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MPI Issues with installing SU2 Parallel on AWS ParallelCluster

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Old   November 3, 2023, 16:33
Default MPI Issues with installing SU2 Parallel on AWS ParallelCluster
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A Roy
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I am trying to install SU2 on AWS ParallelCluster (slurm as the scheduler) and the parallel build-from-source on Ubuntu 20.04 refuses to work for me, approaches so far:

*ParallelCluster comes with OpenMPI 4.1.5 pre-installed, but using configuring meson with -Dwith-mpi=enabled does not pick it up*
As well as the above:
1. Configuring with MPICH from the ubuntu packages does not get picked up
2. Removing the existing MPI using sudo apt-get remove openmpi* and sudo apt-get autoremove, then rebuilding OpenMPI from source does not get picked up

Trying any of the above options with -Dcustom-mpi=true and export CC=mpicc, export CXX=mpicxx with meson encounters a problem at ninja build immediately with a cannot find mpi.h error despite the include path being shown by trying mpicc -showme

The only option that kind of works is carrying out the above remove steps in 2 then installing OpenMPI with the ubuntu openmpi-bin openmpi-common and libopenmpi-dev packages. With this, -Dwith-mpi=enabled picks up MPI and gets built. However, attempting to run SU2_CFD with mpirun results in the below error:

mpirun: symbol lookup error: /usr/lib/x86_64-linux-gnu/openmpi/lib/openmpi3/ undefined symbol: pmix_value_load

Browsing StackOverflow suggests that the above is due to different mpi versions being used for compile and for build or run...which suggests further that the remove openmpi* options are not doing a good enough job?

Any other ideas on how to try and get the mpi version of SU2 built on ParallelCluster or troubleshooting methods?

Thank you!
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