Denis

OK thanks a lot !

BTW this is exactly the hardware setup we have, just double GPU/RAM/Cores. [setup](https://docs.olcf.ornl.gov/systems/spock_quick_start_guide.html) I was trying to use it to find out optimal options for SLURM, but if you can...

Sure, and i think i will discover more things along the way

You are right about the array, it is just a non valid construct but strange, the compiler did not complain! I will try your suggestion ! thx

No thanks, thanks for the info,

No indeed i will close this.

I confirm that with - g++ (GCC) 12.2.1 20221121 (Red Hat 12.2.1-7) there is no such a linking problem.. So specific to gcc13.x version ...

redoing the full build procedure ( using `rm .build` as suggested) gives the following output: ``` n file included from /lustre/rz/dbertini/gpu/picongpu_v0.7.0/picongpu/include/picongpu/main.cpp:23: In file included from /lustre/rz/dbertini/gpu/picongpu_v0.7.0/picongpu/include/picongpu/../picongpu/simulation_defines.hpp:42: In file included from...

the compiler used is the one from `Rocky Linux 8.9 gcctoolset` i.e ``` dbertini@lxbk1131 /lustre/rz/dbertini/gpu/picongpu_v0.7.0/sim/lwfa]$ g++ --version g++ (GCC) 13.1.1 20230614 (Red Hat 13.1.1-4) Copyright (C) 2023 Free Software Foundation,...

trying with `serial option` does not help either: ``` [dbertini@lxbk1131 /lustre/rz/dbertini/gpu/picongpu_v0.7.0/sim/lwfa]$ pic-build -b serial -c '-DBOOST_ROOT=/usr -DMPI_CXX_WORKS=ON -DMPI_CXX_VERSION=0' build directory: .build cmake command: cmake -DCMAKE_INSTALL_PREFIX=/lustre/rz/dbertini/gpu/picongpu_v0.7.0/sim/lwfa -DPIC_EXTENSION_PATH=/lustre/rz/dbertini/gpu/picongpu_v0.7.0/sim/lwfa -DBOOST_ROOT=/usr -DMPI_CXX_WORKS=ON -DMPI_CXX_VERSION=0 -Dalpaka_ACC_CPU_B_SEQ_T_SEQ_ENABLE=ON...