libmpi.so link is missing

[Panos Asproulis]

On Ubuntu 20.04 package libopenmpi3 does not create the link:

/usr/lib/x86_64-linux-gnu/libmpi.so

which should point to file:

/usr/lib/x86_64-linux-gnu/libmpi.so.40

as it should. As a result a compilation using one of the OpenMPI compilers such as mpicc fails during linking because the flag "-lmpi" cannot locate the libmpi.so file.

[Juhani Numminen (jsonic)]

Please install libopenmpi-dev and try the compilation again.

There is a file search available at https://packages.ubuntu.com/, for example https://packages.ubuntu.com/search?searchon=contents&keywords=libmpi.so&mode=&suite=eoan&arch=amd64.

[Panos Asproulis (panos-asproulis)]

I have libopenmpi-dev installed. This package does not resolve this issue. As a matter of fact this package does not even install the openmpi libraries. These are installed by the libopenmpi3 package I mentioned before. It is this package which should create the missing link so that both compilations and runs can be done.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Martin D. Weinberg (martin-weinberg-5)]

The obvious work around is to make the link by hand, which I did, and all is fine.

[Martin D. Weinberg (martin-weinberg-5)]

Also note: this was an upgrade from 19.10, not a new install.