Hi Lucas,

according to the logfile the problem is:
 configure:4194: checking for mpi.h
 configure:4207: mpic++ -c -g -O2 -fstack-protector-strong -Wformat 
-Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -I/usr/include/hdf5/mpich 
conftest.cpp >&5
 In file included from /usr/include/mpich/mpi.h:2231:0,
                  from conftest.cpp:11:
 /usr/include/mpich/mpicxx.h:21:4: error: #error 'Please use the same version 
of GCC and g++ for compiling MPICH and user MPI programs'

So can you please redo the test with the version of mpich that is compiled with gcc6?

  Thorsten

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