[Users] ld error while linking simfactory on a HPC

Schaffarczyk, Alois alois.schaffarczyk at fh-kiel.de
Tue Nov 26 09:37:40 CST 2019

Dear all,

I tried to compile simfactory on a German HPC (HLRN4) at Goettingen
named "Emmy" - probably from Emmy Noether as she worked a long time there. (She is well-known from the Noether-theorem and abstract algebra)

Unfortunately linking was not successful:

/usr/bin/ld: warning: libgfortran.so.3, needed by /lib/../lib64/liblapack.so, may conflict with libgfortran.so.5
/usr/bin/ld: /home/shicfdfh/Einstein-toolkit/Cactus/configs/sim/scratch/external/hwloc/lib/libhwloc.a(topology-linux.o): undefined reference to symbol 'udev_device_unref@@LIBUDEV_183'
/usr/lib64/libudev.so.1: error adding symbols: DSO missing from command line
collect2: Fehler: ld gab 1 als Ende-Status zurück
make[1]: *** [/home/shicfdfh/Einstein-toolkit/Cactus/exe/cactus_sim] Fehler 1
make: *** [sim] Fehler 2

Remark: "Fehler" is German and means ERROR.

meanwhile I received feedback from our HPC-support:

He says: libudev.so.1  contains demanded ref to "183" and he asks if the order of options in the specific command-line is right:
(from stackoverflow)

"...Explanation: the linking is dependent on the order of modules.

Symbols are first requested, and then linked in from a library that has them. So you have to specify modules that use libraries first, and libraries after them. "

I must admit, that I'm not able to locate the line/file to which this might apply

Does anybody have an idea which may resolve the bug ?

Many thanks in advance advance and best wishes

Alois Peter from Kiel, Germany

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