libmpi.so.40 Not Found When Performing Parallel MPI Application Debugging

Symptom

Parallel MPI application debugging fails and the following error is reported:

Failed to launch lldb-server: /root/devkitdemo-devkitdemo-23.0.1/Compiler_and_Debugger/mpi_demo/kunpeng/a5459915/lldb-server: error while loading shared libraries: libmpi.so.40: cannot open shared object file: No such file or directory.

Key Process and Cause Analysis

libmpi.so.40 is not found.

Conclusion and Solution

Install Open MPI 4.1.4 or a later version. For details, see Installing Open MPI.

After the installation is complete, set the environment variable:

export LD_LIBRARY_PATH=/opt/test/openmpi_414/lib:$LD_LIBRARY_PATH

/opt/test/openmpi_414/lib indicates the Open MPI installation path.