Hello,

I have installed (in non standard directories)

MUMPS 5.0.1
SCOTCH 6.0.4
METIS 5.1.0

resulting in following libs

libcmumps.a libdmumps.a libmpiseq.a libmumps_common.a libpord.a libsmumps.a libzmumps.a
libesmumps.a libptesmumps.a libptscotch.a libptscotcherr.a libptscotcherrexit.a libscotch.a libscotcherr.a libscotcherrexit.a libscotch_group.a
libmetis.a

I use Intel’s icc/ifort/MKL.

When building kwant, the output shows "User-configured MUMPS", no errors.

I use following build.conf file:

[mumps]

libraries = zmumps mumps_common pord metis esmumps scotch scotcherr mpiseq

library_dirs = $MUMPS/lib $METIS/lib $SCOTCH/lib

[lapack]

libraries = mkl_intel_lp64 mkl_sequential mkl_core mkl_def

library_dirs = $IMKL/mkl/lib/intel64

extra_link_args = -Wl,-rpath=$IMKL/mkl/lib/intel64

However, it seems something is going wrong since MUMPS cannot be loaded. I tried both kwant 1.0.5 and 1.1.1.

>>> from scikits import umfpack

>>> import kwant

[…]/lib/python2.7/site-packages/kwant-1.1.1-py2.7-linux-x86_64.egg/kwant/solvers/default.py:18: RuntimeWarning: MUMPS is not available, SciPy built-in solver will be used as a fallback. Performance can be very poor in this case.

>>> from kwant.linalg import mumps
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "[…]/lib/python2.7/site-packages/kwant-1.1.1-py2.7-linux-x86_64.egg/kwant/linalg/mumps.py", line 17, in <module>
from . import _mumps
ImportError: […]/lib/python2.7/site-packages/kwant-1.1.1-py2.7-linux-x86_64.egg/kwant/linalg/_mumps.so: undefined symbol: scotchfdgraphcorderinit_

Any idea how to solve this problem?

Thanks in advance!

Regards,

Stefan