Greetings MPICH experts,

I've run code with MPICH often on my Macbook Pro (4 cores), but not lately. Recently I updated MPICH from Macports, preparing for new running. Now my code doesn't compile. Do you know this error message:
------
mpicc -c -O3   -DMPI -DPRECISION=2 -I. -DNHYP -DLU ../generic/com_mpi.c
In file included from ../generic/com_mpi.c:104:
/opt/local/include/mpich-clang37/mpi.h:116:56: error: expected identifier
static const MPI_Datatype mpich_mpi_char             MPICH_ATTR_TYPE_T...
                                                     ^
/opt/local/include/mpich-clang37/mpi.h:24:106: note: expanded from macro
      'MPICH_ATTR_TYPE_TAG'
...__attribute__((type_tag_for_datatype(MPI,type)))
                                          ^
<command line>:1:13: note: expanded from here
#define MPI 1
            ^
-----
and then there is a sequence of similar messages, all regarding mpi.h. The compilation halts after 20 messages.

I originally tried this with mpich-default, with the same result. I wondered if it had to do with an incompatibility with clang, so I installed mpich-clang37 @3.1.4_1+gcc49, with the above result.

The same code still runs on current MPICH and MVAPICH installations on several systems.

Thanks for your help,
Ben

-- 
Prof. Benjamin Svetitsky          Phone:            +972-3-640 8870
School of Physics and Astronomy   Fax:              +972-3-640 7932
Tel Aviv University               E-mail:      bqs@julian.tau.ac.il
69978 Tel Aviv, Israel            WWW:  http://julian.tau.ac.il/bqs