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Subject: [OMPI users] libmpi.so.0 not found during gdb debugging
From: swagat mishra (swagatmishra2007_at_[hidden])
Date: 2011-02-10 12:43:03


hello everyone,
i have a network of systems connected over lan with each computer running
ubuntu. openmpi 1.4.x is installed on 1 machine and the installation is
mounted on other nodes through Networking File System(NFS). the source
program and compiled file(a.out) are present in the mounted directory
i run my programs by the following command:
/opt/project/bin/mpirun -np 4 --prefix /opt/project/ --hostfile hostfile
a.out
i have not set LD_LIBRARY_PATH but as i use --prefix mpirun works
successfully

however as per the open mpi debugging faq:
http://www.open-mpi.org/faq/?category=debugging
when i run
 /opt/project/bin/mpirun -np 4 --prefix /opt/project/ --hostfile hostfile
-x DISPLAY=10.0.0.1:0.0 xterm -e gdb a.out

4 xterm windows are opened with gdb running as expected. however when i give
the command start to gdb in the windows corresponding to remote nodes, i get
the error:
libmpi.so.0 not found: no such file/directory

as mentioned other mpi jobs run fine with mpirun

when i execute
/opt/project/bin/mpirun -np 4 --prefix /opt/project/ -x DISPLAY=10.0.0.1:0.0
xterm -e gdb a.out ,the debugging continues succesfully

please help