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

Prefer installing Open MPI 4.1.4 or later. For details, see Open MPI Installation Guide.

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.