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Subject: Re: [OMPI users] what is inside mpicc/mpic++
From: Shafagh Jafer (barfy27_at_[hidden])
Date: 2008-09-19 17:28:58


I did the modifications you mentioned and I got it working. Now when I use the mpirun to run an example on one or multiple machines I get the following error:
=====================================================
"error while loading shared libraries: libmpi_cxx.so.0: cannot open shared object file: No such file or directory
=======================================================
It seems that it can not find libmpi files. I am attaching my makefile.common.

--- On Thu, 9/18/08, Jeff Squyres <jsquyres_at_[hidden]> wrote:

From: Jeff Squyres <jsquyres_at_[hidden]>
Subject: Re: [OMPI users] what is inside mpicc/mpic++
To: "Open MPI Users" <users_at_[hidden]>
Date: Thursday, September 18, 2008, 5:30 AM

I believe that the problem is your "-DMPI" in your Makefile. The line
 
in question in mpicxx.h is:

namespace MPI {

When you use -DMPI, the preprocessor replaces this with:

namespace 1 {

which is not legal.

In short, the application using the name "MPI" is illegal. That name
 
is reserved for the MPI C++ namespace. If you change the name to
something else (like -DUSE_MPI, and change the source code to match),
this particular problem should be solved.

But then again, I'm not sure why you changed CPP to g++ and CC to gcc;
shouldn't they be mpicc?

It's also not clear from the context of Makefile.common whether CPP is
supposed to be the C preprocessor or the C++ compiler. If it's
supposed to be the C preprocessor, then "mpicc -E" would be fine; if

it's supposed to be the C++ compiler, then mpic++ (or mpiCC) would be
fine.

On Sep 18, 2008, at 1:46 AM, Shafagh Jafer wrote:

> Thanks a lot. The problem i have is that i have installed
> openmpi-1.2.7 and every thing went well and i tested hello_c and
> ring_c. But the problem now is that when i use open mpi's mpicc and
> mpic++ in my Makefile i get errors reported from inside openmpi's
> source code. I am attaching my Makefile and here I paste a snapshot
> of the errors I get:
> =========================================================
> In file included from /opt/openmpi/1.2.7/include/mpi.h:1795,
> from stdaload.cpp:33:
> /opt/openmpi/1.2.7/include/openmpi/ompi/mpi/cxx/mpicxx.h:136: parse
> error before `1'
> In file included from /opt/openmpi/1.2.7/include/openmpi/ompi/mpi/
> cxx/mpicxx.h:168,
> from /opt/openmpi/1.2.7/include/mpi.h:1795,
> from stdaload.cpp:33:
> /opt/openmpi/1.2.7/include/openmpi/ompi/mpi/cxx/functions.h:143:
> parse error before `1'
> In file included from /opt/openmpi/1.2.7/include/openmpi/ompi/mpi/
> cxx/mpicxx.h:195,
> from /opt/openmpi/1.2.7/include/mpi.h:1795,
> from stdaload.cpp:33:
> /opt/openmpi/1.2.7/include/openmpi/ompi/mpi/cxx/status.h:26: parse
> error before `::'
> /opt/openmpi/1.2.7/include/openmpi/ompi/mpi/cxx/status.h:27: parse
> error before `::'
> /opt/openmpi/1.2.7/include/openmpi/ompi/mpi/cxx/status.h:28: parse
> error before `::'
> /opt/openmpi/1.2.7/include/openmpi/ompi/mpi/cxx/status.h:102: parse
> error before `1'
> In file included from /opt/openmpi/1.2.7/include/openmpi/ompi/mpi/
> cxx/mpicxx.h:196,
> from /opt/openmpi/1.2.7/include/mpi.h:1795,
> from stdaload.cpp:33:
> /opt/openmpi/1.2.7/include/openmpi/ompi/mpi/cxx/request.h:200: parse
> error before `1'
> /opt/openmpi/1.2.7/include/openmpi/ompi/mpi/cxx/request.h:206: parse
> error before `('
> ...
> =========================================================
> Please help me. I am being turtured by this errors and can't resolve
> them :-(
> --- On Wed, 9/17/08, Terry Frankcombe <terry_at_[hidden]> wrote:
> From: Terry Frankcombe <terry_at_[hidden]>
> Subject: Re: [OMPI users] what is inside mpicc/mpic++
> To: "Open MPI Users" <users_at_[hidden]>
> Date: Wednesday, September 17, 2008, 10:35 PM
>
> In OMPI these are binaries, not scripts. Not human readable.
>
>
> [tjf_at_rscpc28 NH2+]$ ll /usr/local/bin/mpif90
> lrwxrwxrwx 1 root root 12 2008-03-05 14:39 /usr/local/bin/mpif90 ->
> opal_wrapper*
> [tjf_at_rscpc28 NH2+]$ file /usr/local/bin/opal_wrapper
> /usr/local/bin/opal_wrapper: ELF 32-bit LSB executable, Intel 80386,
> version 1
> (SYSV), for GNU/Linux 2.6.8, dynamically linked (uses shared libs),
> not stripped
>
>
>
>
> On Wed, 2008-09-17 at 22:31 -0700, Shafagh Jafer wrote:
> > I am trying to figure out a problem that i am stuck in :-
> ( could
> anyone please tell me how their mpicc/mpic++ looks like? is there
> any thing
> readable inside these files?because mine look corrupted and are
> filled with
> unreadable charachters.
> > Please let me know.
> >
> > _______________________________________________
> > users mailing list
> > users_at_[hidden]
> > http://www.open-mpi.org/mailman/listinfo.cgi/users
>
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-- 
Jeff Squyres
Cisco Systems
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