[Coin-symphony] Symphony 5 with mpi and static compilation

[alexleb]

Thanks for pointing to the wrapper, indeed, it doesn't look to complex to
do. If I use it with my mpi code I will send back the mpi wrapper for
review.

As for static build that could be nice (ie when you submit job to clusters,
you want to have only 1 exec that is not dependable on various library).  If
you make the change in the Makefile, please let me know.

Best,

Alexandre Le Bouthillier
Alexleb at crt dot umontreal dot ca
Centre de Recherche sur les Transports
C.P. 6128, succ. centre-ville
(UdeM, 2920 Chemin des services #3517)
Montreal (Qc) Canada, H3C 3J7


-----Original Message-----
From: Ted Ralphs [mailto:tkralphs at lehigh.edu] 
Sent: Tuesday, July 05, 2005 4:06 PM
To: Alexandre Le Bouthillier
Cc: coin-symphony at list.coin-or.org
Subject: Re: [Coin-symphony] Symphony 5 with mpi and static compilation

Alexandre Le Bouthillier wrote:

> 2 beginners questions: 
> 
> 1) In the doc, it says it should be easy to use mpi instead of pvm.  How
easy, 
> any tips, any planned release to support mpi ?

It should not be too difficult---the communication calls are wrapped and 
the PVM dependence is encapsulated in a single file, 
SYMPHONY/Common/proccom.c, that would have to be reimplemented. I do 
plan to do this, but I'm not sure when I will get around to it. It might 
be a while :).

> 2) When running an Application (for example the vrp one), it needs many
shared 
> library, where in the Makefile of Symphony and the Makefile of the VRP 
> application do I tell to link with -static to get an application that is
not 
> dependent of these shared library (for example, to submit to a pbs system
for 
> which I'm not root)
> 
> (ldd vrp needs libsym_app.so, libCoin.so, libOsi.so, libOsiClp.so,
libClp.so, 
> libCgl.so that I would like to have included)

If you need a static executable, adding -static to the command line 
should work with gcc, but there is no variable to do this in the current 
Makefile. You would have to add it by hand in the appropriate places. I 
should be able to add this capability to the Makefile fairly easily if 
you feel like downloading the very latest SYMPHONY from COIN 
(instructions are on the Web page). Alternatively, you could change the 
library type to static and recompile all of the COIN libraries and 
SYMPHONY. The Makefile in the currently posted version of SYMPHONY 
supports automatic compilation of COIN, but not with static libraries. 
Again, I could add this if it is useful. Please let me know if you have 
any questions.

Thanks for your support!

Cheers,

Ted
-- 
Dr. Ted Ralphs
Assistant Professor
Industrial and Systems Engineering
Lehigh University
(610)758-4784
tkralphs at lehigh.edu
www.lehigh.edu/~tkr2

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