[Openmp-dev] ptxas fatal : Cannot take address of function '__pthread_key_create'

[Itaru Kitayama via Openmp-dev]

Hi Alexey,
If the function is not explicitly used in the code-base in question, how do
I
find which function/module requires it?

On Tue, Sep 4, 2018 at 11:15 PM Alexey Bataev <a.bataev at outlook.com> wrote:

> It means that this function is used somewhere in the code that is offloaded to the GPU. I don't think this is correct, this function is pthreads-specific and I don't think that NVidia GPUs support pthreads.
>
> -------------
> Best regards,
> Alexey Bataev
>
> 02.09.2018 3:51, Itaru Kitayama via Openmp-dev пишет:
>
> Hi,
> I am trying to build an application that can do OpenMP offloading on a
> POWER8 + P100 system using the latest LLVM/Clang toolchain (openmp
> is too the latest).
>
> The build error is:
> [  3%] Building CXX object sli/CMakeFiles/sli_lib.dir/arraydatum.cc.o
> cd /gpfs/work/pcp0/pcp0151/build/nest-clang-upstream/sli &&
> /gpfs/work/pcp0/pcp0151/opt/llvm+clang-upstream/bin/clang++
> -Dsli_lib_EXPORTS -I/bgsys/drivers/ppcfloor/comm/gcc/include
> -I/gpfs/software/opt/gsl/2.4/include
> -I/gpfs/homeb/pcp0/pcp0151/projects/nest-simulator/libnestutil
> -I/gpfs/work/pcp0/pcp0151/build/nest-clang-upstream/libnestutil  -std=c++11
> -O2 -Wall -fopenmp -fopenmp-targets=nvptx64-nvidia-cuda
> --cuda-path=/gpfs/software/opt/cuda/9.2.88  -fPIC   -o
> CMakeFiles/sli_lib.dir/arraydatum.cc.o -c
> /gpfs/homeb/pcp0/pcp0151/projects/nest-simulator/sli/arraydatum.cc
> ptxas fatal   : Cannot take address of function '__pthread_key_create'
> clang-8: error: ptxas command failed with exit code 255 (use -v to see
> invocation)
> make[2]: *** [sli/CMakeFiles/sli_lib.dir/arraydatum.cc.o] Error 255
> make[2]: Leaving directory
> `/gpfs/work/pcp0/pcp0151/build/nest-clang-upstream'
> make[1]: *** [sli/CMakeFiles/sli_lib.dir/all] Error 2
> make[1]: Leaving directory
> `/gpfs/work/pcp0/pcp0151/build/nest-clang-upstream'
> make: *** [all] Error 2
>
> The CUDA toolkit is 9.2.88, is it possible the error is fixed in the
> latest toolkit?
>
> Thanks,
> Itaru.
>
>
> _______________________________________________
> Openmp-dev mailing listOpenmp-dev at lists.llvm.orghttp://lists.llvm.org/cgi-bin/mailman/listinfo/openmp-dev
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/openmp-dev/attachments/20180905/d146df82/attachment.html>