ^

<command line>:2:13: note: expanded from here

#define MPI 1
-------------------------------------------------------------------------

The problem is nek5000 has #defined MPI to be 1, but the mpich header file
'mpi.h' uses the symbol 'MPI' (for a completely different reason).

How do other people use nek5000 with mpi on a Mac?

Thanks.

Sincerely,

Wenhao Wu
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