Cannot find -lkokkos

[JosefRuzicka]

Hello, I'm trying to run the Cxx11 kokkos programs, but when I write "make kokkos" I get the following error: "/usr/bin/ld: cannot find -lkokkos", any chance you have experience compiling these programs with the current version of Kokkos so that you could help me?

[jeffhammond]

Unfortunately, the PRK build system lacks any automation, so you'll have to build Kokkos yourself and set the flags in make.defs appropriately, for example, like the GCC template shows (https://github.com/ParRes/Kernels/blob/default/common/make.defs.gcc#LL141C25-L141C25).

If this doesn't resolve your problem, can you provide more details, so I can give you more precise suggestions.

[JosefRuzicka]

Thank you for answering!
I installed Kokkos with the script provided:
cmake .. -DKokkos_ENABLE_CUDA=True \ -DCMAKE_CXX_COMPILER=$HOME/KOKKOS/git/bin/nvcc_wrapper \ -DCMAKE_INSTALL_PREFIX=$HOME/KOKKOS/install-cuda \ -DKokkos_ARCH_POWER9=ON \ -DKokkos_ARCH_VOLTA70=ON \ -DKokkos_ENABLE_CUDA_LAMBDA=ON \ && make -j install
which creates in my bin directory a kokkos folder with the include folder and the lib64 folder (which has a libkokkoscore and a libkokkoscontainers).

I created a make.defs.kokkos in the common folder by copying the make.defs.cuda and updating the KOKKOSDIR to my kokkos installation path.

I'm not sure if there is a flag I could add to my make.defs.kokkos file so that it helps me find -lkokkos during make kokkos. I'm just trying to compile the already existing kokkos programs: stencil-kokkos.cc, transpose-kokkos...

If I just remove the -lkokkos flag from the compilation line, I get an error indicating that there are undefined references to every kokkos related function like Kokkos::initialize() and Kokkos::Finalize()

[jeffhammond]

Are you using a Power9 machine?

[jeffhammond]

Add -L$path_to_kokkos to KOKKOSFLAG

[jeffhammond]

The build system needs common/make.defs so copy whatever template you use to that filename, and no other.

[JosefRuzicka]

Im using an amd x86_64 machine, but I have tried different installations. with the one for power 9, it cant find -lkokkos, using:
cmake /home/jruzicka/Kokkos/kokkos \ -DCMAKE_CXX_COMPILER=/opt/compilers/gcc-11.1.0/bin/gcc \ -DCMAKE_INSTALL_PREFIX=/home/jruzicka/bin/kokkos\ -DKokkos_ENABLE_OPENMP=On \ -DKokkos_ARCH_HSW=On
I get this error:
In file included from prk_kokkos.h:36, from pic-kokkos.cc:67: /home/jruzicka/bin/kokkos_x86_64/include/Kokkos_Concepts.hpp:19:15: error: static assertion failed: Including non-public Kokkos header files is not allowed. 19 | static_assert(false, | ^~~~~ In file included from prk_kokkos.h:37, from pic-kokkos.cc:67: /home/jruzicka/bin/kokkos_x86_64/include/Kokkos_MemoryTraits.hpp:19:15: error: static assertion failed: Including non-public Kokkos header files is not allowed. 19 | static_assert(false,

and with the other installation:
cmake /home/jruzicka/Kokkos/kokkos \ -DCMAKE_CXX_COMPILER=/opt/compilers/gcc-11.1.0/bin/gcc \ -DCMAKE_INSTALL_PREFIX=/home/jruzicka/bin/kokkos_x86_64 \ -DKokkos_ENABLE_OPENMP=On \ -DKokkos_ARCH_NATIVE=On
I get that same second error again about static assertions.

I have had no trouble compiling and running the kokkos tutorials and some programs of my own but compiling kokkos everytime with a Makefile, yeah I moved the common/make.defs.kokkos I made into a common/make.defs

My make.defs kokkos part looks like this:
KOKKOSDIR=/home/jruzicka/bin/kokkos_x86_64 120 KOKKOSFLAG=-I${KOKKOSDIR}/include -L${KOKKOSDIR}/lib64 -lkokkos ${OPENMPFLAG}