dolfin team mailing list archive

["Garth N. Wells" <g.n.wells@xxxxxxxxxx>]

I can elaborate on this problem a little more now. It appears to be an 
issue when PETSc has been compiled with UMFPACK (or perhaps only when 
PETSc downloads and links against it's own UMFPACK). There is an issue 
in linking since the same library (possibly different versions) is being 
linked to twice.

Garth

Garth N. Wells wrote:
> Adding two dummy functions to dolfin_glue.cpp fixes this problem, 
> although I don't understand it. If I check the symbols in the dolfin 
> library I get
>
> $ nm local/lib/libdolfin.so | grep umfpack
>          U umfpack_di_free_numeric
>          U umfpack_di_free_symbolic
>          U umfpack_di_numeric
>          U umfpack_di_solve
>          U umfpack_di_symbolic
>          U umfpack_di_transpose
>
> and for the pydolfin library,
>
> $  nm local/lib/python2.4/site-packages/dolfin/_dolfin.so | grep umfpack
> 000bf980 T umfpack_di_solve
> 000bf978 T umfpack_di_transpose
>
> Garth
>
> Garth N. Wells wrote:
> > I'm having trouble with pydolfin when umfpack is installed. I'm pretty 
> > sure the reason is that umfpack is a C library, which is why I get the 
> > below undefined symbol error.
> >
> > Somehow, I think
> >    extern "C"
> > needs to appear in the SWIG files somewhere as a prefix to the umfpack 
> > functions. I've tried a few things without luck. It takes an age to 
> > rebuild the SWIG interface, so I'm not getting far with stabs in the 
> > dark. Any ideas what should be done?
> >
> > Garth
> >
> >
> >
> >    garth@mech136:test$ python test.py
> > Importing DOLFIN
> > Traceback (most recent call last):
> >    File "test.py", line 10, in ?
> >      from mesh.test import *
> >    File "/tmp/dolfin/src/test/mesh/test.py", line 9, in ?
> >      from dolfin import *
> >    File 
> > "/tmp/dolfin/local/lib/python2.4/site-packages/dolfin/__init__.py", 
> > line 5, in ?
> >      from dolfin import *
> >    File 
> > "/tmp/dolfin/local/lib/python2.4/site-packages/dolfin/dolfin.py", line 
> > 4, in ?
> >      import _dolfin
> > ImportError: /tmp/dolfin/local/lib/libdolfin.so.0: undefined symbol: 
> > umfpack_di_transpose
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