OCamlMPI problem

OCamlMPI problem

[Rod]

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Hi all,

    I'm trying to compile the test file using ocamlmpi, but just what I have
is this message
-------------------------------------------------------------------------------
ocamlc -o testmpi unix.cma mpi.cma test.ml -ccopt -L.
File "test.ml", line 144, characters 6-9:
Warning Y: unused variable res.
/usr/bin/ld: cannot find -lmpi
collect2: ld returned 1 exit status
Error while building custom runtime system
-----------------------------------------------------------------------------

I'm using mpich2-1.0.5p4.

Thanks in advance for any answer.

Cheer,
Rodiney

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Re: [Caml-list] OCamlMPI problem

[skaller]

On Mon, 2007-09-17 at 18:08 -0300, Rod wrote:
> Hi all,
> 
>     I'm trying to compile the test file using ocamlmpi, but just what
> I have is this message
> -------------------------------------------------------------------------------
> ocamlc -o testmpi unix.cma mpi.cma test.ml -ccopt -L.
> File "test.ml", line 144, characters 6-9:
> Warning Y: unused variable res.
> /usr/bin/ld: cannot find -lmpi
> collect2: ld returned 1 exit status
> Error while building custom runtime system
> -----------------------------------------------------------------------------
> 
> I'm using mpich2-1.0.5p4.

Try 'locate libmpi' to find where it is on your system.
I have this:

$ ls -lasp /usr/lib/libmpi.so
0 lrwxrwxrwx 1 root root 27 2006-08-29 06:45 /usr/lib/libmpi.so
-> /etc/alternatives/libmpi.so

$ ls -lasp /etc/alternatives/libmpi.so
0 lrwxrwxrwx 1 root root 37 2007-04-20 04:06 /etc/alternatives/libmpi.so
-> /usr/lib/mpich/lib/shared/libmpich.so

$ ls -lasp /usr/lib/mpich/lib/shared/libmpich.so 
0 lrwxrwxrwx 1 root root 15 2007-04-20
03:52 /usr/lib/mpich/lib/shared/libmpich.so -> libmpich.so.1.0

$ ls -lasp /usr/lib/mpich/lib/shared/libmpich.so.1.0
824 -rw-r--r-- 1 root root 837128 2006-11-12
06:59 /usr/lib/mpich/lib/shared/libmpich.so.1.0

Hey, finally found it! [Ubuntu Linux]

-- 
John Skaller <skaller at users dot sf dot net>
Felix, successor to C++: http://felix.sf.net

Re: [Caml-list] OCamlMPI problem

[Andres Varon]

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You need to use mpicc as the C compiler and linker. That will take  
care of passing whatever flags are needed for proper compilation and  
linking. You can pass it to ocaml with:

ocamlc -cc mpicc -o testmpi unix.cma mpi.cma test.ml -ccopt -L.



Andres


On Sep 17, 2007, at 5:08 PM, Rod wrote:

> Hi all,
>
>     I'm trying to compile the test file using ocamlmpi, but just  
> what I have is this message
> ---------------------------------------------------------------------- 
> ---------
> ocamlc -o testmpi unix.cma mpi.cma test.ml -ccopt -L.
> File "test.ml", line 144, characters 6-9:
> Warning Y: unused variable res.
> /usr/bin/ld: cannot find -lmpi
> collect2: ld returned 1 exit status
> Error while building custom runtime system
> ---------------------------------------------------------------------- 
> -------
>
> I'm using mpich2-1.0.5p4.
>
> Thanks in advance for any answer.
>
> Cheer,
> Rodiney
>
> _______________________________________________
> Caml-list mailing list. Subscription management:
> http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list
> Archives: http://caml.inria.fr
> Beginner's list: http://groups.yahoo.com/group/ocaml_beginners
> Bug reports: http://caml.inria.fr/bin/caml-bugs


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Re: [Caml-list] OCamlMPI problem

[Rod]

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Hi again buddies!!
First, thanks for replying me.
Well... I just tried to locate 'libmpi.a' as you can see below:

[rodiney@homer ocamlmpi-1.01]$ locate libmpi.a
/usr/lib/lam/libmpi.a

Then, I tried the following:

[rodiney@homer ocamlmpi-1.01]$ ocamlc -o testmpi mpi.cma unix.cma
test.ml-ccopt -L /usr/lib/lam/libmpi.a

File "test.ml", line 144, characters 6-9:
Warning Y: unused variable res.
/usr/bin/ld: cannot find -lcamlmpi
collect2: ld returned 1 exit status
Error while building custom runtime system

and then I tried to do the following as well:

[rodiney@homer ocamlmpi-1.01]$ ocamlc -cc mpicc -o testmpi unix.cma mpi.cma
test.ml -ccopt -L `locate libmpi.a`

File "test.ml", line 144, characters 6-9:
Warning Y: unused variable res.
/usr/bin/ld: cannot find -lcamlmpi
collect2: ld returned 1 exit status
Error while building custom runtime system

Damn it!! The build system is now asking for 'libcamlmpi.a'
So, I used 'locate' once again:

[rodiney@homer ocamlmpi-1.01]$ locate libcamlmpi
/home/rodiney/ocamlmpi-1.01/libcamlmpi.a
/usr/lib/ocaml/ocamlmpi/libcamlmpi.a

Which 'libcamlmpi.a' should I use??
So, there is a new problem! How can I solve it?? Please, any suggestion?
Thanks again!!

