#2528: ExternalLibraries/libjpeg thorn adds problematic system library path to Cactus

Reporter: Michael Müller Status: new Milestone: Version: ET_2020_11 Type: bug Priority: major Component: EinsteinToolkit thorn

I have been trying to work with the new ET_2020_11 version, but while the compilation seems to work, upon submission of a run, MPI immediately generates an error message connected to a failure of the MPI_INIT routine (output in "run_name".err):

``` *** An error occurred in MPI_Init_thread *** on a NULL communicator *** MPI_ERRORS_ARE_FATAL (processes in this communicator will now abort, *** and potentially your MPI job) [cn076:4193] Local abort before MPI_INIT completed completed successfully, but am not able to aggregate error messages, and not able to guarantee that all other processes were killed! *** An error occurred in MPI_Init_thread *** on a NULL communicator *** MPI_ERRORS_ARE_FATAL (processes in this communicator will now abort, *** and potentially your MPI job) [cn076:4192] Local abort before MPI_INIT completed completed successfully, but am not able to aggregate error messages, and not able to guarantee that all other processes were killed! -------------------------------------------------------------------------- Primary job terminated normally, but 1 process returned a non-zero exit code. Per user-direction, the job has been aborted. -------------------------------------------------------------------------- -------------------------------------------------------------------------- mpirun detected that one or more processes exited with non-zero status, thus causing the job to be terminated. The first process to do so was:

Process name: [[62070,1],1] Exit code: 1 -------------------------------------------------------------------------- ```

This is indicating some clash with OpenMPI. This turned out to be connected to the ExternalLibraries/libjpeg thorn. The thorn ExternalLibraries/libjpeg finds a jpeg library in the directory "/usr/lib/x86_64-linux-gnu", and adds this path via the -L option to the library search path of Cactus. Unfortunately, this is a system library path. As a consequence, the linker then picks the MPI library in this directory instead of the one specified via MPI_DIR, which creates the inconsistencies that cause the failure.

Upon exclusion of this thorn and the connected CactusIO/IOJpeg thorn and recompilation this error does not occur anymore and all libraries are imported correctly. I do not use these thorns, so this is not a problem for me, but it would be great, if someone could have a look at this.

(error encountered by me and source identified by @{557058:56049c54-f8c2-4b6c-9b88-ab697c967495} )

-- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2528/externallibraries-...