Problem with MPI under latest Ubuntu version

[ingvitt]

Hi all.
Today I've upgraded my ubuntu OS to the latest version (Natty narwhal) and it seems that i can't no more run mpicc. Anytime that i run this app to compile my .c source file i got this error :

/usr/bin/ld: cannot find -lcr
collect2: ld returned 1 exit status

Before the OS upgrade i got no problem at all! i've tried to reinstall the package and stuff like this but nothing changed..

Best regards,
V

PS: sorry for my bad eng

[jikanter]

Hello,

The linker (ld), when invoked, looks for libraries of the
form lib_.so and lib_.a with lib_.so in the same directory.

By default, it uses the standard directories (/lib, /usr/lib) and
The contents of the environment variable LDPATH to find such libraries.

In your case, if the file cr.so cannot be found in either place, you will get the error
You reported.

Note: this is somewhat of a simplification, but should give you the knowledge you need to begin troubleshooting yourself.

[ingvitt]

Ty very much for your advices, anyway I managed to bypass the problem running mpicc.openmpi instead of mpicc to compile. Anyway i'll try to solve the problem with mpicc following your instructions .

Ty again.

[ingvitt]

Ok I've completely solved the problem. It seems that after the update some libs disappeared. So I've looked into synaptic for libcr and I've installed libcr-dev, this solved my problem definitely. Anyway synaptic showed me that I already have the base package libcr0 needed to use apps with the BLCR (otherwise I wouldn't be able to compile and run mpi parallel apps before the OS update).

The only things that comes to my mind is that during the OS update process some of this libs were marked as obsolete and got deleted.

Anyway tnx for the help

[zlevine]

Thanks ingvitt!

This also solved the problem for me too under Ubuntu 11.04. After running:

sudo apt-get install libcr-dev

mpicc compiles programs properly again. Looks like the 'cr' in '-lcr' and in 'libcr-dev' stands for checkpoint/restart, and is necessary for stopping and starting groups of related processes with 'the pipes that connect them'. I guess this gets blown out in 11.04, and required re-installation.

Cheers.