On 9/18/07, Andres Varon <avaron@gmail.com> wrote:
>
> You need to use mpicc as the C compiler and linker. That will take care of
> passing whatever flags are needed for proper compilation and linking. You
> can pass it to ocaml with:
> ocamlc -cc mpicc -o testmpi unix.cma mpi.cma test.ml -ccopt -L.
>
>
>
> Andres
>
>
> On Sep 17, 2007, at 5:08 PM, Rod wrote:
>
> Hi all,
>
>     I'm trying to compile the test file using ocamlmpi, but just what I
> have is this message
>
> -------------------------------------------------------------------------------
> ocamlc -o testmpi unix.cma mpi.cma test.ml -ccopt -L.
> File "test.ml", line 144, characters 6-9:
> Warning Y: unused variable res.
> /usr/bin/ld: cannot find -lmpi
> collect2: ld returned 1 exit status
> Error while building custom runtime system
>
> -----------------------------------------------------------------------------
>
> I'm using mpich2-1.0.5p4.
>
> Thanks in advance for any answer.
>
> Cheer,
> Rodiney
>
> _______________________________________________
> Caml-list mailing list. Subscription management:
> http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list
> Archives: http://caml.inria.fr
> Beginner's list: http://groups.yahoo.com/group/ocaml_beginners
> Bug reports: http://caml.inria.fr/bin/caml-bugs
>
>
>

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Re: [Caml-list] OCamlMPI problem

[Rod]

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Hi again folks!!
I'm really happy to announce you, guys, that, eventually, I got OcamlMPI
working good on my cluster. What I mean is: the problem about compiling and
executing the examples files provided by the latest release of OcamlMPI (i.e:
testmpi 'n test_mandel) is now definitely solved. Thus, once more, I would
like to thank Andres Varon and Rabih Chaar for helping me handling that
issue. You guys rock! :D
Well... let me to explain how I get OcamlMPI working nice with MPICH2. Then,
maybe, this could be useful for someone else. Here we go:

By watching the Makefile of OcamlMPI, I could understand that it is always
making reference to libmpi.a library (-lmpi). However, MPICH2 doesn't have
any libmpi.a. So, what to do then??
Well.. there isn't any libmpi.a but there is a lib called libmpich.a
Therefore, all I did was replace the '-lmpi' options found in such Makefile
with '-lmpich'. What this means it that the Makefile will now look for a lib
called libmpich.a (and no more libmpi.a) which exists in the MPICH2
implementation of MPI.
That is it!! After doing this and following some further instructions as we
can read in the README file (e.g.: ./configure, make, make install, etc)
found in the OcamlMPI install directory, everything worked good.

As mentioned earlier by our friend Andres Varon, the line "ocamlc -cc mpicc
-o testmpi unix.cma mpi.cma test.ml -ccopt -L." was enough to Ocaml for
proper compilation and linking.

OK. If MPICH2 is proper installed and configured on your cluster system,
there will be no problems for running the examples files (as well as others
executables).

So, OcamlMPI problem is now solved. Thanks y'all guys for everything you
did.
Best regards,


                      Rodiney E.

On 9/18/07, Andres Varon <avaron@gmail.com> wrote:
>
> I'm sure that the line I suggested will work just fine. Just give it a
> try.
> Andres
> On Sep 18, 2007, at 3:23 PM, Rod wrote:
>
> ocamlc -cc mpicc -o testmpi unix.cma mpi.cma test.ml -ccopt -L `locate
> libmpi.a`
>
>
>

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Re: [Caml-list] OCamlMPI problem

[Jhou ^^]

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Hi list!!!
After a hard work, I've eventually got testempi compiled. However, I'm
facing a new kind of problem now. When I just try to run testempi with
mpiexec tool, the 'mpd' process manager (that is, the default process
manager provided by MPICH2 implementation of MPI library) can not  work
properly. Instead,  I got an error message that says the 'lamd' daemon isn't
running. So, it asks me for starting 'lamboot'. So, I'm litte confused here:
is lamboot a tool from LAM/MPI Implementation, isn't it? Then, what about
MPICH2? I mean... do I need to use LAM/MPI to execute ocaml MPI application?
How can I get ocaml working good with MPICH2? 'cause I've already installed
and configured MPICH2 in my cluster.
By the way, does anybody know where to find a good tutorial about ocaml
MPI?? You know.. something with examples and so on!
Thanks in advance in sorry for my bad english!!

2007/9/18, Andres Varon <avaron@gmail.com>:
>
> You need to use mpicc as the C compiler and linker. That will take care of
> passing whatever flags are needed for proper compilation and linking. You
> can pass it to ocaml with:
> ocamlc -cc mpicc -o testmpi unix.cma mpi.cma test.ml -ccopt -L.
>
>
>
> Andres
>
>
> On Sep 17, 2007, at 5:08 PM, Rod wrote:
>
> Hi all,
>
>     I'm trying to compile the test file using ocamlmpi, but just what I
> have is this message
>
> -------------------------------------------------------------------------------
> ocamlc -o testmpi unix.cma mpi.cma test.ml -ccopt -L.
> File "test.ml", line 144, characters 6-9:
> Warning Y: unused variable res.
> /usr/bin/ld: cannot find -lmpi
> collect2: ld returned 1 exit status
> Error while building custom runtime system
>
> -----------------------------------------------------------------------------
>
> I'm using mpich2-1.0.5p4.
>
> Thanks in advance for any answer.
>
> Cheer,
> Rodiney
>
> _______________________________________________
> Caml-list mailing list. Subscription management:
> http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list
> Archives: http://caml.inria.fr
> Beginner's list: http://groups.yahoo.com/group/ocaml_beginners
> Bug reports: http://caml.inria.fr/bin/caml-bugs
>
>
>
> _______________________________________________
> Caml-list mailing list. Subscription management:
> http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list
> Archives: http://caml.inria.fr
> Beginner's list: http://groups.yahoo.com/group/ocaml_beginners
> Bug reports: http://caml.inria.fr/bin/caml-bugs
>
>

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