You were right:
The mistake was in the PETSC_DIR variable. configuring this way ./configure PETSC_DIR=/home/tobias/PETSc/petsc-3.6.2 PETSC_ARCH=arch-linux2-c-debug --enable-everything --enable-petsc --enable-mpi > log.txt gives me, among other errors, the messages below. Makefile_config_petsc:1: /home/tobias/PETSc/petsc-3.6.2/conf/variables: No such file or directory make: *** No rule to make target `/home/tobias/PETSc/petsc-3.6.2/conf/variables'. Stop. Makefile_config_petsc:1: /home/tobias/PETSc/petsc-3.6.2/conf/variables: No such file or directory make: *** No rule to make target `/home/tobias/PETSc/petsc-3.6.2/conf/variables'. Stop. This is why I ended up using the incorrect PESC_DIR value: "/conf/variables" is located in "/home/tobias/PETSc/petsc-3.6.2/lib/petsc/" I also attached the new config.log file Again, thank you for all your help ________________________________ Von: John Peterson <jwpeter...@gmail.com> Gesendet: Mittwoch, 4. November 2015 16:30 An: tschroeder Cc: libmesh-users Betreff: Re: [Libmesh-users] Neumann boundary problem for Laplace equation On Wed, Nov 4, 2015 at 2:04 PM, tschroeder <tschroe...@daad-alumni.de<mailto:tschroe...@daad-alumni.de>> wrote: Here it is. OK, so one issue is that your PETSc was not found properly: configure:29442: checking /home/tobias/PETSc/petsc-3.6.2/lib/petsc/include/petscversion.h usability configure:29442: mpicc -c conftest.c >&5 conftest.c:143:75: fatal error: /home/tobias/PETSc/petsc-3.6.2/lib/petsc/include/petscversion.h: No such file or directory #include </home/tobias/PETSc/petsc-3.6.2/lib/petsc/include/petscversion.h> ^ it looks like your PETSC_DIR variable may not be set quite right. This doesn't really explain the segfault you are seeing, but ensuring libmesh finds PETSc -- and uses the same MPI that PETSc is using -- may end up fixing the problem. -- John
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