On 5/8/24 10:19, Sean Carney wrote:
I am able to compile the tutorials (e.g. Step-29) that use the
SparseDirectUMFPACK class, however, if I try to run the example, I get the
following error:
./step-29: symbol lookup error: /lib/x86_64-linux-gnu/libmkl_intel_thread.so:
undefined symbol: __kmpc_global_thread_num
Does this mean that I didn't properly configure deal.II with multithreading
capabilities?
I am grateful for any suggestions that can help me resolve this issue.
I tried to find something on the internet about this, and found
https://stackoverflow.com/questions/13715979/parallel-program-giving-error-undefined-reference-to-kmpc-ok-to-fork
This suggests that the MKL was compiled with OpenMP; MKL provides BLAS and
LAPACK functions; and UMFPACK uses those.
I must admit that I don't know how to solve this. It would be a mis-configured
compilation of the MKL to not explicitly reference all libraries it needs to
link with, and there is little that deal.II can do about that after the fact.
You *could* try to use LD_PRELOAD as suggested here
https://github.com/kaldi-asr/kaldi/issues/4347
but that's an expensive solution :-(
Best
W.
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Wolfgang Bangerth email: [email protected]
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