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Subject: Re: [OMPI users] intel compiler linking issue and issue of environment variable on remote node, with open mpi 1.4.3
From: yanyg_at_[hidden]
Date: 2011-03-24 14:45:59

Thanks for your information. For my Open MPI installation, actually
the executables such as mpirun and orted are dependent on those
dynamic intel libraries, when I use ldd on mpirun, some dynamic
libraries show up. I am trying to make these open mpi executables
statically linked with these intel libraries, but it shows no progress
even if I use "--with-gnu-ld" with specific static intel libraries set in
LIBS when I configure open mpi 1.4.3 installation. It seems there
are something for the compiling process of open mpi 1.4.3 that I do
not have control, or I just missed something. I will try different
things, and will report here once I have a confirmative conclusion.
However, any hints or information on how to make open mpi
executables statically linked to intel libs through intel compilers are
very welcomed. Thanks!

As for the issue that environment variables set in a script do not
propagate to remote slave nodes, I use rsh connection for
simplicity. If I set PATH and LD_LIBRARY_PATH in ~/.bashrc
(which shared by all nodes, master or slave), my MPI application
does work as expected, and this confirms Ralph's suggestions.
The thing is that I just want to avoid set the environment variables in
 .bashrc or .porfile file, but instead, set them in the script, and want
these environment variables propagating to other slave nodes
when I do mpirun, as I could do for MPICH. I also try use the prefix
path before mpirun when I do mpirun, as suggested by Jeff, it does
not work either. Any hints to solve this issue?


On 23 Mar 2011, at 12:00, users-request_at_[hidden] wrote:

> On Mar 21, 2011, at 8:21 AM, yanyg_at_[hidden] wrote:
> > The issue is that I am trying to build open mpi 1.4.3 with intel
> > compiler libraries statically linked to it, so that when we run
> > mpirun/orterun, it does not need to dynamically load any intel
> > libraries. But what I got is mpirun always asks for some intel
> > library(e.g. if I do not put intel library path on
> > library search path($LD_LIBRARY_PATH). I checked the open mpi user
> > archive, it seems only some kind user mentioned to use
> > "-i-static"(in my case) or "-static-intel" in ldflags, this is what
> > I did, but it seems not working, and I did not get any confirmation
> > whether or not this works for anyone else from the user archive.
> > could anyone help me on this? thanks!
> Is it Open MPI's executables that require the intel shared libraries
> at run time, or your application? Keep in mind the difference:
> 1. Compile/link flags that you specify to OMPI's configure script are
> used to compile/link Open MPI itself (including executables such as
> mpirun).
> 2. mpicc (and friends) use a similar-but-different set of flags to
> compile and link MPI applications. Specifically, we try to use the
> minimal set of flags necessary to compile/link, and let the user
> choose to add more flags if they want to. See this FAQ entry for more
> details:
> fter -v1.0
> > (2) After compiling and linking our in-house codes with open mpi
> > 1.4.3, we want to make a minimal list of executables for our codes
> > with some from open mpi 1.4.3 installation, without any dependent on
> > external setting such as environment variables, etc.
> >
> > I orgnize my directory as follows:
> >
> > parent---
> > |
> > package
> > |
> > bin
> > |
> > lib
> > |
> > tools
> >
> > In package/ directory are executables from our codes. bin/ has
> > mpirun and orted, copied from openmpi installation. lib/ includes
> > open mpi libraries, and intel libraries. tools/ includes some
> > c-shell scripts to launch mpi jobs, which uses mpirun in bin/.
> FWIW, you can use the following OMPI options to configure to eliminate
> all the OMPI plugins (i.e., locate all that code up in libmpi and
> friends, vs. being standalone-DSOs):
> --disable-shared --enable-static
> This will make libmpi.a (vs. and a bunch of plugins) which
> your application can statically link against. But it does make a
> larger executable. Alternatively, you can:
> --disable-dlopen
> (instead of disable-shared/enable-static) which will make a giant
> (vs. and all the plugin DSOs). So your MPI app
> will still dynamically link against libmpi, but all the plugins will
> be physically located in vs. being dlopen'ed at run time.
> > The parent/ directory is on a NFS shared by all nodes of the
> > cluster. In ~/.bashrc(shared by all nodes too), I clear PATH and
> > LD_LIBRARY_PATH without direct to any directory of open mpi 1.4.3
> > installation.
> >
> > First, if I set above bin/ directory to PATH and lib/
> > LD_LIBRARY_PATH in ~/.bashrc, our parallel codes(starting by the C
> > shell script in tools/) run AS EXPECTED without any problem, so that
> > I set other things right.
> >
> > Then again, to avoid modifying ~/.bashrc or ~/.profile, I set bin/
> > to PATH and lib/ to LD_LIBRARY_PATH in the C shell script under
> > tools/ directory, as:
> >
> > setenv PATH /path/to/bin:$PATH
> > setenv LD_LIBRARY_PATH /path/to/lib:$LD_LIBRARY_PATH
> Instead, you might want to try:
> /path/to/mpirun ...
> which will do the same thing as mpirun's --prefix option (see
> mpirun(1) for details here), and/or use the
> --enable-mpi-prefix-by-default configure option. This option, as is
> probably pretty obvious :-), makes mpirun behave as if the --prefix
> option was specified on the command line, with an argument equal to
> the $prefix from configure.