Etienne Fayen a écrit : > Mumps and scotch were compiled manually in /opt, following > instructions in the readmes.
I’m curious, why are you building mumps yourself? > It is caused by the following import error: > > /opt/python3-venv/lib/python3.8/site-packages/kwant-1.4.2-py3.8-linux-x86_64.egg/kwant/linalg/_mumps.cpython-38-x86_64-linux-gnu.so: > undefined symbol: GOMP_loop_nonmonotonic_dynamic_start > > This points again to my hand-built Mumps, so again not a kwant issue > per se. GOMP refers to GNU OpenMP. OpenMP is used for example by OpenBLAS that you are most likely using through Mumps. Perhaps you have to link your Mumps (or some other component) with OpenMP by using the linker flag '-lgomp' or '-fopenmp'. You can also try adding 'gomp' to Kwant’s build.conf under 'libraries'. Christoph
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